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/*
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* Test example for multiplex functionality, originally
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* provided by Timothy Kaiser, SDSC. It was modified to fit the
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* PAPI test suite by Nils Smeds, <smeds@pdc.kth.se>.
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*
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* This example verifies the accuracy of multiplexed events
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <math.h>
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#include "papi.h"
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#include "papi_test.h"
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#include "testcode.h"
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#define REPEATS 5
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#define MAXEVENTS 14
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#define SLEEPTIME 100
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#define MINCOUNTS 100000
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#define MPX_TOLERANCE 0.20
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#define NUM_FLOPS 20000000
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void
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check_values( int eventset, int *events, int nevents, long long *values,
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long long *refvalues )
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{
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double spread[MAXEVENTS];
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int i = nevents, j = 0;
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if ( !TESTS_QUIET ) {
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printf( "\nRelative accuracy:\n" );
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for ( j = 0; j < nevents; j++ )
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printf( " Event %.2d", j + 1 );
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printf( "\n" );
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}
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for ( j = 0; j < nevents; j++ ) {
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spread[j] = abs( (int) ( refvalues[j] - values[j] ) );
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if ( values[j] )
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spread[j] /= ( double ) values[j];
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if ( !TESTS_QUIET )
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printf( "%10.3g ", spread[j] );
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/* Make sure that NaN get counted as errors */
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if ( spread[j] < MPX_TOLERANCE ) {
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i--;
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}
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else if ( refvalues[j] < MINCOUNTS ) { /* Neglect inprecise results with low counts */
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i--;
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}
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else {
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char buff[BUFSIZ];
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if (!TESTS_QUIET) {
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printf("reference = %lld, value = %lld, diff = %lld\n",
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refvalues[j],values[j],refvalues[j] - values[j] );
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}
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sprintf(buff,"Error on %d, spread %lf > threshold %lf AND count %lld > minimum size threshold %d\n",j,spread[j],MPX_TOLERANCE,
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refvalues[j],MINCOUNTS);
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test_fail( __FILE__, __LINE__, buff, 1 );
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}
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}
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if (!TESTS_QUIET) printf( "\n\n" );
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#if 0
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if ( !TESTS_QUIET ) {
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for ( j = 0; j < nevents; j++ ) {
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PAPI_get_event_info( events[j], &info );
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printf( "Event %.2d: ref=", j );
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printf( LLDFMT10, refvalues[j] );
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printf( ", diff/ref=%7.2g -- %s\n", spread[j], info.short_descr );
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printf( "\n" );
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}
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printf( "\n" );
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}
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#else
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( void ) eventset;
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( void ) events;
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#endif
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}
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void
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ref_measurements( int iters, int *eventset, int *events, int nevents,
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long long *refvalues )
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{
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PAPI_event_info_t info;
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int i, retval;
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double x = 1.1, y;
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long long t1, t2;
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if (!TESTS_QUIET) printf( "PAPI reference measurements:\n" );
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if ( ( retval = PAPI_create_eventset( eventset ) ) )
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test_fail( __FILE__, __LINE__, "PAPI_create_eventset", retval );
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for ( i = 0; i < nevents; i++ ) {
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if ( ( retval = PAPI_add_event( *eventset, events[i] ) ) )
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test_fail( __FILE__, __LINE__, "PAPI_add_event", retval );
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x = 1.0;
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t1 = PAPI_get_real_usec( );
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if ( ( retval = PAPI_start( *eventset ) ) )
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test_fail( __FILE__, __LINE__, "PAPI_start", retval );
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y = do_flops3( x, iters, 1 );
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if ( ( retval = PAPI_stop( *eventset, &refvalues[i] ) ) )
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test_fail( __FILE__, __LINE__, "PAPI_stop", retval );
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t2 = PAPI_get_real_usec( );
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if (!TESTS_QUIET) {
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printf( "\tOperations= %.1f Mflop", y * 1e-6 );
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printf( "\t(%g Mflop/s)\n\n", ( ( float ) y / ( t2 - t1 ) ) );
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}
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PAPI_get_event_info( events[i], &info );
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if (!TESTS_QUIET) {
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printf( "%20s = ", info.short_descr );
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printf( LLDFMT, refvalues[i] );
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printf( "\n" );
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}
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if ( ( retval = PAPI_cleanup_eventset( *eventset ) ) )
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test_fail( __FILE__, __LINE__, "PAPI_cleanup_eventset", retval );
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}
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if ( ( retval = PAPI_destroy_eventset( eventset ) ) )
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test_fail( __FILE__, __LINE__, "PAPI_destroy_eventset", retval );
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*eventset = PAPI_NULL;
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}
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int
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main( int argc, char **argv )
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{
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PAPI_event_info_t info;
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int i, j, retval;
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int iters = NUM_FLOPS;
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double x = 1.1, y;
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long long t1, t2;
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long long values[MAXEVENTS], refvalues[MAXEVENTS];
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int sleep_time = SLEEPTIME;
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int nevents = MAXEVENTS;
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int eventset = PAPI_NULL;
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int events[MAXEVENTS];
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int quiet;
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quiet = tests_quiet( argc, argv );
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if ( argc > 1 ) {
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if ( !strcmp( argv[1], "TESTS_QUIET" ) ) {
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}
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else {
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sleep_time = atoi( argv[1] );
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if ( sleep_time <= 0 )
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sleep_time = SLEEPTIME;
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}
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}
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events[0] = PAPI_FP_INS;
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events[1] = PAPI_TOT_INS;
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events[2] = PAPI_INT_INS;
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events[3] = PAPI_TOT_CYC;
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events[4] = PAPI_STL_CCY;
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events[5] = PAPI_BR_INS;
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events[6] = PAPI_SR_INS;
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events[7] = PAPI_LD_INS;
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events[8] = PAPI_TOT_IIS;
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events[9] = PAPI_FAD_INS;
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events[10] = PAPI_BR_TKN;
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events[11] = PAPI_BR_MSP;
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events[12] = PAPI_L1_ICA;
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events[13] = PAPI_L1_DCA;
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for ( i = 0; i < MAXEVENTS; i++ ) {
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values[i] = 0;
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}
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if ( !quiet ) {
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printf( "\nAccuracy check of multiplexing routines.\n" );
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printf( "Comparing a multiplex measurement with separate measurements.\n\n" );
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}
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/* Initialize PAPI */
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retval = PAPI_library_init( PAPI_VER_CURRENT );
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if (retval != PAPI_VER_CURRENT ) {
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test_fail( __FILE__, __LINE__, "PAPI_library_init", retval );
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}
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/* Iterate through event list and remove those that aren't suitable */
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nevents = MAXEVENTS;
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for ( i = 0; i < nevents; i++ ) {
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if (( PAPI_get_event_info( events[i], &info ) == PAPI_OK ) &&
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(info.count && (strcmp( info.derived, "NOT_DERIVED")==0))) {
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if (!quiet) printf( "Added %s\n", info.symbol );
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}
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else {
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for ( j = i; j < MAXEVENTS-1; j++ ) {
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events[j] = events[j + 1];
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}
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nevents--;
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i--;
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}
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}
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/* Skip test if not enough events available */
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if ( nevents < 2 ) {
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test_skip( __FILE__, __LINE__, "Not enough events to multiplex...", 0 );
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}
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if (!quiet) printf( "Using %d events\n\n", nevents );
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retval = PAPI_multiplex_init( );
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if ( retval != PAPI_OK ) {
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test_fail( __FILE__, __LINE__,
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"PAPI multiplex init fail\n", retval );
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}
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/* Find a reasonable number of iterations (each
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* event active 20 times) during the measurement
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*/
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/* Target: 10000 usec/multiplex, 20 repeats */
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t2 = 10000 * 20 * nevents;
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if ( t2 > 30e6 ) {
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test_skip( __FILE__, __LINE__, "This test takes too much time",
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retval );
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}
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/* Warmup? */
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y = do_flops3( x, iters, 1 );
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/* Measure time of one run */
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t1 = PAPI_get_real_usec( );
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y = do_flops3( x, iters, 1 );
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t1 = PAPI_get_real_usec( ) - t1;
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if (t1==0) {
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test_fail(__FILE__, __LINE__,
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"do_flops3 takes no time to run!\n", retval);
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}
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/* Scale up execution time to match t2 */
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if ( t2 > t1 ) {
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iters = iters * ( int ) ( t2 / t1 );
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if (!quiet) {
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printf( "Modified iteration count to %d\n\n", iters );
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}
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}
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if (!quiet) fprintf(stdout,"y=%lf\n",y);
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/* Now loop through the items one at a time */
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ref_measurements( iters, &eventset, events, nevents, refvalues );
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/* Now check multiplexed */
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if ( ( retval = PAPI_create_eventset( &eventset ) ) )
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test_fail( __FILE__, __LINE__, "PAPI_create_eventset", retval );
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/* In Component PAPI, EventSets must be assigned a component index
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before you can fiddle with their internals.
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0 is always the cpu component */
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retval = PAPI_assign_eventset_component( eventset, 0 );
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if ( retval != PAPI_OK )
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test_fail( __FILE__, __LINE__, "PAPI_assign_eventset_component",
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retval );
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if ( ( retval = PAPI_set_multiplex( eventset ) ) ) {
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if ( retval == PAPI_ENOSUPP) {
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test_skip(__FILE__, __LINE__, "Multiplex not supported", 1);
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}
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test_fail( __FILE__, __LINE__, "PAPI_set_multiplex", retval );
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}
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if ( ( retval = PAPI_add_events( eventset, events, nevents ) ) )
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test_fail( __FILE__, __LINE__, "PAPI_add_events", retval );
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if (!quiet) printf( "\nPAPI multiplexed measurements:\n" );
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x = 1.0;
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t1 = PAPI_get_real_usec( );
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if ( ( retval = PAPI_start( eventset ) ) )
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test_fail( __FILE__, __LINE__, "PAPI_start", retval );
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y = do_flops3( x, iters, 1 );
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if ( ( retval = PAPI_stop( eventset, values ) ) )
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test_fail( __FILE__, __LINE__, "PAPI_stop", retval );
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t2 = PAPI_get_real_usec( );
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for ( j = 0; j < nevents; j++ ) {
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PAPI_get_event_info( events[j], &info );
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if ( !quiet ) {
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577717 |
printf( "%20s = ", info.short_descr );
|
|
Packit |
577717 |
printf( LLDFMT, values[j] );
|
|
Packit |
577717 |
printf( "\n" );
|
|
Packit |
577717 |
}
|
|
Packit |
577717 |
}
|
|
Packit |
577717 |
|
|
Packit |
577717 |
check_values( eventset, events, nevents, values, refvalues );
|
|
Packit |
577717 |
|
|
Packit |
577717 |
if ( ( retval = PAPI_remove_events( eventset, events, nevents ) ) )
|
|
Packit |
577717 |
test_fail( __FILE__, __LINE__, "PAPI_remove_events", retval );
|
|
Packit |
577717 |
if ( ( retval = PAPI_cleanup_eventset( eventset ) ) )
|
|
Packit |
577717 |
test_fail( __FILE__, __LINE__, "PAPI_cleanup_eventset", retval );
|
|
Packit |
577717 |
if ( ( retval = PAPI_destroy_eventset( &eventset ) ) )
|
|
Packit |
577717 |
test_fail( __FILE__, __LINE__, "PAPI_destroy_eventset", retval );
|
|
Packit |
577717 |
eventset = PAPI_NULL;
|
|
Packit |
577717 |
|
|
Packit |
577717 |
/* Now loop through the items one at a time */
|
|
Packit |
577717 |
|
|
Packit |
577717 |
ref_measurements( iters, &eventset, events, nevents, refvalues );
|
|
Packit |
577717 |
|
|
Packit |
577717 |
check_values( eventset, events, nevents, values, refvalues );
|
|
Packit |
577717 |
|
|
Packit |
577717 |
test_pass( __FILE__ );
|
|
Packit |
577717 |
|
|
Packit |
577717 |
return 0;
|
|
Packit |
577717 |
}
|
|
Packit |
577717 |
|
|
Packit |
577717 |
|