granicus.if.org Git - sysstat/blob - mpstat.c

   1 /*
   2  * mpstat: per-processor statistics
   3  * (C) 2000-2013 by Sebastien GODARD (sysstat <at> orange.fr)
   4  *
   5  ***************************************************************************
   6  * This program is free software; you can redistribute it and/or modify it *
   7  * under the terms of the GNU General Public License as published  by  the *
   8  * Free Software Foundation; either version 2 of the License, or (at  your *
   9  * option) any later version.                                              *
  10  *                                                                         *
  11  * This program is distributed in the hope that it  will  be  useful,  but *
  12  * WITHOUT ANY WARRANTY; without the implied warranty  of  MERCHANTABILITY *
  13  * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License *
  14  * for more details.                                                       *
  15  *                                                                         *
  16  * You should have received a copy of the GNU General Public License along *
  17  * with this program; if not, write to the Free Software Foundation, Inc., *
  18  * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA                   *
  19  ***************************************************************************
  20  */
  21
  22 #include <stdio.h>
  23 #include <string.h>
  24 #include <stdlib.h>
  25 #include <unistd.h>
  26 #include <signal.h>
  27 #include <errno.h>
  28 #include <ctype.h>
  29 #include <sys/utsname.h>
  30
  31 #include "version.h"
  32 #include "mpstat.h"
  33 #include "common.h"
  34 #include "rd_stats.h"
  35 #include "count.h"
  36
  37 #ifdef USE_NLS
  38 #include <locale.h>
  39 #include <libintl.h>
  40 #define _(string) gettext(string)
  41 #else
  42 #define _(string) (string)
  43 #endif
  44
  45 #define SCCSID "@(#)sysstat-" VERSION ": "  __FILE__ " compiled " __DATE__ " " __TIME__
  46 char *sccsid(void) { return (SCCSID); }
  47
  48 unsigned long long uptime[3] = {0, 0, 0};
  49 unsigned long long uptime0[3] = {0, 0, 0};
  50
  51 /* NOTE: Use array of _char_ for bitmaps to avoid endianness problems...*/
  52 unsigned char *cpu_bitmap;      /* Bit 0: Global; Bit 1: 1st proc; etc. */
  53
  54 /* Structures used to store stats */
  55 struct stats_cpu *st_cpu[3];
  56 struct stats_irq *st_irq[3];
  57 struct stats_irqcpu *st_irqcpu[3];
  58 struct stats_irqcpu *st_softirqcpu[3];
  59
  60 struct tm mp_tstamp[3];
  61
  62 /* Activity flag */
  63 unsigned int actflags = 0;
  64
  65 unsigned int flags = 0;
  66
  67 /* Interval and count parameters */
  68 long interval = -1, count = 0;
  69
  70 /* Nb of processors on the machine */
  71 int cpu_nr = 0;
  72 /* Nb of interrupts per processor */
  73 int irqcpu_nr = 0;
  74 /* Nb of soft interrupts per processor */
  75 int softirqcpu_nr = 0;
  76
  77 struct sigaction alrm_act, int_act;
  78 int sigint_caught = 0;
  79
  80 /*
  81  ***************************************************************************
  82  * Print usage and exit
  83  *
  84  * IN:
  85  * @progname    Name of sysstat command
  86  ***************************************************************************
  87  */
  88 void usage(char *progname)
  89 {
  90         fprintf(stderr, _("Usage: %s [ options ] [ <interval> [ <count> ] ]\n"),
  91                 progname);
  92
  93         fprintf(stderr, _("Options are:\n"
  94                           "[ -A ] [ -u ] [ -V ] [ -I { SUM | CPU | SCPU | ALL } ]\n"
  95                           "[ -P { <cpu> [,...] | ON | ALL } ]\n"));
  96         exit(1);
  97 }
  98
  99 /*
 100  ***************************************************************************
 101  * SIGALRM signal handler. No need to reset the handler here.
 102  *
 103  * IN:
 104  * @sig Signal number.
 105  ***************************************************************************
 106  */
 107 void alarm_handler(int sig)
 108 {
 109         alarm(interval);
 110 }
 111
 112 /*
 113  ***************************************************************************
 114  * SIGINT signal handler.
 115  *
 116  * IN:
 117  * @sig Signal number.
 118  **************************************************************************
 119  */
 120 void int_handler(int sig)
 121 {
 122         sigint_caught = 1;
 123 }
 124
 125 /*
 126  ***************************************************************************
 127  * Allocate stats structures and cpu bitmap.
 128  *
 129  * IN:
 130  * @nr_cpus     Number of CPUs. This is the real number of available CPUs + 1
 131  *              because we also have to allocate a structure for CPU 'all'.
 132  ***************************************************************************
 133  */
 134 void salloc_mp_struct(int nr_cpus)
 135 {
 136         int i;
 137
 138         for (i = 0; i < 3; i++) {
 139
 140                 if ((st_cpu[i] = (struct stats_cpu *) malloc(STATS_CPU_SIZE * nr_cpus))
 141                     == NULL) {
 142                         perror("malloc");
 143                         exit(4);
 144                 }
 145                 memset(st_cpu[i], 0, STATS_CPU_SIZE * nr_cpus);
 146
 147                 if ((st_irq[i] = (struct stats_irq *) malloc(STATS_IRQ_SIZE * nr_cpus))
 148                     == NULL) {
 149                         perror("malloc");
 150                         exit(4);
 151                 }
 152                 memset(st_irq[i], 0, STATS_IRQ_SIZE * nr_cpus);
 153
 154                 if ((st_irqcpu[i] = (struct stats_irqcpu *) malloc(STATS_IRQCPU_SIZE * nr_cpus * irqcpu_nr))
 155                     == NULL) {
 156                         perror("malloc");
 157                         exit(4);
 158                 }
 159                 memset(st_irqcpu[i], 0, STATS_IRQCPU_SIZE * nr_cpus * irqcpu_nr);
 160
 161                 if ((st_softirqcpu[i] = (struct stats_irqcpu *) malloc(STATS_IRQCPU_SIZE * nr_cpus * softirqcpu_nr))
 162                      == NULL) {
 163                         perror("malloc");
 164                         exit(4);
 165                 }
 166                 memset(st_softirqcpu[i], 0, STATS_IRQCPU_SIZE * nr_cpus * softirqcpu_nr);
 167         }
 168
 169         if ((cpu_bitmap = (unsigned char *) malloc((nr_cpus >> 3) + 1)) == NULL) {
 170                 perror("malloc");
 171                 exit(4);
 172         }
 173         memset(cpu_bitmap, 0, (nr_cpus >> 3) + 1);
 174 }
 175
 176 /*
 177  ***************************************************************************
 178  * Free structures and bitmap.
 179  ***************************************************************************
 180  */
 181 void sfree_mp_struct(void)
 182 {
 183         int i;
 184
 185         for (i = 0; i < 3; i++) {
 186                 free(st_cpu[i]);
 187                 free(st_irq[i]);
 188                 free(st_irqcpu[i]);
 189                 free(st_softirqcpu[i]);
 190         }
 191
 192         free(cpu_bitmap);
 193 }
 194
 195 /*
 196  ***************************************************************************
 197  * Display per CPU statistics.
 198  *
 199  * IN:
 200  * @st_ic       Array for per-CPU statistics.
 201  * @ic_nr       Number of interrupts (hard or soft) per CPU.
 202  * @dis         TRUE if a header line must be printed.
 203  * @itv         Interval value.
 204  * @prev        Position in array where statistics used as reference are.
 205  *              Stats used as reference may be the previous ones read, or
 206  *              the very first ones when calculating the average.
 207  * @curr        Position in array where current statistics will be saved.
 208  * @prev_string String displayed at the beginning of a header line. This is
 209  *              the timestamp of the previous sample, or "Average" when
 210  *              displaying average stats.
 211  * @curr_string String displayed at the beginning of current sample stats.
 212  *              This is the timestamp of the current sample, or "Average"
 213  *              when displaying average stats.
 214  ***************************************************************************
 215  */
 216 void write_irqcpu_stats(struct stats_irqcpu *st_ic[], int ic_nr, int dis,
 217                         unsigned long long itv, int prev, int curr,
 218                         char *prev_string, char *curr_string)
 219 {
 220         struct stats_cpu *scc;
 221         int j = 0, offset, cpu;
 222         struct stats_irqcpu *p, *q, *p0, *q0;
 223
 224         /*
 225         * Check if number of interrupts has changed.
 226         * NB: A null interval value indicates that we are
 227          * displaying statistics since system startup.
 228          */
 229         if (!dis && interval) {
 230                 do {
 231                         p0 = st_ic[curr] + j;
 232                         if (p0->irq_name[0] != '\0') {
 233                                 q0 = st_ic[prev] + j;
 234                                 if (strcmp(p0->irq_name, q0->irq_name)) {
 235                                         /* These are two different irq */
 236                                         j = -2;
 237                                 }
 238                         }
 239                         j++;
 240                 }
 241                 while ((j > 0) && (j <= ic_nr));
 242         }
 243
 244         if (dis || (j < 0)) {
 245                 /* Print header */
 246                 printf("\n%-11s  CPU", prev_string);
 247                 for (j = 0; j < ic_nr; j++) {
 248                         p0 = st_ic[curr] + j;
 249                         if (p0->irq_name[0] != '\0') {  /* Nb of irq per proc may have varied... */
 250                                 printf(" %8s/s", p0->irq_name);
 251                         }
 252                 }
 253                 printf("\n");
 254         }
 255
 256         for (cpu = 1; cpu <= cpu_nr; cpu++) {
 257
 258                 scc = st_cpu[curr] + cpu;
 259
 260                 /* Check CPU presence */
 261                 if (!scc->present)
 262                     continue;
 263                 /*
 264                  * Check if we want stats about this CPU.
 265                  * CPU must have been explicitly selected using option -P,
 266                  * else we display every CPU.
 267                  */
 268                 if (!(*(cpu_bitmap + (cpu >> 3)) & (1 << (cpu & 0x07))) && USE_P_OPTION(flags))
 269                         continue;
 270
 271                 if ((scc->cpu_user    + scc->cpu_nice + scc->cpu_sys   +
 272                      scc->cpu_iowait  + scc->cpu_idle + scc->cpu_steal +
 273                      scc->cpu_hardirq + scc->cpu_softirq) == 0) {
 274
 275                         /* Offline CPU found */
 276
 277                         if (DISPLAY_ONLINE_CPU(flags))
 278                                 continue;
 279                 }
 280
 281                 printf("%-11s  %3d", curr_string, cpu - 1);
 282
 283                 for (j = 0; j < ic_nr; j++) {
 284                         p0 = st_ic[curr] + j;   /* irq field set only for proc #0 */
 285                         /*
 286                          * An empty string for irq name means it is a remaining interrupt
 287                          * which is no longer used, for example because the
 288                          * number of interrupts has decreased in /proc/interrupts.
 289                          */
 290                         if (p0->irq_name[0] != '\0') {
 291                                 q0 = st_ic[prev] + j;
 292                                 offset = j;
 293
 294                                 /*
 295                                  * If we want stats for the time since system startup,
 296                                  * we have p0->irq != q0->irq, since q0 structure is
 297                                  * completely set to zero.
 298                                  */
 299                                 if (strcmp(p0->irq_name, q0->irq_name) && interval) {
 300                                         if (j)
 301                                                 offset = j - 1;
 302                                         q0 = st_ic[prev] + offset;
 303                                         if (strcmp(p0->irq_name, q0->irq_name) && (j + 1 < ic_nr))
 304                                                 offset = j + 1;
 305                                         q0 = st_ic[prev] + offset;
 306                                 }
 307
 308                                 if (!strcmp(p0->irq_name, q0->irq_name) || !interval) {
 309                                         p = st_ic[curr] + (cpu - 1) * ic_nr + j;
 310                                         q = st_ic[prev] + (cpu - 1) * ic_nr + offset;
 311                                         printf(" %10.2f",
 312                                                S_VALUE(q->interrupt, p->interrupt, itv));
 313                                 }
 314                                 else
 315                                         printf("        N/A");
 316                         }
 317                 }
 318                 printf("\n");
 319         }
 320 }
 321
 322 /*
 323  ***************************************************************************
 324  * Core function used to display statistics.
 325  *
 326  * IN:
 327  * @prev        Position in array where statistics used as reference are.
 328  *              Stats used as reference may be the previous ones read, or
 329  *              the very first ones when calculating the average.
 330  * @curr        Position in array where statistics for current sample are.
 331  * @dis         TRUE if a header line must be printed.
 332  * @prev_string String displayed at the beginning of a header line. This is
 333  *              the timestamp of the previous sample, or "Average" when
 334  *              displaying average stats.
 335  * @curr_string String displayed at the beginning of current sample stats.
 336  *              This is the timestamp of the current sample, or "Average"
 337  *              when displaying average stats.
 338  ***************************************************************************
 339  */
 340 void write_stats_core(int prev, int curr, int dis,
 341                       char *prev_string, char *curr_string)
 342 {
 343         struct stats_cpu *scc, *scp;
 344         unsigned long long itv, pc_itv, g_itv;
 345         int cpu;
 346
 347         /* Test stdout */
 348         TEST_STDOUT(STDOUT_FILENO);
 349
 350         /* Compute time interval */
 351         g_itv = get_interval(uptime[prev], uptime[curr]);
 352
 353         /* Reduce interval value to one processor */
 354         if (cpu_nr > 1) {
 355                 itv = get_interval(uptime0[prev], uptime0[curr]);
 356         }
 357         else {
 358                 itv = g_itv;
 359         }
 360
 361         /* Print CPU stats */
 362         if (DISPLAY_CPU(actflags)) {
 363                 if (dis) {
 364                         printf("\n%-11s  CPU    %%usr   %%nice    %%sys %%iowait    %%irq   "
 365                                "%%soft  %%steal  %%guest  %%gnice   %%idle\n",
 366                                prev_string);
 367                 }
 368
 369                 /* Check if we want global stats among all proc */
 370                 if (*cpu_bitmap & 1) {
 371
 372                         printf("%-11s  all", curr_string);
 373
 374                         printf("  %6.2f  %6.2f  %6.2f  %6.2f  %6.2f  %6.2f  %6.2f  %6.2f  %6.2f  %6.2f\n",
 375                                (st_cpu[curr]->cpu_user - st_cpu[curr]->cpu_guest) <
 376                                (st_cpu[prev]->cpu_user - st_cpu[prev]->cpu_guest) ?
 377                                0.0 :
 378                                ll_sp_value(st_cpu[prev]->cpu_user - st_cpu[prev]->cpu_guest,
 379                                            st_cpu[curr]->cpu_user - st_cpu[curr]->cpu_guest,
 380                                            g_itv),
 381                                (st_cpu[curr]->cpu_nice - st_cpu[curr]->cpu_guest_nice) <
 382                                (st_cpu[prev]->cpu_nice - st_cpu[prev]->cpu_guest_nice) ?
 383                                0.0 :
 384                                ll_sp_value(st_cpu[prev]->cpu_nice - st_cpu[prev]->cpu_guest_nice,
 385                                            st_cpu[curr]->cpu_nice - st_cpu[curr]->cpu_guest_nice,
 386                                            g_itv),
 387                                ll_sp_value(st_cpu[prev]->cpu_sys,
 388                                            st_cpu[curr]->cpu_sys,
 389                                            g_itv),
 390                                ll_sp_value(st_cpu[prev]->cpu_iowait,
 391                                            st_cpu[curr]->cpu_iowait,
 392                                            g_itv),
 393                                ll_sp_value(st_cpu[prev]->cpu_hardirq,
 394                                            st_cpu[curr]->cpu_hardirq,
 395                                            g_itv),
 396                                ll_sp_value(st_cpu[prev]->cpu_softirq,
 397                                            st_cpu[curr]->cpu_softirq,
 398                                            g_itv),
 399                                ll_sp_value(st_cpu[prev]->cpu_steal,
 400                                            st_cpu[curr]->cpu_steal,
 401                                            g_itv),
 402                                ll_sp_value(st_cpu[prev]->cpu_guest,
 403                                            st_cpu[curr]->cpu_guest,
 404                                            g_itv),
 405                                ll_sp_value(st_cpu[prev]->cpu_guest_nice,
 406                                            st_cpu[curr]->cpu_guest_nice,
 407                                            g_itv),
 408                                (st_cpu[curr]->cpu_idle < st_cpu[prev]->cpu_idle) ?
 409                                0.0 :
 410                                ll_sp_value(st_cpu[prev]->cpu_idle,
 411                                            st_cpu[curr]->cpu_idle,
 412                                            g_itv));
 413                 }
 414
 415                 for (cpu = 1; cpu <= cpu_nr; cpu++) {
 416
 417                         scc = st_cpu[curr] + cpu;
 418                         scp = st_cpu[prev] + cpu;
 419
 420                         /* Check CPU presence */
 421                         if (!scc->present)
 422                                 continue;
 423                         /* Check if we want stats about this proc */
 424                         if (!(*(cpu_bitmap + (cpu >> 3)) & (1 << (cpu & 0x07))))
 425                                 continue;
 426
 427                         /*
 428                          * If the CPU is offline then it is omited from /proc/stat
 429                          * and the sum of all values is zero.
 430                          * (Remember that guest/guest_nice times are already included in
 431                          * user/nice modes.)
 432                          */
 433                         if ((scc->cpu_user    + scc->cpu_nice + scc->cpu_sys   +
 434                              scc->cpu_iowait  + scc->cpu_idle + scc->cpu_steal +
 435                              scc->cpu_hardirq + scc->cpu_softirq) == 0) {
 436
 437                                 if (!DISPLAY_ONLINE_CPU(flags)) {
 438                                         printf("%-11s %4d"
 439                                                "  %6.2f  %6.2f  %6.2f  %6.2f  %6.2f  %6.2f"
 440                                                "  %6.2f  %6.2f  %6.2f  %6.2f\n",
 441                                                curr_string, cpu - 1,
 442                                                0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0);
 443                                 }
 444                                 continue;
 445                         }
 446
 447                         printf("%-11s %4d", curr_string, cpu - 1);
 448
 449                         /* Recalculate itv for current proc */
 450                         pc_itv = get_per_cpu_interval(scc, scp);
 451
 452                         if (!pc_itv) {
 453                                 /*
 454                                  * If the CPU is tickless then there is no change in CPU values
 455                                  * but the sum of values is not zero.
 456                                  */
 457                                 printf("  %6.2f  %6.2f  %6.2f  %6.2f  %6.2f  %6.2f"
 458                                        "  %6.2f  %6.2f  %6.2f  %6.2f\n",
 459                                        0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 100.0);
 460                         }
 461
 462                         else {
 463                                 printf("  %6.2f  %6.2f  %6.2f  %6.2f  %6.2f  %6.2f"
 464                                        "  %6.2f  %6.2f  %6.2f  %6.2f\n",
 465                                        (scc->cpu_user - scc->cpu_guest) < (scp->cpu_user - scp->cpu_guest) ?
 466                                        0.0 :
 467                                        ll_sp_value(scp->cpu_user - scp->cpu_guest,
 468                                                    scc->cpu_user - scc->cpu_guest,
 469                                                    pc_itv),
 470                                        (scc->cpu_nice - scc->cpu_guest_nice) < (scp->cpu_nice - scp->cpu_guest_nice) ?
 471                                        0.0 :
 472                                        ll_sp_value(scp->cpu_nice - scp->cpu_guest_nice,
 473                                                    scc->cpu_nice - scc->cpu_guest_nice,
 474                                                    pc_itv),
 475                                        ll_sp_value(scp->cpu_sys,
 476                                                    scc->cpu_sys,
 477                                                    pc_itv),
 478                                        ll_sp_value(scp->cpu_iowait,
 479                                                    scc->cpu_iowait,
 480                                                    pc_itv),
 481                                        ll_sp_value(scp->cpu_hardirq,
 482                                                    scc->cpu_hardirq,
 483                                                    pc_itv),
 484                                        ll_sp_value(scp->cpu_softirq,
 485                                                    scc->cpu_softirq,
 486                                                    pc_itv),
 487                                        ll_sp_value(scp->cpu_steal,
 488                                                    scc->cpu_steal,
 489                                                    pc_itv),
 490                                        ll_sp_value(scp->cpu_guest,
 491                                                    scc->cpu_guest,
 492                                                    pc_itv),
 493                                        ll_sp_value(scp->cpu_guest_nice,
 494                                                    scc->cpu_guest_nice,
 495                                                    pc_itv),
 496                                        (scc->cpu_idle < scp->cpu_idle) ?
 497                                        0.0 :
 498                                        ll_sp_value(scp->cpu_idle,
 499                                                    scc->cpu_idle,
 500                                                    pc_itv));
 501                         }
 502                 }
 503         }
 504
 505         /* Print total number of interrupts per processor */
 506         if (DISPLAY_IRQ_SUM(actflags)) {
 507                 struct stats_irq *sic, *sip;
 508
 509                 if (dis) {
 510                         printf("\n%-11s  CPU    intr/s\n", prev_string);
 511                 }
 512
 513                 if (*cpu_bitmap & 1) {
 514                         printf("%-11s  all %9.2f\n", curr_string,
 515                                ll_s_value(st_irq[prev]->irq_nr, st_irq[curr]->irq_nr, itv));
 516                 }
 517
 518                 for (cpu = 1; cpu <= cpu_nr; cpu++) {
 519
 520                         sic = st_irq[curr] + cpu;
 521                         sip = st_irq[prev] + cpu;
 522
 523                         scc = st_cpu[curr] + cpu;
 524                         scp = st_cpu[prev] + cpu;
 525
 526                         /* Check CPU presence */
 527                         if (!scc->present)
 528                                 continue;
 529                         /* Check if we want stats about this proc */
 530                         if (!(*(cpu_bitmap + (cpu >> 3)) & (1 << (cpu & 0x07))))
 531                                 continue;
 532
 533                         if ((scc->cpu_user    + scc->cpu_nice + scc->cpu_sys   +
 534                              scc->cpu_iowait  + scc->cpu_idle + scc->cpu_steal +
 535                              scc->cpu_hardirq + scc->cpu_softirq) == 0) {
 536
 537                                 /* This is an offline CPU */
 538
 539                                 if (!DISPLAY_ONLINE_CPU(flags)) {
 540                                         printf("%-11s %4d"
 541                                                "  %9.2f\n",
 542                                                curr_string, cpu - 1,
 543                                                0.0);
 544                                 }
 545                                 continue;
 546                         }
 547
 548                         printf("%-11s %4d", curr_string, cpu - 1);
 549
 550                         /* Recalculate itv for current proc */
 551                         pc_itv = get_per_cpu_interval(scc, scp);
 552
 553                         if (!pc_itv) {
 554                                 /* This is a tickless CPU */
 555                                 printf(" %9.2f\n", 0.0);
 556                         }
 557                         else {
 558                                 printf(" %9.2f\n",
 559                                        ll_s_value(sip->irq_nr, sic->irq_nr, itv));
 560                         }
 561                 }
 562         }
 563
 564         if (DISPLAY_IRQ_CPU(actflags)) {
 565                 write_irqcpu_stats(st_irqcpu, irqcpu_nr, dis, itv, prev, curr,
 566                                    prev_string, curr_string);
 567         }
 568
 569         if (DISPLAY_SOFTIRQS(actflags)) {
 570                 write_irqcpu_stats(st_softirqcpu, softirqcpu_nr, dis, itv, prev, curr,
 571                                    prev_string, curr_string);
 572         }
 573
 574         /* Fix CPU counter values for every offline CPU */
 575         for (cpu = 1; cpu <= cpu_nr; cpu++) {
 576
 577                 scc = st_cpu[curr] + cpu;
 578                 scp = st_cpu[prev] + cpu;
 579
 580                 if ((scc->cpu_user    + scc->cpu_nice + scc->cpu_sys   +
 581                      scc->cpu_iowait  + scc->cpu_idle + scc->cpu_steal +
 582                      scc->cpu_hardirq + scc->cpu_softirq) == 0) {
 583                         /*
 584                          * Offline CPU found.
 585                          * Set current struct fields (which have been set to zero)
 586                          * to values from previous iteration. Hence their values won't
 587                          * jump from zero when the CPU comes back online.
 588                          */
 589                         *scc = *scp;
 590                 }
 591         }
 592 }
 593
 594 /*
 595  ***************************************************************************
 596  * Print statistics average.
 597  *
 598  * IN:
 599  * @curr        Position in array where statistics for current sample are.
 600  * @dis         TRUE if a header line must be printed.
 601  ***************************************************************************
 602  */
 603 void write_stats_avg(int curr, int dis)
 604 {
 605         char string[16];
 606
 607         strncpy(string, _("Average:"), 16);
 608         string[15] = '\0';
 609         write_stats_core(2, curr, dis, string, string);
 610 }
 611
 612 /*
 613  ***************************************************************************
 614  * Print statistics.
 615  *
 616  * IN:
 617  * @curr        Position in array where statistics for current sample are.
 618  * @dis         TRUE if a header line must be printed.
 619  ***************************************************************************
 620  */
 621 void write_stats(int curr, int dis)
 622 {
 623         char cur_time[2][16];
 624
 625         /* Get previous timestamp */
 626         strftime(cur_time[!curr], 16, "%X", &(mp_tstamp[!curr]));
 627
 628         /* Get current timestamp */
 629         strftime(cur_time[curr], 16, "%X", &(mp_tstamp[curr]));
 630
 631         write_stats_core(!curr, curr, dis, cur_time[!curr], cur_time[curr]);
 632 }
 633
 634 /*
 635  ***************************************************************************
 636  * Read stats from /proc/interrupts or /proc/softirqs.
 637  *
 638  * IN:
 639  * @file        /proc file to read (interrupts or softirqs).
 640  * @ic_nr       Number of interrupts (hard or soft) per CPU.
 641  * @curr        Position in array where current statistics will be saved.
 642  *
 643  * OUT:
 644  * @st_ic       Array for per-CPU statistics.
 645  ***************************************************************************
 646  */
 647 void read_interrupts_stat(char *file, struct stats_irqcpu *st_ic[], int ic_nr, int curr)
 648 {
 649         FILE *fp;
 650         struct stats_irq *st_irq_i;
 651         struct stats_irqcpu *p;
 652         char *line = NULL, *li;
 653         unsigned long irq = 0;
 654         unsigned int cpu;
 655         int cpu_index[cpu_nr], index = 0, len;
 656         char *cp, *next;
 657
 658         for (cpu = 0; cpu < cpu_nr; cpu++) {
 659                 st_irq_i = st_irq[curr] + cpu + 1;
 660                 st_irq_i->irq_nr = 0;
 661         }
 662
 663         if ((fp = fopen(file, "r")) != NULL) {
 664
 665                 SREALLOC(line, char, INTERRUPTS_LINE + 11 * cpu_nr);
 666
 667                 /*
 668                  * Parse header line to see which CPUs are online
 669                  */
 670                 while (fgets(line, INTERRUPTS_LINE + 11 * cpu_nr, fp) != NULL) {
 671                         next = line;
 672                         while (((cp = strstr(next, "CPU")) != NULL) && (index < cpu_nr)) {
 673                                 cpu = strtol(cp + 3, &next, 10);
 674                                 cpu_index[index++] = cpu;
 675                         }
 676                         if (index)
 677                                 /* Header line found */
 678                                 break;
 679                 }
 680
 681                 while ((fgets(line, INTERRUPTS_LINE + 11 * cpu_nr, fp) != NULL) &&
 682                        (irq < ic_nr)) {
 683
 684                         /* Skip over "<irq>:" */
 685                         if ((cp = strchr(line, ':')) == NULL)
 686                                 /* Chr ':' not found */
 687                                 continue;
 688                         cp++;
 689
 690                         p = st_ic[curr] + irq;
 691
 692                         li = line;
 693                         while (*li == ' ')
 694                                 li++;
 695
 696                         len = strcspn(li, ":");
 697                         if (len >= MAX_IRQ_LEN) {
 698                                 len = MAX_IRQ_LEN - 1;
 699                         }
 700                         strncpy(p->irq_name, li, len);
 701                         p->irq_name[len] = '\0';
 702
 703                         for (cpu = 0; cpu < index; cpu++) {
 704                                 p = st_ic[curr] + cpu_index[cpu] * ic_nr + irq;
 705                                 st_irq_i = st_irq[curr] + cpu_index[cpu] + 1;
 706                                 /*
 707                                  * No need to set (st_irqcpu + cpu * irqcpu_nr)->irq:
 708                                  * This is the same as st_irqcpu->irq.
 709                                  */
 710                                 p->interrupt = strtoul(cp, &next, 10);
 711                                 st_irq_i->irq_nr += p->interrupt;
 712                                 cp = next;
 713                         }
 714                         irq++;
 715                 }
 716
 717                 fclose(fp);
 718
 719                 free(line);
 720         }
 721
 722         while (irq < ic_nr) {
 723                 /* Nb of interrupts per processor has changed */
 724                 p = st_ic[curr] + irq;
 725                 p->irq_name[0] = '\0';  /* This value means this is a dummy interrupt */
 726                 irq++;
 727         }
 728 }
 729
 730 /*
 731  ***************************************************************************
 732  * Main loop: Read stats from the relevant sources, and display them.
 733  *
 734  * IN:
 735  * @dis_hdr     Set to TRUE if the header line must always be printed.
 736  * @rows        Number of rows of screen.
 737  ***************************************************************************
 738  */
 739 void rw_mpstat_loop(int dis_hdr, int rows)
 740 {
 741         struct stats_cpu *scc;
 742         int cpu;
 743         int curr = 1, dis = 1;
 744         unsigned long lines = rows;
 745
 746         /* Dont buffer data if redirected to a pipe */
 747         setbuf(stdout, NULL);
 748
 749         /* Read stats */
 750         if (cpu_nr > 1) {
 751                 /*
 752                  * Init uptime0. So if /proc/uptime cannot fill it,
 753                  * this will be done by /proc/stat.
 754                  */
 755                 uptime0[0] = 0;
 756                 read_uptime(&(uptime0[0]));
 757         }
 758         read_stat_cpu(st_cpu[0], cpu_nr + 1, &(uptime[0]), &(uptime0[0]));
 759
 760         if (DISPLAY_IRQ_SUM(actflags)) {
 761                 read_stat_irq(st_irq[0], 1);
 762         }
 763
 764         if (DISPLAY_IRQ_SUM(actflags) || DISPLAY_IRQ_CPU(actflags)) {
 765                 /* Read this file to display int per CPU or total nr of int per CPU */
 766                 read_interrupts_stat(INTERRUPTS, st_irqcpu, irqcpu_nr, 0);
 767         }
 768
 769         if (DISPLAY_SOFTIRQS(actflags)) {
 770                 read_interrupts_stat(SOFTIRQS, st_softirqcpu, softirqcpu_nr, 0);
 771         }
 772
 773         if (!interval) {
 774                 /* Display since boot time */
 775                 mp_tstamp[1] = mp_tstamp[0];
 776                 memset(st_cpu[1], 0, STATS_CPU_SIZE * (cpu_nr + 1));
 777                 memset(st_irq[1], 0, STATS_IRQ_SIZE * (cpu_nr + 1));
 778                 memset(st_irqcpu[1], 0, STATS_IRQCPU_SIZE * (cpu_nr + 1) * irqcpu_nr);
 779                 if (DISPLAY_SOFTIRQS(actflags)) {
 780                         memset(st_softirqcpu[1], 0, STATS_IRQCPU_SIZE * (cpu_nr + 1) * softirqcpu_nr);
 781                 }
 782                 write_stats(0, DISP_HDR);
 783                 exit(0);
 784         }
 785
 786         /* Set a handler for SIGALRM */
 787         memset(&alrm_act, 0, sizeof(alrm_act));
 788         alrm_act.sa_handler = (void *) alarm_handler;
 789         sigaction(SIGALRM, &alrm_act, NULL);
 790         alarm(interval);
 791
 792         /* Save the first stats collected. Will be used to compute the average */
 793         mp_tstamp[2] = mp_tstamp[0];
 794         uptime[2] = uptime[0];
 795         uptime0[2] = uptime0[0];
 796         memcpy(st_cpu[2], st_cpu[0], STATS_CPU_SIZE * (cpu_nr + 1));
 797         memcpy(st_irq[2], st_irq[0], STATS_IRQ_SIZE * (cpu_nr + 1));
 798         memcpy(st_irqcpu[2], st_irqcpu[0], STATS_IRQCPU_SIZE * (cpu_nr + 1) * irqcpu_nr);
 799         if (DISPLAY_SOFTIRQS(actflags)) {
 800                 memcpy(st_softirqcpu[2], st_softirqcpu[0],
 801                        STATS_IRQCPU_SIZE * (cpu_nr + 1) * softirqcpu_nr);
 802         }
 803
 804         /* Set a handler for SIGINT */
 805         memset(&int_act, 0, sizeof(int_act));
 806         int_act.sa_handler = (void *) int_handler;
 807         sigaction(SIGINT, &int_act, NULL);
 808
 809         pause();
 810
 811         if (sigint_caught)
 812                 /* SIGINT signal caught during first interval: Exit immediately */
 813                 return;
 814
 815         do {
 816                 /*
 817                  * Resetting the structure not needed since every fields will be set.
 818                  * Exceptions are per-CPU structures: Some of them may not be filled
 819                  * if corresponding processor is disabled (offline). We set them to zero
 820                  * to be able to distinguish between offline and tickless CPUs.
 821                  */
 822                 for (cpu = 1; cpu <= cpu_nr; cpu++) {
 823                         scc = st_cpu[curr] + cpu;
 824                         memset(scc, 0, STATS_CPU_SIZE);
 825                 }
 826
 827                 /* Get time */
 828                 get_localtime(&(mp_tstamp[curr]), 0);
 829
 830                 /* Read stats */
 831                 if (cpu_nr > 1) {
 832                         uptime0[curr] = 0;
 833                         read_uptime(&(uptime0[curr]));
 834                 }
 835                 read_stat_cpu(st_cpu[curr], cpu_nr + 1, &(uptime[curr]), &(uptime0[curr]));
 836
 837                 if (DISPLAY_IRQ_SUM(actflags)) {
 838                         read_stat_irq(st_irq[curr], 1);
 839                 }
 840
 841                 if (DISPLAY_IRQ_SUM(actflags) || DISPLAY_IRQ_CPU(actflags)) {
 842                         read_interrupts_stat(INTERRUPTS, st_irqcpu, irqcpu_nr, curr);
 843                 }
 844
 845                 if (DISPLAY_SOFTIRQS(actflags)) {
 846                         read_interrupts_stat(SOFTIRQS, st_softirqcpu, softirqcpu_nr, curr);
 847                 }
 848
 849                 /* Write stats */
 850                 if (!dis_hdr) {
 851                         dis = lines / rows;
 852                         if (dis) {
 853                                 lines %= rows;
 854                         }
 855                         lines++;
 856                 }
 857                 write_stats(curr, dis);
 858
 859                 if (count > 0) {
 860                         count--;
 861                 }
 862
 863                 if (count) {
 864
 865                         pause();
 866
 867                         if (sigint_caught) {
 868                                 /* SIGINT signal caught => Display average stats */
 869                                 count = 0;
 870                                 printf("\n");   /* Skip "^C" displayed on screen */
 871                         }
 872                         else {
 873                                 curr ^= 1;
 874                         }
 875                 }
 876         }
 877         while (count);
 878
 879         /* Write stats average */
 880         write_stats_avg(curr, dis_hdr);
 881 }
 882
 883 /*
 884  ***************************************************************************
 885  * Main entry to the program
 886  ***************************************************************************
 887  */
 888 int main(int argc, char **argv)
 889 {
 890         int opt = 0, i, actset = FALSE;
 891         struct utsname header;
 892         int dis_hdr = -1;
 893         int rows = 23;
 894         char *t;
 895
 896 #ifdef USE_NLS
 897         /* Init National Language Support */
 898         init_nls();
 899 #endif
 900
 901         /* Get HZ */
 902         get_HZ();
 903
 904         /* How many processors on this machine ? */
 905         cpu_nr = get_cpu_nr(~0);
 906
 907         /* Calculate number of interrupts per processor */
 908         irqcpu_nr = get_irqcpu_nr(INTERRUPTS, NR_IRQS, cpu_nr) +
 909                     NR_IRQCPU_PREALLOC;
 910         /* Calculate number of soft interrupts per processor */
 911         softirqcpu_nr = get_irqcpu_nr(SOFTIRQS, NR_IRQS, cpu_nr) +
 912                         NR_IRQCPU_PREALLOC;
 913
 914         /*
 915          * cpu_nr: a value of 2 means there are 2 processors (0 and 1).
 916          * In this case, we have to allocate 3 structures: global, proc0 and proc1.
 917          */
 918         salloc_mp_struct(cpu_nr + 1);
 919
 920         while (++opt < argc) {
 921
 922                 if (!strcmp(argv[opt], "-I")) {
 923                         if (argv[++opt]) {
 924                                 actset = TRUE;
 925                                 if (!strcmp(argv[opt], K_SUM)) {
 926                                         /* Display total number of interrupts per CPU */
 927                                         actflags |= M_D_IRQ_SUM;
 928                                 }
 929                                 else if (!strcmp(argv[opt], K_CPU)) {
 930                                         /* Display interrupts per CPU */
 931                                         actflags |= M_D_IRQ_CPU;
 932                                 }
 933                                 else if (!strcmp(argv[opt], K_SCPU)) {
 934                                         /* Display soft interrupts per CPU */
 935                                         actflags |= M_D_SOFTIRQS;
 936                                 }
 937                                 else if (!strcmp(argv[opt], K_ALL)) {
 938                                         actflags |= M_D_IRQ_SUM + M_D_IRQ_CPU + M_D_SOFTIRQS;
 939                                 }
 940                                 else {
 941                                         usage(argv[0]);
 942                                 }
 943                         }
 944                         else {
 945                                 usage(argv[0]);
 946                         }
 947                 }
 948
 949                 else if (!strcmp(argv[opt], "-P")) {
 950                         /* '-P ALL' can be used on UP machines */
 951                         if (argv[++opt]) {
 952                                 flags |= F_P_OPTION;
 953                                 dis_hdr++;
 954
 955                                 for (t = strtok(argv[opt], ","); t; t = strtok(NULL, ",")) {
 956                                         if (!strcmp(t, K_ALL) || !strcmp(t, K_ON)) {
 957                                                 if (cpu_nr) {
 958                                                         dis_hdr = 9;
 959                                                 }
 960                                                 /*
 961                                                  * Set bit for every processor.
 962                                                  * Also indicate to display stats for CPU 'all'.
 963                                                  */
 964                                                 memset(cpu_bitmap, 0xff, ((cpu_nr + 1) >> 3) + 1);
 965                                                 if (!strcmp(t, K_ON)) {
 966                                                         /* Display stats only for online CPU */
 967                                                         flags |= F_P_ON;
 968                                                 }
 969                                         }
 970                                         else {
 971                                                 if (strspn(t, DIGITS) != strlen(t)) {
 972                                                         usage(argv[0]);
 973                                                 }
 974                                                 i = atoi(t);    /* Get cpu number */
 975                                                 if (i >= cpu_nr) {
 976                                                         fprintf(stderr, _("Not that many processors!\n"));
 977                                                         exit(1);
 978                                                 }
 979                                                 i++;
 980                                                 *(cpu_bitmap + (i >> 3)) |= 1 << (i & 0x07);
 981                                         }
 982                                 }
 983                         }
 984                         else {
 985                                 usage(argv[0]);
 986                         }
 987                 }
 988
 989                 else if (!strncmp(argv[opt], "-", 1)) {
 990                         for (i = 1; *(argv[opt] + i); i++) {
 991
 992                                 switch (*(argv[opt] + i)) {
 993
 994                                 case 'A':
 995                                         actflags |= M_D_CPU + M_D_IRQ_SUM + M_D_IRQ_CPU + M_D_SOFTIRQS;
 996                                         actset = TRUE;
 997                                         /* Select all processors */
 998                                         flags |= F_P_OPTION;
 999                                         memset(cpu_bitmap, 0xff, ((cpu_nr + 1) >> 3) + 1);
1000                                         break;
1001
1002                                 case 'u':
1003                                         /* Display CPU */
1004                                         actflags |= M_D_CPU;
1005                                         break;
1006
1007                                 case 'V':
1008                                         /* Print version number */
1009                                         print_version();
1010                                         break;
1011
1012                                 default:
1013                                         usage(argv[0]);
1014                                 }
1015                         }
1016                 }
1017
1018                 else if (interval < 0) {
1019                         /* Get interval */
1020                         if (strspn(argv[opt], DIGITS) != strlen(argv[opt])) {
1021                                 usage(argv[0]);
1022                         }
1023                         interval = atol(argv[opt]);
1024                         if (interval < 0) {
1025                                 usage(argv[0]);
1026                         }
1027                         count = -1;
1028                 }
1029
1030                 else if (count <= 0) {
1031                         /* Get count value */
1032                         if ((strspn(argv[opt], DIGITS) != strlen(argv[opt])) ||
1033                             !interval) {
1034                                 usage(argv[0]);
1035                         }
1036                         count = atol(argv[opt]);
1037                         if (count < 1) {
1038                                 usage(argv[0]);
1039                         }
1040                 }
1041
1042                 else {
1043                         usage(argv[0]);
1044                 }
1045         }
1046
1047         /* Default: Display CPU */
1048         if (!actset) {
1049                 actflags |= M_D_CPU;
1050         }
1051
1052         if (count_bits(&actflags, sizeof(unsigned int)) > 1) {
1053                 dis_hdr = 9;
1054         }
1055
1056         if (!USE_P_OPTION(flags)) {
1057                 /* Option -P not used: Set bit 0 (global stats among all proc) */
1058                 *cpu_bitmap = 1;
1059         }
1060         if (dis_hdr < 0) {
1061                 dis_hdr = 0;
1062         }
1063         if (!dis_hdr) {
1064                 /* Get window size */
1065                 rows = get_win_height();
1066         }
1067         if (interval < 0) {
1068                 /* Interval not set => display stats since boot time */
1069                 interval = 0;
1070         }
1071
1072         /* Get time */
1073         get_localtime(&(mp_tstamp[0]), 0);
1074
1075         /* Get system name, release number and hostname */
1076         uname(&header);
1077         print_gal_header(&(mp_tstamp[0]), header.sysname, header.release,
1078                          header.nodename, header.machine, cpu_nr);
1079
1080         /* Main loop */
1081         rw_mpstat_loop(dis_hdr, rows);
1082
1083         /* Free structures */
1084         sfree_mp_struct();
1085
1086         return 0;
1087 }