case1.c

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/* From Dave McNamara at PSRV. Thanks! */
 
/* If you try to add an event that doesn't exist, you get the correct error
message, yet you get subsequent Seg. Faults when you try to do PAPI_start and
PAPI_stop. I would expect some bizarre behavior if I had no events added to the
event set and then tried to PAPI_start but if I had successfully added one
event, then the 2nd one get an error when I tried to add it, is it possible for
PAPI_start to work but just count the first event?
*/
 
#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 i, j = 0;
    long long g1[2];
 
    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_L2_TCM ) == PAPI_OK )
        j++;
 
    if ( j == 1 &&
         ( retval = PAPI_add_event( EventSet, PAPI_L2_TCM ) ) != PAPI_OK ) {
        if ( retval != PAPI_ECNFLCT )
            test_fail( __FILE__, __LINE__, "PAPI_add_event", retval );
        j--;                 /* The event was not added */
    }
 
    i = j;
    if ( PAPI_query_event( PAPI_L2_DCM ) == PAPI_OK )
        j++;
 
    if ( j == ( i + 1 ) &&
         ( retval = PAPI_add_event( EventSet, PAPI_L2_DCM ) ) != PAPI_OK ) {
        if ( retval != PAPI_ECNFLCT )
            test_fail( __FILE__, __LINE__, "PAPI_add_event", retval );
        j--;                 /* The event was not added */
    }
 
    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;
}