「Timevar print」を編集中

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== 概要 ==
*[[gcc-4.1.0/gcc/timevar.c]]にて定義
*時間の表示

== 引数 ==
*FILE *fp

== 実装 ==
<code>
 379 /* Summarize timing variables to FP.  The timing variable TV_TOTAL has
 380    a special meaning -- it's considered to be the total elapsed time,
 381    for normalizing the others, and is displayed last.  */
 382 
 383 void
 384 timevar_print (FILE *fp)
 385 {
 386   /* Only print stuff if we have some sort of time information.  */
 387 #if defined ([[HAVE_USER_TIME]]) || defined ([[HAVE_SYS_TIME]]) || defined ([[HAVE_WALL_TIME]])
 388   unsigned int /* timevar_id_t */ id;
 389   [[struct timevar_time_def]] *total = &[[timevars]][[[TV_TOTAL]]].elapsed;
 390   [[struct timevar_time_def]] now;
 391 
 392   if (![[timevar_enable]])
 393     return;
 394 
 395   /* Update timing information in case we're calling this from GDB.  */
 396 
 397   if (fp == 0)
 398     fp = stderr;
 399 
 400   /* What time is it?  */
 401   [[get_time]] (&now);
 402 
 403   /* If the stack isn't empty, attribute the current elapsed time to
 404      the old topmost element.  */
 405   if ([[stack]])
 406     [[timevar_accumulate]] (&stack->timevar->elapsed, &start_time, &now);
 407 
 408   /* Reset the start time; from now on, time is attributed to
 409      TIMEVAR.  */
 410   start_time = now;
 411 
 412   fputs (_("\nExecution times (seconds)\n"), fp);
 413   for (id = 0; id < (unsigned int) [[TIMEVAR_LAST]]; ++id)
 414     {
 415       [[struct timevar_def]] *tv = &[[timevars]][([[timevar_id_t]]) id];
 416       const double tiny = 5e-3;
 417 
</code>
*[[timvar_id_t]]の最後か、使用していないtvであったらcontinue
<code>
 418       /* Don't print the total execution time here; that goes at the
 419          end.  */
 420       if (([[timevar_id_t]]) id == [[TV_TOTAL]])
 421         continue;
 422 
 423       /* Don't print timing variables that were never used.  */
 424       if (!tv->used)
 425         continue;
 426 
</code>
*余りにも微小な値の場合もcontinue
<code>
 427       /* Don't print timing variables if we're going to get a row of
 428          zeroes.  */
 429       if (tv->elapsed.user < tiny
 430           && tv->elapsed.sys < tiny
 431           && tv->elapsed.wall < tiny
 432           && tv->elapsed.ggc_mem < [[GGC_MEM_BOUND]])
 433         continue;
 434 
</code>
*表示
<code>
 435       /* The timing variable name.  */
 436       fprintf (fp, " %-22s:", tv->name);
 437 
 438 #ifdef [[HAVE_USER_TIME]]
 439       /* Print user-mode time for this process.  */
 440       fprintf (fp, "%7.2f (%2.0f%%) usr",
 441                tv->elapsed.user,
 442                (total->user == 0 ? 0 : tv->elapsed.user / total->user) * 100);
 443 #endif /* HAVE_USER_TIME */
 444 
 445 #ifdef [[HAVE_SYS_TIME]]
 446       /* Print system-mode time for this process.  */
 447       fprintf (fp, "%7.2f (%2.0f%%) sys",
 448                tv->elapsed.sys,
 449                (total->sys == 0 ? 0 : tv->elapsed.sys / total->sys) * 100);
 450 #endif /* HAVE_SYS_TIME */
 451 
 452 #ifdef [[HAVE_WALL_TIME]]
 453       /* Print wall clock time elapsed.  */
 454       fprintf (fp, "%7.2f (%2.0f%%) wall",
 455                tv->elapsed.wall,
 456                (total->wall == 0 ? 0 : tv->elapsed.wall / total->wall) * 100);
 457 #endif /* HAVE_WALL_TIME */
 458 
 459       /* Print the amount of ggc memory allocated.  */
 460       fprintf (fp, "%8u kB (%2.0f%%) ggc",
 461                (unsigned) (tv->elapsed.ggc_mem >> 10),
 462                (total->ggc_mem == 0
 463                 ? 0
 464                 : (float) tv->elapsed.ggc_mem / total->ggc_mem) * 100);
 465 
 466       putc ('\n', fp);
 467     }
 468 
 469   /* Print total time.  */
 470   fputs (_(" TOTAL                 :"), fp);
 471 #ifdef [[HAVE_USER_TIME]]
 472   fprintf (fp, "%7.2f          ", total->user);
 473 #endif
 474 #ifdef [[HAVE_SYS_TIME]]
 475   fprintf (fp, "%7.2f          ", total->sys);
 476 #endif
 477 #ifdef [[HAVE_WALL_TIME]]
 478   fprintf (fp, "%7.2f           ", total->wall);
 479 #endif
 480   fprintf (fp, "%8u kB\n", (unsigned) (total->ggc_mem >> 10));
 481 
 482 #ifdef [[ENABLE_CHECKING]]
 483   fprintf (fp, "Extra diagnostic checks enabled; compiler may run slowly.\n");
 484   fprintf (fp, "Configure with --disable-checking to disable checks.\n");
 485 #endif
 486 
 487 #endif /* defined (HAVE_USER_TIME) || defined (HAVE_SYS_TIME)
 488           || defined (HAVE_WALL_TIME) */
 489 }
</code>

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