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/*
** THIS SOFTWARE IS SUBJECT TO COPYRIGHT PROTECTION AND IS OFFERED ONLY
** PURSUANT TO THE 3DFX GLIDE GENERAL PUBLIC LICENSE. THERE IS NO RIGHT
** TO USE THE GLIDE TRADEMARK WITHOUT PRIOR WRITTEN PERMISSION OF 3DFX
** INTERACTIVE, INC. A COPY OF THIS LICENSE MAY BE OBTAINED FROM THE
** DISTRIBUTOR OR BY CONTACTING 3DFX INTERACTIVE INC(info@3dfx.com).
** THIS PROGRAM IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER
** EXPRESSED OR IMPLIED. SEE THE 3DFX GLIDE GENERAL PUBLIC LICENSE FOR A
** FULL TEXT OF THE NON-WARRANTY PROVISIONS.
**
** USE, DUPLICATION OR DISCLOSURE BY THE GOVERNMENT IS SUBJECT TO
** RESTRICTIONS AS SET FORTH IN SUBDIVISION (C)(1)(II) OF THE RIGHTS IN
** TECHNICAL DATA AND COMPUTER SOFTWARE CLAUSE AT DFARS 252.227-7013,
** AND/OR IN SIMILAR OR SUCCESSOR CLAUSES IN THE FAR, DOD OR NASA FAR
** SUPPLEMENT. UNPUBLISHED RIGHTS RESERVED UNDER THE COPYRIGHT LAWS OF
** THE UNITED STATES.
**
** COPYRIGHT 3DFX INTERACTIVE, INC. 1999, ALL RIGHTS RESERVED
*/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <3dfx.h>
#include <tsc.h>
static FxU32 tsc_histogram[TSC_MAX_CLOCKS];
FxU32 tsc_begin, tsc_end;
static FxU32 tsc_bias;
void
tscInit( void ) {
FxU32 test = 100;
int i;
for ( i = 0; i < 10; i++ )
{
tscBegin();
tsc_end = tscReadTSC();
if ( ( tsc_end - tsc_begin ) < test )
test = tsc_end - tsc_begin;
}
tsc_bias = test;
}
/*
** timing routines
*/
void tscStoreDelta( void )
{
FxU32 value = tsc_end - tsc_begin;
if ( value < TSC_MAX_CLOCKS && value > tsc_bias )
tsc_histogram[value-tsc_bias]++;
}
void tscPrintHistogram( void )
{
float total = 0.0F;
int i;
for ( i = 0; i < TSC_MAX_CLOCKS; i++ )
total += tsc_histogram[i];
for ( i = 0; i < TSC_MAX_CLOCKS; i++ )
{
float percent = ( tsc_histogram[i] * 100.0F ) / total;
if ( percent > 1.0 )
{
printf( "%04d: %3.2f\n", i, percent );
}
}
}
FxU32
tscGetMostFrequent(void) {
float total = 0.0F;
int i;
float
maxPercent = 0.f;
FxU32
mostFrequentClockCount;
for ( i = 0; i < TSC_MAX_CLOCKS; i++ )
total += tsc_histogram[i];
for ( i = 0; i < TSC_MAX_CLOCKS; i++ ) {
float percent = ( tsc_histogram[i] * 100.0F ) / total;
if ( percent > maxPercent ) {
maxPercent = percent;
mostFrequentClockCount = i;
}
}
return mostFrequentClockCount;
}
FxU32 *tscGetHistogram( void )
{
return tsc_histogram;
}
void tscResetHistogram(void)
{
int i;
for (i = 0; i < TSC_MAX_CLOCKS; i++)
tsc_histogram[i] = 0;
}
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