perf_event_uncore.c File Reference

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Defines
#define	MAX_CYCLE_ERROR   30
Functions
int	main (int argc, char **argv)
Variables
char	uncore_event [] = "snbep_unc_imc0::UNC_M_CLOCKTICKS"

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Define Documentation

#define MAX_CYCLE_ERROR   30

Definition at line 6 of file perf_event_uncore.c.

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Function Documentation

int main	(	int	argc,
		char **	argv
	)

Definition at line 11 of file perf_event_uncore.c.

{
    int retval;
    int EventSet = PAPI_NULL;
    long long values[1];
    const PAPI_hw_info_t *hwinfo;

    /* 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 );
    }

    hwinfo = PAPI_get_hardware_info();
    if ( hwinfo == NULL ) {
        test_fail(__FILE__, __LINE__, "PAPI_get_hardware_info failed, THIS should not happen.", PAPI_ESYS);
    }
    if ( hwinfo->vendor != PAPI_VENDOR_INTEL ) {
        test_skip( __FILE__, __LINE__, "This test is only for Intel Processors, for now.", PAPI_OK );
    }
    if (( hwinfo->cpuid_family != 6) || (hwinfo->cpuid_model != 45) ) {
        test_skip( __FILE__, __LINE__, "This test is only implemented for SandyBridge-EP series processors for now.", PAPI_OK );
    }

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

    /* we need to set a component for the EventSet */

    retval = PAPI_assign_eventset_component(EventSet, 0);

    /* we need to set to a certain cpu for uncore to work */

    PAPI_cpu_option_t cpu_opt;

    cpu_opt.eventset=EventSet;
    cpu_opt.cpu_num=0;

    retval = PAPI_set_opt(PAPI_CPU_ATTACH,(PAPI_option_t*)&cpu_opt);
    if (retval != PAPI_OK) {
       test_fail(__FILE__, __LINE__, "PAPI_CPU_ATTACH",retval);
    }

    /* we need to set the granularity to system-wide for uncore to work */

    PAPI_granularity_option_t gran_opt;
    
    gran_opt.def_cidx=0;
    gran_opt.eventset=EventSet;
    gran_opt.granularity=PAPI_GRN_SYS;

    retval = PAPI_set_opt(PAPI_GRANUL,(PAPI_option_t*)&gran_opt);
    if (retval != PAPI_OK) {
       test_fail(__FILE__, __LINE__, "PAPI_GRANUL",retval);
    }
    
    /* we need to set domain to be as inclusive as possible */
    
    PAPI_domain_option_t domain_opt;

    domain_opt.def_cidx=0;
    domain_opt.eventset=EventSet;
    domain_opt.domain=PAPI_DOM_ALL;

    retval = PAPI_set_opt(PAPI_DOMAIN,(PAPI_option_t*)&domain_opt);
    if (retval != PAPI_OK) {
       test_fail(__FILE__, __LINE__, "PAPI_DOMAIN",retval);
    }

    /* Add our uncore event */

    retval = PAPI_add_named_event(EventSet, uncore_event);

    if (retval != PAPI_OK) {
      test_fail(__FILE__, __LINE__, "Error with event \n",retval);
    }

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

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

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

    if ( !TESTS_QUIET ) {
       printf("Uncore test:\n");
       printf("\t%s: %lld\n",uncore_event,values[0]);
    }

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

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Variable Documentation

char uncore_event[] = "snbep_unc_imc0::UNC_M_CLOCKTICKS"

Definition at line 8 of file perf_event_uncore.c.