src/cursesdisplay.c

   1 /*
   2  * Copyright (C) 2011 Julien Desfossez
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License Version 2 as
   6  * published by the Free Software Foundation;
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  * GNU General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public License along
  14  * with this program; if not, write to the Free Software Foundation, Inc.,
  15  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  16  */
  17
  18 #include <stdio.h>
  19 #include <stdlib.h>
  20 #include <signal.h>
  21 #include <string.h>
  22 #include <ncurses.h>
  23 #include <panel.h>
  24 #include <pthread.h>
  25 #include <semaphore.h>
  26
  27 #include "cursesdisplay.h"
  28 #include "lttngtoptypes.h"
  29 #include "iostreamtop.h"
  30 #include "common.h"
  31
  32 #define DEFAULT_DELAY 15
  33 #define MAX_LINE_LENGTH 50
  34 #define MAX_LOG_LINES 4
  35
  36 /* to prevent concurrent updates of the different windows */
  37 sem_t update_display_sem;
  38
  39 char *termtype;
  40 WINDOW *footer, *header, *center, *status;
  41 WINDOW *perf_panel_window = NULL;
  42 PANEL *perf_panel, *main_panel;
  43
  44 int perf_panel_visible = 0;
  45 int perf_line_selected = 0;
  46
  47 int last_display_index, currently_displayed_index;
  48
  49 struct processtop *selected_process = NULL;
  50 int selected_tid;
  51 char *selected_comm;
  52 int selected_ret;
  53
  54 int selected_line = 0; /* select bar position */
  55 int selected_in_list = 0; /* selection relative to the whole list */
  56 int list_offset = 0; /* first index in the list to display (scroll) */
  57 int nb_log_lines = 0;
  58 char log_lines[MAX_LINE_LENGTH * MAX_LOG_LINES + MAX_LOG_LINES];
  59
  60 int max_elements = 80;
  61
  62 int toggle_threads = -1;
  63 int toggle_pause = -1;
  64 int toggle_tree = -1;
  65
  66 int max_center_lines;
  67
  68 pthread_t keyboard_thread;
  69
  70 void reset_ncurses()
  71 {
  72         curs_set(1);
  73         endwin();
  74         exit(0);
  75 }
  76
  77 static void handle_sigterm(int signal)
  78 {
  79         reset_ncurses();
  80 }
  81
  82 void init_screen()
  83 {
  84         initscr();
  85         noecho();
  86         halfdelay(DEFAULT_DELAY);
  87         nonl();
  88         intrflush(stdscr, false);
  89         keypad(stdscr, true);
  90         curs_set(0);
  91
  92         if (has_colors()) {
  93                 start_color();
  94                 init_pair(1, COLOR_RED, COLOR_BLACK); /* - */
  95                 init_pair(2, COLOR_GREEN, COLOR_BLACK); /* + */
  96                 init_pair(3, COLOR_BLACK, COLOR_WHITE); /* keys */
  97                 init_pair(4, COLOR_WHITE, COLOR_GREEN); /* keys activated */
  98                 init_pair(5, COLOR_WHITE, COLOR_BLUE); /* select line */
  99         }
 100         termtype = getenv("TERM");
 101         if (!strcmp(termtype, "xterm") ||  !strcmp(termtype, "xterm-color") ||
 102                         !strcmp(termtype, "vt220")) {
 103                 define_key("\033[H", KEY_HOME);
 104                 define_key("\033[F", KEY_END);
 105                 define_key("\033OP", KEY_F(1));
 106                 define_key("\033OQ", KEY_F(2));
 107                 define_key("\033OR", KEY_F(3));
 108                 define_key("\033OS", KEY_F(4));
 109                 define_key("\0330U", KEY_F(6));
 110                 define_key("\033[11~", KEY_F(1));
 111                 define_key("\033[12~", KEY_F(2));
 112                 define_key("\033[13~", KEY_F(3));
 113                 define_key("\033[14~", KEY_F(4));
 114                 define_key("\033[16~", KEY_F(6));
 115                 define_key("\033[17;2~", KEY_F(18));
 116         }
 117         signal(SIGTERM, handle_sigterm);
 118         mousemask(BUTTON1_CLICKED, NULL);
 119         refresh();
 120 }
 121
 122 WINDOW *create_window(int height, int width, int startx, int starty)
 123 {
 124         WINDOW *win;
 125         win = newwin(height, width, startx, starty);
 126         box(win, 0 , 0);
 127         wrefresh(win);
 128         return win;
 129 }
 130
 131 WINDOW *create_window_no_border(int height, int width, int startx, int starty)
 132 {
 133         WINDOW *win;
 134         win = newwin(height, width, startx, starty);
 135         wrefresh(win);
 136         return win;
 137 }
 138
 139 void print_digit(WINDOW *win, int digit)
 140 {
 141         if (digit < 0) {
 142                 wattron(win, COLOR_PAIR(1));
 143                 wprintw(win, "%d", digit);
 144                 wattroff(win, COLOR_PAIR(1));
 145         } else if (digit > 0) {
 146                 wattron(win, COLOR_PAIR(2));
 147                 wprintw(win, "+%d", digit);
 148                 wattroff(win, COLOR_PAIR(2));
 149         } else {
 150                 wprintw(win, "0");
 151         }
 152 }
 153
 154 void print_digits(WINDOW *win, int first, int second)
 155 {
 156         wprintw(win, "(");
 157         print_digit(win, first);
 158         wprintw(win, ", ");
 159         print_digit(win, second);
 160         wprintw(win, ")");
 161 }
 162
 163 void print_headers(int line, char *desc, int value, int first, int second)
 164 {
 165         wattron(header, A_BOLD);
 166         mvwprintw(header, line, 4, "%s", desc);
 167         wattroff(header, A_BOLD);
 168         mvwprintw(header, line, 16, "%d", value);
 169         wmove(header, line, 24);
 170         print_digits(header, first, second);
 171         wmove(header, line, 40);
 172 }
 173
 174 void set_window_title(WINDOW *win, char *title)
 175 {
 176         wattron(win, A_BOLD);
 177         mvwprintw(win, 0, 1, title);
 178         wattroff(win, A_BOLD);
 179 }
 180
 181 void print_log(char *str)
 182 {
 183         int i;
 184         int current_line = 1;
 185         int current_char = 1;
 186         char *tmp, *tmp2;
 187         /* rotate the line buffer */
 188         if (nb_log_lines >= MAX_LOG_LINES) {
 189                 tmp = strndup(log_lines, MAX_LINE_LENGTH * MAX_LOG_LINES + MAX_LOG_LINES);
 190                 tmp2 = strchr(tmp, '\n');
 191                 memset(log_lines, '\0', strlen(log_lines));
 192                 strncat(log_lines, tmp2 + 1, strlen(tmp2) - 1);
 193                 log_lines[strlen(log_lines)] = '\n';
 194                 log_lines[strlen(log_lines)] = '\0';
 195                 free(tmp);
 196         }
 197         nb_log_lines++;
 198
 199         strncat(log_lines, str, MAX_LINE_LENGTH - 1);
 200
 201         if (nb_log_lines < MAX_LOG_LINES)
 202                 log_lines[strlen(log_lines)] = '\n';
 203         log_lines[strlen(log_lines)] = '\0';
 204
 205         werase(status);
 206         box(status, 0 , 0);
 207         set_window_title(status, "Status");
 208         for (i = 0; i < strlen(log_lines); i++) {
 209                 if (log_lines[i] == '\n') {
 210                         wmove(status, ++current_line, 1);
 211                         current_char = 1;
 212                 } else {
 213                         mvwprintw(status, current_line, current_char++, "%c",
 214                                         log_lines[i]);
 215                 }
 216         }
 217         wrefresh(status);
 218 }
 219
 220 void print_key(WINDOW *win, char *key, char *desc, int toggle)
 221 {
 222         int pair;
 223         if (toggle > 0)
 224                 pair = 4;
 225         else
 226                 pair = 3;
 227         wattron(win, COLOR_PAIR(pair));
 228         wprintw(footer, "%s", key);
 229         wattroff(win, COLOR_PAIR(pair));
 230         wprintw(footer, ":%s", desc);
 231 }
 232
 233 void update_footer()
 234 {
 235         sem_wait(&update_display_sem);
 236         werase(footer);
 237         wmove(footer, 1, 1);
 238         print_key(footer, "F2", "CPUtop  ", current_view == cpu);
 239         print_key(footer, "F3", "PerfTop  ", current_view == perf);
 240         print_key(footer, "F4", "IOTop  ", current_view == iostream);
 241         print_key(footer, "Enter", "Details  ", current_view == process_details);
 242         print_key(footer, "q", "Quit | ", 0);
 243         print_key(footer, "P", "Perf Pref  ", 0);
 244         print_key(footer, "p", "Pause  ", toggle_pause);
 245
 246         wrefresh(footer);
 247         sem_post(&update_display_sem);
 248 }
 249
 250 void basic_header()
 251 {
 252         werase(header);
 253         box(header, 0 , 0);
 254         set_window_title(header, "Statistics for interval [gathering data...[");
 255         wattron(header, A_BOLD);
 256         mvwprintw(header, 1, 4, "CPUs");
 257         mvwprintw(header, 2, 4, "Threads");
 258         mvwprintw(header, 3, 4, "FDs");
 259         wattroff(header, A_BOLD);
 260         wrefresh(header);
 261 }
 262
 263 struct tm format_timestamp(uint64_t timestamp)
 264 {
 265         struct tm tm;
 266         uint64_t ts_sec = 0, ts_nsec;
 267         time_t time_s;
 268
 269         ts_nsec = timestamp;
 270         ts_sec += ts_nsec / NSEC_PER_SEC;
 271         ts_nsec = ts_nsec % NSEC_PER_SEC;
 272
 273         time_s = (time_t) ts_sec;
 274
 275         localtime_r(&time_s, &tm);
 276
 277         return tm;
 278 }
 279
 280 void update_header()
 281 {
 282         struct tm start, end;
 283         uint64_t ts_nsec_start, ts_nsec_end;
 284
 285         ts_nsec_start = data->start % NSEC_PER_SEC;
 286         start = format_timestamp(data->start);
 287
 288         ts_nsec_end = data->end % NSEC_PER_SEC;
 289         end = format_timestamp(data->end);
 290
 291         werase(header);
 292         box(header, 0 , 0);
 293         set_window_title(header, "Statistics for interval ");
 294         wattron(header, A_BOLD);
 295
 296         wprintw(header, "[%02d:%02d:%02d.%09" PRIu64 ", %02d:%02d:%02d.%09" PRIu64 "[",
 297                 start.tm_hour, start.tm_min, start.tm_sec, ts_nsec_start,
 298                 end.tm_hour, end.tm_min, end.tm_sec, ts_nsec_end);
 299         mvwprintw(header, 1, 4, "CPUs");
 300         wattroff(header, A_BOLD);
 301         wprintw(header, "\t%d\t(max/cpu : %0.2f%)", data->cpu_table->len,
 302                         100.0/data->cpu_table->len);
 303         print_headers(2, "Threads", data->nbthreads, data->nbnewthreads,
 304                         -1*(data->nbdeadthreads));
 305         print_headers(3, "FDs", data->nbfiles, data->nbnewfiles,
 306                         -1*(data->nbclosedfiles));
 307         mvwprintw(header, 3, 43, "N/A kbytes/sec");
 308         wrefresh(header);
 309 }
 310
 311 gint sort_by_cpu_desc(gconstpointer p1, gconstpointer p2)
 312 {
 313         struct processtop *n1 = *(struct processtop **)p1;
 314         struct processtop *n2 = *(struct processtop **)p2;
 315         unsigned long totaln1 = n1->totalcpunsec;
 316         unsigned long totaln2 = n2->totalcpunsec;
 317
 318         if (totaln1 < totaln2)
 319                 return 1;
 320         if (totaln1 == totaln2)
 321                 return 0;
 322         return -1;
 323 }
 324
 325 gint sort_by_cpu_group_by_threads_desc(gconstpointer p1, gconstpointer p2)
 326 {
 327         struct processtop *n1 = *(struct processtop **)p1;
 328         struct processtop *n2 = *(struct processtop **)p2;
 329         unsigned long totaln1 = n1->threadstotalcpunsec;
 330         unsigned long totaln2 = n2->threadstotalcpunsec;
 331
 332         if (totaln1 < totaln2)
 333                 return 1;
 334         if (totaln1 == totaln2)
 335                 return 0;
 336         return -1;
 337 }
 338
 339 void update_cputop_display()
 340 {
 341         int i;
 342         int header_offset = 2;
 343         struct processtop *tmp;
 344         unsigned long elapsed;
 345         double maxcputime;
 346         int nblinedisplayed = 0;
 347         int current_line = 0;
 348
 349         elapsed = data->end - data->start;
 350         maxcputime = elapsed * data->cpu_table->len / 100.0;
 351
 352         g_ptr_array_sort(data->process_table, sort_by_cpu_desc);
 353
 354         set_window_title(center, "CPU Top");
 355         wattron(center, A_BOLD);
 356         mvwprintw(center, 1, 1, "CPU(%)");
 357         mvwprintw(center, 1, 12, "TGID");
 358         mvwprintw(center, 1, 22, "PID");
 359         mvwprintw(center, 1, 32, "NAME");
 360         wattroff(center, A_BOLD);
 361
 362         max_center_lines = LINES - 5 - 7 - 1 - header_offset;
 363
 364         /* iterate the process (thread) list */
 365         for (i = list_offset; i < data->process_table->len &&
 366                         nblinedisplayed < max_center_lines; i++) {
 367                 tmp = g_ptr_array_index(data->process_table, i);
 368
 369                 if (current_line == selected_line) {
 370                         selected_process = tmp;
 371                         selected_tid = tmp->tid;
 372                         selected_comm = tmp->comm;
 373                         wattron(center, COLOR_PAIR(5));
 374                         mvwhline(center, current_line + header_offset, 1, ' ', COLS-3);
 375                 }
 376                 /* CPU(%) */
 377                 mvwprintw(center, current_line + header_offset, 1, "%1.2f",
 378                                 tmp->totalcpunsec / maxcputime);
 379                 /* TGID */
 380                 mvwprintw(center, current_line + header_offset, 12, "%d", tmp->pid);
 381                 /* PID */
 382                 mvwprintw(center, current_line + header_offset, 22, "%d", tmp->tid);
 383                 /* NAME */
 384                 mvwprintw(center, current_line + header_offset, 32, "%s", tmp->comm);
 385                 wattroff(center, COLOR_PAIR(5));
 386                 nblinedisplayed++;
 387                 current_line++;
 388         }
 389 }
 390
 391 gint sort_perf(gconstpointer p1, gconstpointer p2, gpointer key)
 392 {
 393         struct processtop *n1 = *(struct processtop **) p1;
 394         struct processtop *n2 = *(struct processtop **) p2;
 395
 396         struct perfcounter *tmp1, *tmp2;
 397         unsigned long totaln2 = 0;
 398         unsigned long totaln1 = 0;
 399
 400         if (!key)
 401                 return 0;
 402
 403         tmp1 = g_hash_table_lookup(n1->perf, key);
 404         if (!tmp1)
 405                 totaln1 = 0;
 406         else
 407                 totaln1 = tmp1->count;
 408
 409         tmp2 = g_hash_table_lookup(n2->perf, key);
 410         if (!tmp2)
 411                 totaln2 = 0;
 412         else
 413                 totaln2 = tmp2->count;
 414
 415         if (totaln1 < totaln2)
 416                 return 1;
 417         if (totaln1 == totaln2) {
 418                 totaln1 = n1->tid;
 419                 totaln2 = n2->tid;
 420                 if (totaln1 < totaln2)
 421                         return 1;
 422                 return -1;
 423         }
 424         return -1;
 425 }
 426
 427 void print_key_title(char *key, int line)
 428 {
 429         wattron(center, A_BOLD);
 430         mvwprintw(center, line, 1, "%s\t", key);
 431         wattroff(center, A_BOLD);
 432 }
 433
 434 void update_process_details()
 435 {
 436         unsigned long elapsed;
 437         double maxcputime;
 438         struct processtop *tmp = find_process_tid(data, selected_tid, selected_comm);
 439         struct files *file_tmp;
 440         int i, j = 0;
 441
 442         set_window_title(center, "Process details");
 443
 444
 445         elapsed = data->end - data->start;
 446         maxcputime = elapsed * data->cpu_table->len / 100.0;
 447
 448         print_key_title("Name", 1);
 449         wprintw(center, "%s", selected_comm);
 450         print_key_title("TID", 2);
 451         wprintw(center, "%d", selected_tid);
 452         if (!tmp) {
 453                 print_key_title("Does not exit at this time", 3);
 454                 return;
 455         }
 456
 457         print_key_title("PID", 3);
 458         wprintw(center, "%d", tmp->pid);
 459         print_key_title("PPID", 4);
 460         wprintw(center, "%d", tmp->ppid);
 461         print_key_title("CPU", 5);
 462         wprintw(center, "%1.2f %%", tmp->totalcpunsec/maxcputime);
 463
 464         print_key_title("READ B/s", 6);
 465         wprintw(center, "%d", tmp->fileread);
 466
 467         print_key_title("WRITE B/s", 7);
 468         wprintw(center, "%d", tmp->filewrite);
 469
 470         wattron(center, A_BOLD);
 471         mvwprintw(center, 8, 1, "FD");
 472         mvwprintw(center, 8, 12, "READ");
 473         mvwprintw(center, 8, 22, "WRITE");
 474         mvwprintw(center, 8, 32, "FILENAME");
 475         wattroff(center, A_BOLD);
 476
 477         for (i = 0; i < tmp->process_files_table->len; i++) {
 478                 file_tmp = get_file(tmp, i);
 479                 if (file_tmp != NULL) {
 480                         mvwprintw(center, 9 + j, 1, "%d", i);
 481                         mvwprintw(center, 9 + j, 12, "%d", file_tmp->read);
 482                         mvwprintw(center, 9 + j, 22, "%d", file_tmp->write);
 483                         mvwprintw(center, 9 + j, 32, "%s", file_tmp->name);
 484                         j++;
 485                 }
 486         }
 487 }
 488
 489 void update_perf()
 490 {
 491         int i;
 492         int nblinedisplayed = 0;
 493         int current_line = 0;
 494         struct processtop *tmp;
 495         int header_offset = 2;
 496         int perf_row = 40;
 497         struct perfcounter *perfn1, *perfn2;
 498         char *perf_key = NULL;
 499         int value;
 500         GHashTableIter iter;
 501         gpointer key;
 502
 503         set_window_title(center, "Perf Top");
 504         wattron(center, A_BOLD);
 505         mvwprintw(center, 1, 1, "PID");
 506         mvwprintw(center, 1, 11, "TID");
 507         mvwprintw(center, 1, 22, "NAME");
 508
 509         perf_row = 40;
 510         g_hash_table_iter_init(&iter, data->perf_list);
 511         while (g_hash_table_iter_next (&iter, &key, (gpointer) &perfn1)) {
 512                 if (perfn1->visible) {
 513                         /* + 5 to strip the "perf_" prefix */
 514                         mvwprintw(center, 1, perf_row, "%s",
 515                                         (char *) key + 5);
 516                         perf_row += 20;
 517                 }
 518                 if (perfn1->sort) {
 519                         perf_key = (char *) key;
 520                 }
 521         }
 522
 523         wattroff(center, A_BOLD);
 524
 525         g_ptr_array_sort_with_data(data->process_table, sort_perf, perf_key);
 526
 527         for (i = 0; i < data->process_table->len &&
 528                         nblinedisplayed < max_center_lines; i++) {
 529                 tmp = g_ptr_array_index(data->process_table, i);
 530
 531                 if (current_line == selected_line) {
 532                         selected_process = tmp;
 533                         wattron(center, COLOR_PAIR(5));
 534                         mvwhline(center, current_line + header_offset, 1, ' ', COLS-3);
 535                 }
 536
 537                 mvwprintw(center, current_line + header_offset, 1, "%d", tmp->pid);
 538                 mvwprintw(center, current_line + header_offset, 11, "%d", tmp->tid);
 539                 mvwprintw(center, current_line + header_offset, 22, "%s", tmp->comm);
 540
 541                 g_hash_table_iter_init(&iter, data->perf_list);
 542
 543                 perf_row = 40;
 544                 while (g_hash_table_iter_next (&iter, &key, (gpointer) &perfn1)) {
 545                         if (perfn1->visible) {
 546                                 perfn2 = g_hash_table_lookup(tmp->perf, (char *) key);
 547                                 if (perfn2)
 548                                         value = perfn2->count;
 549                                 else
 550                                         value = 0;
 551                                 mvwprintw(center, current_line + header_offset,
 552                                                 perf_row, "%d", value);
 553                                 perf_row += 20;
 554                         }
 555                 }
 556
 557                 wattroff(center, COLOR_PAIR(5));
 558                 nblinedisplayed++;
 559                 current_line++;
 560         }
 561 }
 562
 563 gint sort_by_ret_desc(gconstpointer p1, gconstpointer p2)
 564 {
 565         struct processtop *n1 = *(struct processtop **)p1;
 566         struct processtop *n2 = *(struct processtop **)p2;
 567
 568         unsigned long totaln1 = n1->totalfileread + n1->totalfilewrite;
 569         unsigned long totaln2 = n2->totalfileread + n2->totalfilewrite;
 570
 571         if (totaln1 < totaln2)
 572                 return 1;
 573         if (totaln1 == totaln2)
 574                 return 0;
 575         return -1;
 576 }
 577
 578 void update_iostream()
 579 {
 580         int i;
 581         int header_offset = 2;
 582         struct processtop *tmp;
 583         int nblinedisplayed = 0;
 584         int current_line = 0;
 585         int total = 0;
 586
 587         set_window_title(center, "IO Top");
 588         wattron(center, A_BOLD);
 589         mvwprintw(center, 1, 1, "READ (B/s)");
 590         mvwprintw(center, 1, 20, "WRITE (B/s)");
 591
 592         mvwprintw(center, 1, 40, "TOTAL STREAM");
 593
 594         mvwprintw(center, 1, 60, "TGID");
 595         mvwprintw(center, 1, 80, "PID");
 596
 597         mvwprintw(center, 1, 92, "NAME");
 598         wattroff(center, A_BOLD);
 599
 600         g_ptr_array_sort(data->process_table, sort_by_ret_desc);
 601
 602         for (i = list_offset; i < data->process_table->len &&
 603                         nblinedisplayed < max_center_lines; i++) {
 604                 tmp = g_ptr_array_index(data->process_table, i);
 605
 606                 if (current_line == selected_line) {
 607                         selected_process = tmp;
 608                         selected_tid = tmp->tid;
 609                         selected_comm = tmp->comm;
 610                         wattron(center, COLOR_PAIR(5));
 611                         mvwhline(center, current_line + header_offset, 1, ' ', COLS-3);
 612                 }
 613
 614                 /* READ (bytes/sec) */
 615                 mvwprintw(center, current_line + header_offset, 1, "%lu",
 616                         tmp->fileread);
 617
 618                 /* WRITE (bytes/sec) */
 619                 mvwprintw(center, current_line + header_offset, 20, "%lu",
 620                         tmp->filewrite);
 621
 622                 /* TOTAL STREAM */
 623                 total = tmp->totalfileread + tmp->totalfilewrite;
 624
 625                 if (total >= 1000000)
 626                         mvwprintw(center, current_line + header_offset, 40, "%lu MB",
 627                                         total/1000000);
 628                 else if (total >= 1000)
 629                         mvwprintw(center, current_line + header_offset, 40, "%lu KB",
 630                                         total/1000);
 631                 else
 632                         mvwprintw(center, current_line + header_offset, 40, "%lu B",
 633                                         total);
 634
 635                 /* TGID */
 636                 mvwprintw(center, current_line + header_offset, 60, "%d", tmp->pid);
 637                 /* PID */
 638                 mvwprintw(center, current_line + header_offset, 80, "%d", tmp->tid);
 639                 /* NAME */
 640                 mvwprintw(center, current_line + header_offset, 92, "%s", tmp->comm);
 641                 wattroff(center, COLOR_PAIR(5));
 642                 nblinedisplayed++;
 643                 current_line++;
 644         }
 645 }
 646
 647 void update_current_view()
 648 {
 649         sem_wait(&update_display_sem);
 650         if (!data)
 651                 return;
 652         update_header();
 653
 654         werase(center);
 655         box(center, 0, 0);
 656         switch (current_view) {
 657         case cpu:
 658                 update_cputop_display();
 659                 break;
 660         case perf:
 661                 update_perf();
 662                 break;
 663         case process_details:
 664                 update_process_details();
 665                 break;
 666         case iostream:
 667                 update_iostream();
 668                 break;
 669         case tree:
 670                 update_cputop_display();
 671                 break;
 672         default:
 673                 break;
 674         }
 675         update_panels();
 676         doupdate();
 677         sem_post(&update_display_sem);
 678 }
 679
 680 void setup_perf_panel()
 681 {
 682         int size;
 683         if (!data)
 684                 return;
 685         if (perf_panel_window) {
 686                 del_panel(perf_panel);
 687                 delwin(perf_panel_window);
 688         }
 689         size = g_hash_table_size(data->perf_list);
 690         perf_panel_window = create_window(size + 2, 30, 10, 10);
 691         perf_panel = new_panel(perf_panel_window);
 692         perf_panel_visible = 0;
 693         hide_panel(perf_panel);
 694 }
 695
 696 void update_perf_panel(int line_selected, int toggle_view, int toggle_sort)
 697 {
 698         int i;
 699         struct perfcounter *perf;
 700         GList *perflist;
 701
 702         if (!data)
 703                 return;
 704
 705         werase(perf_panel_window);
 706         box(perf_panel_window, 0 , 0);
 707         set_window_title(perf_panel_window, "Perf Preferences ");
 708         wattron(perf_panel_window, A_BOLD);
 709         mvwprintw(perf_panel_window, g_hash_table_size(data->perf_list) + 1, 1,
 710                         " 's' to sort");
 711         wattroff(perf_panel_window, A_BOLD);
 712
 713         if (toggle_sort == 1) {
 714                 i = 0;
 715                 perflist = g_list_first(g_hash_table_get_keys(data->perf_list));
 716                 while (perflist) {
 717                         perf = g_hash_table_lookup(data->perf_list, perflist->data);
 718                         if (i != line_selected)
 719                                 perf->sort = 0;
 720                         else
 721                                 perf->sort = 1;
 722                         i++;
 723                         perflist = g_list_next(perflist);
 724                 }
 725                 update_current_view();
 726         }
 727
 728         i = 0;
 729         perflist = g_list_first(g_hash_table_get_keys(data->perf_list));
 730         while (perflist) {
 731                 perf = g_hash_table_lookup(data->perf_list, perflist->data);
 732                 if (i == line_selected && toggle_view == 1) {
 733                         perf->visible = perf->visible == 1 ? 0:1;
 734                         update_current_view();
 735                 }
 736                 if (i == line_selected) {
 737                         wattron(perf_panel_window, COLOR_PAIR(5));
 738                         mvwhline(perf_panel_window, i + 1, 1, ' ', 30 - 2);
 739                 }
 740                 if (perf->sort == 1)
 741                         wattron(perf_panel_window, A_BOLD);
 742                 mvwprintw(perf_panel_window, i + 1, 1, "[%c] %s",
 743                                 perf->visible == 1 ? 'x' : ' ',
 744                                 (char *) perflist->data + 5);
 745                 wattroff(perf_panel_window, A_BOLD);
 746                 wattroff(perf_panel_window, COLOR_PAIR(5));
 747                 i++;
 748                 perflist = g_list_next(perflist);
 749         }
 750         update_panels();
 751         doupdate();
 752 }
 753
 754
 755 void toggle_perf_panel(void)
 756 {
 757         if (perf_panel_visible) {
 758                 hide_panel(perf_panel);
 759                 perf_panel_visible = 0;
 760         } else {
 761                 setup_perf_panel();
 762                 update_perf_panel(perf_line_selected, 0, 0);
 763                 show_panel(perf_panel);
 764                 perf_panel_visible = 1;
 765         }
 766         update_panels();
 767         doupdate();
 768 }
 769
 770 void display(unsigned int index)
 771 {
 772         last_display_index = index;
 773         currently_displayed_index = index;
 774         data = g_ptr_array_index(copies, index);
 775         if (!data)
 776                 return;
 777         max_elements = data->process_table->len;
 778         update_current_view();
 779         update_footer();
 780         update_panels();
 781         doupdate();
 782 }
 783
 784 void pause_display()
 785 {
 786         toggle_pause = 1;
 787         print_log("Pause");
 788         sem_wait(&pause_sem);
 789 }
 790
 791 void resume_display()
 792 {
 793         toggle_pause = -1;
 794         print_log("Resume");
 795         sem_post(&pause_sem);
 796 }
 797
 798 void *handle_keyboard(void *p)
 799 {
 800         int ch;
 801         while((ch = getch())) {
 802                 switch(ch) {
 803                 /* Move the cursor and scroll */
 804                 case KEY_DOWN:
 805                         if (perf_panel_visible) {
 806                                 if (perf_line_selected < g_hash_table_size(data->perf_list) - 1)
 807                                         perf_line_selected++;
 808                                 update_perf_panel(perf_line_selected, 0, 0);
 809                         } else {
 810                                 if (selected_line < (max_center_lines - 1) &&
 811                                                 selected_line < max_elements - 1) {
 812                                         selected_line++;
 813                                         selected_in_list++;
 814                                 } else if (selected_in_list < (max_elements - 1)
 815                                                 && (list_offset < (max_elements - max_center_lines))) {
 816                                         selected_in_list++;
 817                                         list_offset++;
 818                                 }
 819                                 update_current_view();
 820                         }
 821                         break;
 822                 case KEY_NPAGE:
 823                         if ((selected_line + 10 < max_center_lines - 1) &&
 824                                         ((selected_line + 10) < max_elements - 1)) {
 825                                 selected_line += 10;
 826                                 selected_in_list += 10;
 827                         } else if (max_elements > max_center_lines) {
 828                                 selected_line = max_center_lines - 1;
 829                                 if (selected_in_list + 10 < max_elements - 1) {
 830                                         selected_in_list += 10;
 831                                         list_offset += (selected_in_list - max_center_lines + 1);
 832                                 }
 833                         } else if (selected_line + 10 > max_elements) {
 834                                 selected_line = max_elements - 1;
 835                         }
 836                         update_current_view();
 837                         break;
 838                 case KEY_UP:
 839                         if (perf_panel_visible) {
 840                                 if (perf_line_selected > 0)
 841                                         perf_line_selected--;
 842                                 update_perf_panel(perf_line_selected, 0, 0);
 843                         } else {
 844                                 if (selected_line > 0) {
 845                                         selected_line--;
 846                                         selected_in_list--;
 847                                 } else if (selected_in_list > 0 && list_offset > 0) {
 848                                         selected_in_list--;
 849                                         list_offset--;
 850                                 }
 851                                 update_current_view();
 852                         }
 853                         break;
 854                 case KEY_PPAGE:
 855                         if (selected_line - 10 > 0)
 856                                 selected_line -= 10;
 857                         else
 858                                 selected_line = 0;
 859                         update_current_view();
 860                         break;
 861
 862                 /* Navigate the history with arrows */
 863                 case KEY_LEFT:
 864                         if (currently_displayed_index > 0) {
 865                                 currently_displayed_index--;
 866                                 print_log("Going back in time");
 867                         } else {
 868                                 print_log("Cannot rewind, last data is already displayed");
 869                         }
 870                         data = g_ptr_array_index(copies, currently_displayed_index);
 871                         max_elements = data->process_table->len;
 872
 873                         /* we force to pause the display when moving in time */
 874                         if (toggle_pause < 0)
 875                                 pause_display();
 876
 877                         update_current_view();
 878                         update_footer();
 879                         break;
 880                 case KEY_RIGHT:
 881                         if (currently_displayed_index < last_display_index) {
 882                                 currently_displayed_index++;
 883                                 print_log("Going forward in time");
 884                                 data = g_ptr_array_index(copies, currently_displayed_index);
 885                                 max_elements = data->process_table->len;
 886                                 update_current_view();
 887                                 update_footer();
 888                         } else {
 889                                 print_log("Manually moving forward");
 890                                 sem_post(&timer);
 891                                 /* we force to resume the refresh when moving forward */
 892                                 if (toggle_pause > 0)
 893                                         resume_display();
 894                         }
 895
 896                         break;
 897                 case ' ':
 898                         if (perf_panel_visible)
 899                                 update_perf_panel(perf_line_selected, 1, 0);
 900                         break;
 901                 case 's':
 902                         if (perf_panel_visible)
 903                                 update_perf_panel(perf_line_selected, 0, 1);
 904                         break;
 905
 906                 case 13: /* FIXME : KEY_ENTER ?? */
 907                         if (current_view == cpu) {
 908                                 current_view = process_details;
 909                         }
 910                         update_current_view();
 911                         break;
 912
 913                 case KEY_F(1):
 914                         toggle_tree *= -1;
 915                         current_view = cpu;
 916                         update_current_view();
 917                         break;
 918                 case KEY_F(2):
 919                         current_view = cpu;
 920                         update_current_view();
 921                         break;
 922                 case KEY_F(3):
 923                         current_view = perf;
 924                         toggle_tree = -1;
 925                         update_current_view();
 926                         break;
 927                 case KEY_F(4):
 928                         current_view = iostream;
 929                         toggle_tree = -1;
 930                         update_current_view();
 931                         break;
 932                 case KEY_F(10):
 933                 case 'q':
 934                         reset_ncurses();
 935                         break;
 936                 case 't':
 937                         toggle_threads *= -1;
 938                         update_current_view();
 939                         break;
 940                 case 'p':
 941                         if (toggle_pause < 0) {
 942                                 pause_display();
 943                         } else {
 944                                 resume_display();
 945                         }
 946                         break;
 947                 case 'P':
 948                         toggle_perf_panel();
 949                         break;
 950                 default:
 951                         if (data)
 952                                 update_current_view();
 953                         break;
 954                 }
 955                 update_footer();
 956         }
 957         return NULL;
 958 }
 959
 960 void init_ncurses()
 961 {
 962         sem_init(&update_display_sem, 0, 1);
 963         init_screen();
 964
 965         header = create_window(5, COLS - 1, 0, 0);
 966         center = create_window(LINES - 5 - 7, COLS - 1, 5, 0);
 967         status = create_window(MAX_LOG_LINES + 2, COLS - 1, LINES - 7, 0);
 968         footer = create_window(1, COLS - 1, LINES - 1, 0);
 969
 970         print_log("Starting display");
 971
 972         main_panel = new_panel(center);
 973         setup_perf_panel();
 974
 975         current_view = cpu;
 976
 977         basic_header();
 978         update_footer();
 979
 980         pthread_create(&keyboard_thread, NULL, handle_keyboard, (void *)NULL);
 981 }
 982