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statistics for multiple timedemo runs (avg, std deviation, min, max)

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Bill Currie 2001-11-12 07:27:44 +00:00
parent e71a788509
commit 35ae176c4a
1 changed files with 48 additions and 2 deletions
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50
qw/source/cl_demo.c
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@ -56,14 +56,23 @@ static const char rcsid[] =
#include "host.h"
#include "pmove.h"
typedef struct {
int frames;
double time;
double fps;
} td_stats_t;
int cl_timeframes_isactive;
int cl_timeframes_index;
int demotime_cached;
char demoname[1024];
int timedemo_count;
double *cl_timeframes_array;
#define CL_TIMEFRAMES_ARRAYBLOCK 4096
int timedemo_count;
int timedemo_runs;
td_stats_t *timedemo_data;
void CL_FinishTimeDemo (void);
void CL_TimeFrames_Reset (void);
@ -785,6 +794,12 @@ CL_StartTimeDemo (void)
cl_timeframes_isactive = 1;
}
static inline double
sqr (double x)
{
return x * x;
}
void
CL_FinishTimeDemo (void)
{
@ -803,8 +818,37 @@ CL_FinishTimeDemo (void)
CL_TimeFrames_DumpLog();
cl_timeframes_isactive = 0;
if (--timedemo_count > 0)
timedemo_count--;
timedemo_data[timedemo_count].frames = time;
timedemo_data[timedemo_count].time = time;
timedemo_data[timedemo_count].fps = frames / time;
if (timedemo_count > 0) {
CL_StartTimeDemo ();
} else {
if (--timedemo_runs) {
double average = 0;
double variance = 0;
double min, max;
int i;
min = max = timedemo_data[0].fps;
for (i = 0; i < timedemo_runs; i++) {
average += timedemo_data[i].fps;
min = min (min, timedemo_data[i].fps);
max = max (max, timedemo_data[i].fps);
}
average /= timedemo_runs;
for (i = 0; i < timedemo_runs; i++)
variance += sqr (timedemo_data[i].fps - average);
variance /= timedemo_runs;
Con_Printf ("timedemo stats for %d runs:\n", timedemo_runs);
Con_Printf (" average fps: %.3f\n", average);
Con_Printf (" min/max fps: %.3f/%.3f\n", min, max);
Con_Printf ("std deviation: %.3f\n", sqrt (variance));
}
free (timedemo_data);
}
}
/*
@ -824,6 +868,8 @@ CL_TimeDemo_f (void)
} else {
timedemo_count = 1;
}
timedemo_runs = timedemo_count;
timedemo_data = calloc (timedemo_runs, sizeof (td_stats_t));
strncpy (demoname, Cmd_Argv (1), sizeof (demoname));
CL_StartTimeDemo ();
}