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   1 /* Copyright © 2013, Intel Corporation
   2  *
   3  * Permission is hereby granted, free of charge, to any person obtaining a copy
   4  * of this software and associated documentation files (the "Software"), to deal
   5  * in the Software without restriction, including without limitation the rights
   6  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
   7  * copies of the Software, and to permit persons to whom the Software is
   8  * furnished to do so, subject to the following conditions:
   9  *
  10  * The above copyright notice and this permission notice shall be included in
  11  * all copies or substantial portions of the Software.
  12  *
  13  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  14  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  15  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  16  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  17  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  18  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  19  * THE SOFTWARE.
  20  */
  21
  22 #define _GNU_SOURCE
  23
  24 #include <stdio.h>
  25 #include <stdlib.h>
  26 #include <assert.h>
  27 #include <sys/time.h>
  28
  29 #include "fips-dispatch-gl.h"
  30
  31 #include "metrics.h"
  32 #include "context.h"
  33 #include "metrics-info.h"
  34 #include "xmalloc.h"
  35
  36 int frames;
  37 int verbose;
  38
  39 #define MAX_MONITORS_IN_FLIGHT 1000
  40
  41 static const char *
  42 metrics_op_string (metrics_op_t op)
  43 {
  44         if (op >= METRICS_OP_SHADER)
  45                 return "Shader program";
  46
  47         switch (op)
  48         {
  49         case METRICS_OP_ACCUM:
  50                 return "glAccum*(+)";
  51         case METRICS_OP_BUFFER_DATA:
  52                 return "glBufferData(+)";
  53         case METRICS_OP_BUFFER_SUB_DATA:
  54                 return "glCopyBufferSubData*";
  55         case METRICS_OP_BITMAP:
  56                 return "glBitmap*";
  57         case METRICS_OP_BLIT_FRAMEBUFFER:
  58                 return "glBlitFramebuffer*";
  59         case METRICS_OP_CLEAR:
  60                 return "glClear(+)";
  61         case METRICS_OP_CLEAR_BUFFER_DATA:
  62                 return "glCearBufferData(+)";
  63         case METRICS_OP_CLEAR_TEX_IMAGE:
  64                 return "glClearTexImage(+)";
  65         case METRICS_OP_COPY_PIXELS:
  66                 return "glCopyPixels";
  67         case METRICS_OP_COPY_TEX_IMAGE:
  68                 return "glCopyTexImage(+)";
  69         case METRICS_OP_DRAW_PIXELS:
  70                 return "glDrawPixels";
  71         case METRICS_OP_GET_TEX_IMAGE:
  72                 return "glGetTexImage(+)";
  73         case METRICS_OP_READ_PIXELS:
  74                 return "glReadPixels*";
  75         case METRICS_OP_TEX_IMAGE:
  76                 return "glTexImage*(+)";
  77         default:
  78                 fprintf (stderr, "fips: Internal error: "
  79                          "Unknown metrics op value: %d\n", op);
  80                 exit (1);
  81         }
  82
  83         return "";
  84 }
  85
  86 void
  87 metrics_counter_start (void)
  88 {
  89         context_t *ctx = context_get_current ();
  90         metrics_t *metrics = &ctx->metrics;
  91         unsigned i;
  92
  93         /* Initialize the timer_query and monitor objects */
  94         glGenQueries (1, &metrics->timer_begun_id);
  95
  96         glGenPerfMonitorsAMD (1, &metrics->monitor_begun_id);
  97
  98         for (i = 0; i < ctx->metrics_info.num_groups; i++)
  99         {
 100                 metrics_group_info_t *group;
 101                 int num_counters;
 102
 103                 group = &ctx->metrics_info.groups[i];
 104
 105                 num_counters = group->num_counters;
 106                 if (group->max_active_counters < group->num_counters)
 107                 {
 108                         fprintf (stderr, "Warning: Only monitoring %d/%d counters from group %d\n",
 109                                  group->max_active_counters,
 110                                  group->num_counters, i);
 111                         num_counters = group->max_active_counters;
 112
 113                 }
 114
 115                 glSelectPerfMonitorCountersAMD(metrics->monitor_begun_id,
 116                                                GL_TRUE, group->id,
 117                                                num_counters,
 118                                                group->counter_ids);
 119         }
 120
 121         /* Start the queries */
 122         glBeginQuery (GL_TIME_ELAPSED, metrics->timer_begun_id);
 123
 124         glBeginPerfMonitorAMD (metrics->monitor_begun_id);
 125 }
 126
 127 void
 128 metrics_counter_stop (void)
 129 {
 130         context_t *ctx = context_get_current ();
 131         metrics_t *metrics = &ctx->metrics;
 132         timer_query_t *timer;
 133         monitor_t *monitor;
 134
 135         /* Stop the current timer and monitor. */
 136         glEndQuery (GL_TIME_ELAPSED);
 137         glEndPerfMonitorAMD (metrics->monitor_begun_id);
 138
 139         /* Add these IDs to our lists of outstanding queries and
 140          * monitors so the results can be collected later. */
 141         timer = xmalloc (sizeof (timer_query_t));
 142
 143         timer->op = metrics->op;
 144         timer->id = metrics->timer_begun_id;
 145         timer->next = NULL;
 146
 147         if (metrics->timer_tail) {
 148                 metrics->timer_tail->next = timer;
 149                 metrics->timer_tail = timer;
 150         } else {
 151                 metrics->timer_tail = timer;
 152                 metrics->timer_head = timer;
 153         }
 154
 155         /* Create a new performance-monitor query */
 156         monitor = xmalloc (sizeof (monitor_t));
 157
 158         monitor->op = metrics->op;
 159         monitor->id = metrics->monitor_begun_id;
 160         monitor->next = NULL;
 161
 162         if (metrics->monitor_tail) {
 163                 metrics->monitor_tail->next = monitor;
 164                 metrics->monitor_tail = monitor;
 165         } else {
 166                 metrics->monitor_tail = monitor;
 167                 metrics->monitor_head = monitor;
 168         }
 169
 170         metrics->monitors_in_flight++;
 171
 172         /* Avoid being a resource hog and collect outstanding results
 173          * once we have sent off a large number of
 174          * queries. (Presumably, many of the outstanding queries are
 175          * available by now.)
 176          */
 177         if (metrics->monitors_in_flight > MAX_MONITORS_IN_FLIGHT)
 178                 metrics_collect_available ();
 179 }
 180
 181 void
 182 metrics_set_current_op (metrics_op_t op)
 183 {
 184         context_t *ctx = context_get_current ();
 185         metrics_t *metrics = &ctx->metrics;
 186
 187         metrics->op = op;
 188 }
 189
 190 metrics_op_t
 191 metrics_get_current_op (void)
 192 {
 193         context_t *ctx = context_get_current ();
 194         metrics_t *metrics = &ctx->metrics;
 195
 196         return metrics->op;
 197 }
 198
 199 static void
 200 op_metrics_init (context_t *ctx, op_metrics_t *metrics, metrics_op_t op)
 201 {
 202         metrics_info_t *info = &ctx->metrics_info;
 203         unsigned i, j;
 204
 205         metrics->op = op;
 206         metrics->time_ns = 0.0;
 207
 208         metrics->counters = xmalloc (sizeof(double *) * info->num_groups);
 209
 210         for (i = 0; i < info->num_groups; i++) {
 211                 metrics->counters[i] = xmalloc (sizeof (double) *
 212                                                 info->groups[i].num_counters);
 213                 for (j = 0; j < info->groups[i].num_counters; j++)
 214                         metrics->counters[i][j] = 0.0;
 215         }
 216 }
 217
 218 static op_metrics_t *
 219 ctx_get_op_metrics (context_t *ctx, metrics_op_t op)
 220 {
 221         metrics_t *metrics = &ctx->metrics;
 222         unsigned i;
 223
 224         if (op >= metrics->num_op_metrics)
 225         {
 226                 metrics->op_metrics = realloc (metrics->op_metrics,
 227                                                (op + 1) * sizeof (op_metrics_t));
 228                 for (i = metrics->num_op_metrics; i < op + 1; i++)
 229                         op_metrics_init (ctx, &metrics->op_metrics[i], i);
 230
 231                 metrics->num_op_metrics = op + 1;
 232         }
 233
 234         return &metrics->op_metrics[op];
 235 }
 236
 237 static void
 238 accumulate_program_metrics (metrics_op_t op, GLuint *result, GLuint size)
 239 {
 240 #define CONSUME(var)                                                    \
 241         if (p + sizeof(var) > ((unsigned char *) result) + size)        \
 242         {                                                               \
 243                 fprintf (stderr, "Unexpected end-of-buffer while "      \
 244                          "parsing results\n");                          \
 245                 break;                                                  \
 246         }                                                               \
 247         (var) = *((typeof(var) *) p);                                   \
 248         p += sizeof(var);
 249
 250         context_t *ctx = context_get_current ();
 251         metrics_info_t *info = &ctx->metrics_info;
 252         op_metrics_t *metrics = ctx_get_op_metrics (ctx, op);
 253         unsigned char *p = (unsigned char *) result;
 254
 255         while (p < ((unsigned char *) result) + size)
 256         {
 257                 GLuint group_id, group_index;
 258                 GLuint counter_id, counter_index;
 259                 metrics_group_info_t *group;
 260                 double value;
 261                 unsigned i;
 262
 263                 CONSUME (group_id);
 264                 CONSUME (counter_id);
 265
 266                 for (i = 0; i < info->num_groups; i++) {
 267                         if (info->groups[i].id == group_id)
 268                                 break;
 269                 }
 270                 group_index = i;
 271                 assert (group_index < info->num_groups);
 272                 group = &info->groups[group_index];
 273
 274                 for (i = 0; i < group->num_counters; i++) {
 275                         if (group->counter_ids[i] == counter_id)
 276                                 break;
 277                 }
 278                 counter_index = i;
 279                 assert (counter_index < group->num_counters);
 280
 281                 switch (group->counter_types[counter_index])
 282                 {
 283                         uint uint_value;
 284                         uint64_t uint64_value;
 285                         float float_value;
 286                 case GL_UNSIGNED_INT:
 287                         CONSUME (uint_value);
 288                         value = uint_value;
 289                         break;
 290                 case GL_UNSIGNED_INT64_AMD:
 291                         CONSUME (uint64_value);
 292                         value = uint64_value;
 293                         break;
 294                 case GL_PERCENTAGE_AMD:
 295                 case GL_FLOAT:
 296                         CONSUME (float_value);
 297                         value = float_value;
 298                         break;
 299                 default:
 300                         fprintf (stderr, "fips: Warning: Unknown counter value type (%d)\n",
 301                                  group->counter_types[counter_index]);
 302                         value = 0.0;
 303                         break;
 304                 }
 305
 306                 metrics->counters[group_index][counter_index] += value;
 307         }
 308 }
 309
 310 static void
 311 accumulate_program_time (metrics_op_t op, unsigned time_ns)
 312 {
 313         context_t *ctx = context_get_current ();
 314         op_metrics_t *metrics;
 315
 316         metrics = ctx_get_op_metrics (ctx, op);
 317
 318         metrics->time_ns += time_ns;
 319 }
 320
 321 typedef struct per_stage_metrics
 322 {
 323         op_metrics_t *metrics;
 324         shader_stage_info_t *stage;
 325         double time_ns;
 326         double active;
 327 } per_stage_metrics_t;
 328
 329 static int
 330 _is_shader_stage_counter (metrics_info_t *info,
 331                           unsigned group_index,
 332                           unsigned counter_index)
 333 {
 334         shader_stage_info_t *stage;
 335         unsigned i;
 336
 337         for (i = 0; i < info->num_shader_stages; i++) {
 338                 stage = &info->stages[i];
 339
 340                 if (stage->active_group_index == group_index &&
 341                     stage->active_counter_index == counter_index)
 342                 {
 343                         return 1;
 344                 }
 345
 346                 if (stage->stall_group_index == group_index &&
 347                     stage->stall_counter_index == counter_index)
 348                 {
 349                         return 1;
 350                 }
 351         }
 352
 353         return 0;
 354 }
 355
 356 static void
 357 print_per_stage_metrics (context_t *ctx,
 358                          per_stage_metrics_t *per_stage,
 359                          double total)
 360 {
 361         metrics_info_t *info = &ctx->metrics_info;
 362         op_metrics_t *metric = per_stage->metrics;
 363         metrics_group_info_t *group;
 364         const char *op_string;
 365         unsigned group_index, counter;
 366         double value;
 367
 368         /* Don't print anything for stages with no alloted time. */
 369         if (per_stage->time_ns == 0.0)
 370                 return;
 371
 372         op_string = metrics_op_string (metric->op);
 373
 374         printf ("%21s", op_string);
 375
 376         if (metric->op >= METRICS_OP_SHADER) {
 377                 printf (" %3d", metric->op - METRICS_OP_SHADER);
 378         } else {
 379                 printf ("    ");
 380
 381         }
 382
 383         if (per_stage->stage)
 384                 printf (" %cS:", per_stage->stage->name[0]);
 385         else
 386                 printf ("   :");
 387
 388         printf ("\t%7.2f ms (%4.1f%%)",
 389                 per_stage->time_ns / 1e6,
 390                 per_stage->time_ns / total * 100);
 391
 392         if (per_stage->active)
 393                 printf (", %4.1f%% active", per_stage->active * 100);
 394
 395         printf ("\n");
 396
 397         /* I'm not seeing a lot of value printing the rest of these
 398          * performance counters by default yet. Use --verbose to get
 399          * them for now. */
 400         if (! verbose)
 401                 return;
 402
 403         printf ("[");
 404         for (group_index = 0; group_index < info->num_groups; group_index++) {
 405                 group = &info->groups[group_index];
 406                 for (counter = 0; counter < group->num_counters; counter++) {
 407
 408                         /* Don't print this counter value if it's a
 409                          * per-stage cycle counter, (which we have
 410                          * already accounted for). */
 411                         if (_is_shader_stage_counter (info, group_index, counter))
 412                                 continue;
 413
 414                         value = metric->counters[group_index][counter];
 415                         if (value == 0.0)
 416                                 continue;
 417                         printf ("%s: %.2f ", group->counter_names[counter],
 418                                 value / 1e6);
 419                 }
 420         }
 421         printf ("]\n");
 422 }
 423
 424 static int
 425 time_compare(const void *in_a, const void *in_b, void *arg unused)
 426 {
 427         const per_stage_metrics_t *a = in_a;
 428         const per_stage_metrics_t *b = in_b;
 429
 430
 431         if (a->time_ns < b->time_ns)
 432                 return -1;
 433         if (a->time_ns > b->time_ns)
 434                 return 1;
 435         return 0;
 436 }
 437
 438 static void
 439 print_program_metrics (void)
 440 {
 441         context_t *ctx = context_get_current ();
 442         metrics_t *metrics = &ctx->metrics;
 443         metrics_info_t *info = &ctx->metrics_info;
 444         unsigned num_shader_stages = info->num_shader_stages;
 445         per_stage_metrics_t *sorted, *per_stage;
 446         double total_time, op_cycles;
 447         op_metrics_t *op;
 448         unsigned group_index, counter_index;
 449         unsigned i, j, num_sorted;
 450
 451         /* Make a sorted list of the per-stage operations by time
 452          * used, and figure out the total so we can print percentages.
 453          */
 454         num_sorted = metrics->num_op_metrics * num_shader_stages;
 455
 456         sorted = xmalloc (sizeof (*sorted) * num_sorted);
 457
 458         total_time = 0.0;
 459
 460         for (i = 0; i < metrics->num_op_metrics; i++) {
 461
 462                 op = &metrics->op_metrics[i];
 463
 464                 /* Accumulate total time across all ops. */
 465                 total_time += op->time_ns;
 466
 467                 /* Also, find total cycles in all stages of this op. */
 468                 op_cycles = 0.0;
 469
 470                 for (j = 0; j < num_shader_stages; j++) {
 471                         /* Active cycles */
 472                         group_index = info->stages[j].active_group_index;
 473                         counter_index = info->stages[j].active_counter_index;
 474                         op_cycles += op->counters[group_index][counter_index];
 475
 476                         /* Stall cycles */
 477                         group_index = info->stages[j].stall_group_index;
 478                         counter_index = info->stages[j].stall_counter_index;
 479                         op_cycles += op->counters[group_index][counter_index];
 480                 }
 481
 482                 for (j = 0; j < num_shader_stages; j++) {
 483                         double active_cycles, stall_cycles, stage_cycles;
 484
 485                         /* Active cycles */
 486                         group_index = info->stages[j].active_group_index;
 487                         counter_index = info->stages[j].active_counter_index;
 488                         active_cycles = op->counters[group_index][counter_index];
 489
 490                         /* Stall cycles */
 491                         group_index = info->stages[j].stall_group_index;
 492                         counter_index = info->stages[j].stall_counter_index;
 493                         stall_cycles = op->counters[group_index][counter_index];
 494
 495                         stage_cycles = active_cycles + stall_cycles;
 496
 497                         per_stage = &sorted[i * num_shader_stages + j];
 498                         per_stage->metrics = op;
 499
 500                         if (op_cycles) {
 501                                 per_stage->stage = &info->stages[j];
 502                                 per_stage->time_ns = op->time_ns * (stage_cycles / op_cycles);
 503                         } else {
 504                                 /* If we don't have any per-stage cycle counts
 505                                  * for this operation, then use the first
 506                                  * stage as a placeholder for all the time,
 507                                  * but NULL-ify the stage info so that the
 508                                  * report doesn't lie about this time being
 509                                  * from any particular stage. */
 510                                 per_stage->stage = NULL;
 511                                 if (j == 0) {
 512                                         per_stage->time_ns = op->time_ns;
 513                                 } else {
 514                                         per_stage->time_ns = 0.0;
 515                                 }
 516                         }
 517
 518                         if (stage_cycles) {
 519                                 per_stage->active = active_cycles / stage_cycles;
 520                         } else {
 521                                 per_stage->active = 0.0;
 522                         }
 523                 }
 524         }
 525
 526         qsort_r (sorted, num_sorted, sizeof (*sorted),
 527                  time_compare, metrics->op_metrics);
 528
 529         for (i = 0; i < num_sorted; i++)
 530                 print_per_stage_metrics (ctx, &sorted[i], total_time);
 531
 532         free (sorted);
 533 }
 534
 535 /* Called at program exit.
 536  *
 537  * This is similar to metrics_info_fini, but only frees any used
 538  * memory. Notably, it does not call any OpenGL functions, (since the
 539  * OpenGL context no longer exists at program exit).
 540  */
 541 static void
 542 metrics_exit (void)
 543 {
 544         context_t *ctx = context_get_current ();
 545         metrics_t *metrics = &ctx->metrics;
 546         metrics_info_t *info = &ctx->metrics_info;
 547         unsigned i, j;
 548         timer_query_t *timer, *timer_next;
 549         monitor_t *monitor, *monitor_next;
 550
 551         if (verbose)
 552                 printf ("fips: terminating\n");
 553
 554         if (! info->initialized)
 555                 return;
 556
 557         for (timer = metrics->timer_head;
 558              timer;
 559              timer = timer_next)
 560         {
 561                 timer_next = timer->next;
 562                 free (timer);
 563         }
 564
 565         for (monitor = metrics->monitor_head;
 566              monitor;
 567              monitor = monitor_next)
 568         {
 569                 monitor_next = monitor->next;
 570                 free (monitor);
 571         }
 572
 573         for (i = 0; i < info->num_groups; i++) {
 574                 metrics_group_info_t *group = &info->groups[i];
 575
 576                 for (j = 0; j < group->num_counters; i++)
 577                         free (group->counter_names[j]);
 578
 579                 free (group->counter_types);
 580                 free (group->counter_names);
 581                 free (group->counter_ids);
 582
 583                 free (group->name);
 584         }
 585
 586         free (info->groups);
 587
 588         for (i = 0; i < info->num_shader_stages; i++)
 589                 free (info->stages[i].name);
 590
 591         free (info->stages);
 592 }
 593
 594 void
 595 metrics_collect_available (void)
 596 {
 597         context_t *ctx = context_get_current ();
 598         metrics_t *metrics = &ctx->metrics;
 599
 600         /* Consume all timer queries that are ready. */
 601         timer_query_t *timer = metrics->timer_head;
 602
 603         while (timer) {
 604                 GLuint available, elapsed;
 605
 606                 glGetQueryObjectuiv (timer->id,
 607                                      GL_QUERY_RESULT_AVAILABLE, &available);
 608                 if (! available)
 609                         break;
 610
 611                 glGetQueryObjectuiv (timer->id,
 612                                      GL_QUERY_RESULT, &elapsed);
 613
 614                 accumulate_program_time (timer->op, elapsed);
 615
 616                 metrics->timer_head = timer->next;
 617                 if (metrics->timer_head == NULL)
 618                         metrics->timer_tail = NULL;
 619
 620                 glDeleteQueries (1, &timer->id);
 621
 622                 free (timer);
 623                 timer = metrics->timer_head;
 624         }
 625
 626         /* And similarly for all performance monitors that are ready. */
 627         monitor_t *monitor = metrics->monitor_head;
 628
 629         while (monitor) {
 630                 GLuint available, result_size, *result;
 631                 GLint bytes_written;
 632
 633                 glGetPerfMonitorCounterDataAMD (monitor->id,
 634                                                 GL_PERFMON_RESULT_AVAILABLE_AMD,
 635                                                 sizeof (available), &available,
 636                                                 NULL);
 637                 if (! available)
 638                         break;
 639
 640                 glGetPerfMonitorCounterDataAMD (monitor->id,
 641                                                 GL_PERFMON_RESULT_SIZE_AMD,
 642                                                 sizeof (result_size),
 643                                                 &result_size, NULL);
 644
 645                 result = xmalloc (result_size);
 646
 647                 glGetPerfMonitorCounterDataAMD (monitor->id,
 648                                                 GL_PERFMON_RESULT_AMD,
 649                                                 result_size, result,
 650                                                 &bytes_written);
 651
 652                 accumulate_program_metrics (monitor->op, result, result_size);
 653
 654                 free (result);
 655
 656                 metrics->monitor_head = monitor->next;
 657                 if (metrics->monitor_head == NULL)
 658                         metrics->monitor_tail = NULL;
 659
 660                 glDeletePerfMonitorsAMD (1, &monitor->id);
 661
 662                 free (monitor);
 663
 664                 metrics->monitors_in_flight--;
 665
 666                 monitor = metrics->monitor_head;
 667         }
 668 }
 669
 670
 671 void
 672 metrics_end_frame (void)
 673 {
 674         static int initialized = 0;
 675         static struct timeval tv_start, tv_now;
 676
 677         if (! initialized) {
 678                 gettimeofday (&tv_start, NULL);
 679                 atexit (metrics_exit);
 680                 if (getenv ("FIPS_VERBOSE"))
 681                         verbose = 1;
 682                 initialized = 1;
 683         }
 684
 685         frames++;
 686
 687         metrics_collect_available ();
 688
 689         if (frames % 15 == 0) {
 690                 double fps;
 691
 692                 gettimeofday (&tv_now, NULL);
 693
 694                 fps = (double) frames / (tv_now.tv_sec - tv_start.tv_sec +
 695                                          (tv_now.tv_usec - tv_start.tv_usec) / 1.0e6);
 696
 697                 printf("FPS: %.3f\n", fps);
 698
 699                 print_program_metrics ();
 700         }
 701 }
 702
 703 void
 704 metrics_init (metrics_t *metrics)
 705 {
 706         metrics->op = 0;
 707
 708         metrics->timer_begun_id = 0;
 709
 710         metrics->timer_head = NULL;
 711         metrics->timer_tail = NULL;
 712
 713         metrics->monitor_begun_id = 0;
 714
 715         metrics->monitor_head = NULL;
 716         metrics->monitor_tail = NULL;
 717
 718         metrics->monitors_in_flight = 0;
 719
 720         metrics->num_op_metrics = 0;
 721         metrics->op_metrics = NULL;
 722 }
 723
 724 void
 725 metrics_fini (metrics_t *metrics)
 726 {
 727         timer_query_t *timer, *timer_next;
 728         monitor_t *monitor, *monitor_next;
 729
 730         /* Since these metrics are going away, let's first collect
 731          * whatever results might already be available. */
 732         metrics_collect_available ();
 733
 734         /* If, after collection, any queries are still outstanding,
 735          * just give up and clean them up. */
 736         if (metrics->timer_begun_id) {
 737                 glEndQuery (GL_TIME_ELAPSED);
 738                 glDeleteQueries (1, &metrics->timer_begun_id);
 739                 metrics->timer_begun_id = 0;
 740         }
 741
 742         for (timer = metrics->timer_head;
 743              timer;
 744              timer = timer_next)
 745         {
 746                 glDeleteQueries (1, &timer->id);
 747                 timer_next = timer->next;
 748                 free (timer);
 749         }
 750         metrics->timer_head = NULL;
 751         metrics->timer_tail = NULL;
 752
 753         if (metrics->monitor_begun_id) {
 754                 glEndPerfMonitorAMD (metrics->monitor_begun_id);
 755                 glDeletePerfMonitorsAMD (1, &metrics->monitor_begun_id);
 756                 metrics->monitor_begun_id = 0;
 757         }
 758
 759         for (monitor = metrics->monitor_head;
 760              monitor;
 761              monitor = monitor_next)
 762         {
 763                 glDeletePerfMonitorsAMD (1, &monitor->id);
 764                 monitor_next = monitor->next;
 765                 free (monitor);
 766         }
 767         metrics->monitor_head = NULL;
 768         metrics->monitor_tail = NULL;
 769
 770         metrics->monitors_in_flight = 0;
 771
 772 }