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 UNPUBLISHED RIGHTS RESERVED UNDER THE COPYRIGHT LAWS OF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