WDL/timing.c

   1 #include "timing.h"
   2
   3 #ifdef TIMING
   4
   5 #include <stdio.h>
   6 #ifdef _WIN32
   7 #include <windows.h>
   8 #endif
   9
  10 static struct {
  11         __int64 st_time;
  12         __int64 cycles,mint,maxt;
  13   int foo;
  14         int calls;
  15 } timingInfo[64];
  16
  17
  18 static void rdtsc(__int64 *t)
  19 {
  20 #ifdef _WIN64
  21   LARGE_INTEGER now;
  22   QueryPerformanceCounter(&now);
  23   *t = now.QuadPart;
  24 #elif !defined(_WIN32)
  25   struct timeval tm={0,};
  26   gettimeofday(&tm,NULL);
  27   *t = ((__int64)tm.tv_sec)*1000000 + (__int64)tm.tv_usec;
  28 #else
  29         __asm
  30         {
  31                 mov esi, t
  32                 _emit 0xf
  33                 _emit 0x31
  34                 mov [esi], eax
  35                 mov [esi+4], edx
  36         }
  37 #endif
  38 }
  39
  40 void _timingInit(void)
  41 {
  42         memset(timingInfo,0,sizeof(timingInfo));
  43 }
  44
  45 void _timingEnter(int which)
  46 {
  47   rdtsc(&timingInfo[which].st_time);
  48 }
  49
  50 void _timingLeave(int which)
  51 {
  52   __int64 t;
  53   rdtsc(&t);
  54   t -= timingInfo[which].st_time;
  55   if (!timingInfo[which].mint || t < timingInfo[which].mint) timingInfo[which].mint=t?t:1;
  56   if (t > timingInfo[which].maxt) timingInfo[which].maxt=t;
  57   timingInfo[which].cycles += t;
  58   timingInfo[which].calls += 1;
  59 }
  60
  61 void _timingPrint(void)
  62 {
  63         int x,p=0;
  64         for (x = 0; x < sizeof(timingInfo)/sizeof(timingInfo[0]); x ++)
  65         {
  66     char buf[512];
  67                 if (timingInfo[x].calls)
  68     {
  69       p++;
  70                         sprintf(buf,"%d: %d calls, %.4f clocks/call (min=%.4f, max=%.4f). %.8f thingies of CPU time spent\n",
  71       x,timingInfo[x].calls,(timingInfo[x].cycles/(double)timingInfo[x].calls),
  72       (double)timingInfo[x].mint,(double)timingInfo[x].maxt,
  73         (double)timingInfo[x].cycles
  74 #if defined(_WIN64) || !defined(_WIN32)
  75           / 1000000.0
  76 #else
  77         / (2.4*1000.0*1000.0*1000.0)
  78 #endif
  79
  80       );
  81 #ifdef _WIN32
  82       OutputDebugString(buf);
  83 #else
  84       printf("%s",buf);
  85 #endif
  86     }
  87         }
  88 #ifdef _WIN32
  89   if (!p) OutputDebugString("no calls to timing lib\n");
  90 #else
  91   if (!p) printf("no calls to timing lib\n");
  92 #endif
  93
  94         timingInit();
  95 }
  96
  97 #endif