zero_named.c

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/* This test exercises the PAPI_{query, add, remove}_event APIs
   for PRESET events.
   It more or less duplicates the functionality of the classic "zero" test.
*/

#include <stdio.h>

#include "papi.h"
#include "papi_test.h"

#include "do_loops.h"

int
main( int argc, char **argv )
{
    int retval, num_tests = 1, tmp;
    int EventSet = PAPI_NULL;
    int num_events = 2;
    long long **values;
    long long elapsed_us, elapsed_cyc, elapsed_virt_us, elapsed_virt_cyc;
    const char *event_names[] = {"PAPI_TOT_CYC","PAPI_TOT_INS"};
    char add_event_str[PAPI_MAX_STR_LEN];
    double cycles_error;
    int quiet;

    /* Set TESTS_QUIET variable */
    quiet=tests_quiet( argc, argv );

    /* Init the PAPI library */
    retval = PAPI_library_init( PAPI_VER_CURRENT );
    if ( retval != PAPI_VER_CURRENT ) {
       test_fail( __FILE__, __LINE__, "PAPI_library_init", retval );
    }

    /* Verify that the named events exist */
    retval = PAPI_query_named_event(event_names[0]);
    if ( retval == PAPI_OK) {
        retval = PAPI_query_named_event(event_names[1]);
    }
    if ( retval != PAPI_OK ) {
        if (!quiet) printf("Trouble querying events\n");
        test_skip( __FILE__, __LINE__, "PAPI_query_named_event", retval );
    }

    /* Create an empty event set */
    retval = PAPI_create_eventset( &EventSet );
    if ( retval != PAPI_OK )
       test_fail( __FILE__, __LINE__, "PAPI_create_eventset", retval );

    /* add the events named above */
    retval = PAPI_add_named_event( EventSet, event_names[0] );
    if ( retval != PAPI_OK ) {
        sprintf( add_event_str, "PAPI_add_named_event[%s]", event_names[0] );
        test_fail( __FILE__, __LINE__, add_event_str, retval );
    }

    retval = PAPI_add_named_event( EventSet, event_names[1] );
    if ( retval != PAPI_OK ) {
        sprintf( add_event_str, "PAPI_add_named_event[%s]", event_names[1] );
        test_fail( __FILE__, __LINE__, add_event_str, retval );
    }

    values = allocate_test_space( num_tests, num_events );

    /* Gather before stats */
    elapsed_us = PAPI_get_real_usec(  );
    elapsed_cyc = PAPI_get_real_cyc(  );
    elapsed_virt_us = PAPI_get_virt_usec(  );
    elapsed_virt_cyc = PAPI_get_virt_cyc(  );

    /* Start PAPI */
    retval = PAPI_start( EventSet );
    if ( retval != PAPI_OK ) {
       test_fail( __FILE__, __LINE__, "PAPI_start", retval );
    }

    /* our test code */
    do_flops( NUM_FLOPS );

    /* Stop PAPI */
    retval = PAPI_stop( EventSet, values[0] );
    if ( retval != PAPI_OK ) {
       test_fail( __FILE__, __LINE__, "PAPI_stop", retval );
    }

    /* Calculate total values */
    elapsed_virt_us = PAPI_get_virt_usec(  ) - elapsed_virt_us;
    elapsed_virt_cyc = PAPI_get_virt_cyc(  ) - elapsed_virt_cyc;
    elapsed_us = PAPI_get_real_usec(  ) - elapsed_us;
    elapsed_cyc = PAPI_get_real_cyc(  ) - elapsed_cyc;

    /* remove PAPI_TOT_CYC and PAPI_TOT_INS */
    retval = PAPI_remove_named_event( EventSet, event_names[0] );
    if ( retval != PAPI_OK ) {
        sprintf( add_event_str, "PAPI_add_named_event[%s]", event_names[0] );
        test_fail( __FILE__, __LINE__, add_event_str, retval );
    }

    retval = PAPI_remove_named_event( EventSet, event_names[1] );
    if ( retval != PAPI_OK ) {
        sprintf( add_event_str, "PAPI_add_named_event[%s]", event_names[1] );
        test_fail( __FILE__, __LINE__, add_event_str, retval );
    }

    if ( !quiet ) {
       printf( "PAPI_{query, add, remove}_named_event API test.\n" );
       printf( "-----------------------------------------------\n" );
       tmp = PAPI_get_opt( PAPI_DEFDOM, NULL );
       printf( "Default domain is: %d (%s)\n", tmp,
                stringify_all_domains( tmp ) );
       tmp = PAPI_get_opt( PAPI_DEFGRN, NULL );
       printf( "Default granularity is: %d (%s)\n", tmp,
                stringify_granularity( tmp ) );
       printf( "Using %d iterations of c += a*b\n", NUM_FLOPS );
       printf( "-------------------------------------------------------------------------\n" );

       printf( "Test type    : \t            1\n" );

       /* cycles is first, other event second */
       sprintf( add_event_str, "%-12s : \t", event_names[0] );
       printf( TAB1, add_event_str, values[0][0] );
       sprintf( add_event_str, "%-12s : \t", event_names[1] );
       printf( TAB1, add_event_str, values[0][1] );

       printf( TAB1, "Real usec    : \t", elapsed_us );
       printf( TAB1, "Real cycles  : \t", elapsed_cyc );
       printf( TAB1, "Virt usec    : \t", elapsed_virt_us );
       printf( TAB1, "Virt cycles  : \t", elapsed_virt_cyc );

       printf( "-------------------------------------------------------------------------\n" );

       printf( "Verification: PAPI_TOT_CYC should be roughly real_cycles\n" );
       cycles_error=100.0*((double)values[0][0] - (double)elapsed_cyc)/
         (double)values[0][0];
       if (cycles_error>10.0) {
         printf("Error of %.2f%%\n",cycles_error);
         test_fail( __FILE__, __LINE__, "validation", 0 );
       }

    }
    test_pass( __FILE__ );

    return 0;
}