remove_events.c

Go to the documentation of this file.

/* This test checks if removing events works properly at the low level

   by Vince Weaver (vweaver1@eecs.utk.edu)

  */

#include "papi_test.h"

int
main( int argc, char **argv )
{
    int retval;
    int EventSet = PAPI_NULL;
    long long values1[2],values2[2];
    char *event_names[] = {"PAPI_TOT_CYC","PAPI_TOT_INS"};
    char add_event_str[PAPI_MAX_STR_LEN];
    double instructions_error;
    long long old_instructions;

    /* Set TESTS_QUIET variable */
    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 );
    }
        
    /* 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 );
    }

    /* 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, values1 );
    if ( retval != PAPI_OK ) {
       test_fail( __FILE__, __LINE__, "PAPI_stop", retval );
    }


    old_instructions=values1[1];
    
    if ( !TESTS_QUIET ) {

       printf( "========================\n" );

       /* cycles is first, other event second */
       sprintf( add_event_str, "%-12s : \t", event_names[0] );
       printf( TAB1, add_event_str, values1[0] );
       sprintf( add_event_str, "%-12s : \t", event_names[1] );
           printf( TAB1, add_event_str, values1[1] );
    }


    /* remove PAPI_TOT_CYC */
    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 );
    }
    

    /* 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, values2 );
    if ( retval != PAPI_OK ) {
       test_fail( __FILE__, __LINE__, "PAPI_stop", retval );
    }


    /* test if after removing the event, the second event */
    /* still points to the proper native event            */

    /* this only works if IPC != 1 */

    if ( !TESTS_QUIET ) {

       printf( "==========================\n" );
       printf( "After removing PAP_TOT_CYC\n");
       sprintf( add_event_str, "%-12s : \t", event_names[1] );
           printf( TAB1, add_event_str, values2[0] );

       instructions_error=((double)old_instructions - (double)values2[0])/
         (double)old_instructions;
       if (instructions_error>10.0) {
         printf("Error of %.2f%%\n",instructions_error);
         test_fail( __FILE__, __LINE__, "validation", 0 );
       }

    }
    test_pass( __FILE__, NULL, 0 );
    
    return 0;
}