fix libltt error messages
[lttv.git] / ltt / branches / poly / lttv / modules / gui / controlflow / eventhooks.c
index d458fe04ae5d94d757722aa7e3d0e8c591b5253e..e2a42d4fea5a5fa6c4a718c5b17387f448572d9c 100644 (file)
 /* Event hooks are the drawing hooks called during traceset read. They draw the
  * icons, text, lines and background color corresponding to the events read.
  *
- * Two hooks are used for drawing : draw_before and draw_after hooks. The
- * draw_before is called before the state update that occurs with an event and
- * the draw_after hook is called after this state update.
+ * Two hooks are used for drawing : before_schedchange and after_schedchange hooks. The
+ * before_schedchange is called before the state update that occurs with an event and
+ * the after_schedchange hook is called after this state update.
  *
- * The draw_before hooks fulfill the task of drawing the visible objects that
- * corresponds to the data accumulated by the draw_after hook.
+ * The before_schedchange hooks fulfill the task of drawing the visible objects that
+ * corresponds to the data accumulated by the after_schedchange hook.
  *
- * The draw_after hook accumulates the data that need to be shown on the screen
- * (items) into a queue. Then, the next draw_before hook will draw what that
+ * The after_schedchange hook accumulates the data that need to be shown on the screen
+ * (items) into a queue. Then, the next before_schedchange hook will draw what that
  * queue contains. That's the Right Way (TM) of drawing items on the screen,
  * because we need to draw the background first (and then add icons, text, ...
  * over it), but we only know the length of a background region once the state
- * corresponding to it is over, which happens to be at the next draw_before
+ * corresponding to it is over, which happens to be at the next before_schedchange
  * hook.
  *
  * We also have a hook called at the end of a chunk to draw the information left
@@ -45,6 +45,9 @@
  * line/background.
  */
 
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
 
 //#define PANGO_ENABLE_BACKEND
 #include <gtk/gtk.h>
 #include <ltt/event.h>
 #include <ltt/time.h>
 #include <ltt/type.h>
+#include <ltt/trace.h>
 
 #include <lttv/lttv.h>
 #include <lttv/hook.h>
 #include <lttv/state.h>
 #include <lttvwindow/lttvwindow.h>
 #include <lttvwindow/lttvwindowtraces.h>
+#include <lttvwindow/support.h>
 
 
 #include "eventhooks.h"
 #include "cfv.h"
 #include "processlist.h"
 #include "drawing.h"
-#include "cfv-private.h"
 
 
 #define MAX_PATH_LEN 256
 
-
-#if 0
-typedef struct _ProcessAddClosure {
-  ControlFlowData *cfd;
-  guint trace_num;
-} ProcessAddClosure;
-
-static void process_add(gpointer key,
-                        gpointer value,
-                        gpointer user_data)
-{
-  LttvProcessState *process = (LttvProcessState*)value;
-  ProcessAddClosure *closure = (ProcessAddClosure*)user_data;
-  ControlFlowData *control_flow_data = closure->cfd;
-  guint trace_num = closure->trace_num;
-
-  /* Add process to process list (if not present) */
-  guint pid;
-  LttTime birth;
-  guint y = 0, height = 0, pl_height = 0;
-
-  ProcessList *process_list =
-    guicontrolflow_get_process_list(control_flow_data);
-
-  pid = process->pid;
-  birth = process->creation_time;
-  const gchar *name = g_quark_to_string(process->name);
-  HashedProcessData *hashed_process_data = NULL;
-
-  if(processlist_get_process_pixels(process_list,
-          pid,
-          &birth,
-          trace_num,
-          &y,
-          &height,
-          &hashed_process_data) == 1)
-  {
-    /* Process not present */
-    processlist_add(process_list,
-        pid,
-        &birth,
-        trace_num,
-        name,
-        &pl_height,
-        &hashed_process_data);
-    processlist_get_process_pixels(process_list,
-            pid,
-            &birth,
-            trace_num,
-            &y,
-            &height,
-            &hashed_process_data);
-    drawing_insert_square( control_flow_data->drawing, y, height);
-  }
-}
-#endif //0
+extern GSList *g_legend_list;
 
 
 /* Action to do when background computation completed.
@@ -139,20 +88,21 @@ static void process_add(gpointer key,
  * Wait for all the awaited computations to be over.
  */
 
-gint background_ready(void *hook_data, void *call_data)
+static gint background_ready(void *hook_data, void *call_data)
 {
   ControlFlowData *control_flow_data = (ControlFlowData *)hook_data;
   LttvTrace *trace = (LttvTrace*)call_data;
-  LttvTracesetContext *tsc =
-        lttvwindow_get_traceset_context(control_flow_data->tab);
 
   control_flow_data->background_info_waiting--;
   
   if(control_flow_data->background_info_waiting == 0) {
-    g_debug("control flow viewer : background computation data ready.");
+    g_message("control flow viewer : background computation data ready.");
 
     drawing_clear(control_flow_data->drawing);
     processlist_clear(control_flow_data->process_list);
+    gtk_widget_set_size_request(
+      control_flow_data->drawing->drawing_area,
+                -1, processlist_get_height(control_flow_data->process_list));
     redraw_notify(control_flow_data, NULL);
   }
 
@@ -163,7 +113,7 @@ gint background_ready(void *hook_data, void *call_data)
 /* Request background computation. Verify if it is in progress or ready first.
  * Only for each trace in the tab's traceset.
  */
-void request_background_data(ControlFlowData *control_flow_data)
+static void request_background_data(ControlFlowData *control_flow_data)
 {
   LttvTracesetContext * tsc =
         lttvwindow_get_traceset_context(control_flow_data->tab);
@@ -188,9 +138,8 @@ void request_background_data(ControlFlowData *control_flow_data)
          * information. Happens when two viewers ask for it before servicing
          * starts.
          */
-        lttvwindowtraces_background_request_remove(trace, "state");
-        lttvwindowtraces_background_request_queue(trace,
-                                                  "state");
+        if(!lttvwindowtraces_background_request_find(trace, "state"))
+          lttvwindowtraces_background_request_queue(trace, "state");
         lttvwindowtraces_background_notify_queue(control_flow_data,
                                                  trace,
                                                  ltt_time_infinite,
@@ -206,7 +155,13 @@ void request_background_data(ControlFlowData *control_flow_data)
                                                    background_ready_hook);
         control_flow_data->background_info_waiting++;
       }
+    } else {
+      /* Data ready. Be its nature, this viewer doesn't need to have
+       * its data ready hook called htere, because a background
+       * request is always linked with a redraw.
+       */
     }
+    
   }
 
   lttv_hooks_destroy(background_ready_hook);
@@ -227,11 +182,10 @@ GtkWidget *
 h_guicontrolflow(Tab *tab)
 {
   g_info("h_guicontrolflow, %p", tab);
-  ControlFlowData *control_flow_data = guicontrolflow() ;
+  ControlFlowData *control_flow_data = guicontrolflow(tab) ;
   
   control_flow_data->tab = tab;
   
-  //g_debug("time width2 : %u",time_window->time_width);
   // Unreg done in the GuiControlFlow_Destructor
   lttvwindow_register_traceset_notify(tab,
         traceset_notify,
@@ -256,6 +210,46 @@ h_guicontrolflow(Tab *tab)
   
 }
 
+void legend_destructor(GtkWindow *legend)
+{
+  g_legend_list = g_slist_remove(g_legend_list, legend);
+}
+
+/* Create a popup legend */
+GtkWidget *
+h_legend(Tab *tab)
+{
+  g_info("h_legend, %p", tab);
+
+  GtkWindow *legend = GTK_WINDOW(gtk_window_new(GTK_WINDOW_TOPLEVEL));
+  g_legend_list = g_slist_append(
+      g_legend_list,
+      legend);
+  g_object_set_data_full(
+      G_OBJECT(legend),
+      "legend",
+      legend,
+      (GDestroyNotify)legend_destructor);
+  
+  gtk_window_set_title(legend, "Control Flow View Legend");
+
+  GtkWidget *pixmap = create_pixmap(GTK_WIDGET(legend), "lttv-color-list.png");
+  
+ // GtkImage *image = GTK_IMAGE(gtk_image_new_from_pixmap(
+ //                               GDK_PIXMAP(pixmap), NULL));
+  
+  gtk_container_add(GTK_CONTAINER(legend), GTK_WIDGET(pixmap));
+
+  gtk_widget_show(GTK_WIDGET(pixmap));
+  gtk_widget_show(GTK_WIDGET(legend));
+  
+
+  return NULL; /* This is a popup window */
+}
+
+
 int event_selected_hook(void *hook_data, void *call_data)
 {
   ControlFlowData *control_flow_data = (ControlFlowData*) hook_data;
@@ -263,10 +257,11 @@ int event_selected_hook(void *hook_data, void *call_data)
 
   g_debug("DEBUG : event selected by main window : %u", *event_number);
   
+  return 0;
 }
 
-
-static __inline PropertiesLine prepare_line(LttvProcessState *process)
+/* Function that selects the color of status&exemode line */
+static inline PropertiesLine prepare_s_e_line(LttvProcessState *process)
 {
   PropertiesLine prop_line;
   prop_line.line_width = 2;
@@ -274,36 +269,43 @@ static __inline PropertiesLine prepare_line(LttvProcessState *process)
   prop_line.y = MIDDLE;
   //GdkColormap *colormap = gdk_colormap_get_system();
   
-  g_debug("prepare_line for state : %s", g_quark_to_string(process->state->s));
-
-  /* color of line : status of the process */
-  if(process->state->s == LTTV_STATE_UNNAMED)
-    prop_line.color = drawing_colors[COL_WHITE];
-  else if(process->state->s == LTTV_STATE_WAIT_FORK)
-    prop_line.color = drawing_colors[COL_WAIT_FORK];
-  else if(process->state->s == LTTV_STATE_WAIT_CPU)
+  if(process->state->s == LTTV_STATE_RUN) {
+    if(process->state->t == LTTV_STATE_USER_MODE)
+      prop_line.color = drawing_colors[COL_RUN_USER_MODE];
+    else if(process->state->t == LTTV_STATE_SYSCALL)
+      prop_line.color = drawing_colors[COL_RUN_SYSCALL];
+    else if(process->state->t == LTTV_STATE_TRAP)
+      prop_line.color = drawing_colors[COL_RUN_TRAP];
+    else if(process->state->t == LTTV_STATE_IRQ)
+      prop_line.color = drawing_colors[COL_RUN_IRQ];
+    else if(process->state->t == LTTV_STATE_MODE_UNKNOWN)
+      prop_line.color = drawing_colors[COL_MODE_UNKNOWN];
+    else
+      g_assert(FALSE);   /* RUNNING MODE UNKNOWN */
+  } else if(process->state->s == LTTV_STATE_WAIT) {
+    /* We don't show if we wait while in user mode, trap, irq or syscall */
+    prop_line.color = drawing_colors[COL_WAIT];
+  } else if(process->state->s == LTTV_STATE_WAIT_CPU) {
+    /* We don't show if we wait for CPU while in user mode, trap, irq
+     * or syscall */
     prop_line.color = drawing_colors[COL_WAIT_CPU];
-  else if(process->state->s == LTTV_STATE_EXIT)
+  } else if(process->state->s == LTTV_STATE_ZOMBIE) {
+    prop_line.color = drawing_colors[COL_ZOMBIE];
+  } else if(process->state->s == LTTV_STATE_WAIT_FORK) {
+    prop_line.color = drawing_colors[COL_WAIT_FORK];
+  } else if(process->state->s == LTTV_STATE_EXIT) {
     prop_line.color = drawing_colors[COL_EXIT];
-  else if(process->state->s == LTTV_STATE_WAIT)
-    prop_line.color = drawing_colors[COL_WAIT];
-  else if(process->state->s == LTTV_STATE_RUN)
-    prop_line.color = drawing_colors[COL_RUN];
-  else
-    prop_line.color = drawing_colors[COL_WHITE];
-  //gdk_colormap_alloc_color(colormap,
-  //                         prop_line.color,
-  //                         FALSE,
-  //                         TRUE);
+  } else if(process->state->s == LTTV_STATE_UNNAMED) {
+    prop_line.color = drawing_colors[COL_UNNAMED];
+  } else
+    g_assert(FALSE);   /* UNKNOWN STATE */
   
   return prop_line;
 
 }
 
 
-
-/* draw_before_hook
+/* before_schedchange_hook
  * 
  * This function basically draw lines and icons. Two types of lines are drawn :
  * one small (3 pixels?) representing the state of the process and the second
@@ -321,138 +323,166 @@ static __inline PropertiesLine prepare_line(LttvProcessState *process)
  */
 
 
-int draw_before_hook(void *hook_data, void *call_data)
+int before_schedchange_hook(void *hook_data, void *call_data)
 {
-  EventsRequest *events_request = (EventsRequest*)hook_data;
+  LttvTraceHookByFacility *thf = (LttvTraceHookByFacility*)hook_data;
+  EventsRequest *events_request = (EventsRequest*)thf->hook_data;
   ControlFlowData *control_flow_data = events_request->viewer_data;
-  Drawing_t *drawing = control_flow_data->drawing;
 
   LttvTracefileContext *tfc = (LttvTracefileContext *)call_data;
 
   LttvTracefileState *tfs = (LttvTracefileState *)call_data;
-  LttvTraceState *ts =(LttvTraceState *)LTTV_TRACEFILE_CONTEXT(tfs)->t_context;
+  LttvTraceState *ts = (LttvTraceState *)tfc->t_context;
 
   LttEvent *e;
-  e = tfc->e;
+  e = ltt_tracefile_get_event(tfc->tf);
 
   LttTime evtime = ltt_event_time(e);
-  TimeWindow time_window = 
-    lttvwindow_get_time_window(control_flow_data->tab);
-
-  LttTime end_time = ltt_time_add(time_window.start_time,
-                                    time_window.time_width);
-
-  if(ltt_time_compare(evtime, time_window.start_time) == -1
-        || ltt_time_compare(evtime, end_time) == 1)
-            return;
-
-  guint width = drawing->width;
 
-  if(strcmp(ltt_eventtype_name(ltt_event_eventtype(e)),"schedchange") == 0) {
-
-    /* we are in a schedchange, before the state update. We must draw the
-     * items corresponding to the state before it changes : now is the right
-     * time to do it.
-     */
+  /* we are in a schedchange, before the state update. We must draw the
+   * items corresponding to the state before it changes : now is the right
+   * time to do it.
+   */
 
-    guint pid_out;
-    guint pid_in;
-    {
-      LttField *f = ltt_event_field(e);
-      LttField *element;
-      element = ltt_field_member(f,0);
-      pid_out = ltt_event_get_long_unsigned(e,element);
-      element = ltt_field_member(f,1);
-      pid_in = ltt_event_get_long_unsigned(e,element);
-      g_debug("out : %u  in : %u", pid_out, pid_in);
-    }
+  guint pid_out;
+  guint pid_in;
+  {
+    pid_out = ltt_event_get_long_unsigned(e, thf->f1);
+    pid_in = ltt_event_get_long_unsigned(e, thf->f2);
+  }
+  
+  { 
+    /* For the pid_out */
+    /* First, check if the current process is in the state computation
+     * process list. If it is there, that means we must add it right now and
+     * draw items from the beginning of the read for it. If it is not
+     * present, it's a new process and it was not present : it will
+     * be added after the state update.  */
+    guint cpu = ltt_tracefile_num(tfc->tf);
+    LttvProcessState *process = ts->running_process[cpu];
+    /* unknown state, bad current pid */
+    if(process->pid != pid_out)
+      process = lttv_state_find_process(ts,
+          ltt_tracefile_num(tfc->tf), pid_out);
     
-    { 
-      /* For the pid_out */
-      /* First, check if the current process is in the state computation
-       * process list. If it is there, that means we must add it right now and
-       * draw items from the beginning of the read for it. If it is not
-       * present, it's a new process and it was not present : it will
-       * be added after the state update.  */
-      LttvProcessState *process;
-      process = lttv_state_find_process(tfs, pid_out);
+    if(process != NULL) {
+      /* Well, the process_out existed : we must get it in the process hash
+       * or add it, and draw its items.
+       */
+       /* Add process to process list (if not present) */
+      guint pl_height = 0;
+      HashedProcessData *hashed_process_data = NULL;
+      ProcessList *process_list = control_flow_data->process_list;
+      LttTime birth = process->creation_time;
       
-      if(process != NULL) {
-        /* Well, the process_out existed : we must get it in the process hash
-         * or add it, and draw its items.
-         */
-         /* Add process to process list (if not present) */
-        guint y = 0, height = 0, pl_height = 0;
-        HashedProcessData *hashed_process_data = NULL;
-        ProcessList *process_list = 
-                        guicontrolflow_get_process_list(control_flow_data);
-        LttTime birth = process->creation_time;
-        const gchar *name = g_quark_to_string(process->name);
-        
-        if(processlist_get_process_pixels(process_list,
-                pid_out,
-                &birth,
-                tfc->t_context->index,
-                &y,
-                &height,
-                &hashed_process_data) == 1)
-        {
-          g_assert(!(process->pid == 432 && 
-                        ltt_time_compare(process->creation_time,
-                                         ltt_time_zero)==0));
-
-          g_assert(!(process->pid == 432 && 
-                        process->creation_time.tv_nsec == 47797905));
-          /* Process not present */
-          processlist_add(process_list,
+      hashed_process_data = processlist_get_process_data(process_list,
               pid_out,
+              process->cpu,
               &birth,
-              tfc->t_context->index,
-              name,
-              &pl_height,
-              &hashed_process_data);
-          processlist_get_process_pixels(process_list,
-                  pid_out,
-                  &birth,
-                  tfc->t_context->index,
-                  &y,
-                  &height,
-                  &hashed_process_data);
-          drawing_insert_square( drawing, y, height);
-        }
+              tfc->t_context->index);
+      if(hashed_process_data == NULL)
+      {
+        g_assert(pid_out == 0 || pid_out != process->ppid);
+        /* Process not present */
+        ProcessInfo *process_info;
+        Drawing_t *drawing = control_flow_data->drawing;
+        processlist_add(process_list,
+            drawing,
+            pid_out,
+            process->cpu,
+            process->ppid,
+            &birth,
+            tfc->t_context->index,
+            process->name,
+            &pl_height,
+            &process_info,
+            &hashed_process_data);
+        gtk_widget_set_size_request(drawing->drawing_area,
+                                    -1,
+                                    pl_height);
+        gtk_widget_queue_draw(drawing->drawing_area);
+
+      }
+  
+      /* Now, the process is in the state hash and our own process hash.
+       * We definitely can draw the items related to the ending state.
+       */
       
-        /* Now, the process is in the state hash and our own process hash.
-         * We definitely can draw the items related to the ending state.
-         */
-        
-        /* Check if the x position is unset. In can have been left unset by
-         * a draw closure from a after chunk hook. This should never happen,
-         * because it must be set by before chunk hook to the damage_begin
-         * value.
-         */
-        g_assert(hashed_process_data->x != -1);
-        {
+      if(ltt_time_compare(hashed_process_data->next_good_time,
+                          evtime) > 0)
+      {
+        if(hashed_process_data->x.middle_marked == FALSE) {
+    
+          TimeWindow time_window = 
+            lttvwindow_get_time_window(control_flow_data->tab);
+#ifdef EXTRA_CHECK
+          if(ltt_time_compare(evtime, time_window.start_time) == -1
+                || ltt_time_compare(evtime, time_window.end_time) == 1)
+                    return;
+#endif //EXTRA_CHECK
+          Drawing_t *drawing = control_flow_data->drawing;
+          guint width = drawing->width;
           guint x;
-          DrawContext draw_context;
-
           convert_time_to_pixels(
-              time_window.start_time,
-              end_time,
-              evtime,
-              width,
-              &x);
+                    time_window,
+                    evtime,
+                    width,
+                    &x);
+
+          /* Draw collision indicator */
+          gdk_gc_set_foreground(drawing->gc, &drawing_colors[COL_WHITE]);
+          gdk_draw_point(hashed_process_data->pixmap,
+                         drawing->gc,
+                         x,
+                         (hashed_process_data->height/2)-3);
+          hashed_process_data->x.middle_marked = TRUE;
+        }
+      } else {
+        TimeWindow time_window = 
+          lttvwindow_get_time_window(control_flow_data->tab);
+#ifdef EXTRA_CHECK
+        if(ltt_time_compare(evtime, time_window.start_time) == -1
+              || ltt_time_compare(evtime, time_window.end_time) == 1)
+                  return;
+#endif //EXTRA_CHECK
+        Drawing_t *drawing = control_flow_data->drawing;
+        guint width = drawing->width;
+        guint x;
+        convert_time_to_pixels(
+                  time_window,
+                  evtime,
+                  width,
+                  &x);
+
+
+        /* Jump over draw if we are at the same x position */
+        if(x == hashed_process_data->x.middle &&
+             hashed_process_data->x.middle_used)
+        {
+          if(hashed_process_data->x.middle_marked == FALSE) {
+            /* Draw collision indicator */
+            gdk_gc_set_foreground(drawing->gc, &drawing_colors[COL_WHITE]);
+            gdk_draw_point(hashed_process_data->pixmap,
+                           drawing->gc,
+                           x,
+                           (hashed_process_data->height/2)-3);
+            hashed_process_data->x.middle_marked = TRUE;
+          }
+          /* jump */
+        } else {
+          DrawContext draw_context;
 
           /* Now create the drawing context that will be used to draw
            * items related to the last state. */
-          draw_context.drawable = drawing->pixmap;
+          draw_context.drawable = hashed_process_data->pixmap;
           draw_context.gc = drawing->gc;
           draw_context.pango_layout = drawing->pango_layout;
-          draw_context.drawinfo.start.x = hashed_process_data->x;
+          draw_context.drawinfo.start.x = hashed_process_data->x.middle;
           draw_context.drawinfo.end.x = x;
 
-          draw_context.drawinfo.y.over = y;
-          draw_context.drawinfo.y.middle = y+(height/4);
-          draw_context.drawinfo.y.under = y+(height/2)+2;
+          draw_context.drawinfo.y.over = 1;
+          draw_context.drawinfo.y.middle = (hashed_process_data->height/2);
+          draw_context.drawinfo.y.under = hashed_process_data->height;
 
           draw_context.drawinfo.start.offset.over = 0;
           draw_context.drawinfo.start.offset.middle = 0;
@@ -463,96 +493,155 @@ int draw_before_hook(void *hook_data, void *call_data)
 
           {
             /* Draw the line */
-            PropertiesLine prop_line = prepare_line(process);
+            PropertiesLine prop_line = prepare_s_e_line(process);
             draw_line((void*)&prop_line, (void*)&draw_context);
 
           }
           /* become the last x position */
-          hashed_process_data->x = x;
+          hashed_process_data->x.middle = x;
+          hashed_process_data->x.middle_used = TRUE;
+          hashed_process_data->x.middle_marked = FALSE;
+
+          /* Calculate the next good time */
+          convert_pixels_to_time(width, x+1, time_window,
+                                 &hashed_process_data->next_good_time);
         }
       }
     }
+  }
 
-    {
-      /* For the pid_in */
-      /* First, check if the current process is in the state computation
-       * process list. If it is there, that means we must add it right now and
-       * draw items from the beginning of the read for it. If it is not
-       * present, it's a new process and it was not present : it will
-       * be added after the state update.  */
-      LttvProcessState *process;
-      process = lttv_state_find_process(tfs, pid_in);
+  {
+    /* For the pid_in */
+    /* First, check if the current process is in the state computation
+     * process list. If it is there, that means we must add it right now and
+     * draw items from the beginning of the read for it. If it is not
+     * present, it's a new process and it was not present : it will
+     * be added after the state update.  */
+    LttvProcessState *process;
+    process = lttv_state_find_process(ts,
+        ltt_tracefile_num(tfc->tf), pid_in);
+    
+    if(process != NULL) {
+      /* Well, the process existed : we must get it in the process hash
+       * or add it, and draw its items.
+       */
+       /* Add process to process list (if not present) */
+      guint pl_height = 0;
+      HashedProcessData *hashed_process_data = NULL;
+      ProcessList *process_list = control_flow_data->process_list;
+      LttTime birth = process->creation_time;
       
-      if(process != NULL) {
-        /* Well, the process_out existed : we must get it in the process hash
-         * or add it, and draw its items.
-         */
-         /* Add process to process list (if not present) */
-        guint y = 0, height = 0, pl_height = 0;
-        HashedProcessData *hashed_process_data = NULL;
-        ProcessList *process_list = 
-                        guicontrolflow_get_process_list(control_flow_data);
-        LttTime birth = process->creation_time;
-        const gchar *name = g_quark_to_string(process->name);
-        
-        if(processlist_get_process_pixels(process_list,
-                pid_in,
-                &birth,
-                tfc->t_context->index,
-                &y,
-                &height,
-                &hashed_process_data) == 1)
-        {
-          /* Process not present */
-          processlist_add(process_list,
+      hashed_process_data = processlist_get_process_data(process_list,
               pid_in,
+              ltt_tracefile_num(tfc->tf),
               &birth,
-              tfc->t_context->index,
-              name,
-              &pl_height,
-              &hashed_process_data);
-          processlist_get_process_pixels(process_list,
-                  pid_in,
-                  &birth,
-                  tfc->t_context->index,
-                  &y,
-                  &height,
-                  &hashed_process_data);
-          drawing_insert_square( drawing, y, height);
-        }
+              tfc->t_context->index);
+      if(hashed_process_data == NULL)
+      {
+        g_assert(pid_in == 0 || pid_in != process->ppid);
+        /* Process not present */
+        ProcessInfo *process_info;
+        Drawing_t *drawing = control_flow_data->drawing;
+        processlist_add(process_list,
+            drawing,
+            pid_in,
+            ltt_tracefile_num(tfc->tf),
+            process->ppid,
+            &birth,
+            tfc->t_context->index,
+            process->name,
+            &pl_height,
+            &process_info,
+            &hashed_process_data);
+        gtk_widget_set_size_request(drawing->drawing_area,
+                                    -1,
+                                    pl_height);
+        gtk_widget_queue_draw(drawing->drawing_area);
+
+      }
+      //We could set the current process and hash here, but will be done
+      //by after schedchange hook
+    
+      /* Now, the process is in the state hash and our own process hash.
+       * We definitely can draw the items related to the ending state.
+       */
       
-        /* Now, the process is in the state hash and our own process hash.
-         * We definitely can draw the items related to the ending state.
-         */
-        
-        /* Check if the x position is unset. In can have been left unset by
-         * a draw closure from a after chunk hook. This should never happen,
-         * because it must be set by before chunk hook to the damage_begin
-         * value.
-         */
-        g_assert(hashed_process_data->x != -1);
-        {
-          guint x;
-          DrawContext draw_context;
+      if(ltt_time_compare(hashed_process_data->next_good_time,
+                          evtime) > 0)
+      {
+        if(hashed_process_data->x.middle_marked == FALSE) {
 
+          TimeWindow time_window = 
+            lttvwindow_get_time_window(control_flow_data->tab);
+#ifdef EXTRA_CHECK
+          if(ltt_time_compare(evtime, time_window.start_time) == -1
+                || ltt_time_compare(evtime, time_window.end_time) == 1)
+                    return;
+#endif //EXTRA_CHECK
+          Drawing_t *drawing = control_flow_data->drawing;
+          guint width = drawing->width;
+          guint x;
           convert_time_to_pixels(
-              time_window.start_time,
-              end_time,
-              evtime,
-              width,
-              &x);
+                    time_window,
+                    evtime,
+                    width,
+                    &x);
+
+          /* Draw collision indicator */
+          gdk_gc_set_foreground(drawing->gc, &drawing_colors[COL_WHITE]);
+          gdk_draw_point(hashed_process_data->pixmap,
+                         drawing->gc,
+                         x,
+                         (hashed_process_data->height/2)-3);
+          hashed_process_data->x.middle_marked = TRUE;
+        }
+      } else {
+        TimeWindow time_window = 
+          lttvwindow_get_time_window(control_flow_data->tab);
+#ifdef EXTRA_CHECK
+        if(ltt_time_compare(evtime, time_window.start_time) == -1
+              || ltt_time_compare(evtime, time_window.end_time) == 1)
+                  return;
+#endif //EXTRA_CHECK
+        Drawing_t *drawing = control_flow_data->drawing;
+        guint width = drawing->width;
+        guint x;
+
+        convert_time_to_pixels(
+                  time_window,
+                  evtime,
+                  width,
+                  &x);
+
+
+        /* Jump over draw if we are at the same x position */
+        if(x == hashed_process_data->x.middle &&
+            hashed_process_data->x.middle_used)
+        {
+          if(hashed_process_data->x.middle_marked == FALSE) {
+            /* Draw collision indicator */
+            gdk_gc_set_foreground(drawing->gc, &drawing_colors[COL_WHITE]);
+            gdk_draw_point(hashed_process_data->pixmap,
+                           drawing->gc,
+                           x,
+                           (hashed_process_data->height/2)-3);
+            hashed_process_data->x.middle_marked = TRUE;
+          }
+          /* jump */
+        } else {
+          DrawContext draw_context;
 
           /* Now create the drawing context that will be used to draw
            * items related to the last state. */
-          draw_context.drawable = drawing->pixmap;
+          draw_context.drawable = hashed_process_data->pixmap;
           draw_context.gc = drawing->gc;
           draw_context.pango_layout = drawing->pango_layout;
-          draw_context.drawinfo.start.x = hashed_process_data->x;
+          draw_context.drawinfo.start.x = hashed_process_data->x.middle;
           draw_context.drawinfo.end.x = x;
 
-          draw_context.drawinfo.y.over = y;
-          draw_context.drawinfo.y.middle = y+(height/4);
-          draw_context.drawinfo.y.under = y+(height/2)+2;
+          draw_context.drawinfo.y.over = 1;
+          draw_context.drawinfo.y.middle = (hashed_process_data->height/2);
+          draw_context.drawinfo.y.under = hashed_process_data->height;
 
           draw_context.drawinfo.start.offset.over = 0;
           draw_context.drawinfo.start.offset.middle = 0;
@@ -563,1213 +652,1051 @@ int draw_before_hook(void *hook_data, void *call_data)
 
           {
             /* Draw the line */
-            PropertiesLine prop_line = prepare_line(process);
+            PropertiesLine prop_line = prepare_s_e_line(process);
             draw_line((void*)&prop_line, (void*)&draw_context);
           }
 
           
           /* become the last x position */
-          hashed_process_data->x = x;
+          hashed_process_data->x.middle = x;
+          hashed_process_data->x.middle_used = TRUE;
+          hashed_process_data->x.middle_marked = FALSE;
+
+          /* Calculate the next good time */
+          convert_pixels_to_time(width, x+1, time_window,
+                                 &hashed_process_data->next_good_time);
         }
       }
-    }
-  } else if(strcmp(
-          ltt_eventtype_name(ltt_event_eventtype(e)),"process") == 0) {
-    /* We are in a fork or exit event */
+    } else
+      g_warning("Cannot find pin_in in schedchange %u", pid_in);
+  }
+  return 0;
+
+
 
 
+  /* Text dump */
+#ifdef DONTSHOW
+  GString *string = g_string_new("");;
+  gboolean field_names = TRUE, state = TRUE;
+
+  lttv_event_to_string(e, tfc->tf, string, TRUE, field_names, tfs);
+  g_string_append_printf(string,"\n");  
+
+  if(state) {
+    g_string_append_printf(string, " %s",
+        g_quark_to_string(tfs->process->state->s));
   }
 
+  g_info("%s",string->str);
+
+  g_string_free(string, TRUE);
   
-  return 0;
+  /* End of text dump */
+#endif //DONTSHOW
 
+}
 
-#if 0
-  EventsRequest *events_request = (EventsRequest*)hook_data;
-  ControlFlowData *control_flow_data = 
-                      (ControlFlowData*)events_request->viewer_data;
-  Tab *tab = control_flow_data->tab;
+/* after_schedchange_hook
+ * 
+ * The draw after hook is called by the reading API to have a
+ * particular event drawn on the screen.
+ * @param hook_data ControlFlowData structure of the viewer. 
+ * @param call_data Event context.
+ *
+ * This function adds items to be drawn in a queue for each process.
+ * 
+ */
+int after_schedchange_hook(void *hook_data, void *call_data)
+{
+  LttvTraceHookByFacility *thf = (LttvTraceHookByFacility*)hook_data;
+  EventsRequest *events_request = (EventsRequest*)thf->hook_data;
+  ControlFlowData *control_flow_data = events_request->viewer_data;
 
   LttvTracefileContext *tfc = (LttvTracefileContext *)call_data;
 
   LttvTracefileState *tfs = (LttvTracefileState *)call_data;
-  LttvTraceState *ts =(LttvTraceState *)LTTV_TRACEFILE_CONTEXT(tfs)->t_context;
-  
+
+  LttvTraceState *ts = (LttvTraceState *)tfc->t_context;
+
   LttEvent *e;
-  e = tfc->e;
+  e = ltt_tracefile_get_event(tfc->tf);
 
   LttTime evtime = ltt_event_time(e);
-  TimeWindow time_window = 
-    lttvwindow_get_time_window(tab);
 
-  LttTime end_time = ltt_time_add(time_window.start_time,
-                                    time_window.time_width);
-  //if(time < time_beg || time > time_end) return;
-  if(ltt_time_compare(evtime, time_window.start_time) == -1
-        || ltt_time_compare(evtime, end_time) == 1)
-            return;
+  /* Add process to process list (if not present) */
+  LttvProcessState *process_in;
+  LttTime birth;
+  guint pl_height = 0;
+  HashedProcessData *hashed_process_data_in = NULL;
 
-  if(strcmp(ltt_eventtype_name(ltt_event_eventtype(e)),"schedchange") == 0)
+  ProcessList *process_list = control_flow_data->process_list;
+  
+  guint pid_in;
   {
-    g_debug("schedchange!");
-    
-    /* Add process to process list (if not present) and get drawing "y" from
-     * process position */
-    guint pid_out, pid_in;
-    LttvProcessState *process_out, *process_in;
-    LttTime birth;
-    guint y_in = 0, y_out = 0, height = 0, pl_height = 0;
-
-    ProcessList *process_list =
-      guicontrolflow_get_process_list(control_flow_data);
-
-
-    LttField *f = ltt_event_field(e);
-    LttField *element;
-    element = ltt_field_member(f,0);
-    pid_out = ltt_event_get_long_unsigned(e,element);
-    element = ltt_field_member(f,1);
-    pid_in = ltt_event_get_long_unsigned(e,element);
-    g_debug("out : %u  in : %u", pid_out, pid_in);
-
+    guint pid_out;
+    pid_out = ltt_event_get_long_unsigned(e, thf->f1);
+    pid_in = ltt_event_get_long_unsigned(e, thf->f2);
+  }
 
-    /* Find process pid_out in the list... */
-    process_out = lttv_state_find_process(tfs, pid_out);
-    if(process_out == NULL) return 0;
-    g_debug("out : %s",g_quark_to_string(process_out->state->s));
-    
-    birth = process_out->creation_time;
-    const gchar *name = g_quark_to_string(process_out->name);
-    HashedProcessData *hashed_process_data_out = NULL;
 
-    if(processlist_get_process_pixels(process_list,
-            pid_out,
-            &birth,
-            tfc->t_context->index,
-            &y_out,
-            &height,
-            &hashed_process_data_out) == 1)
-    {
-      /* Process not present */
-      processlist_add(process_list,
-          pid_out,
+  /* Find process pid_in in the list... */
+  //process_in = lttv_state_find_process(ts, ANY_CPU, pid_in);
+  //process_in = tfs->process;
+  guint cpu = ltt_tracefile_num(tfc->tf);
+  process_in = ts->running_process[cpu];
+  /* It should exist, because we are after the state update. */
+#ifdef EXTRA_CHECK
+  g_assert(process_in != NULL);
+#endif //EXTRA_CHECK
+  birth = process_in->creation_time;
+
+  hashed_process_data_in = processlist_get_process_data(process_list,
+          pid_in,
+          process_in->cpu,
           &birth,
-          tfc->t_context->index,
-          name,
-          &pl_height,
-          &hashed_process_data_out);
-      g_assert(processlist_get_process_pixels(process_list,
-              pid_out,
-              &birth,
-              tfc->t_context->index,
-              &y_out,
-              &height,
-              &hashed_process_data_out)==0);
-      drawing_insert_square( control_flow_data->drawing, y_out, height);
-    }
-    //g_free(name);
-    
-    /* Find process pid_in in the list... */
-    process_in = lttv_state_find_process(tfs, pid_in);
-    if(process_in == NULL) return 0;
-    g_debug("in : %s",g_quark_to_string(process_in->state->s));
-
-    birth = process_in->creation_time;
-    name = g_quark_to_string(process_in->name);
-    HashedProcessData *hashed_process_data_in = NULL;
-
-    if(processlist_get_process_pixels(process_list,
-            pid_in,
-            &birth,
-            tfc->t_context->index,
-            &y_in,
-            &height,
-            &hashed_process_data_in) == 1)
-    {
-      /* Process not present */
-      processlist_add(process_list,
+          tfc->t_context->index);
+  if(hashed_process_data_in == NULL)
+  {
+    g_assert(pid_in == 0 || pid_in != process_in->ppid);
+    ProcessInfo *process_info;
+    Drawing_t *drawing = control_flow_data->drawing;
+    /* Process not present */
+    processlist_add(process_list,
+        drawing,
         pid_in,
+        process_in->cpu,
+        process_in->ppid,
         &birth,
         tfc->t_context->index,
-        name,
+        process_in->name,
         &pl_height,
+        &process_info,
         &hashed_process_data_in);
-      processlist_get_process_pixels(process_list,
-            pid_in,
-            &birth,
-            tfc->t_context->index,
-            &y_in,
-            &height,
-            &hashed_process_data_in);
-
-      drawing_insert_square( control_flow_data->drawing, y_in, height);
-    }
-    //g_free(name);
-
+        gtk_widget_set_size_request(drawing->drawing_area,
+                                    -1,
+                                    pl_height);
+        gtk_widget_queue_draw(drawing->drawing_area);
+  }
+  /* Set the current process */
+  process_list->current_hash_data[process_in->cpu] =
+                                             hashed_process_data_in;
 
-    /* Find pixels corresponding to time of the event. If the time does
-     * not fit in the window, show a warning, not supposed to happend. */
-    guint x = 0;
-    guint width = control_flow_data->drawing->width;
-
-    LttTime time = ltt_event_time(e);
-
-    LttTime window_end = ltt_time_add(time_window.time_width,
-                          time_window.start_time);
+  if(ltt_time_compare(hashed_process_data_in->next_good_time,
+                          evtime) <= 0)
+  {
+    TimeWindow time_window = 
+    lttvwindow_get_time_window(control_flow_data->tab);
 
+#ifdef EXTRA_CHECK
+    if(ltt_time_compare(evtime, time_window.start_time) == -1
+        || ltt_time_compare(evtime, time_window.end_time) == 1)
+            return;
+#endif //EXTRA_CHECK
+    Drawing_t *drawing = control_flow_data->drawing;
+    guint width = drawing->width;
+    guint new_x;
     
     convert_time_to_pixels(
-        time_window.start_time,
-        window_end,
-        time,
+        time_window,
+        evtime,
         width,
-        &x);
-    //assert(x <= width);
-    //
-    /* draw what represents the event for outgoing process. */
-
-    DrawContext *draw_context_out = hashed_process_data_out->draw_context;
-    draw_context_out->current->modify_over->x = x;
-    draw_context_out->current->modify_under->x = x;
-    draw_context_out->current->modify_over->y = y_out;
-    draw_context_out->current->modify_under->y = y_out+(height/2)+2;
-    draw_context_out->drawable = control_flow_data->drawing->pixmap;
-    draw_context_out->pango_layout = control_flow_data->drawing->pango_layout;
-    GtkWidget *widget = control_flow_data->drawing->drawing_area;
-    //draw_context_out->gc = widget->style->fg_gc[GTK_WIDGET_STATE (widget)];
-    //draw_context_out->gc = gdk_gc_new(control_flow_data->drawing->pixmap);
-    //gdk_gc_copy(draw_context_out->gc, widget->style->black_gc);
-    //draw_context_out->gc = widget->style->black_gc;
-    
-    //draw_arc((void*)&prop_arc, (void*)draw_context_out);
-    //test_draw_item(control_flow_data->drawing, control_flow_data->drawing->pixmap);
-    
-    /* Draw the line/background of the out process */
-    if(draw_context_out->previous->middle->x == -1)
-    {
-      draw_context_out->previous->over->x =
-                            control_flow_data->drawing->damage_begin;
-      draw_context_out->previous->middle->x = 
-                            control_flow_data->drawing->damage_begin;
-      draw_context_out->previous->under->x =
-                            control_flow_data->drawing->damage_begin;
-
-      g_debug("out middle x_beg : %u",control_flow_data->drawing->damage_begin);
-    }
-  
-    draw_context_out->current->middle->x = x;
-    draw_context_out->current->over->x = x;
-    draw_context_out->current->under->x = x;
-    draw_context_out->current->middle->y = y_out + height/2;
-    draw_context_out->current->over->y = y_out;
-    draw_context_out->current->under->y = y_out + height;
-    draw_context_out->previous->middle->y = y_out + height/2;
-    draw_context_out->previous->over->y = y_out;
-    draw_context_out->previous->under->y = y_out + height;
-
-    draw_context_out->drawable = control_flow_data->drawing->pixmap;
-    draw_context_out->pango_layout = control_flow_data->drawing->pango_layout;
-
-    if(process_out->state->s == LTTV_STATE_RUN)
-    {
-      //draw_context_out->gc = gdk_gc_new(control_flow_data->drawing->pixmap);
-      //gdk_gc_copy(draw_context_out->gc, widget->style->black_gc);
-      draw_context_out->gc = control_flow_data->drawing->gc;
+        &new_x);
 
-      PropertiesBG prop_bg;
-      prop_bg.color = g_new(GdkColor,1);
-      
-      switch(tfc->index) {
-        case 0:
-          prop_bg.color->red = 0x1515;
-          prop_bg.color->green = 0x1515;
-          prop_bg.color->blue = 0x8c8c;
-          break;
-        case 1:
-          prop_bg.color->red = 0x4e4e;
-          prop_bg.color->green = 0xa9a9;
-          prop_bg.color->blue = 0xa4a4;
-          break;
-        case 2:
-          prop_bg.color->red = 0x7a7a;
-          prop_bg.color->green = 0x4a4a;
-          prop_bg.color->blue = 0x8b8b;
-          break;
-        case 3:
-          prop_bg.color->red = 0x8080;
-          prop_bg.color->green = 0x7777;
-          prop_bg.color->blue = 0x4747;
-          break;
-        default:
-          prop_bg.color->red = 0xe7e7;
-          prop_bg.color->green = 0xe7e7;
-          prop_bg.color->blue = 0xe7e7;
-      }
-      
-      g_debug("calling from draw_event");
-      draw_bg((void*)&prop_bg, (void*)draw_context_out);
-      g_free(prop_bg.color);
-      //gdk_gc_unref(draw_context_out->gc);
+    if(hashed_process_data_in->x.middle != new_x) {
+      hashed_process_data_in->x.middle = new_x;
+      hashed_process_data_in->x.middle_used = FALSE;
+      hashed_process_data_in->x.middle_marked = FALSE;
     }
+  }
+  return 0;
+}
 
-    draw_context_out->gc = widget->style->black_gc;
 
-    GdkColor colorfg_out = { 0, 0xffff, 0x0000, 0x0000 };
-    GdkColor colorbg_out = { 0, 0x0000, 0x0000, 0x0000 };
-    PropertiesText prop_text_out;
-    prop_text_out.foreground = &colorfg_out;
-    prop_text_out.background = &colorbg_out;
-    prop_text_out.size = 6;
-    prop_text_out.position = OVER;
 
-    /* color of text : status of the process */
-    if(process_out->state->s == LTTV_STATE_UNNAMED)
-    {
-      prop_text_out.foreground->red = 0xffff;
-      prop_text_out.foreground->green = 0xffff;
-      prop_text_out.foreground->blue = 0xffff;
-    }
-    else if(process_out->state->s == LTTV_STATE_WAIT_FORK)
-    {
-      prop_text_out.foreground->red = 0x0fff;
-      prop_text_out.foreground->green = 0xffff;
-      prop_text_out.foreground->blue = 0xfff0;
-    }
-    else if(process_out->state->s == LTTV_STATE_WAIT_CPU)
-    {
-      prop_text_out.foreground->red = 0xffff;
-      prop_text_out.foreground->green = 0xffff;
-      prop_text_out.foreground->blue = 0x0000;
-    }
-    else if(process_out->state->s == LTTV_STATE_EXIT)
-    {
-      prop_text_out.foreground->red = 0xffff;
-      prop_text_out.foreground->green = 0x0000;
-      prop_text_out.foreground->blue = 0xffff;
-    }
-    else if(process_out->state->s == LTTV_STATE_WAIT)
-    {
-      prop_text_out.foreground->red = 0xffff;
-      prop_text_out.foreground->green = 0x0000;
-      prop_text_out.foreground->blue = 0x0000;
-    }
-    else if(process_out->state->s == LTTV_STATE_RUN)
-    {
-      prop_text_out.foreground->red = 0x0000;
-      prop_text_out.foreground->green = 0xffff;
-      prop_text_out.foreground->blue = 0x0000;
-    }
-    else
-    {
-      prop_text_out.foreground->red = 0xffff;
-      prop_text_out.foreground->green = 0xffff;
-      prop_text_out.foreground->blue = 0xffff;
-    }
-    
-    /* Print status of the process : U, WF, WC, E, W, R */
-    if(process_out->state->s == LTTV_STATE_UNNAMED)
-      prop_text_out.text = "U->";
-    else if(process_out->state->s == LTTV_STATE_WAIT_FORK)
-      prop_text_out.text = "WF->";
-    else if(process_out->state->s == LTTV_STATE_WAIT_CPU)
-      prop_text_out.text = "WC->";
-    else if(process_out->state->s == LTTV_STATE_EXIT)
-      prop_text_out.text = "E->";
-    else if(process_out->state->s == LTTV_STATE_WAIT)
-      prop_text_out.text = "W->";
-    else if(process_out->state->s == LTTV_STATE_RUN)
-      prop_text_out.text = "R->";
-    else
-      prop_text_out.text = "U";
-    
-    draw_text((void*)&prop_text_out, (void*)draw_context_out);
-    //gdk_gc_unref(draw_context_out->gc);
-
-    //draw_context_out->gc = gdk_gc_new(control_flow_data->drawing->pixmap);
-    //gdk_gc_copy(draw_context_out->gc, widget->style->black_gc);
-    draw_context_out->gc = control_flow_data->drawing->gc;
-
-    PropertiesLine prop_line_out;
-    prop_line_out.color = g_new(GdkColor,1);
-    prop_line_out.line_width = 2;
-    prop_line_out.style = GDK_LINE_SOLID;
-    prop_line_out.position = MIDDLE;
-    
-    g_debug("out state : %s", g_quark_to_string(process_out->state->s));
 
-    /* color of line : status of the process */
-    if(process_out->state->s == LTTV_STATE_UNNAMED)
-    {
-      prop_line_out.color->red = 0xffff;
-      prop_line_out.color->green = 0xffff;
-      prop_line_out.color->blue = 0xffff;
-    }
-    else if(process_out->state->s == LTTV_STATE_WAIT_FORK)
-    {
-      prop_line_out.color->red = 0x0fff;
-      prop_line_out.color->green = 0xffff;
-      prop_line_out.color->blue = 0xfff0;
-    }
-    else if(process_out->state->s == LTTV_STATE_WAIT_CPU)
-    {
-      prop_line_out.color->red = 0xffff;
-      prop_line_out.color->green = 0xffff;
-      prop_line_out.color->blue = 0x0000;
-    }
-    else if(process_out->state->s == LTTV_STATE_EXIT)
-    {
-      prop_line_out.color->red = 0xffff;
-      prop_line_out.color->green = 0x0000;
-      prop_line_out.color->blue = 0xffff;
-    }
-    else if(process_out->state->s == LTTV_STATE_WAIT)
-    {
-      prop_line_out.color->red = 0xffff;
-      prop_line_out.color->green = 0x0000;
-      prop_line_out.color->blue = 0x0000;
-    }
-    else if(process_out->state->s == LTTV_STATE_RUN)
+/* before_execmode_hook
+ * 
+ * This function basically draw lines and icons. Two types of lines are drawn :
+ * one small (3 pixels?) representing the state of the process and the second
+ * type is thicker (10 pixels?) representing on which CPU a process is running
+ * (and this only in running state).
+ *
+ * Extremums of the lines :
+ * x_min : time of the last event context for this process kept in memory.
+ * x_max : time of the current event.
+ * y : middle of the process in the process list. The process is found in the
+ * list, therefore is it's position in pixels.
+ *
+ * The choice of lines'color is defined by the context of the last event for this
+ * process.
+ */
+
+
+int before_execmode_hook(void *hook_data, void *call_data)
+{
+  LttvTraceHookByFacility *thf = (LttvTraceHookByFacility*)hook_data;
+  EventsRequest *events_request = (EventsRequest*)thf->hook_data;
+  ControlFlowData *control_flow_data = events_request->viewer_data;
+
+  LttvTracefileContext *tfc = (LttvTracefileContext *)call_data;
+
+  LttvTracefileState *tfs = (LttvTracefileState *)call_data;
+
+  LttvTraceState *ts = (LttvTraceState *)tfc->t_context;
+
+  LttEvent *e;
+  e = ltt_tracefile_get_event(tfc->tf);
+
+  LttTime evtime = ltt_event_time(e);
+
+  /* we are in a execmode, before the state update. We must draw the
+   * items corresponding to the state before it changes : now is the right
+   * time to do it.
+   */
+  /* For the pid */
+  //LttvProcessState *process = tfs->process;
+  guint cpu = ltt_tracefile_num(tfc->tf);
+  LttvProcessState *process = ts->running_process[cpu];
+  g_assert(process != NULL);
+
+  guint pid = process->pid;
+
+  /* Well, the process_out existed : we must get it in the process hash
+   * or add it, and draw its items.
+   */
+   /* Add process to process list (if not present) */
+  guint pl_height = 0;
+  HashedProcessData *hashed_process_data = NULL;
+  ProcessList *process_list = control_flow_data->process_list;
+  LttTime birth = process->creation_time;
+  if(likely(process_list->current_hash_data[cpu] != NULL)) {
+    hashed_process_data = process_list->current_hash_data[cpu];
+  } else {
+    hashed_process_data = processlist_get_process_data(process_list,
+            pid,
+            process->cpu,
+            &birth,
+            tfc->t_context->index);
+    if(unlikely(hashed_process_data == NULL))
     {
-      prop_line_out.color->red = 0x0000;
-      prop_line_out.color->green = 0xffff;
-      prop_line_out.color->blue = 0x0000;
+      g_assert(pid == 0 || pid != process->ppid);
+      ProcessInfo *process_info;
+      /* Process not present */
+      Drawing_t *drawing = control_flow_data->drawing;
+      processlist_add(process_list,
+          drawing,
+          pid,
+          process->cpu,
+          process->ppid,
+          &birth,
+          tfc->t_context->index,
+          process->name,
+          &pl_height,
+          &process_info,
+          &hashed_process_data);
+        gtk_widget_set_size_request(drawing->drawing_area,
+                                    -1,
+                                    pl_height);
+        gtk_widget_queue_draw(drawing->drawing_area);
     }
-    else
-    {
-      prop_line_out.color->red = 0xffff;
-      prop_line_out.color->green = 0xffff;
-      prop_line_out.color->blue = 0xffff;
+    /* Set the current process */
+    process_list->current_hash_data[process->cpu] =
+                                               hashed_process_data;
+  }
+
+  /* Now, the process is in the state hash and our own process hash.
+   * We definitely can draw the items related to the ending state.
+   */
+
+  if(likely(ltt_time_compare(hashed_process_data->next_good_time,
+                      evtime) > 0))
+  {
+    if(unlikely(hashed_process_data->x.middle_marked == FALSE)) {
+      TimeWindow time_window = 
+        lttvwindow_get_time_window(control_flow_data->tab);
+
+#ifdef EXTRA_CHECK
+      if(ltt_time_compare(evtime, time_window.start_time) == -1
+            || ltt_time_compare(evtime, time_window.end_time) == 1)
+                return;
+#endif //EXTRA_CHECK
+      Drawing_t *drawing = control_flow_data->drawing;
+      guint width = drawing->width;
+      guint x;
+      convert_time_to_pixels(
+                time_window,
+                evtime,
+                width,
+                &x);
+
+      /* Draw collision indicator */
+      gdk_gc_set_foreground(drawing->gc, &drawing_colors[COL_WHITE]);
+      gdk_draw_point(hashed_process_data->pixmap,
+                     drawing->gc,
+                     x,
+                     (hashed_process_data->height/2)-3);
+      hashed_process_data->x.middle_marked = TRUE;
     }
-  
-    draw_line((void*)&prop_line_out, (void*)draw_context_out);
-    g_free(prop_line_out.color);
-    //gdk_gc_unref(draw_context_out->gc);
-    /* Note : finishing line will have to be added when trace read over. */
-      
-    /* Finally, update the drawing context of the pid_in. */
-
-    DrawContext *draw_context_in = hashed_process_data_in->draw_context;
-    draw_context_in->current->modify_over->x = x;
-    draw_context_in->current->modify_under->x = x;
-    draw_context_in->current->modify_over->y = y_in;
-    draw_context_in->current->modify_under->y = y_in+(height/2)+2;
-    draw_context_in->drawable = control_flow_data->drawing->pixmap;
-    draw_context_in->pango_layout = control_flow_data->drawing->pango_layout;
-    widget = control_flow_data->drawing->drawing_area;
-    //draw_context_in->gc = widget->style->fg_gc[GTK_WIDGET_STATE (widget)];
-    //draw_context_in->gc = widget->style->black_gc;
-    //draw_context_in->gc = gdk_gc_new(control_flow_data->drawing->pixmap);
-    //gdk_gc_copy(draw_context_in->gc, widget->style->black_gc);
-    
-    //draw_arc((void*)&prop_arc, (void*)draw_context_in);
-    //test_draw_item(control_flow_data->drawing, control_flow_data->drawing->pixmap);
-      
-    /* Draw the line/bg of the in process */
-    if(draw_context_in->previous->middle->x == -1)
+  } else {
+    TimeWindow time_window = 
+      lttvwindow_get_time_window(control_flow_data->tab);
+
+#ifdef EXTRA_CHECK
+    if(ltt_time_compare(evtime, time_window.start_time) == -1
+          || ltt_time_compare(evtime, time_window.end_time) == 1)
+              return;
+#endif //EXTRA_CHECK
+    Drawing_t *drawing = control_flow_data->drawing;
+    guint width = drawing->width;
+    guint x;
+
+    convert_time_to_pixels(
+        time_window,
+        evtime,
+        width,
+        &x);
+
+
+    /* Jump over draw if we are at the same x position */
+    if(unlikely(x == hashed_process_data->x.middle &&
+             hashed_process_data->x.middle_used))
     {
-      draw_context_in->previous->over->x =
-                            control_flow_data->drawing->damage_begin;
-      draw_context_in->previous->middle->x = 
-                            control_flow_data->drawing->damage_begin;
-      draw_context_in->previous->under->x =
-                            control_flow_data->drawing->damage_begin;
+      if(unlikely(hashed_process_data->x.middle_marked == FALSE)) {
+        /* Draw collision indicator */
+        gdk_gc_set_foreground(drawing->gc, &drawing_colors[COL_WHITE]);
+        gdk_draw_point(hashed_process_data->pixmap,
+                       drawing->gc,
+                       x,
+                       (hashed_process_data->height/2)-3);
+        hashed_process_data->x.middle_marked = TRUE;
+      }
+      /* jump */
+    } else {
+
+      DrawContext draw_context;
+      /* Now create the drawing context that will be used to draw
+       * items related to the last state. */
+      draw_context.drawable = hashed_process_data->pixmap;
+      draw_context.gc = drawing->gc;
+      draw_context.pango_layout = drawing->pango_layout;
+      draw_context.drawinfo.start.x = hashed_process_data->x.middle;
+      draw_context.drawinfo.end.x = x;
+
+      draw_context.drawinfo.y.over = 1;
+      draw_context.drawinfo.y.middle = (hashed_process_data->height/2);
+      draw_context.drawinfo.y.under = hashed_process_data->height;
+
+      draw_context.drawinfo.start.offset.over = 0;
+      draw_context.drawinfo.start.offset.middle = 0;
+      draw_context.drawinfo.start.offset.under = 0;
+      draw_context.drawinfo.end.offset.over = 0;
+      draw_context.drawinfo.end.offset.middle = 0;
+      draw_context.drawinfo.end.offset.under = 0;
 
-      g_debug("in middle x_beg : %u",control_flow_data->drawing->damage_begin);
+      {
+        /* Draw the line */
+        PropertiesLine prop_line = prepare_s_e_line(process);
+        draw_line((void*)&prop_line, (void*)&draw_context);
 
+      }
+      /* become the last x position */
+      hashed_process_data->x.middle = x;
+      hashed_process_data->x.middle_used = TRUE;
+      hashed_process_data->x.middle_marked = FALSE;
+
+      /* Calculate the next good time */
+      convert_pixels_to_time(width, x+1, time_window,
+                             &hashed_process_data->next_good_time);
     }
+  }
   
-    draw_context_in->current->middle->x = x;
-    draw_context_in->current->over->x = x;
-    draw_context_in->current->under->x = x;
-    draw_context_in->current->middle->y = y_in + height/2;
-    draw_context_in->current->over->y = y_in;
-    draw_context_in->current->under->y = y_in + height;
-    draw_context_in->previous->middle->y = y_in + height/2;
-    draw_context_in->previous->over->y = y_in;
-    draw_context_in->previous->under->y = y_in + height;
-    
-    draw_context_in->drawable = control_flow_data->drawing->pixmap;
-    draw_context_in->pango_layout = control_flow_data->drawing->pango_layout;
+  return 0;
+}
 
-    if(process_in->state->s == LTTV_STATE_RUN)
-    {
-      //draw_context_in->gc = gdk_gc_new(control_flow_data->drawing->pixmap);
-      //gdk_gc_copy(draw_context_in->gc, widget->style->black_gc);
-      draw_context_in->gc = control_flow_data->drawing->gc;
+/* before_process_exit_hook
+ * 
+ * Draw lines for process event.
+ *
+ * @param hook_data ControlFlowData structure of the viewer. 
+ * @param call_data Event context.
+ *
+ * This function adds items to be drawn in a queue for each process.
+ * 
+ */
 
-      PropertiesBG prop_bg;
-      prop_bg.color = g_new(GdkColor,1);
-        
-      switch(tfc->index) {
-        case 0:
-          prop_bg.color->red = 0x1515;
-          prop_bg.color->green = 0x1515;
-          prop_bg.color->blue = 0x8c8c;
-          break;
-        case 1:
-          prop_bg.color->red = 0x4e4e;
-          prop_bg.color->green = 0xa9a9;
-          prop_bg.color->blue = 0xa4a4;
-          break;
-        case 2:
-          prop_bg.color->red = 0x7a7a;
-          prop_bg.color->green = 0x4a4a;
-          prop_bg.color->blue = 0x8b8b;
-          break;
-        case 3:
-          prop_bg.color->red = 0x8080;
-          prop_bg.color->green = 0x7777;
-          prop_bg.color->blue = 0x4747;
-          break;
-        default:
-          prop_bg.color->red = 0xe7e7;
-          prop_bg.color->green = 0xe7e7;
-          prop_bg.color->blue = 0xe7e7;
-      }
-      
 
-      draw_bg((void*)&prop_bg, (void*)draw_context_in);
-      g_free(prop_bg.color);
-      //gdk_gc_unref(draw_context_in->gc);
-    }
+int before_process_exit_hook(void *hook_data, void *call_data)
+{
+  LttvTraceHookByFacility *thf = (LttvTraceHookByFacility*)hook_data;
+  EventsRequest *events_request = (EventsRequest*)thf->hook_data;
 
-    draw_context_in->gc = widget->style->black_gc;
+  ControlFlowData *control_flow_data = events_request->viewer_data;
 
-    GdkColor colorfg_in = { 0, 0x0000, 0xffff, 0x0000 };
-    GdkColor colorbg_in = { 0, 0x0000, 0x0000, 0x0000 };
-    PropertiesText prop_text_in;
-    prop_text_in.foreground = &colorfg_in;
-    prop_text_in.background = &colorbg_in;
-    prop_text_in.size = 6;
-    prop_text_in.position = OVER;
+  LttvTracefileContext *tfc = (LttvTracefileContext *)call_data;
 
-    g_debug("in state : %s", g_quark_to_string(process_in->state->s));
-    /* foreground of text : status of the process */
-    if(process_in->state->s == LTTV_STATE_UNNAMED)
-    {
-      prop_text_in.foreground->red = 0xffff;
-      prop_text_in.foreground->green = 0xffff;
-      prop_text_in.foreground->blue = 0xffff;
-    }
-    else if(process_in->state->s == LTTV_STATE_WAIT_FORK)
-    {
-      prop_text_in.foreground->red = 0x0fff;
-      prop_text_in.foreground->green = 0xffff;
-      prop_text_in.foreground->blue = 0xfff0;
-    }
-    else if(process_in->state->s == LTTV_STATE_WAIT_CPU)
-    {
-      prop_text_in.foreground->red = 0xffff;
-      prop_text_in.foreground->green = 0xffff;
-      prop_text_in.foreground->blue = 0x0000;
-    }
-    else if(process_in->state->s == LTTV_STATE_EXIT)
-    {
-      prop_text_in.foreground->red = 0xffff;
-      prop_text_in.foreground->green = 0x0000;
-      prop_text_in.foreground->blue = 0xffff;
-    }
-    else if(process_in->state->s == LTTV_STATE_WAIT)
-    {
-      prop_text_in.foreground->red = 0xffff;
-      prop_text_in.foreground->green = 0x0000;
-      prop_text_in.foreground->blue = 0x0000;
-    }
-    else if(process_in->state->s == LTTV_STATE_RUN)
-    {
-      prop_text_in.foreground->red = 0x0000;
-      prop_text_in.foreground->green = 0xffff;
-      prop_text_in.foreground->blue = 0x0000;
-    }
-    else
-    {
-      prop_text_in.foreground->red = 0xffff;
-      prop_text_in.foreground->green = 0xffff;
-      prop_text_in.foreground->blue = 0xffff;
-    }
+  LttvTracefileState *tfs = (LttvTracefileState *)call_data;
+
+  LttvTraceState *ts = (LttvTraceState *)tfc->t_context;
+
+  LttEvent *e;
+  e = ltt_tracefile_get_event(tfc->tf);
+
+  LttTime evtime = ltt_event_time(e);
+
+  /* Add process to process list (if not present) */
+  //LttvProcessState *process = tfs->process;
+  guint cpu = ltt_tracefile_num(tfc->tf);
+  LttvProcessState *process = ts->running_process[cpu];
+  guint pid = process->pid;
+  LttTime birth;
+  guint pl_height = 0;
+  HashedProcessData *hashed_process_data = NULL;
+
+  ProcessList *process_list = control_flow_data->process_list;
   
+  g_assert(process != NULL);
 
+  birth = process->creation_time;
 
-    /* Print status of the process : U, WF, WC, E, W, R */
-    if(process_in->state->s == LTTV_STATE_UNNAMED)
-      prop_text_in.text = "U->";
-    else if(process_in->state->s == LTTV_STATE_WAIT_FORK)
-      prop_text_in.text = "WF->";
-    else if(process_in->state->s == LTTV_STATE_WAIT_CPU)
-      prop_text_in.text = "WC->";
-    else if(process_in->state->s == LTTV_STATE_EXIT)
-      prop_text_in.text = "E->";
-    else if(process_in->state->s == LTTV_STATE_WAIT)
-      prop_text_in.text = "W->";
-    else if(process_in->state->s == LTTV_STATE_RUN)
-      prop_text_in.text = "R->";
-    else
-      prop_text_in.text = "U";
-    
-    draw_text((void*)&prop_text_in, (void*)draw_context_in);
-    //gdk_gc_unref(draw_context_in->gc);
-   
-    //draw_context_in->gc = gdk_gc_new(control_flow_data->drawing->pixmap);
-    //gdk_gc_copy(draw_context_in->gc, widget->style->black_gc);
-    draw_context_in->gc = control_flow_data->drawing->gc;
-
-    PropertiesLine prop_line_in;
-    prop_line_in.color = g_new(GdkColor,1);
-    prop_line_in.line_width = 2;
-    prop_line_in.style = GDK_LINE_SOLID;
-    prop_line_in.position = MIDDLE;
-
-    /* color of line : status of the process */
-    if(process_in->state->s == LTTV_STATE_UNNAMED)
-    {
-      prop_line_in.color->red = 0xffff;
-      prop_line_in.color->green = 0xffff;
-      prop_line_in.color->blue = 0xffff;
-    }
-    else if(process_in->state->s == LTTV_STATE_WAIT_FORK)
-    {
-      prop_line_in.color->red = 0x0fff;
-      prop_line_in.color->green = 0xffff;
-      prop_line_in.color->blue = 0xfff0;
-    }
-    else if(process_in->state->s == LTTV_STATE_WAIT_CPU)
-    {
-      prop_line_in.color->red = 0xffff;
-      prop_line_in.color->green = 0xffff;
-      prop_line_in.color->blue = 0x0000;
-    }
-    else if(process_in->state->s == LTTV_STATE_EXIT)
-    {
-      prop_line_in.color->red = 0xffff;
-      prop_line_in.color->green = 0x0000;
-      prop_line_in.color->blue = 0xffff;
-    }
-    else if(process_in->state->s == LTTV_STATE_WAIT)
-    {
-      prop_line_in.color->red = 0xffff;
-      prop_line_in.color->green = 0x0000;
-      prop_line_in.color->blue = 0x0000;
-    }
-    else if(process_in->state->s == LTTV_STATE_RUN)
-    {
-      prop_line_in.color->red = 0x0000;
-      prop_line_in.color->green = 0xffff;
-      prop_line_in.color->blue = 0x0000;
-    }
-    else
+  if(likely(process_list->current_hash_data[cpu] != NULL)) {
+    hashed_process_data = process_list->current_hash_data[cpu];
+  } else {
+    hashed_process_data = processlist_get_process_data(process_list,
+          pid,
+          process->cpu,
+          &birth,
+          tfc->t_context->index);
+    if(unlikely(hashed_process_data == NULL))
     {
-      prop_line_in.color->red = 0xffff;
-      prop_line_in.color->green = 0xffff;
-      prop_line_in.color->blue = 0xffff;
+      g_assert(pid == 0 || pid != process->ppid);
+      /* Process not present */
+      Drawing_t *drawing = control_flow_data->drawing;
+      ProcessInfo *process_info;
+      processlist_add(process_list,
+          drawing,
+          pid,
+          process->cpu,
+          process->ppid,
+          &birth,
+          tfc->t_context->index,
+          process->name,
+          &pl_height,
+          &process_info,
+          &hashed_process_data);
+      gtk_widget_set_size_request(drawing->drawing_area,
+                                  -1,
+                                  pl_height);
+      gtk_widget_queue_draw(drawing->drawing_area);
     }
-  
-    draw_line((void*)&prop_line_in, (void*)draw_context_in);
-    g_free(prop_line_in.color);
-    //gdk_gc_unref(draw_context_in->gc);
   }
 
-  return 0;
-#endif //0
+  /* Now, the process is in the state hash and our own process hash.
+   * We definitely can draw the items related to the ending state.
+   */
+  
+  if(likely(ltt_time_compare(hashed_process_data->next_good_time,
+                      evtime) > 0))
+  {
+    if(unlikely(hashed_process_data->x.middle_marked == FALSE)) {
+      TimeWindow time_window = 
+        lttvwindow_get_time_window(control_flow_data->tab);
+
+#ifdef EXTRA_CHECK
+      if(ltt_time_compare(evtime, time_window.start_time) == -1
+            || ltt_time_compare(evtime, time_window.end_time) == 1)
+                return;
+#endif //EXTRA_CHECK
+      Drawing_t *drawing = control_flow_data->drawing;
+      guint width = drawing->width;
+      guint x;
+      convert_time_to_pixels(
+                time_window,
+                evtime,
+                width,
+                &x);
+
+      /* Draw collision indicator */
+      gdk_gc_set_foreground(drawing->gc, &drawing_colors[COL_WHITE]);
+      gdk_draw_point(hashed_process_data->pixmap,
+                     drawing->gc,
+                     x,
+                     (hashed_process_data->height/2)-3);
+      hashed_process_data->x.middle_marked = TRUE;
+    }
+  } else {
+    TimeWindow time_window = 
+      lttvwindow_get_time_window(control_flow_data->tab);
+
+#ifdef EXTRA_CHECK
+    if(ltt_time_compare(evtime, time_window.start_time) == -1
+          || ltt_time_compare(evtime, time_window.end_time) == 1)
+              return;
+#endif //EXTRA_CHECK
+    Drawing_t *drawing = control_flow_data->drawing;
+    guint width = drawing->width;
+    guint x;
 
+    convert_time_to_pixels(
+        time_window,
+        evtime,
+        width,
+        &x);
 
 
-  /* Text dump */
-#ifdef DONTSHOW
-  GString *string = g_string_new("");;
-  gboolean field_names = TRUE, state = TRUE;
+    /* Jump over draw if we are at the same x position */
+    if(unlikely(x == hashed_process_data->x.middle &&
+           hashed_process_data->x.middle_used))
+    { 
+      if(unlikely(hashed_process_data->x.middle_marked == FALSE)) {
+        /* Draw collision indicator */
+        gdk_gc_set_foreground(drawing->gc, &drawing_colors[COL_WHITE]);
+        gdk_draw_point(hashed_process_data->pixmap,
+                       drawing->gc,
+                       x,
+                       (hashed_process_data->height/2)-3);
+        hashed_process_data->x.middle_marked = TRUE;
+      }
+      /* jump */
+    } else {
+      DrawContext draw_context;
+
+      /* Now create the drawing context that will be used to draw
+       * items related to the last state. */
+      draw_context.drawable = hashed_process_data->pixmap;
+      draw_context.gc = drawing->gc;
+      draw_context.pango_layout = drawing->pango_layout;
+      draw_context.drawinfo.start.x = hashed_process_data->x.middle;
+      draw_context.drawinfo.end.x = x;
+
+      draw_context.drawinfo.y.over = 1;
+      draw_context.drawinfo.y.middle = (hashed_process_data->height/2);
+      draw_context.drawinfo.y.under = hashed_process_data->height;
+
+      draw_context.drawinfo.start.offset.over = 0;
+      draw_context.drawinfo.start.offset.middle = 0;
+      draw_context.drawinfo.start.offset.under = 0;
+      draw_context.drawinfo.end.offset.over = 0;
+      draw_context.drawinfo.end.offset.middle = 0;
+      draw_context.drawinfo.end.offset.under = 0;
 
-  lttv_event_to_string(e, tfc->tf, string, TRUE, field_names, tfs);
-  g_string_append_printf(string,"\n");  
+      {
+        /* Draw the line */
+        PropertiesLine prop_line = prepare_s_e_line(process);
+        draw_line((void*)&prop_line, (void*)&draw_context);
 
-  if(state) {
-    g_string_append_printf(string, " %s",
-        g_quark_to_string(tfs->process->state->s));
+      }
+      /* become the last x position */
+      hashed_process_data->x.middle = x;
+      hashed_process_data->x.middle_used = TRUE;
+      hashed_process_data->x.middle_marked = FALSE;
+
+      /* Calculate the next good time */
+      convert_pixels_to_time(width, x+1, time_window,
+                             &hashed_process_data->next_good_time);
+    }
   }
-
-  g_info("%s",string->str);
-
-  g_string_free(string, TRUE);
   
-  /* End of text dump */
-#endif //DONTSHOW
+  return 0;
 
 }
 
-/* draw_after_hook
+
+
+/* before_process_release_hook
  * 
- * The draw after hook is called by the reading API to have a
- * particular event drawn on the screen.
+ * Draw lines for process event.
+ *
  * @param hook_data ControlFlowData structure of the viewer. 
  * @param call_data Event context.
  *
  * This function adds items to be drawn in a queue for each process.
  * 
  */
-int draw_after_hook(void *hook_data, void *call_data)
+
+
+int before_process_release_hook(void *hook_data, void *call_data)
 {
-  EventsRequest *events_request = (EventsRequest*)hook_data;
+  LttvTraceHookByFacility *thf = (LttvTraceHookByFacility*)hook_data;
+  EventsRequest *events_request = (EventsRequest*)thf->hook_data;
+
   ControlFlowData *control_flow_data = events_request->viewer_data;
 
   LttvTracefileContext *tfc = (LttvTracefileContext *)call_data;
 
   LttvTracefileState *tfs = (LttvTracefileState *)call_data;
-  LttvTraceState *ts =(LttvTraceState *)LTTV_TRACEFILE_CONTEXT(tfs)->t_context;
+
+  LttvTraceState *ts = (LttvTraceState *)tfc->t_context;
 
   LttEvent *e;
-  e = tfc->e;
+  e = ltt_tracefile_get_event(tfc->tf);
 
   LttTime evtime = ltt_event_time(e);
-  TimeWindow time_window = 
-    lttvwindow_get_time_window(control_flow_data->tab);
 
-  LttTime end_time = ltt_time_add(time_window.start_time,
-                                    time_window.time_width);
 
-  if(ltt_time_compare(evtime, time_window.start_time) == -1
-        || ltt_time_compare(evtime, end_time) == 1)
-            return;
+  guint pid;
+  {
+    pid = ltt_event_get_long_unsigned(e, thf->f1);
+  }
 
-  guint width = control_flow_data->drawing->width;
+  /* Add process to process list (if not present) */
+  /* Don't care about the process if it's not in the state hash already :
+   * that means a process that has never done anything in the trace and
+   * unknown suddently gets destroyed : no state meaningful to show. */
+  LttvProcessState *process = lttv_state_find_process(ts, ANY_CPU, pid);
 
-  if(strcmp(ltt_eventtype_name(ltt_event_eventtype(e)),"schedchange") == 0) {
+  if(process != NULL) {
+    LttTime birth;
+    guint pl_height = 0;
+    HashedProcessData *hashed_process_data = NULL;
 
-    g_debug("schedchange!");
+    ProcessList *process_list = control_flow_data->process_list;
     
+    birth = process->creation_time;
+
+    /* Cannot use current process : this event happens on another process,
+     * action done by the parent. */
+    hashed_process_data = processlist_get_process_data(process_list,
+          pid,
+          process->cpu,
+          &birth,
+          tfc->t_context->index);
+    if(unlikely(hashed_process_data == NULL))
     {
-      /* Add process to process list (if not present) */
-      LttvProcessState *process_out, *process_in;
-      LttTime birth;
-      guint y_in = 0, y_out = 0, height = 0, pl_height = 0;
-      HashedProcessData *hashed_process_data_in = NULL;
-
-      ProcessList *process_list =
-        guicontrolflow_get_process_list(control_flow_data);
-      
-      guint pid_in;
-      {
-        guint pid_out;
-        LttField *f = ltt_event_field(e);
-        LttField *element;
-        element = ltt_field_member(f,0);
-        pid_out = ltt_event_get_long_unsigned(e,element);
-        element = ltt_field_member(f,1);
-        pid_in = ltt_event_get_long_unsigned(e,element);
-        g_debug("out : %u  in : %u", pid_out, pid_in);
+      g_assert(pid == 0 || pid != process->ppid);
+      /* Process not present */
+      Drawing_t *drawing = control_flow_data->drawing;
+      ProcessInfo *process_info;
+      processlist_add(process_list,
+          drawing,
+          pid,
+          process->cpu,
+          process->ppid,
+          &birth,
+          tfc->t_context->index,
+          process->name,
+          &pl_height,
+          &process_info,
+          &hashed_process_data);
+      gtk_widget_set_size_request(drawing->drawing_area,
+                                  -1,
+                                  pl_height);
+      gtk_widget_queue_draw(drawing->drawing_area);
+    }
+
+    /* Now, the process is in the state hash and our own process hash.
+     * We definitely can draw the items related to the ending state.
+     */
+    
+    if(likely(ltt_time_compare(hashed_process_data->next_good_time,
+                        evtime) > 0))
+    {
+      if(unlikely(hashed_process_data->x.middle_marked == FALSE)) {
+        TimeWindow time_window = 
+          lttvwindow_get_time_window(control_flow_data->tab);
+
+#ifdef EXTRA_CHECK
+        if(ltt_time_compare(evtime, time_window.start_time) == -1
+              || ltt_time_compare(evtime, time_window.end_time) == 1)
+                  return;
+#endif //EXTRA_CHECK
+        Drawing_t *drawing = control_flow_data->drawing;
+        guint width = drawing->width;
+        guint x;
+        convert_time_to_pixels(
+                  time_window,
+                  evtime,
+                  width,
+                  &x);
+
+        /* Draw collision indicator */
+        gdk_gc_set_foreground(drawing->gc, &drawing_colors[COL_WHITE]);
+        gdk_draw_point(hashed_process_data->pixmap,
+                       drawing->gc,
+                       x,
+                       (hashed_process_data->height/2)-3);
+        hashed_process_data->x.middle_marked = TRUE;
       }
+    } else {
+      TimeWindow time_window = 
+        lttvwindow_get_time_window(control_flow_data->tab);
+
+#ifdef EXTRA_CHECK
+      if(ltt_time_compare(evtime, time_window.start_time) == -1
+            || ltt_time_compare(evtime, time_window.end_time) == 1)
+                return;
+#endif //EXTRA_CHECK
+      Drawing_t *drawing = control_flow_data->drawing;
+      guint width = drawing->width;
+      guint x;
 
+      convert_time_to_pixels(
+          time_window,
+          evtime,
+          width,
+          &x);
 
-      /* Find process pid_in in the list... */
-      process_in = lttv_state_find_process(tfs, pid_in);
-      /* It should exist, because we are after the state update. */
-      g_assert(process_in != NULL);
 
-      birth = process_in->creation_time;
-      const gchar *name = g_quark_to_string(process_in->name);
+      /* Jump over draw if we are at the same x position */
+      if(unlikely(x == hashed_process_data->x.middle &&
+             hashed_process_data->x.middle_used))
+      { 
+        if(unlikely(hashed_process_data->x.middle_marked == FALSE)) {
+          /* Draw collision indicator */
+          gdk_gc_set_foreground(drawing->gc, &drawing_colors[COL_WHITE]);
+          gdk_draw_point(hashed_process_data->pixmap,
+                         drawing->gc,
+                         x,
+                         (hashed_process_data->height/2)-3);
+          hashed_process_data->x.middle_marked = TRUE;
+        }
+        /* jump */
+      } else {
+        DrawContext draw_context;
 
-      if(processlist_get_process_pixels(process_list,
-              pid_in,
-              &birth,
-              tfc->t_context->index,
-              &y_in,
-              &height,
-              &hashed_process_data_in) == 1)
-      {
-          g_assert(!(process_in->pid == 432 && 
-                        ltt_time_compare(process_in->creation_time,
-                                         ltt_time_zero)==0));
+        /* Now create the drawing context that will be used to draw
+         * items related to the last state. */
+        draw_context.drawable = hashed_process_data->pixmap;
+        draw_context.gc = drawing->gc;
+        draw_context.pango_layout = drawing->pango_layout;
+        draw_context.drawinfo.start.x = hashed_process_data->x.middle;
+        draw_context.drawinfo.end.x = x;
 
-          g_assert(!(process_in->pid == 432 && 
-                        process_in->creation_time.tv_nsec == 47797905));
+        draw_context.drawinfo.y.over = 1;
+        draw_context.drawinfo.y.middle = (hashed_process_data->height/2);
+        draw_context.drawinfo.y.under = hashed_process_data->height;
 
-        /* Process not present */
-        processlist_add(process_list,
-            pid_in,
-            &birth,
-            tfc->t_context->index,
-            name,
-            &pl_height,
-            &hashed_process_data_in);
-        processlist_get_process_pixels(process_list,
-                pid_in,
-                &birth,
-                tfc->t_context->index,
-                &y_in,
-                &height,
-                &hashed_process_data_in);
-        drawing_insert_square( control_flow_data->drawing, y_in, height);
+        draw_context.drawinfo.start.offset.over = 0;
+        draw_context.drawinfo.start.offset.middle = 0;
+        draw_context.drawinfo.start.offset.under = 0;
+        draw_context.drawinfo.end.offset.over = 0;
+        draw_context.drawinfo.end.offset.middle = 0;
+        draw_context.drawinfo.end.offset.under = 0;
+
+        {
+          /* Draw the line */
+          PropertiesLine prop_line = prepare_s_e_line(process);
+          draw_line((void*)&prop_line, (void*)&draw_context);
+
+        }
+        /* become the last x position */
+        hashed_process_data->x.middle = x;
+        hashed_process_data->x.middle_used = TRUE;
+        hashed_process_data->x.middle_marked = FALSE;
+
+        /* Calculate the next good time */
+        convert_pixels_to_time(width, x+1, time_window,
+                               &hashed_process_data->next_good_time);
       }
+    }
+  }
+
+  return 0;
+}
+
+
+
+
+
+/* after_process_fork_hook
+ * 
+ * Create the processlist entry for the child process. Put the last
+ * position in x at the current time value.
+ *
+ * @param hook_data ControlFlowData structure of the viewer. 
+ * @param call_data Event context.
+ *
+ * This function adds items to be drawn in a queue for each process.
+ * 
+ */
+int after_process_fork_hook(void *hook_data, void *call_data)
+{
+  LttvTraceHookByFacility *thf = (LttvTraceHookByFacility*)hook_data;
+  EventsRequest *events_request = (EventsRequest*)thf->hook_data;
+  ControlFlowData *control_flow_data = events_request->viewer_data;
+
+  LttvTracefileContext *tfc = (LttvTracefileContext *)call_data;
+
+  LttvTracefileState *tfs = (LttvTracefileState *)call_data;
+
+  LttvTraceState *ts = (LttvTraceState *)tfc->t_context;
+
+  LttEvent *e;
+  e = ltt_tracefile_get_event(tfc->tf);
+
+  LttTime evtime = ltt_event_time(e);
+
+  guint child_pid;
+  {
+    child_pid = ltt_event_get_long_unsigned(e, thf->f2);
+  }
 
-      convert_time_to_pixels(
-          time_window.start_time,
-          end_time,
-          evtime,
-          width,
-          &hashed_process_data_in->x);
-    }
-  } else if(strcmp(
-          ltt_eventtype_name(ltt_event_eventtype(e)),"process") == 0) {
-    /* We are in a fork or exit event */
+  /* Add process to process list (if not present) */
+  LttvProcessState *process_child;
+  LttTime birth;
+  guint pl_height = 0;
+  HashedProcessData *hashed_process_data_child = NULL;
+
+  ProcessList *process_list = control_flow_data->process_list;
+
+  /* Find child in the list... */
+  process_child = lttv_state_find_process(ts, ANY_CPU, child_pid);
+  /* It should exist, because we are after the state update. */
+  g_assert(process_child != NULL);
 
+  birth = process_child->creation_time;
 
+  /* Cannot use current process, because this action is done by the parent
+   * on its child. */
+  hashed_process_data_child = processlist_get_process_data(process_list,
+          child_pid,
+          process_child->cpu,
+          &birth,
+          tfc->t_context->index);
+  if(likely(hashed_process_data_child == NULL))
+  {
+    g_assert(child_pid == 0 || child_pid != process_child->ppid);
+    /* Process not present */
+    Drawing_t *drawing = control_flow_data->drawing;
+    ProcessInfo *process_info;
+    processlist_add(process_list,
+        drawing,
+        child_pid,
+        process_child->cpu,
+        process_child->ppid,
+        &birth,
+        tfc->t_context->index,
+        process_child->name,
+        &pl_height,
+        &process_info,
+        &hashed_process_data_child);
+      gtk_widget_set_size_request(drawing->drawing_area,
+                                  -1,
+                                  pl_height);
+      gtk_widget_queue_draw(drawing->drawing_area);
   }
 
+
+  if(likely(ltt_time_compare(hashed_process_data_child->next_good_time,
+                        evtime) <= 0))
+  {
+    TimeWindow time_window = 
+      lttvwindow_get_time_window(control_flow_data->tab);
+
+#ifdef EXTRA_CHECK
+    if(ltt_time_compare(evtime, time_window.start_time) == -1
+          || ltt_time_compare(evtime, time_window.end_time) == 1)
+              return;
+#endif //EXTRA_CHECK
+    Drawing_t *drawing = control_flow_data->drawing;
+    guint width = drawing->width;
+    guint new_x;
+    convert_time_to_pixels(
+        time_window,
+        evtime,
+        width,
+        &new_x);
+
+    if(likely(hashed_process_data_child->x.over != new_x)) {
+      hashed_process_data_child->x.over = new_x;
+      hashed_process_data_child->x.over_used = FALSE;
+      hashed_process_data_child->x.over_marked = FALSE;
+    }
+    if(likely(hashed_process_data_child->x.middle != new_x)) {
+      hashed_process_data_child->x.middle = new_x;
+      hashed_process_data_child->x.middle_used = FALSE;
+      hashed_process_data_child->x.middle_marked = FALSE;
+    }
+    if(likely(hashed_process_data_child->x.under != new_x)) {
+      hashed_process_data_child->x.under = new_x;
+      hashed_process_data_child->x.under_used = FALSE;
+      hashed_process_data_child->x.under_marked = FALSE;
+    }
+  }
   return 0;
+}
 
 
 
-#if 0
-  EventsRequest *events_request = (EventsRequest*)hook_data;
+/* after_process_exit_hook
+ * 
+ * Create the processlist entry for the child process. Put the last
+ * position in x at the current time value.
+ *
+ * @param hook_data ControlFlowData structure of the viewer. 
+ * @param call_data Event context.
+ *
+ * This function adds items to be drawn in a queue for each process.
+ * 
+ */
+int after_process_exit_hook(void *hook_data, void *call_data)
+{
+  LttvTraceHookByFacility *thf = (LttvTraceHookByFacility*)hook_data;
+  EventsRequest *events_request = (EventsRequest*)thf->hook_data;
   ControlFlowData *control_flow_data = events_request->viewer_data;
 
   LttvTracefileContext *tfc = (LttvTracefileContext *)call_data;
 
   LttvTracefileState *tfs = (LttvTracefileState *)call_data;
-  LttvTraceState *ts =(LttvTraceState *)LTTV_TRACEFILE_CONTEXT(tfs)->t_context;
 
-  
+  LttvTraceState *ts = (LttvTraceState *)tfc->t_context;
+
   LttEvent *e;
-  e = tfc->e;
+  e = ltt_tracefile_get_event(tfc->tf);
 
   LttTime evtime = ltt_event_time(e);
-  TimeWindow time_window = 
-    lttvwindow_get_time_window(control_flow_data->tab);
-
-  LttTime end_time = ltt_time_add(time_window.start_time,
-                                    time_window.time_width);
-  //if(time < time_beg || time > time_end) return;
-  if(ltt_time_compare(evtime, time_window.start_time) == -1
-        || ltt_time_compare(evtime, end_time) == 1)
-            return;
-
-
-  if(strcmp(ltt_eventtype_name(ltt_event_eventtype(e)),"schedchange") == 0)
-  {
-    g_debug("schedchange!");
-    
-    /* Add process to process list (if not present) and get drawing "y" from
-     * process position */
-    guint pid_out, pid_in;
-    LttvProcessState *process_out, *process_in;
-    LttTime birth;
-    guint y_in = 0, y_out = 0, height = 0, pl_height = 0;
-
-    ProcessList *process_list =
-      guicontrolflow_get_process_list(control_flow_data);
 
+  /* Add process to process list (if not present) */
+  //LttvProcessState *process = tfs->process;
+  guint cpu = ltt_tracefile_num(tfc->tf);
+  LttvProcessState *process = ts->running_process[cpu];
 
-    LttField *f = ltt_event_field(e);
-    LttField *element;
-    element = ltt_field_member(f,0);
-    pid_out = ltt_event_get_long_unsigned(e,element);
-    element = ltt_field_member(f,1);
-    pid_in = ltt_event_get_long_unsigned(e,element);
-    //g_debug("out : %u  in : %u", pid_out, pid_in);
+  /* It should exist, because we are after the state update. */
+  g_assert(process != NULL);
 
+  guint pid = process->pid;
+  LttTime birth;
+  guint pl_height = 0;
+  HashedProcessData *hashed_process_data = NULL;
 
-    /* Find process pid_out in the list... */
-    process_out = lttv_state_find_process(tfs, pid_out);
-    if(process_out == NULL) return 0;
-    //g_debug("out : %s",g_quark_to_string(process_out->state->s));
+  ProcessList *process_list = control_flow_data->process_list;
 
-    birth = process_out->creation_time;
-    gchar *name = strdup(g_quark_to_string(process_out->name));
-    HashedProcessData *hashed_process_data_out = NULL;
+  birth = process->creation_time;
 
-    if(processlist_get_process_pixels(process_list,
-            pid_out,
+  if(likely(process_list->current_hash_data[cpu] != NULL) ){
+    hashed_process_data = process_list->current_hash_data[cpu];
+  } else {
+    hashed_process_data = processlist_get_process_data(process_list,
+            pid,
+            process->cpu,
             &birth,
-            tfc->t_context->index,
-            &y_out,
-            &height,
-            &hashed_process_data_out) == 1)
+            tfc->t_context->index);
+    if(unlikely(hashed_process_data == NULL))
     {
+      g_assert(pid == 0 || pid != process->ppid);
       /* Process not present */
+      Drawing_t *drawing = control_flow_data->drawing;
+      ProcessInfo *process_info;
       processlist_add(process_list,
-          pid_out,
+          drawing,
+          pid,
+          process->cpu,
+          process->ppid,
           &birth,
           tfc->t_context->index,
-          name,
+          process->name,
           &pl_height,
-          &hashed_process_data_out);
-      processlist_get_process_pixels(process_list,
-              pid_out,
-              &birth,
-              tfc->t_context->index,
-              &y_out,
-              &height,
-              &hashed_process_data_out);
-      drawing_insert_square( control_flow_data->drawing, y_out, height);
+          &process_info,
+          &hashed_process_data);
+      gtk_widget_set_size_request(drawing->drawing_area,
+                                  -1,
+                                  pl_height);
+      gtk_widget_queue_draw(drawing->drawing_area);
     }
 
-    g_free(name);
-    
-    /* Find process pid_in in the list... */
-    process_in = lttv_state_find_process(tfs, pid_in);
-    if(process_in == NULL) return 0;
-    //g_debug("in : %s",g_quark_to_string(process_in->state->s));
+    /* Set the current process */
+    process_list->current_hash_data[process->cpu] =
+                                             hashed_process_data;
+  }
+
+  if(unlikely(ltt_time_compare(hashed_process_data->next_good_time,
+                        evtime) <= 0))
+  {
+    TimeWindow time_window = 
+      lttvwindow_get_time_window(control_flow_data->tab);
+
+#ifdef EXTRA_CHECK
+    if(ltt_time_compare(evtime, time_window.start_time) == -1
+          || ltt_time_compare(evtime, time_window.end_time) == 1)
+              return;
+#endif //EXTRA_CHECK
+    Drawing_t *drawing = control_flow_data->drawing;
+    guint width = drawing->width;
+    guint new_x;
+    convert_time_to_pixels(
+        time_window,
+        evtime,
+        width,
+        &new_x);
+    if(unlikely(hashed_process_data->x.middle != new_x)) {
+      hashed_process_data->x.middle = new_x;
+      hashed_process_data->x.middle_used = FALSE;
+      hashed_process_data->x.middle_marked = FALSE;
+    }
+  }
 
-    birth = process_in->creation_time;
-    name = strdup(g_quark_to_string(process_in->name));
-    HashedProcessData *hashed_process_data_in = NULL;
+  return 0;
+}
 
-    if(processlist_get_process_pixels(process_list,
-            pid_in,
-            &birth,
-            tfc->t_context->index,
-            &y_in,
-            &height,
-            &hashed_process_data_in) == 1)
-    {
-    /* Process not present */
-      processlist_add(process_list,
-        pid_in,
-        &birth,
-        tfc->t_context->index,
-        name,
-        &pl_height,
-        &hashed_process_data_in);
-      processlist_get_process_pixels(process_list,
-            pid_in,
-            &birth,
-            tfc->t_context->index,
-            &y_in,
-            &height,
-            &hashed_process_data_in);
 
-      drawing_insert_square( control_flow_data->drawing, y_in, height);
-    }
-    g_free(name);
+/* Get the filename of the process to print */
+int after_fs_exec_hook(void *hook_data, void *call_data)
+{
+  LttvTraceHookByFacility *thf = (LttvTraceHookByFacility*)hook_data;
+  EventsRequest *events_request = (EventsRequest*)thf->hook_data;
+  ControlFlowData *control_flow_data = events_request->viewer_data;
 
+  LttvTracefileContext *tfc = (LttvTracefileContext *)call_data;
 
-    /* Find pixels corresponding to time of the event. If the time does
-     * not fit in the window, show a warning, not supposed to happend. */
-    //guint x = 0;
-    //guint width = control_flow_data->drawing->drawing_area->allocation.width;
+  LttvTracefileState *tfs = (LttvTracefileState *)call_data;
 
-    //LttTime time = ltt_event_time(e);
+  LttvTraceState *ts = (LttvTraceState *)tfc->t_context;
 
-    //LttTime window_end = ltt_time_add(time_window->time_width,
-    //                      time_window->start_time);
+  guint cpu = ltt_tracefile_num(tfc->tf);
+  LttvProcessState *process = ts->running_process[cpu];
+  g_assert(process != NULL);
 
-    
-    //convert_time_to_pixels(
-    //    time_window->start_time,
-    //    window_end,
-    //    time,
-    //    width,
-    //    &x);
-    
-    //assert(x <= width);
-    
-    /* draw what represents the event for outgoing process. */
-
-    DrawContext *draw_context_out = hashed_process_data_out->draw_context;
-    //draw_context_out->current->modify_over->x = x;
-    draw_context_out->current->modify_over->y = y_out;
-    draw_context_out->current->modify_under->y = y_out+(height/2)+2;
-    draw_context_out->drawable = control_flow_data->drawing->pixmap;
-    draw_context_out->pango_layout = control_flow_data->drawing->pango_layout;
-    GtkWidget *widget = control_flow_data->drawing->drawing_area;
-    //draw_context_out->gc = widget->style->fg_gc[GTK_WIDGET_STATE (widget)];
-    //draw_arc((void*)&prop_arc, (void*)draw_context_out);
-    //test_draw_item(control_flow_data->drawing, control_flow_data->drawing->pixmap);
-     
-    /*if(process_out->state->s == LTTV_STATE_RUN)
-    {
-      draw_context_out->gc = gdk_gc_new(control_flow_data->drawing->pixmap);
-      gdk_gc_copy(draw_context_out->gc, widget->style->black_gc);
-      PropertiesBG prop_bg;
-      prop_bg.color = g_new(GdkColor,1);
-      
-      prop_bg.color->red = 0xffff;
-      prop_bg.color->green = 0xffff;
-      prop_bg.color->blue = 0xffff;
-      
-      draw_bg((void*)&prop_bg, (void*)draw_context_out);
-      g_free(prop_bg.color);
-      gdk_gc_unref(draw_context_out->gc);
-    }*/
-
-    draw_context_out->gc = widget->style->black_gc;
-
-    GdkColor colorfg_out = { 0, 0xffff, 0x0000, 0x0000 };
-    GdkColor colorbg_out = { 0, 0x0000, 0x0000, 0x0000 };
-    PropertiesText prop_text_out;
-    prop_text_out.foreground = &colorfg_out;
-    prop_text_out.background = &colorbg_out;
-    prop_text_out.size = 6;
-    prop_text_out.position = OVER;
-
-    /* color of text : status of the process */
-    if(process_out->state->s == LTTV_STATE_UNNAMED)
-    {
-      prop_text_out.foreground->red = 0xffff;
-      prop_text_out.foreground->green = 0xffff;
-      prop_text_out.foreground->blue = 0xffff;
-    }
-    else if(process_out->state->s == LTTV_STATE_WAIT_FORK)
-    {
-      prop_text_out.foreground->red = 0x0fff;
-      prop_text_out.foreground->green = 0xffff;
-      prop_text_out.foreground->blue = 0xfff0;
-    }
-    else if(process_out->state->s == LTTV_STATE_WAIT_CPU)
-    {
-      prop_text_out.foreground->red = 0xffff;
-      prop_text_out.foreground->green = 0xffff;
-      prop_text_out.foreground->blue = 0x0000;
-    }
-    else if(process_out->state->s == LTTV_STATE_EXIT)
-    {
-      prop_text_out.foreground->red = 0xffff;
-      prop_text_out.foreground->green = 0x0000;
-      prop_text_out.foreground->blue = 0xffff;
-    }
-    else if(process_out->state->s == LTTV_STATE_WAIT)
-    {
-      prop_text_out.foreground->red = 0xffff;
-      prop_text_out.foreground->green = 0x0000;
-      prop_text_out.foreground->blue = 0x0000;
-    }
-    else if(process_out->state->s == LTTV_STATE_RUN)
-    {
-      prop_text_out.foreground->red = 0x0000;
-      prop_text_out.foreground->green = 0xffff;
-      prop_text_out.foreground->blue = 0x0000;
-    }
-    else
-    {
-      prop_text_out.foreground->red = 0xffff;
-      prop_text_out.foreground->green = 0xffff;
-      prop_text_out.foreground->blue = 0xffff;
-    }
-    /* Print status of the process : U, WF, WC, E, W, R */
-    if(process_out->state->s == LTTV_STATE_UNNAMED)
-      prop_text_out.text = "U";
-    else if(process_out->state->s == LTTV_STATE_WAIT_FORK)
-      prop_text_out.text = "WF";
-    else if(process_out->state->s == LTTV_STATE_WAIT_CPU)
-      prop_text_out.text = "WC";
-    else if(process_out->state->s == LTTV_STATE_EXIT)
-      prop_text_out.text = "E";
-    else if(process_out->state->s == LTTV_STATE_WAIT)
-      prop_text_out.text = "W";
-    else if(process_out->state->s == LTTV_STATE_RUN)
-      prop_text_out.text = "R";
-    else
-      prop_text_out.text = "U";
-    
-    draw_text((void*)&prop_text_out, (void*)draw_context_out);
+  guint pid = process->pid;
 
-    //gdk_gc_unref(draw_context_out->gc);
+  /* Well, the process_out existed : we must get it in the process hash
+   * or add it, and draw its items.
+   */
+   /* Add process to process list (if not present) */
+  guint pl_height = 0;
+  HashedProcessData *hashed_process_data = NULL;
+  ProcessList *process_list = control_flow_data->process_list;
+  LttTime birth = process->creation_time;
  
-    draw_context_out->current->middle->y = y_out+height/2;
-    draw_context_out->current->over->y = y_out;
-    draw_context_out->current->under->y = y_out+height;
-    draw_context_out->current->status = process_out->state->s;
-    
-    /* for pid_out : remove previous, Prev = current, new current (default) */
-    g_free(draw_context_out->previous->modify_under);
-    g_free(draw_context_out->previous->modify_middle);
-    g_free(draw_context_out->previous->modify_over);
-    g_free(draw_context_out->previous->under);
-    g_free(draw_context_out->previous->middle);
-    g_free(draw_context_out->previous->over);
-    g_free(draw_context_out->previous);
-
-    draw_context_out->previous = draw_context_out->current;
-    
-    draw_context_out->current = g_new(DrawInfo,1);
-    draw_context_out->current->over = g_new(ItemInfo,1);
-    draw_context_out->current->over->x = -1;
-    draw_context_out->current->over->y = -1;
-    draw_context_out->current->middle = g_new(ItemInfo,1);
-    draw_context_out->current->middle->x = -1;
-    draw_context_out->current->middle->y = -1;
-    draw_context_out->current->under = g_new(ItemInfo,1);
-    draw_context_out->current->under->x = -1;
-    draw_context_out->current->under->y = -1;
-    draw_context_out->current->modify_over = g_new(ItemInfo,1);
-    draw_context_out->current->modify_over->x = -1;
-    draw_context_out->current->modify_over->y = -1;
-    draw_context_out->current->modify_middle = g_new(ItemInfo,1);
-    draw_context_out->current->modify_middle->x = -1;
-    draw_context_out->current->modify_middle->y = -1;
-    draw_context_out->current->modify_under = g_new(ItemInfo,1);
-    draw_context_out->current->modify_under->x = -1;
-    draw_context_out->current->modify_under->y = -1;
-    draw_context_out->current->status = LTTV_STATE_UNNAMED;
-      
-    /* Finally, update the drawing context of the pid_in. */
-
-    DrawContext *draw_context_in = hashed_process_data_in->draw_context;
-    //draw_context_in->current->modify_over->x = x;
-    draw_context_in->current->modify_over->y = y_in;
-    draw_context_in->current->modify_under->y = y_in+(height/2)+2;
-    draw_context_in->drawable = control_flow_data->drawing->pixmap;
-    draw_context_in->pango_layout = control_flow_data->drawing->pango_layout;
-    widget = control_flow_data->drawing->drawing_area;
-    //draw_context_in->gc = widget->style->fg_gc[GTK_WIDGET_STATE (widget)];
-    
-    //draw_arc((void*)&prop_arc, (void*)draw_context_in);
-    //test_draw_item(control_flow_data->drawing, control_flow_data->drawing->pixmap);
-     
-    /*if(process_in->state->s == LTTV_STATE_RUN)
-    {
-      draw_context_in->gc = gdk_gc_new(control_flow_data->drawing->pixmap);
-      gdk_gc_copy(draw_context_in->gc, widget->style->black_gc);
-      PropertiesBG prop_bg;
-      prop_bg.color = g_new(GdkColor,1);
-      
-      prop_bg.color->red = 0xffff;
-      prop_bg.color->green = 0xffff;
-      prop_bg.color->blue = 0xffff;
-      
-      draw_bg((void*)&prop_bg, (void*)draw_context_in);
-      g_free(prop_bg.color);
-      gdk_gc_unref(draw_context_in->gc);
-    }*/
-
-    draw_context_in->gc = widget->style->black_gc;
-
-    GdkColor colorfg_in = { 0, 0x0000, 0xffff, 0x0000 };
-    GdkColor colorbg_in = { 0, 0x0000, 0x0000, 0x0000 };
-    PropertiesText prop_text_in;
-    prop_text_in.foreground = &colorfg_in;
-    prop_text_in.background = &colorbg_in;
-    prop_text_in.size = 6;
-    prop_text_in.position = OVER;
-
-    /* foreground of text : status of the process */
-    if(process_in->state->s == LTTV_STATE_UNNAMED)
-    {
-      prop_text_in.foreground->red = 0xffff;
-      prop_text_in.foreground->green = 0xffff;
-      prop_text_in.foreground->blue = 0xffff;
-    }
-    else if(process_in->state->s == LTTV_STATE_WAIT_FORK)
-    {
-      prop_text_in.foreground->red = 0x0fff;
-      prop_text_in.foreground->green = 0xffff;
-      prop_text_in.foreground->blue = 0xfff0;
-    }
-    else if(process_in->state->s == LTTV_STATE_WAIT_CPU)
-    {
-      prop_text_in.foreground->red = 0xffff;
-      prop_text_in.foreground->green = 0xffff;
-      prop_text_in.foreground->blue = 0x0000;
-    }
-    else if(process_in->state->s == LTTV_STATE_EXIT)
-    {
-      prop_text_in.foreground->red = 0xffff;
-      prop_text_in.foreground->green = 0x0000;
-      prop_text_in.foreground->blue = 0xffff;
-    }
-    else if(process_in->state->s == LTTV_STATE_WAIT)
-    {
-      prop_text_in.foreground->red = 0xffff;
-      prop_text_in.foreground->green = 0x0000;
-      prop_text_in.foreground->blue = 0x0000;
-    }
-    else if(process_in->state->s == LTTV_STATE_RUN)
-    {
-      prop_text_in.foreground->red = 0x0000;
-      prop_text_in.foreground->green = 0xffff;
-      prop_text_in.foreground->blue = 0x0000;
-    }
-    else
+  if(likely(process_list->current_hash_data[cpu] != NULL)) {
+    hashed_process_data = process_list->current_hash_data[cpu];
+  } else {
+    hashed_process_data = processlist_get_process_data(process_list,
+            pid,
+            process->cpu,
+            &birth,
+            tfc->t_context->index);
+    if(unlikely(hashed_process_data == NULL))
     {
-      prop_text_in.foreground->red = 0xffff;
-      prop_text_in.foreground->green = 0xffff;
-      prop_text_in.foreground->blue = 0xffff;
-    }
-  
-
-    /* Print status of the process : U, WF, WC, E, W, R */
-    if(process_in->state->s == LTTV_STATE_UNNAMED)
-      prop_text_in.text = "U";
-    else if(process_in->state->s == LTTV_STATE_WAIT_FORK)
-      prop_text_in.text = "WF";
-    else if(process_in->state->s == LTTV_STATE_WAIT_CPU)
-      prop_text_in.text = "WC";
-    else if(process_in->state->s == LTTV_STATE_EXIT)
-      prop_text_in.text = "E";
-    else if(process_in->state->s == LTTV_STATE_WAIT)
-      prop_text_in.text = "W";
-    else if(process_in->state->s == LTTV_STATE_RUN)
-      prop_text_in.text = "R";
-    else
-      prop_text_in.text = "U";
-    
-    draw_text((void*)&prop_text_in, (void*)draw_context_in);
-    
-
-    if(process_in->state->s == LTTV_STATE_RUN)
-    { 
-      gchar tmp[255];
-      prop_text_in.foreground = &colorfg_in;
-      prop_text_in.background = &colorbg_in;
-      prop_text_in.foreground->red = 0xffff;
-      prop_text_in.foreground->green = 0xffff;
-      prop_text_in.foreground->blue = 0xffff;
-      prop_text_in.size = 6;
-      prop_text_in.position = UNDER;
-
-      prop_text_in.text = g_new(gchar, 260);
-      strcpy(prop_text_in.text, "CPU ");
-      snprintf(tmp, 255, "%u", tfc->index);
-      strcat(prop_text_in.text, tmp);
-
-      draw_text((void*)&prop_text_in, (void*)draw_context_in);
-      g_free(prop_text_in.text);
+      g_assert(pid == 0 || pid != process->ppid);
+      ProcessInfo *process_info;
+      /* Process not present */
+      Drawing_t *drawing = control_flow_data->drawing;
+      processlist_add(process_list,
+          drawing,
+          pid,
+          process->cpu,
+          process->ppid,
+          &birth,
+          tfc->t_context->index,
+          process->name,
+          &pl_height,
+          &process_info,
+          &hashed_process_data);
+        gtk_widget_set_size_request(drawing->drawing_area,
+                                    -1,
+                                    pl_height);
+        gtk_widget_queue_draw(drawing->drawing_area);
     }
-
-    
-    draw_context_in->current->middle->y = y_in+height/2;
-    draw_context_in->current->over->y = y_in;
-    draw_context_in->current->under->y = y_in+height;
-    draw_context_in->current->status = process_in->state->s;
-
-    /* for pid_in : remove previous, Prev = current, new current (default) */
-    g_free(draw_context_in->previous->modify_under);
-    g_free(draw_context_in->previous->modify_middle);
-    g_free(draw_context_in->previous->modify_over);
-    g_free(draw_context_in->previous->under);
-    g_free(draw_context_in->previous->middle);
-    g_free(draw_context_in->previous->over);
-    g_free(draw_context_in->previous);
-
-    draw_context_in->previous = draw_context_in->current;
-    
-    draw_context_in->current = g_new(DrawInfo,1);
-    draw_context_in->current->over = g_new(ItemInfo,1);
-    draw_context_in->current->over->x = -1;
-    draw_context_in->current->over->y = -1;
-    draw_context_in->current->middle = g_new(ItemInfo,1);
-    draw_context_in->current->middle->x = -1;
-    draw_context_in->current->middle->y = -1;
-    draw_context_in->current->under = g_new(ItemInfo,1);
-    draw_context_in->current->under->x = -1;
-    draw_context_in->current->under->y = -1;
-    draw_context_in->current->modify_over = g_new(ItemInfo,1);
-    draw_context_in->current->modify_over->x = -1;
-    draw_context_in->current->modify_over->y = -1;
-    draw_context_in->current->modify_middle = g_new(ItemInfo,1);
-    draw_context_in->current->modify_middle->x = -1;
-    draw_context_in->current->modify_middle->y = -1;
-    draw_context_in->current->modify_under = g_new(ItemInfo,1);
-    draw_context_in->current->modify_under->x = -1;
-    draw_context_in->current->modify_under->y = -1;
-    draw_context_in->current->status = LTTV_STATE_UNNAMED;
-  
+    /* Set the current process */
+    process_list->current_hash_data[process->cpu] =
+                                               hashed_process_data;
   }
 
+  processlist_set_name(process_list, process->name, hashed_process_data);
+
   return 0;
-#endif //0
+
 }
 
 
@@ -1779,6 +1706,7 @@ gint update_time_window_hook(void *hook_data, void *call_data)
 {
   ControlFlowData *control_flow_data = (ControlFlowData*) hook_data;
   Drawing_t *drawing = control_flow_data->drawing;
+  ProcessList *process_list = control_flow_data->process_list;
 
   const TimeWindowNotifyData *time_window_nofify_data = 
                           ((const TimeWindowNotifyData *)call_data);
@@ -1800,13 +1728,13 @@ gint update_time_window_hook(void *hook_data, void *call_data)
    * currently shown time interval. (reuse is only for scrolling)
    */
 
-  g_info("Old time window HOOK : %u, %u to %u, %u",
+  g_info("Old time window HOOK : %lu, %lu to %lu, %lu",
       old_time_window->start_time.tv_sec,
       old_time_window->start_time.tv_nsec,
       old_time_window->time_width.tv_sec,
       old_time_window->time_width.tv_nsec);
 
-  g_info("New time window HOOK : %u, %u to %u, %u",
+  g_info("New time window HOOK : %lu, %lu to %lu, %lu",
       new_time_window->start_time.tv_sec,
       new_time_window->start_time.tv_nsec,
       new_time_window->time_width.tv_sec,
@@ -1818,11 +1746,11 @@ gint update_time_window_hook(void *hook_data, void *call_data)
     /* Same scale (scrolling) */
     g_info("scrolling");
     LttTime *ns = &new_time_window->start_time;
+    LttTime *nw = &new_time_window->time_width;
     LttTime *os = &old_time_window->start_time;
-    LttTime old_end = ltt_time_add(old_time_window->start_time,
-                                    old_time_window->time_width);
-    LttTime new_end = ltt_time_add(new_time_window->start_time,
-                                    new_time_window->time_width);
+    LttTime *ow = &old_time_window->time_width;
+    LttTime old_end = old_time_window->end_time;
+    LttTime new_end = new_time_window->end_time;
     //if(ns<os+w<ns+w)
     //if(ns<os+w && os+w<ns+w)
     //if(ns<old_end && os<ns)
@@ -1834,20 +1762,20 @@ gint update_time_window_hook(void *hook_data, void *call_data)
       guint x = 0;
       guint width = control_flow_data->drawing->width;
       convert_time_to_pixels(
-          *os,
-          old_end,
+          *old_time_window,
           *ns,
           width,
           &x);
 
       /* Copy old data to new location */
-      gdk_draw_drawable (control_flow_data->drawing->pixmap,
-          control_flow_data->drawing->drawing_area->style->black_gc,
-          control_flow_data->drawing->pixmap,
-          x, 0,
-          0, 0,
-         control_flow_data->drawing->width-x+SAFETY, -1);
+      copy_pixmap_region(process_list,
+                  NULL,
+                  control_flow_data->drawing->drawing_area->style->black_gc,
+                  NULL,
+                  x, 0,
+                  0, 0,
+                  control_flow_data->drawing->width-x+SAFETY, -1);
+
       if(drawing->damage_begin == drawing->damage_end)
         drawing->damage_begin = control_flow_data->drawing->width-x;
       else
@@ -1856,22 +1784,20 @@ gint update_time_window_hook(void *hook_data, void *call_data)
       drawing->damage_end = control_flow_data->drawing->width;
 
       /* Clear the data request background, but not SAFETY */
-      gdk_draw_rectangle (control_flow_data->drawing->pixmap,
-          //control_flow_data->drawing->drawing_area->style->black_gc,
+      rectangle_pixmap(process_list,
           control_flow_data->drawing->drawing_area->style->black_gc,
           TRUE,
           drawing->damage_begin+SAFETY, 0,
           drawing->damage_end - drawing->damage_begin,  // do not overlap
-          control_flow_data->drawing->height);
-
-      gtk_widget_queue_draw_area (drawing->drawing_area,
-                                0,0,
-                                control_flow_data->drawing->width,
-                                control_flow_data->drawing->height);
+          -1);
+      gtk_widget_queue_draw(drawing->drawing_area);
+      //gtk_widget_queue_draw_area (drawing->drawing_area,
+      //                          0,0,
+      //                          control_flow_data->drawing->width,
+      //                          control_flow_data->drawing->height);
 
       /* Get new data for the rest. */
       drawing_data_request(control_flow_data->drawing,
-          &control_flow_data->drawing->pixmap,
           drawing->damage_begin, 0,
           drawing->damage_end - drawing->damage_begin,
           control_flow_data->drawing->height);
@@ -1887,17 +1813,16 @@ gint update_time_window_hook(void *hook_data, void *call_data)
         guint x = 0;
         guint width = control_flow_data->drawing->width;
         convert_time_to_pixels(
-            *ns,
-            new_end,
+            *new_time_window,
             *os,
             width,
             &x);
         
-
         /* Copy old data to new location */
-        gdk_draw_drawable (control_flow_data->drawing->pixmap,
+        copy_pixmap_region  (process_list,
+            NULL,
             control_flow_data->drawing->drawing_area->style->black_gc,
-            control_flow_data->drawing->pixmap,
+            NULL,
             0, 0,
             x, 0,
             -1, -1);
@@ -1910,22 +1835,22 @@ gint update_time_window_hook(void *hook_data, void *call_data)
 
         drawing->damage_begin = 0;
         
-        gdk_draw_rectangle (control_flow_data->drawing->pixmap,
+        rectangle_pixmap (process_list,
           control_flow_data->drawing->drawing_area->style->black_gc,
           TRUE,
           drawing->damage_begin, 0,
           drawing->damage_end - drawing->damage_begin,  // do not overlap
-          control_flow_data->drawing->height);
+          -1);
 
-        gtk_widget_queue_draw_area (drawing->drawing_area,
-                                0,0,
-                                control_flow_data->drawing->width,
-                                control_flow_data->drawing->height);
+        gtk_widget_queue_draw(drawing->drawing_area);
+        //gtk_widget_queue_draw_area (drawing->drawing_area,
+        //                        0,0,
+        //                        control_flow_data->drawing->width,
+        //                        control_flow_data->drawing->height);
 
 
         /* Get new data for the rest. */
         drawing_data_request(control_flow_data->drawing,
-            &control_flow_data->drawing->pixmap,
             drawing->damage_begin, 0,
             drawing->damage_end - drawing->damage_begin,
             control_flow_data->drawing->height);
@@ -1939,23 +1864,23 @@ gint update_time_window_hook(void *hook_data, void *call_data)
           /* Cannot reuse any part of the screen : far jump */
           
           
-          gdk_draw_rectangle (control_flow_data->drawing->pixmap,
+          rectangle_pixmap (process_list,
             control_flow_data->drawing->drawing_area->style->black_gc,
             TRUE,
             0, 0,
             control_flow_data->drawing->width+SAFETY, // do not overlap
-            control_flow_data->drawing->height);
+            -1);
 
-          gtk_widget_queue_draw_area (drawing->drawing_area,
-                                0,0,
-                                control_flow_data->drawing->width,
-                                control_flow_data->drawing->height);
+          //gtk_widget_queue_draw_area (drawing->drawing_area,
+          //                      0,0,
+          //                      control_flow_data->drawing->width,
+          //                      control_flow_data->drawing->height);
+          gtk_widget_queue_draw(drawing->drawing_area);
 
           drawing->damage_begin = 0;
           drawing->damage_end = control_flow_data->drawing->width;
 
           drawing_data_request(control_flow_data->drawing,
-              &control_flow_data->drawing->pixmap,
               0, 0,
               control_flow_data->drawing->width,
               control_flow_data->drawing->height);
@@ -1967,30 +1892,32 @@ gint update_time_window_hook(void *hook_data, void *call_data)
     /* Different scale (zoom) */
     g_info("zoom");
 
-    gdk_draw_rectangle (control_flow_data->drawing->pixmap,
+    rectangle_pixmap (process_list,
           control_flow_data->drawing->drawing_area->style->black_gc,
           TRUE,
           0, 0,
           control_flow_data->drawing->width+SAFETY, // do not overlap
-          control_flow_data->drawing->height);
+          -1);
 
-    gtk_widget_queue_draw_area (drawing->drawing_area,
-                                0,0,
-                                control_flow_data->drawing->width,
-                                control_flow_data->drawing->height);
+    //gtk_widget_queue_draw_area (drawing->drawing_area,
+    //                            0,0,
+    //                            control_flow_data->drawing->width,
+    //                            control_flow_data->drawing->height);
+    gtk_widget_queue_draw(drawing->drawing_area);
   
     drawing->damage_begin = 0;
     drawing->damage_end = control_flow_data->drawing->width;
 
     drawing_data_request(control_flow_data->drawing,
-        &control_flow_data->drawing->pixmap,
         0, 0,
         control_flow_data->drawing->width,
         control_flow_data->drawing->height);
   }
 
+  /* Update directly when scrolling */
+  gdk_window_process_updates(control_flow_data->drawing->drawing_area->window,
+      TRUE);
 
-  
   return 0;
 }
 
@@ -1998,32 +1925,22 @@ gint traceset_notify(void *hook_data, void *call_data)
 {
   ControlFlowData *control_flow_data = (ControlFlowData*) hook_data;
   Drawing_t *drawing = control_flow_data->drawing;
-  GtkWidget *widget = drawing->drawing_area;
 
+  if(unlikely(drawing->gc == NULL)) {
+    return FALSE;
+  }
+  if(drawing->dotted_gc == NULL) {
+    return FALSE;
+  }
 
   drawing_clear(control_flow_data->drawing);
   processlist_clear(control_flow_data->process_list);
+  gtk_widget_set_size_request(
+      control_flow_data->drawing->drawing_area,
+                -1, processlist_get_height(control_flow_data->process_list));
   redraw_notify(control_flow_data, NULL);
 
   request_background_data(control_flow_data);
-#if 0
-  drawing->damage_begin = 0;
-  drawing->damage_end = drawing->width;
-  if(drawing->damage_begin < drawing->damage_end)
-  {
-    drawing_data_request(drawing,
-                         &drawing->pixmap,
-                         drawing->damage_begin,
-                         0,
-                         drawing->damage_end-drawing->damage_begin,
-                         drawing->height);
-  }
-
-  gtk_widget_queue_draw_area(drawing->drawing_area,
-                             0,0,
-                             drawing->width,
-                             drawing->height);
-#endif //0
  
   return FALSE;
 }
@@ -2037,31 +1954,35 @@ gint redraw_notify(void *hook_data, void *call_data)
   drawing->damage_begin = 0;
   drawing->damage_end = drawing->width;
 
-
-  // Clear the image
-  gdk_draw_rectangle (drawing->pixmap,
+  /* fun feature, to be separated someday... */
+  drawing_clear(control_flow_data->drawing);
+  processlist_clear(control_flow_data->process_list);
+  gtk_widget_set_size_request(
+      control_flow_data->drawing->drawing_area,
+                -1, processlist_get_height(control_flow_data->process_list));
+  // Clear the images
+  rectangle_pixmap (control_flow_data->process_list,
         widget->style->black_gc,
         TRUE,
         0, 0,
-        drawing->width+SAFETY,
-        drawing->height);
-
+        drawing->alloc_width,
+        -1);
 
+  gtk_widget_queue_draw(drawing->drawing_area);
+  
   if(drawing->damage_begin < drawing->damage_end)
   {
     drawing_data_request(drawing,
-                         &drawing->pixmap,
                          drawing->damage_begin,
                          0,
                          drawing->damage_end-drawing->damage_begin,
                          drawing->height);
   }
 
-  gtk_widget_queue_draw_area(drawing->drawing_area,
-                             0,0,
-                             drawing->width,
-                             drawing->height);
+  //gtk_widget_queue_draw_area(drawing->drawing_area,
+  //                           0,0,
+  //                           drawing->width,
+  //                           drawing->height);
   return FALSE;
 
 }
@@ -2071,14 +1992,12 @@ gint continue_notify(void *hook_data, void *call_data)
 {
   ControlFlowData *control_flow_data = (ControlFlowData*) hook_data;
   Drawing_t *drawing = control_flow_data->drawing;
-  GtkWidget *widget = drawing->drawing_area;
 
   //g_assert(widget->allocation.width == drawing->damage_end);
 
   if(drawing->damage_begin < drawing->damage_end)
   {
     drawing_data_request(drawing,
-                         &drawing->pixmap,
                          drawing->damage_begin,
                          0,
                          drawing->damage_end-drawing->damage_begin,
@@ -2101,7 +2020,12 @@ gint update_current_time_hook(void *hook_data, void *call_data)
   
   LttTime time_begin = time_window.start_time;
   LttTime width = time_window.time_width;
-  LttTime half_width = ltt_time_div(width,2.0);
+  LttTime half_width;
+  {
+    guint64 time_ll = ltt_time_to_uint64(width);
+    time_ll = time_ll >> 1; /* divide by two */
+    half_width = ltt_time_from_uint64(time_ll);
+  }
   LttTime time_end = ltt_time_add(time_begin, width);
 
   LttvTracesetContext * tsc =
@@ -2110,7 +2034,7 @@ gint update_current_time_hook(void *hook_data, void *call_data)
   LttTime trace_start = tsc->time_span.start_time;
   LttTime trace_end = tsc->time_span.end_time;
   
-  g_info("New current time HOOK : %u, %u", current_time.tv_sec,
+  g_info("New current time HOOK : %lu, %lu", current_time.tv_sec,
               current_time.tv_nsec);
 
 
@@ -2125,42 +2049,46 @@ gint update_current_time_hook(void *hook_data, void *call_data)
    * at one end of the trace. */
   
   
-  if(ltt_time_compare(current_time, time_begin) == -1)
+  if(ltt_time_compare(current_time, time_begin) < 0)
   {
     TimeWindow new_time_window;
 
     if(ltt_time_compare(current_time,
-          ltt_time_add(trace_start,half_width)) == -1)
+          ltt_time_add(trace_start,half_width)) < 0)
       time_begin = trace_start;
     else
       time_begin = ltt_time_sub(current_time,half_width);
   
     new_time_window.start_time = time_begin;
     new_time_window.time_width = width;
+    new_time_window.time_width_double = ltt_time_to_double(width);
+    new_time_window.end_time = ltt_time_add(time_begin, width);
 
     lttvwindow_report_time_window(control_flow_data->tab, new_time_window);
   }
-  else if(ltt_time_compare(current_time, time_end) == 1)
+  else if(ltt_time_compare(current_time, time_end) > 0)
   {
     TimeWindow new_time_window;
 
-    if(ltt_time_compare(current_time, ltt_time_sub(trace_end, half_width)) == 1)
+    if(ltt_time_compare(current_time, ltt_time_sub(trace_end, half_width)) > 0)
       time_begin = ltt_time_sub(trace_end,width);
     else
       time_begin = ltt_time_sub(current_time,half_width);
   
     new_time_window.start_time = time_begin;
     new_time_window.time_width = width;
+    new_time_window.time_width_double = ltt_time_to_double(width);
+    new_time_window.end_time = ltt_time_add(time_begin, width);
 
     lttvwindow_report_time_window(control_flow_data->tab, new_time_window);
     
   }
-  //gtk_widget_queue_draw(control_flow_data->drawing->drawing_area);
-  gtk_widget_queue_draw_area(drawing->drawing_area,
-                             0,0,
-                             drawing->width,
-                             drawing->height);
+  gtk_widget_queue_draw(control_flow_data->drawing->drawing_area);
   
+  /* Update directly when scrolling */
+  gdk_window_process_updates(control_flow_data->drawing->drawing_area->window,
+      TRUE);
+                             
   return 0;
 }
 
@@ -2168,6 +2096,7 @@ typedef struct _ClosureData {
   EventsRequest *events_request;
   LttvTracesetState *tss;
   LttTime end_time;
+  guint x_end;
 } ClosureData;
   
 
@@ -2179,23 +2108,11 @@ void draw_closure(gpointer key, gpointer value, gpointer user_data)
     
   EventsRequest *events_request = closure_data->events_request;
   ControlFlowData *control_flow_data = events_request->viewer_data;
-  Drawing_t *drawing = control_flow_data->drawing;
 
   LttvTracesetState *tss = closure_data->tss;
-  LttvTracesetContext *tsc = (LttvTracesetContext*)closure_data->tss;
+  LttvTracesetContext *tsc = (LttvTracesetContext*)tss;
 
   LttTime evtime = closure_data->end_time;
-  TimeWindow time_window = 
-    lttvwindow_get_time_window(control_flow_data->tab);
-
-  LttTime end_time = ltt_time_add(time_window.start_time,
-                                    time_window.time_width);
-
-  if(ltt_time_compare(evtime, time_window.start_time) == -1
-        || ltt_time_compare(evtime, end_time) == 1)
-            return;
-
-  guint width = drawing->width;
 
   { 
     /* For the process */
@@ -2204,73 +2121,79 @@ void draw_closure(gpointer key, gpointer value, gpointer user_data)
      * draw items from the beginning of the read for it. If it is not
      * present, it's a new process and it was not present : it will
      * be added after the state update.  */
+#ifdef EXTRA_CHECK
     g_assert(lttv_traceset_number(tsc->ts) > 0);
+#endif //EXTRA_CHECK
+    LttvTraceContext *tc = tsc->traces[process_info->trace_num];
+    LttvTraceState *ts = (LttvTraceState*)tc;
 
-    /* tracefiles[0] is ok here, because we draw for every PID, and
-     * assume CPU 0 for PID 0 //FIXME */
-    LttvTracefileState *tfs =
-      (LttvTracefileState*)tsc->traces[process_info->trace_num]->tracefiles[0];
+#if 0
+    //FIXME : optimize data structures.
+    LttvTracefileState *tfs;
+    LttvTracefileContext *tfc;
+    guint i;
+    for(i=0;i<tc->tracefiles->len;i++) {
+      tfc = g_array_index(tc->tracefiles, LttvTracefileContext*, i);
+      if(ltt_tracefile_name(tfc->tf) == LTT_NAME_CPU
+          && ltt_tracefile_num(tfc->tf) == process_info->cpu)
+        break;
 
+    }
+    g_assert(i<tc->tracefiles->len);
+    tfs = LTTV_TRACEFILE_STATE(tfc);
+#endif //0
+ //   LttvTracefileState *tfs =
+ //    (LttvTracefileState*)tsc->traces[process_info->trace_num]->
+ //                        tracefiles[process_info->cpu];
     LttvProcessState *process;
-    process = lttv_state_find_process(tfs,
+    process = lttv_state_find_process(ts, process_info->cpu,
                                       process_info->pid);
 
-    if(process != NULL) {
+    if(unlikely(process != NULL)) {
       
       /* Only draw for processes that are currently in the trace states */
 
-      guint y = 0, height = 0, pl_height = 0;
-      ProcessList *process_list = 
-                      guicontrolflow_get_process_list(control_flow_data);
-      LttTime birth = process_info->birth;
-      
+      ProcessList *process_list = control_flow_data->process_list;
+#ifdef EXTRA_CHECK
       /* Should be alike when background info is ready */
       if(control_flow_data->background_info_waiting==0)
         g_assert(ltt_time_compare(process->creation_time,
                                   process_info->birth) == 0);
-      const gchar *name = g_quark_to_string(process->name);
-      
-      /* process HAS to be present */
-      g_assert(processlist_get_process_pixels(process_list,
-              process_info->pid,
-              &birth,
-              process_info->trace_num,
-              &y,
-              &height,
-              &hashed_process_data) != 1);
+#endif //EXTRA_CHECK
     
       /* Now, the process is in the state hash and our own process hash.
        * We definitely can draw the items related to the ending state.
        */
       
-      /* Check if the x position is unset. In can have been left unset by
-       * a draw closure from a after chunk hook. This should never happen,
-       * because it must be set by before chunk hook to the damage_begin
-       * value.
-       */
-      g_assert(hashed_process_data->x != -1);
+      if(unlikely(ltt_time_compare(hashed_process_data->next_good_time,
+                            evtime) <= 0))
       {
-        guint x;
-        DrawContext draw_context;
+        TimeWindow time_window = 
+          lttvwindow_get_time_window(control_flow_data->tab);
 
-        convert_time_to_pixels(
-            time_window.start_time,
-            end_time,
-            evtime,
-            width,
-            &x);
+#ifdef EXTRA_CHECK
+        if(ltt_time_compare(evtime, time_window.start_time) == -1
+              || ltt_time_compare(evtime, time_window.end_time) == 1)
+                  return;
+#endif //EXTRA_CHECK
+        Drawing_t *drawing = control_flow_data->drawing;
+        guint width = drawing->width;
+
+        guint x = closure_data->x_end;
+
+        DrawContext draw_context;
 
         /* Now create the drawing context that will be used to draw
          * items related to the last state. */
-        draw_context.drawable = drawing->pixmap;
+        draw_context.drawable = hashed_process_data->pixmap;
         draw_context.gc = drawing->gc;
         draw_context.pango_layout = drawing->pango_layout;
-        draw_context.drawinfo.start.x = hashed_process_data->x;
         draw_context.drawinfo.end.x = x;
 
-        draw_context.drawinfo.y.over = y;
-        draw_context.drawinfo.y.middle = y+(height/4);
-        draw_context.drawinfo.y.under = y+(height/2)+2;
+        draw_context.drawinfo.y.over = 1;
+        draw_context.drawinfo.y.middle = (hashed_process_data->height/2);
+        draw_context.drawinfo.y.under = hashed_process_data->height;
 
         draw_context.drawinfo.start.offset.over = 0;
         draw_context.drawinfo.start.offset.middle = 0;
@@ -2278,18 +2201,52 @@ void draw_closure(gpointer key, gpointer value, gpointer user_data)
         draw_context.drawinfo.end.offset.over = 0;
         draw_context.drawinfo.end.offset.middle = 0;
         draw_context.drawinfo.end.offset.under = 0;
-
+#if 0
+        /* Jump over draw if we are at the same x position */
+        if(x == hashed_process_data->x.over)
         {
+          /* jump */
+        } else {
+          draw_context.drawinfo.start.x = hashed_process_data->x.over;
           /* Draw the line */
-          PropertiesLine prop_line = prepare_line(process);
+          PropertiesLine prop_line = prepare_execmode_line(process);
           draw_line((void*)&prop_line, (void*)&draw_context);
 
+          hashed_process_data->x.over = x;
         }
+#endif //0
 
-        /* special case LTTV_STATE_WAIT : CPU is unknown. */
-        
-        /* become the last x position */
-        hashed_process_data->x = x;
+        if(unlikely(x == hashed_process_data->x.middle &&
+            hashed_process_data->x.middle_used)) {
+#if 0 /* do not mark closure : not missing information */
+          if(hashed_process_data->x.middle_marked == FALSE) {
+            /* Draw collision indicator */
+            gdk_gc_set_foreground(drawing->gc, &drawing_colors[COL_WHITE]);
+            gdk_draw_point(drawing->pixmap,
+                           drawing->gc,
+                           x,
+                           y+(height/2)-3);
+            hashed_process_data->x.middle_marked = TRUE;
+          }
+#endif //0
+          /* Jump */
+        } else {
+          draw_context.drawinfo.start.x = hashed_process_data->x.middle;
+          /* Draw the line */
+          PropertiesLine prop_line = prepare_s_e_line(process);
+          draw_line((void*)&prop_line, (void*)&draw_context);
+
+           /* become the last x position */
+          if(likely(x != hashed_process_data->x.middle)) {
+            hashed_process_data->x.middle = x;
+            /* but don't use the pixel */
+            hashed_process_data->x.middle_used = FALSE;
+
+            /* Calculate the next good time */
+            convert_pixels_to_time(width, x+1, time_window,
+                                  &hashed_process_data->next_good_time);
+          }
+        }
       }
     }
   }
@@ -2299,8 +2256,15 @@ void draw_closure(gpointer key, gpointer value, gpointer user_data)
 int before_chunk(void *hook_data, void *call_data)
 {
   EventsRequest *events_request = (EventsRequest*)hook_data;
-  LttvTracesetState *tss = LTTV_TRACESET_STATE(call_data);
-
+  LttvTracesetState *tss = (LttvTracesetState*)call_data;
+  ControlFlowData *cfd = (ControlFlowData*)events_request->viewer_data;
+#if 0  
+  /* Desactivate sort */
+  gtk_tree_sortable_set_sort_column_id(
+      GTK_TREE_SORTABLE(cfd->process_list->list_store),
+      TRACE_COLUMN,
+      GTK_SORT_ASCENDING);
+#endif //0
   drawing_chunk_begin(events_request, tss);
 
   return 0;
@@ -2309,8 +2273,8 @@ int before_chunk(void *hook_data, void *call_data)
 int before_request(void *hook_data, void *call_data)
 {
   EventsRequest *events_request = (EventsRequest*)hook_data;
-  LttvTracesetState *tss = LTTV_TRACESET_STATE(call_data);
-
+  LttvTracesetState *tss = (LttvTracesetState*)call_data;
   drawing_data_request_begin(events_request, tss);
 
   return 0;
@@ -2330,11 +2294,9 @@ int after_request(void *hook_data, void *call_data)
 {
   EventsRequest *events_request = (EventsRequest*)hook_data;
   ControlFlowData *control_flow_data = events_request->viewer_data;
-  LttvTracesetState *tss = LTTV_TRACESET_STATE(call_data);
-  LttvTracesetContext *tsc = LTTV_TRACESET_CONTEXT(call_data);
+  LttvTracesetState *tss = (LttvTracesetState*)call_data;
   
-  ProcessList *process_list =
-    guicontrolflow_get_process_list(control_flow_data);
+  ProcessList *process_list = control_flow_data->process_list;
   LttTime end_time = events_request->end_time;
 
   ClosureData closure_data;
@@ -2342,9 +2304,20 @@ int after_request(void *hook_data, void *call_data)
   closure_data.tss = tss;
   closure_data.end_time = end_time;
 
+  TimeWindow time_window = 
+          lttvwindow_get_time_window(control_flow_data->tab);
+  guint width = control_flow_data->drawing->width;
+  convert_time_to_pixels(
+            time_window,
+            end_time,
+            width,
+            &closure_data.x_end);
+
+
   /* Draw last items */
   g_hash_table_foreach(process_list->process_hash, draw_closure,
                         (void*)&closure_data);
+  
 
   /* Request expose */
   drawing_request_expose(events_request, tss, end_time);
@@ -2360,14 +2333,16 @@ int after_chunk(void *hook_data, void *call_data)
 {
   EventsRequest *events_request = (EventsRequest*)hook_data;
   ControlFlowData *control_flow_data = events_request->viewer_data;
-  LttvTracesetState *tss = LTTV_TRACESET_STATE(call_data);
-  LttvTracesetContext *tsc = LTTV_TRACESET_CONTEXT(call_data);
+  LttvTracesetState *tss = (LttvTracesetState*)call_data;
+  LttvTracesetContext *tsc = (LttvTracesetContext*)call_data;
   LttvTracefileContext *tfc = lttv_traceset_context_get_current_tfc(tsc);
   LttTime end_time;
   
-  ProcessList *process_list =
-    guicontrolflow_get_process_list(control_flow_data);
+  ProcessList *process_list = control_flow_data->process_list;
 
+  g_free(process_list->current_hash_data);
+  process_list->current_hash_data = NULL;
+  
   if(tfc != NULL)
     end_time = LTT_TIME_MIN(tfc->timestamp, events_request->end_time);
   else /* end of traceset, or position now out of request : end */
@@ -2378,11 +2353,30 @@ int after_chunk(void *hook_data, void *call_data)
   closure_data.tss = tss;
   closure_data.end_time = end_time;
 
+  TimeWindow time_window = 
+          lttvwindow_get_time_window(control_flow_data->tab);
+  guint width = control_flow_data->drawing->width;
+  convert_time_to_pixels(
+            time_window,
+            end_time,
+            width,
+            &closure_data.x_end);
+
   /* Draw last items */
   g_hash_table_foreach(process_list->process_hash, draw_closure,
                         (void*)&closure_data);
-
-  /* Request expose */
+#if 0
+  /* Reactivate sort */
+  gtk_tree_sortable_set_sort_column_id(
+      GTK_TREE_SORTABLE(control_flow_data->process_list->list_store),
+      GTK_TREE_SORTABLE_DEFAULT_SORT_COLUMN_ID,
+      GTK_SORT_ASCENDING);
+
+  update_index_to_pixmap(control_flow_data->process_list);
+  /* Request a full expose : drawing scrambled */
+  gtk_widget_queue_draw(control_flow_data->drawing->drawing_area);
+#endif //0
+  /* Request expose (updates damages zone also) */
   drawing_request_expose(events_request, tss, end_time);
 
   return 0;
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