* Foundation, Inc., 59 Temple Place - Suite 330, Boston,
* MA 02111-1307, USA.
*/
+
+ /******************************************************************
+
+ The standard deviation calculation is based on:
+ http://en.wikipedia.org/wiki/Standard_deviation
+
+ Standard_deviation = sqrt(1/N Sum ((xi -Xa)^2))
+
+ To compute the standard deviation, we need to make EventRequests to LTTV. In
+ the first EventRequest, we compute the average duration (Xa) and the
+ frequency (N) of each IrqID. We store the information calculated in the first
+ EventRequest in an array called FirstRequestIrqExit.
+ In the second EventRequest, we compute the Sum ((xi -Xa)^2) and store this information
+ in a array called SumArray. The function CalculateDurationStandardDeviation() uses FirstRequestIrqExit
+ and SumArray arrays to calculate the standard deviation.
+
+
+
+CPUID: processor ID
+
+IrqId: IRQ ID
+
+Frequency (Hz): the number of interruptions per second (Hz)
+
+Total Duration (nsec): the sum of each interrupt duration in nsec
+
+Duration standard deviation (nsec): taken from http://en.wikipedia.org/wiki/Standard_deviation
+Duration Standard_deviation = sqrt(1/N Sum ((xi -Xa)^2)) where
+N: number of interrupts
+xi: duration of an interrupt (nsec)
+Xa: average duration (nsec)
+
+Max IRQ handler duration (nsec) [time interval]: the longest IRQ handler duration in nsec.
+
+Average period (nsec): 1/frequency
+
+
+Period Standard_deviation = sqrt(1/N Sum ((xi -Xa)^2)) where
+N: number of interrupts
+xi: 1/duration of an interrupt
+Xa: 1/frequency
+
+ *******************************************************************/
#include <gdk/gdk.h>
#include <stdio.h>
#include <stdlib.h>
+#include <math.h>
#include <string.h>
#include <ltt/ltt.h>
#include <ltt/event.h>
#define g_debug(format...) g_log (G_LOG_DOMAIN, G_LOG_LEVEL_DEBUG, format)
#define NO_ITEMS 0
+typedef struct
+{
+ LttTime duration;
+ LttTime start_time;
+ LttTime end_time;
+}MaxDuration;
+
typedef struct {
guint cpu_id;
guint id;
guint frequency;
LttTime total_duration;
+ guint average_duration;
+ MaxDuration max_irq_handler;
+
}Irq;
typedef struct {
LttTime event_time;
}irq_entry;
+
+typedef struct
+{
+ guint irqId;
+ guint frequency;
+ guint64 sumOfDurations;
+ guint64 sumOfPeriods;
+
+}SumId;
+
enum type_t {
IRQ_ENTRY,
IRQ_EXIT
LttvHooks * hooks_trace_before;
TimeWindow time_window;
LttvHooksById * event_by_id_hooks;
- GArray *interrupt_counters;
- GArray *active_irq_entry ;
+ GArray *FirstRequestIrqExit;
+ GArray *FirstRequestIrqEntry;
+ GArray *SecondRequestIrqEntry;
+ GArray *SecondRequestIrqExit;
+ GArray *SumArray;
+
} InterruptEventData ;
static GtkWidget *interrupts(Tab *tab);
static InterruptEventData *system_info(Tab *tab);
void interrupt_destructor(InterruptEventData *event_viewer_data);
-static void request_event(InterruptEventData *event_data );
+static void FirstRequest(InterruptEventData *event_data );
static guint64 get_interrupt_id(LttEvent *e);
static gboolean trace_header(void *hook_data, void *call_data);
-static gboolean interrupt_display (void *hook_data, void *call_data);
-static void calcul_duration(LttTime time_exit, guint cpu_id, InterruptEventData *event_data);
-static void sum_interrupt_data(irq_entry *e, LttTime time_exit, GArray *interrupt_counters);
-static gboolean irq_entry_callback(void *hook_data, void *call_data);
-static gboolean irq_exit_callback(void *hook_data, void *call_data);
-
+static gboolean DisplayViewer (void *hook_data, void *call_data);
+static void CalculateData(LttTime time_exit, guint cpu_id, InterruptEventData *event_data);
+static void TotalDurationMaxIrqDuration(irq_entry *e, LttTime time_exit, GArray *FirstRequestIrqExit);
+static gboolean FirstRequestIrqEntryCallback(void *hook_data, void *call_data);
+static gboolean FirstRequestIrqExitCallback(void *hook_data, void *call_data);
+static gboolean SecondRequest(void *hook_data, void *call_data);
+static void CalculateAverageDurationForEachIrqId(InterruptEventData *event_data);
+static gboolean SecondRequestIrqEntryCallback(void *hook_data, void *call_data);
+static gboolean SecondRequestIrqExitCallback(void *hook_data, void *call_data);
+static void CalculateXi(LttEvent *event, InterruptEventData *event_data);
+static void SumItems(gint irq_id, LttTime Xi, InterruptEventData *event_data);
+static int CalculateDurationStandardDeviation(gint id, InterruptEventData *event_data);
+static int CalculatePeriodStandardDeviation(gint id, InterruptEventData *event_data);
+static int FrequencyInHZ(gint frequency, TimeWindow time_window);
+static guint64 CalculatePeriodInnerPart(guint Xi, guint FrequencyHZ);
/* Enumeration of the columns */
enum{
CPUID_COLUMN,
IRQ_ID_COLUMN,
FREQUENCY_COLUMN,
DURATION_COLUMN,
+ DURATION_STANDARD_DEV_COLUMN,
+ MAX_IRQ_HANDLER_COLUMN,
+ AVERAGE_PERIOD,
+ PERIOD_STANDARD_DEV_COLUMN,
N_COLUMNS
};
*/
InterruptEventData *system_info(Tab *tab)
{
+
LttTime end;
GtkTreeViewColumn *column;
GtkCellRenderer *renderer;
InterruptEventData* event_viewer_data = g_new(InterruptEventData,1) ;
-
-
+
event_viewer_data->tab = tab;
/*Get the current time frame from the main window */
event_viewer_data->time_window = lttvwindow_get_time_window(tab);
- event_viewer_data->interrupt_counters = g_array_new(FALSE, FALSE, sizeof(Irq));
- event_viewer_data->active_irq_entry = g_array_new(FALSE, FALSE, sizeof(irq_entry));
+
+ event_viewer_data->FirstRequestIrqExit = g_array_new(FALSE, FALSE, sizeof(Irq));
+ event_viewer_data->FirstRequestIrqEntry = g_array_new(FALSE, FALSE, sizeof(irq_entry));
+
+ event_viewer_data->SecondRequestIrqEntry = g_array_new(FALSE, FALSE, sizeof(irq_entry));
+ event_viewer_data->SecondRequestIrqExit = g_array_new(FALSE, FALSE, sizeof(Irq));
+
+ event_viewer_data->SumArray = g_array_new(FALSE, FALSE, sizeof(SumId));
+
+
/*Create tha main window for the viewer */
event_viewer_data->ScrollWindow = gtk_scrolled_window_new (NULL, NULL);
gtk_widget_show (event_viewer_data->ScrollWindow);
G_TYPE_INT, /* CPUID */
G_TYPE_INT, /* IRQ_ID */
G_TYPE_INT, /* Frequency */
- G_TYPE_UINT64 /* Duration */
+ G_TYPE_UINT64, /* Duration */
+ G_TYPE_INT, /* standard deviation */
+ G_TYPE_STRING, /* Max IRQ handler */
+ G_TYPE_INT, /* Average period */
+ G_TYPE_INT /* period standard deviation */
);
event_viewer_data->TreeView = gtk_tree_view_new_with_model (GTK_TREE_MODEL (event_viewer_data->ListStore));
gtk_tree_view_append_column (GTK_TREE_VIEW (event_viewer_data->TreeView), column);
renderer = gtk_cell_renderer_text_new ();
- column = gtk_tree_view_column_new_with_attributes ("Frequency",
+ column = gtk_tree_view_column_new_with_attributes ("Frequency (Hz)",
renderer,
"text", FREQUENCY_COLUMN,
NULL);
gtk_tree_view_append_column (GTK_TREE_VIEW (event_viewer_data->TreeView), column);
renderer = gtk_cell_renderer_text_new ();
- column = gtk_tree_view_column_new_with_attributes ("Duration (nsec)",
+ column = gtk_tree_view_column_new_with_attributes ("Total Duration (nsec)",
renderer,
"text", DURATION_COLUMN,
NULL);
gtk_tree_view_column_set_fixed_width (column, 145);
gtk_tree_view_append_column (GTK_TREE_VIEW (event_viewer_data->TreeView), column);
+
+ renderer = gtk_cell_renderer_text_new ();
+ column = gtk_tree_view_column_new_with_attributes ("Duration standard deviation (nsec)",
+ renderer,
+ "text", DURATION_STANDARD_DEV_COLUMN,
+ NULL);
+ gtk_tree_view_column_set_alignment (column, 0.0);
+ gtk_tree_view_column_set_fixed_width (column, 200);
+ gtk_tree_view_append_column (GTK_TREE_VIEW (event_viewer_data->TreeView), column);
+
+ renderer = gtk_cell_renderer_text_new ();
+ column = gtk_tree_view_column_new_with_attributes ("Max IRQ handler duration (nsec) [time interval]",
+ renderer,
+ "text", MAX_IRQ_HANDLER_COLUMN,
+ NULL);
+ gtk_tree_view_column_set_alignment (column, 0.0);
+ gtk_tree_view_column_set_fixed_width (column, 250);
+ gtk_tree_view_append_column (GTK_TREE_VIEW (event_viewer_data->TreeView), column);
+
+ renderer = gtk_cell_renderer_text_new ();
+ column = gtk_tree_view_column_new_with_attributes (" Average period (nsec)",
+ renderer,
+ "text", AVERAGE_PERIOD,
+ NULL);
+ gtk_tree_view_column_set_alignment (column, 0.0);
+ gtk_tree_view_column_set_fixed_width (column, 200);
+ gtk_tree_view_append_column (GTK_TREE_VIEW (event_viewer_data->TreeView), column);
+
+ renderer = gtk_cell_renderer_text_new ();
+ column = gtk_tree_view_column_new_with_attributes ("Period standard deviation (nsec)",
+ renderer,
+ "text", PERIOD_STANDARD_DEV_COLUMN,
+ NULL);
+ gtk_tree_view_column_set_alignment (column, 0.0);
+ gtk_tree_view_column_set_fixed_width (column, 200);
+ gtk_tree_view_append_column (GTK_TREE_VIEW (event_viewer_data->TreeView), column);
+
+
+
event_viewer_data->SelectionTree = gtk_tree_view_get_selection (GTK_TREE_VIEW (event_viewer_data->TreeView));
gtk_tree_selection_set_mode (event_viewer_data->SelectionTree, GTK_SELECTION_SINGLE);
event_viewer_data);
- request_event(event_viewer_data );
+ FirstRequest(event_viewer_data );
return event_viewer_data;
}
* time interval to the main window
*
*/
-static void request_event(InterruptEventData *event_data )
+static void FirstRequest(InterruptEventData *event_data )
{
guint i, k, l, nb_trace;
lttv_hooks_add(event_data->hooks_trace_before, trace_header, event_data, LTTV_PRIO_DEFAULT);
event_data->hooks_trace_after = lttv_hooks_new();
- /* Registers a hook function */
- lttv_hooks_add(event_data->hooks_trace_after, interrupt_display, event_data, LTTV_PRIO_DEFAULT);
+
+ /* Registers a hook function */
+ lttv_hooks_add(event_data->hooks_trace_after, SecondRequest, event_data, LTTV_PRIO_DEFAULT);
/* Get a trace state */
ts = (LttvTraceState *)tsc->traces[i];
/* Create event_by_Id hooks */
ret = lttv_trace_find_hook(ts->parent.t,
LTT_FACILITY_KERNEL, LTT_EVENT_IRQ_ENTRY,
LTT_FIELD_IRQ_ID, 0, 0,
- irq_entry_callback,
+ FirstRequestIrqEntryCallback,
events_request,
&g_array_index(hooks, LttvTraceHook, 0));
ret = lttv_trace_find_hook(ts->parent.t,
LTT_FACILITY_KERNEL, LTT_EVENT_IRQ_EXIT,
LTT_FIELD_IRQ_ID, 0, 0,
- irq_exit_callback,
+ FirstRequestIrqExitCallback,
events_request,
&g_array_index(hooks, LttvTraceHook, 1));
events_request->event = NULL;
events_request->event_by_id = event_data->event_by_id_hooks;
events_request->after_chunk_tracefile = NULL;
- events_request->after_chunk_trace = NULL;
+ events_request->after_chunk_trace = NULL;
events_request->after_chunk_traceset = NULL;
- events_request->before_request = NULL;
+ events_request->before_request = NULL;
events_request->after_request = event_data->hooks_trace_after;
lttvwindow_events_request(event_data->tab, events_request);
* This function is called whenever an irq_entry event occurs.
*
*/
-static gboolean irq_entry_callback(void *hook_data, void *call_data)
+static gboolean FirstRequestIrqEntryCallback(void *hook_data, void *call_data)
{
LttTime event_time;
LttvTracefileContext *tfc = (LttvTracefileContext *)call_data;
LttvTracefileState *tfs = (LttvTracefileState *)call_data;
InterruptEventData *event_data = (InterruptEventData *)hook_data;
- GArray* active_irq_entry = event_data->active_irq_entry;
+ GArray* FirstRequestIrqEntry = event_data->FirstRequestIrqEntry;
LttEvent *e = ltt_tracefile_get_event(tfc->tf);
event_time = ltt_event_time(e);
cpu_id = ltt_event_cpu_id(e);
- if ((ltt_time_compare(event_time,event_data->time_window.start_time) == TRUE) &&
- (ltt_time_compare(event_data->time_window.end_time,event_time) == TRUE))
- {
- entry.id =get_interrupt_id(e);
- entry.cpu_id = cpu_id;
- entry.event_time = event_time;
- g_array_append_val (active_irq_entry, entry);
- }
+
+ entry.id =get_interrupt_id(e);
+ entry.cpu_id = cpu_id;
+ entry.event_time = event_time;
+ g_array_append_val (FirstRequestIrqEntry, entry);
+
return FALSE;
}
* This function is called whenever an irq_exit event occurs.
*
*/
-gboolean irq_exit_callback(void *hook_data, void *call_data)
+gboolean FirstRequestIrqExitCallback(void *hook_data, void *call_data)
{
LttTime event_time;
unsigned cpu_id;
LttEventType *type = ltt_event_eventtype(e);
event_time = ltt_event_time(e);
cpu_id = ltt_event_cpu_id(e);
- if ((ltt_time_compare(event_time,event_data->time_window.start_time) == TRUE) &&
- (ltt_time_compare(event_data->time_window.end_time,event_time) == TRUE))
- {
- calcul_duration( event_time, cpu_id, event_data);
-
- }
- return FALSE;
+
+ CalculateData( event_time, cpu_id, event_data);
+
+ return FALSE;
}
/**
* This function calculates the duration of an interrupt.
*
*/
-static void calcul_duration(LttTime time_exit, guint cpu_id,InterruptEventData *event_data){
+static void CalculateData(LttTime time_exit, guint cpu_id,InterruptEventData *event_data)
+{
gint i, irq_id;
irq_entry *element;
LttTime duration;
- GArray *interrupt_counters = event_data->interrupt_counters;
- GArray *active_irq_entry = event_data->active_irq_entry;
- for(i = 0; i < active_irq_entry->len; i++){
- element = &g_array_index(active_irq_entry,irq_entry,i);
- if(element->cpu_id == cpu_id){
- sum_interrupt_data(element,time_exit, interrupt_counters);
- g_array_remove_index(active_irq_entry, i);
+ GArray *FirstRequestIrqExit = event_data->FirstRequestIrqExit;
+ GArray *FirstRequestIrqEntry = event_data->FirstRequestIrqEntry;
+ for(i = 0; i < FirstRequestIrqEntry->len; i++)
+ {
+ element = &g_array_index(FirstRequestIrqEntry,irq_entry,i);
+ if(element->cpu_id == cpu_id)
+ {
+ TotalDurationMaxIrqDuration(element,time_exit, FirstRequestIrqExit);
+ g_array_remove_index(FirstRequestIrqEntry, i);
break;
}
}
-}
+}
+
/**
- * This function calculates the total duration of an interrupt.
+ * This function calculates the total duration of an interrupt and the longest Irq handler.
*
*/
-static void sum_interrupt_data(irq_entry *e, LttTime time_exit, GArray *interrupt_counters){
+static void TotalDurationMaxIrqDuration(irq_entry *e, LttTime time_exit, GArray *FirstRequestIrqExit){
Irq irq;
Irq *element;
guint i;
gboolean notFound = FALSE;
memset ((void*)&irq, 0,sizeof(Irq));
-
- if(interrupt_counters->len == NO_ITEMS){
+ /*first time*/
+ if(FirstRequestIrqExit->len == NO_ITEMS)
+ {
irq.cpu_id = e->cpu_id;
irq.id = e->id;
irq.frequency++;
irq.total_duration = ltt_time_sub(time_exit, e->event_time);
- g_array_append_val (interrupt_counters, irq);
+
+ irq.max_irq_handler.start_time = e->event_time;
+ irq.max_irq_handler.end_time = time_exit;
+ irq.max_irq_handler.duration = ltt_time_sub(time_exit, e->event_time);
+
+ g_array_append_val (FirstRequestIrqExit, irq);
}
- else{
- for(i = 0; i < interrupt_counters->len; i++){
- element = &g_array_index(interrupt_counters,Irq,i);
- if(element->id == e->id){
+ else
+ {
+ for(i = 0; i < FirstRequestIrqExit->len; i++)
+ {
+ element = &g_array_index(FirstRequestIrqExit,Irq,i);
+ if(element->id == e->id)
+ {
notFound = TRUE;
duration = ltt_time_sub(time_exit, e->event_time);
element->total_duration = ltt_time_add(element->total_duration, duration);
element->frequency++;
+ if(ltt_time_compare(duration,element->max_irq_handler.duration) > 0)
+ {
+ element->max_irq_handler.duration = duration;
+ element->max_irq_handler.start_time = e->event_time;
+ element->max_irq_handler.end_time = time_exit;
+ }
}
}
- if(!notFound){
+ if(!notFound)
+ {
irq.cpu_id = e->cpu_id;
irq.id = e->id;
irq.frequency++;
irq.total_duration = ltt_time_sub(time_exit, e->event_time);
- g_array_append_val (interrupt_counters, irq);
+
+ irq.max_irq_handler.start_time = e->event_time;
+ irq.max_irq_handler.end_time = time_exit;
+ irq.max_irq_handler.duration = ltt_time_sub(time_exit, e->event_time);
+
+ g_array_append_val (FirstRequestIrqExit, irq);
}
}
+}
+
+/**
+ * This function passes the second EventsRequest to LTTV
+ *
+ */
+static gboolean SecondRequest(void *hook_data, void *call_data)
+{
+
+ guint i, k, l, nb_trace;
+
+ LttvTraceHook *hook;
+
+ guint ret;
+
+ LttvTraceState *ts;
+
+ GArray *hooks;
+
+ EventsRequest *events_request;
+
+ LttvTraceHookByFacility *thf;
+
+ InterruptEventData *event_data = (InterruptEventData *)hook_data;
+
+ LttvTracesetContext *tsc = lttvwindow_get_traceset_context(event_data->tab);
+
+ CalculateAverageDurationForEachIrqId(event_data);
+
+ /* Get the traceset */
+ LttvTraceset *traceset = tsc->ts;
+
+ nb_trace = lttv_traceset_number(traceset);
+
+ /* There are many traces in a traceset. Iteration for each trace. */
+ for(i = 0; i<MIN(TRACE_NUMBER+1, nb_trace);i++)
+ {
+ events_request = g_new(EventsRequest, 1);
+
+ hooks = g_array_new(FALSE, FALSE, sizeof(LttvTraceHook));
+
+ hooks = g_array_set_size(hooks, 2);
+
+ event_data->hooks_trace_after = lttv_hooks_new();
+
+ /* Registers a hook function */
+ lttv_hooks_add(event_data->hooks_trace_after, DisplayViewer, event_data, LTTV_PRIO_DEFAULT);
+
+ /* Get a trace state */
+ ts = (LttvTraceState *)tsc->traces[i];
+ /* Create event_by_Id hooks */
+ event_data->event_by_id_hooks = lttv_hooks_by_id_new();
+
+ /*Register event_by_id_hooks with a callback function*/
+ ret = lttv_trace_find_hook(ts->parent.t,
+ LTT_FACILITY_KERNEL, LTT_EVENT_IRQ_ENTRY,
+ LTT_FIELD_IRQ_ID, 0, 0,
+ SecondRequestIrqEntryCallback,
+ events_request,
+ &g_array_index(hooks, LttvTraceHook, 0));
+
+ ret = lttv_trace_find_hook(ts->parent.t,
+ LTT_FACILITY_KERNEL, LTT_EVENT_IRQ_EXIT,
+ LTT_FIELD_IRQ_ID, 0, 0,
+ SecondRequestIrqExitCallback,
+ events_request,
+ &g_array_index(hooks, LttvTraceHook, 1));
+
+ g_assert(!ret);
+
+ /* iterate through the facility list */
+ for(k = 0 ; k < hooks->len; k++)
+ {
+ hook = &g_array_index(hooks, LttvTraceHook, k);
+ for(l=0; l<hook->fac_list->len; l++)
+ {
+ thf = g_array_index(hook->fac_list, LttvTraceHookByFacility*, l);
+ lttv_hooks_add(lttv_hooks_by_id_find(event_data->event_by_id_hooks, thf->id),
+ thf->h,
+ event_data,
+ LTTV_PRIO_DEFAULT);
+
+ }
+ }
+ /* Initalize the EventsRequest structure */
+ events_request->owner = event_data;
+ events_request->viewer_data = event_data;
+ events_request->servicing = FALSE;
+ events_request->start_time = event_data->time_window.start_time;
+ events_request->start_position = NULL;
+ events_request->stop_flag = FALSE;
+ events_request->end_time = event_data->time_window.end_time;
+ events_request->num_events = G_MAXUINT;
+ events_request->end_position = NULL;
+ events_request->trace = i;
+
+ events_request->hooks = hooks;
+
+ events_request->before_chunk_traceset = NULL;
+ events_request->before_chunk_trace = NULL;
+ events_request->before_chunk_tracefile= NULL;
+ events_request->event = NULL;
+ events_request->event_by_id = event_data->event_by_id_hooks;
+ events_request->after_chunk_tracefile = NULL;
+ events_request->after_chunk_trace = NULL;
+ events_request->after_chunk_traceset = NULL;
+ events_request->before_request = NULL;
+ events_request->after_request = event_data->hooks_trace_after;
+
+ lttvwindow_events_request(event_data->tab, events_request);
+ }
+ return FALSE;
+}
+
+static void CalculateAverageDurationForEachIrqId(InterruptEventData *event_data)
+{
+ guint64 real_data;
+ Irq *element;
+ gint i;
+ GArray* FirstRequestIrqExit = event_data->FirstRequestIrqExit;
+ for(i = 0; i < FirstRequestIrqExit->len; i++)
+ {
+ element = &g_array_index(FirstRequestIrqExit,Irq,i);
+ real_data = element->total_duration.tv_sec;
+ real_data *= NANOSECONDS_PER_SECOND;
+ real_data += element->total_duration.tv_nsec;
+ element->average_duration = real_data / element->frequency;
+ }
+
+}
+
+/**
+ * This function is called whenever an irq_entry event occurs. Use in the second request
+ *
+ */
+static gboolean SecondRequestIrqEntryCallback(void *hook_data, void *call_data)
+{
+
+ LttTime event_time;
+ unsigned cpu_id;
+ irq_entry entry;
+ LttvTracefileContext *tfc = (LttvTracefileContext *)call_data;
+ LttvTracefileState *tfs = (LttvTracefileState *)call_data;
+ InterruptEventData *event_data = (InterruptEventData *)hook_data;
+ GArray* SecondRequestIrqEntry = event_data->SecondRequestIrqEntry;
+ LttEvent *e = ltt_tracefile_get_event(tfc->tf);
+ event_time = ltt_event_time(e);
+ cpu_id = ltt_event_cpu_id(e);
+
+
+ entry.id =get_interrupt_id(e);
+ entry.cpu_id = cpu_id;
+ entry.event_time = event_time;
+ g_array_append_val (SecondRequestIrqEntry, entry);
+
+ return FALSE;
+}
+
+/**
+ * This function is called whenever an irq_exit event occurs in the second request.
+ *
+ */
+static gboolean SecondRequestIrqExitCallback(void *hook_data, void *call_data)
+{
+
+ LttvTracefileContext *tfc = (LttvTracefileContext *)call_data;
+ LttvTracefileState *tfs = (LttvTracefileState *)call_data;
+ InterruptEventData *event_data = (InterruptEventData *)hook_data;
+ LttEvent *event = ltt_tracefile_get_event(tfc->tf);
+
+ CalculateXi(event, event_data);
+ return FALSE;
+}
+
+
+/**
+ * This function is called whenever an irq_exit event occurs in the second request.
+ *
+ */
+static void CalculateXi(LttEvent *event_irq_exit, InterruptEventData *event_data)
+{
+ gint i, irq_id;
+ irq_entry *element;
+ LttTime Xi;
+ LttTime exit_time;
+ unsigned cpu_id;
+
+ GArray *SecondRequestIrqExit = event_data->SecondRequestIrqExit;
+ GArray *SecondRequestIrqEntry = event_data->SecondRequestIrqEntry;
+ cpu_id = ltt_event_cpu_id(event_irq_exit);
+ for(i = 0; i < SecondRequestIrqEntry->len; i++)
+ {
+ element = &g_array_index(SecondRequestIrqEntry,irq_entry,i);
+ if(element->cpu_id == cpu_id)
+ {
+
+ /* time calculation */
+ exit_time = ltt_event_time(event_irq_exit);
+ Xi = ltt_time_sub(exit_time, element->event_time);
+ irq_id = element->id;
+
+ SumItems(irq_id, Xi,event_data);
+ g_array_remove_index(SecondRequestIrqEntry, i);
+ break;
+ }
+ }
+}
+
+
+/**
+ * This function computes the Sum ((xi -Xa)^2) and store the result in SumArray
+ *
+ */
+static void SumItems(gint irq_id, LttTime Xi, InterruptEventData *event_data)
+{
+ gint i;
+ guint Xi_in_ns;
+
+ gint duration_inner_part;
+ guint64 period_inner_part;
+ Irq *average;
+ SumId *sumItem;
+ SumId sum;
+ int FrequencyHZ = 0;
+ gboolean notFound = FALSE;
+ GArray *FirstRequestIrqExit = event_data->FirstRequestIrqExit;
+ GArray *SumArray = event_data->SumArray;
+ Xi_in_ns = Xi.tv_sec;
+ Xi_in_ns *= NANOSECONDS_PER_SECOND;
+ Xi_in_ns += Xi.tv_nsec;
+
+ for(i = 0; i < FirstRequestIrqExit->len; i++)
+ {
+ average = &g_array_index(FirstRequestIrqExit,Irq,i);
+ if(irq_id == average->id)
+ {
+ duration_inner_part = Xi_in_ns - average->average_duration;
+ FrequencyHZ = FrequencyInHZ(average->frequency, event_data->time_window);
+
+ sum.irqId = irq_id;
+ sum.frequency = average->frequency;
+ sum.sumOfDurations = pow (duration_inner_part , 2);
+ period_inner_part = CalculatePeriodInnerPart(Xi_in_ns, FrequencyHZ);
+ sum.sumOfPeriods = period_inner_part;
+ if(event_data->SumArray->len == NO_ITEMS)
+ {
+ g_array_append_val (SumArray, sum);
+ }
+ else
+ {
+ for(i = 0; i < SumArray->len; i++)
+ {
+ sumItem = &g_array_index(SumArray, SumId, i);
+ if(sumItem->irqId == irq_id)
+ {
+ notFound = TRUE;
+ sumItem->sumOfDurations += sum.sumOfDurations;
+ sumItem->sumOfPeriods += sum.sumOfPeriods;
+ }
+ }
+ if(!notFound)
+ {
+ g_array_append_val (SumArray, sum);
+ }
+
+ }
+
+ }
+ }
+}
+
+static guint64 CalculatePeriodInnerPart(guint Xi, guint FrequencyHZ)
+{
+
+ double periodInSec; /*period in sec*/
+ int periodInNSec;
+ gint difference;
+ guint64 result;
+ periodInSec = (double)1/FrequencyHZ;
+ periodInSec *= NANOSECONDS_PER_SECOND;
+ periodInNSec = (int)periodInSec;
+
+ difference = Xi - periodInNSec;
+ result = pow (difference , 2);
+
+
+ return result;
+
+
+
}
/**
* This function displays the result on the viewer
*
*/
-static gboolean interrupt_display(void *hook_data, void *call_data){
+static gboolean DisplayViewer(void *hook_data, void *call_data)
+{
+ guint average;
gint i;
Irq element;
LttTime average_duration;
GtkTreeIter iter;
guint64 real_data;
+ guint maxIRQduration;
+ double periodInSec;
+ int periodInNsec;
+ char maxIrqHandler[80];
InterruptEventData *event_data = (InterruptEventData *)hook_data;
- GArray *interrupt_counters = event_data->interrupt_counters;
+ GArray *FirstRequestIrqExit = event_data->FirstRequestIrqExit;
+ int FrequencyHZ = 0;
+ periodInSec = 0;
gtk_list_store_clear(event_data->ListStore);
- for(i = 0; i < interrupt_counters->len; i++){
- element = g_array_index(interrupt_counters,Irq,i);
+ for(i = 0; i < FirstRequestIrqExit->len; i++)
+ {
+ element = g_array_index(FirstRequestIrqExit,Irq,i);
real_data = element.total_duration.tv_sec;
real_data *= NANOSECONDS_PER_SECOND;
real_data += element.total_duration.tv_nsec;
+
+
+ maxIRQduration = element.max_irq_handler.duration.tv_sec;
+ maxIRQduration *= NANOSECONDS_PER_SECOND;
+ maxIRQduration += element.max_irq_handler.duration.tv_nsec;
+
+ sprintf(maxIrqHandler, "%d [%d.%d - %d.%d]",maxIRQduration, element.max_irq_handler.start_time.tv_sec, \
+ element.max_irq_handler.start_time.tv_nsec, element.max_irq_handler.end_time.tv_sec, \
+ element.max_irq_handler.end_time.tv_nsec) ;
+ FrequencyHZ = FrequencyInHZ(element.frequency,event_data->time_window);
+
+ if(FrequencyHZ != 0)
+ {
+ periodInSec = (double)1/FrequencyHZ;
+ periodInSec *= NANOSECONDS_PER_SECOND;
+ periodInNsec = (int)periodInSec;
+ //printf("period1:%d\n", periodInNsec);
+ }
+
gtk_list_store_append (event_data->ListStore, &iter);
gtk_list_store_set (event_data->ListStore, &iter,
CPUID_COLUMN, element.cpu_id,
IRQ_ID_COLUMN, element.id,
- FREQUENCY_COLUMN, element.frequency,
+ FREQUENCY_COLUMN, FrequencyHZ,
DURATION_COLUMN, real_data,
+ DURATION_STANDARD_DEV_COLUMN, CalculateDurationStandardDeviation(element.id, event_data),
+ MAX_IRQ_HANDLER_COLUMN, maxIrqHandler,
+ AVERAGE_PERIOD , periodInNsec,
+ PERIOD_STANDARD_DEV_COLUMN, CalculatePeriodStandardDeviation(element.id, event_data),
-1);
+
+
}
- if(event_data->interrupt_counters->len)
- g_array_remove_range (event_data->interrupt_counters,0,event_data->interrupt_counters->len);
- if(event_data->active_irq_entry->len)
- g_array_remove_range (event_data->active_irq_entry,0,event_data->active_irq_entry->len);
+
+ if(event_data->FirstRequestIrqExit->len)
+ {
+ g_array_remove_range (event_data->FirstRequestIrqExit,0,event_data->FirstRequestIrqExit->len);
+ }
+
+ if(event_data->FirstRequestIrqEntry->len)
+ {
+ g_array_remove_range (event_data->FirstRequestIrqEntry,0,event_data->FirstRequestIrqEntry->len);
+ }
+
+ if(event_data->SecondRequestIrqEntry->len)
+ {
+ g_array_remove_range (event_data->SecondRequestIrqEntry,0,event_data->SecondRequestIrqEntry->len);
+ }
+
+ if(event_data->SecondRequestIrqExit->len)
+ {
+ g_array_remove_range (event_data->SecondRequestIrqExit,0, event_data->SecondRequestIrqExit->len);
+ }
+
+ if(event_data->SumArray->len)
+ {
+ g_array_remove_range (event_data->SumArray,0, event_data->SumArray->len);
+ }
+
return FALSE;
}
+
+
+/**
+ * This function converts the number of interrupts over a time window to
+ * frequency in HZ
+ */
+static int FrequencyInHZ(gint frequency, TimeWindow time_window)
+{
+ guint64 frequencyHz = 0;
+ double timeSec; // time in second
+ double result;
+ result = ltt_time_to_double(time_window.time_width);
+ timeSec = (result/NANOSECONDS_PER_SECOND); //time in second
+ frequencyHz = frequency / timeSec;
+ return frequencyHz;
+}
+
+/**
+ * This function calculates the duration standard deviation
+ *
+ */
+static int CalculateDurationStandardDeviation(gint id, InterruptEventData *event_data)
+{
+ int i;
+ SumId sumId;
+ double inner_component;
+ int deviation = 0;
+ for(i = 0; i < event_data->SumArray->len; i++)
+ {
+ sumId = g_array_index(event_data->SumArray, SumId, i);
+ if(id == sumId.irqId)
+ {
+ inner_component = sumId.sumOfDurations/ sumId.frequency;
+ deviation = sqrt(inner_component);
+ return deviation;
+ }
+ }
+ return deviation;
+}
+
+
+/**
+ * This function calculates the period standard deviation
+ *
+ */
+static int CalculatePeriodStandardDeviation(gint id, InterruptEventData *event_data)
+{
+ int i;
+ SumId sumId;
+ guint64 inner_component;
+ guint64 period_standard_deviation = 0;
+ for(i = 0; i < event_data->SumArray->len; i++)
+ {
+ sumId = g_array_index(event_data->SumArray, SumId, i);
+ if(id == sumId.irqId)
+ {
+ inner_component = sumId.sumOfPeriods / sumId.frequency;
+ period_standard_deviation = sqrt(inner_component);
+ }
+ }
+
+ return period_standard_deviation;
+}
/*
* This function is called by the main window
* when the time interval needs to be updated.
g_info("interrupts: interrupt_update_time_window()\n");
Tab *tab = event_data->tab;
lttvwindow_events_request_remove_all(tab, event_data);
- request_event(event_data );
+ FirstRequest(event_data );
return FALSE;
}
InterruptEventData *event_data = (InterruptEventData *)hook_data;
LttvTracefileContext *tfc = (LttvTracefileContext *)call_data;
- printf("trace_header\n" );
LttEvent *e;
LttTime event_time;
return FALSE;
* This function releases the memory reserved by the module and unregisters
* everything that has been registered in the gtkTraceSet API.
*/
-static void destroy() {
+static void destroy()
+{
+
g_info("Destroy interrupts");
g_slist_foreach(interrupt_data_list, interrupt_destroy_walk, NULL );
g_slist_free(interrupt_data_list);
projects / lttv.git / blobdiff