case2.c

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/* From Dave McNamara at PSRV. Thanks! */

/* If an event is countable but you've exhausted the counter resources
and you try to add an event, it seems subsequent PAPI_start and/or
PAPI_stop will causes a Seg. Violation.

   I got around this by calling PAPI to get the # of countable events,
then making sure that I didn't try to add more than these number of
events. I still have a problem if someone adds Level 2 cache misses
and then adds FLOPS 'cause I didn't count FLOPS as actually requiring
2 counters. */

#include <stdio.h>
#include <stdlib.h>

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

int
main( int argc, char **argv )
{
    double c, a = 0.999, b = 1.001;
    int n = 1000;
    int EventSet = PAPI_NULL;
    int retval;
    int j = 0, i;
    long long g1[3];

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

    if ( ( retval =
           PAPI_library_init( PAPI_VER_CURRENT ) ) != PAPI_VER_CURRENT )
        test_fail( __FILE__, __LINE__, "PAPI_library_init", retval );

    if ( ( retval = PAPI_create_eventset( &EventSet ) ) != PAPI_OK )
        test_fail( __FILE__, __LINE__, "PAPI_create_eventset", retval );

    if ( PAPI_query_event( PAPI_BR_CN ) == PAPI_OK )
        j++;

    if ( j == 1 &&
         ( retval = PAPI_add_event( EventSet, PAPI_BR_CN ) ) != PAPI_OK ) {
        if ( retval != PAPI_ECNFLCT )
            test_fail( __FILE__, __LINE__, "PAPI_add_event", retval );
    }

    i = j;
    if ( PAPI_query_event( PAPI_TOT_CYC ) == PAPI_OK )
        j++;

    if ( j == ( i + 1 ) &&
         ( retval = PAPI_add_event( EventSet, PAPI_TOT_CYC ) ) != PAPI_OK ) {
        if ( retval != PAPI_ECNFLCT )
            test_fail( __FILE__, __LINE__, "PAPI_add_event", retval );
    }

    i = j;
    if ( PAPI_query_event( PAPI_TOT_INS ) == PAPI_OK )
        j++;

    if ( j == ( i + 1 ) &&
         ( retval = PAPI_add_event( EventSet, PAPI_TOT_INS ) ) != PAPI_OK ) {
        if ( retval != PAPI_ECNFLCT )
            test_fail( __FILE__, __LINE__, "PAPI_add_event", retval );
    }

    if ( j ) {
        if ( ( retval = PAPI_start( EventSet ) ) != PAPI_OK )
            test_fail( __FILE__, __LINE__, "PAPI_start", retval );

        for ( i = 0; i < n; i++ ) {
            c = a * b;
        }
        if (!TESTS_QUIET) fprintf(stdout,"c=%lf\n",c);
        if ( ( retval = PAPI_stop( EventSet, g1 ) ) != PAPI_OK )
            test_fail( __FILE__, __LINE__, "PAPI_stop", retval );
    }

    test_pass( __FILE__ );

    return 0;
}