perf_event_uncore_cbox.c File Reference

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Macros
#define	EVENTS_TO_TRY   16
#define	MAX_PACKAGES   4

Functions
int	main (int argc, char **argv)

Macro Definition Documentation

EVENTS_TO_TRY

#define EVENTS_TO_TRY   16

Definition at line 15 of file perf_event_uncore_cbox.c.

MAX_PACKAGES

#define MAX_PACKAGES   4

Definition at line 16 of file perf_event_uncore_cbox.c.

Function Documentation

main()

int main	(	int	argc,
		char **	argv
	)

Definition at line 18 of file perf_event_uncore_cbox.c.

                                  {
 
    int retval,i,j,quiet;
    int EventSet[EVENTS_TO_TRY][MAX_PACKAGES];
    long long values[EVENTS_TO_TRY][MAX_PACKAGES];
    char event_name[BUFSIZ];
    char uncore_base[BUFSIZ];
    char uncore_event[BUFSIZ];
    int uncore_cidx=-1;
    int max_cbox=0;
    int core_to_use=0;
    char *result;
 
    const PAPI_hw_info_t *hwinfo;
 
    /* 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 );
    }
 
    /* Find the uncore PMU */
    uncore_cidx=PAPI_get_component_index("perf_event_uncore");
    if (uncore_cidx<0) {
        if (!quiet) {
            printf("perf_event_uncore component not found\n");
        }
        test_skip(__FILE__,__LINE__,"perf_event_uncore component not found",0);
    }
 
    /* Get hardware info */
    hwinfo = PAPI_get_hardware_info();
    if ( hwinfo == NULL ) {
        test_fail(__FILE__,__LINE__,"PAPI_get_hardware_info()",retval);
    }
 
    /* Get event to use */
    if (hwinfo->vendor == PAPI_VENDOR_INTEL) {
        result=get_uncore_cbox_event(event_name,uncore_base,BUFSIZ);
 
        if (result==NULL) {
            if (!quiet) {
                printf("No event available\n");
            }
            test_skip( __FILE__, __LINE__,
                "No event available", PAPI_ENOSUPP );
        }
    }
    else {
        if (!quiet) {
            printf("We only support Intel for now\n");
        }
        test_skip( __FILE__, __LINE__,
            "This test only supported Intel chips", PAPI_ENOSUPP );
    }
 
    if (!quiet) {
        printf("Trying for %d sockets\n",hwinfo->sockets);
        printf("threads %d cores %d ncpus %d\n", hwinfo->threads,hwinfo->cores,
            hwinfo->ncpu);
    }
 
    for(i=0;i < hwinfo->sockets; i++) {
 
        /* perf_event provides which to use in "cpumask"    */
        /* but libpfm4 doesn't report this back to us (yet) */
        core_to_use=i*hwinfo->threads*hwinfo->cores;
        if (!quiet) {
            printf("Using core %d for socket %d\n",core_to_use,i);
        }
 
        for(j=0;j<EVENTS_TO_TRY;j++) {
 
            /* Create an eventset */
            EventSet[j][i]=PAPI_NULL;
            retval = PAPI_create_eventset(&EventSet[j][i]);
            if (retval != PAPI_OK) {
                test_fail(__FILE__, __LINE__, "PAPI_create_eventset",retval);
            }
 
            /* Set a component for the EventSet */
            retval = PAPI_assign_eventset_component(EventSet[j][i], uncore_cidx);
            if (retval!=PAPI_OK) {
                test_fail(__FILE__, __LINE__, "PAPI_assign_eventset_component",retval);
            }
 
            /* we need to set to a certain cpu for uncore to work */
 
            PAPI_cpu_option_t cpu_opt;
 
            cpu_opt.eventset=EventSet[j][i];
            cpu_opt.cpu_num=core_to_use;
 
            retval = PAPI_set_opt(PAPI_CPU_ATTACH,(PAPI_option_t*)&cpu_opt);
            if (retval != PAPI_OK) {
                if (!quiet) {
                    printf("Problem with PAPI_CPU_ATTACH\n");
                }
                test_skip( __FILE__, __LINE__,
                    "this test; trying to PAPI_CPU_ATTACH; need to run as root",
                    retval);
            }
 
            /* Default Granularity should work */
 
            /* Default domain should work */
 
            /* Add our uncore event */
            retval = snprintf(uncore_event, BUFSIZ, "%s%d::%s",uncore_base,j,event_name);
            if( retval >= BUFSIZ ){
                fprintf(stderr,"Event full name \"%s%d::%s\" has been truncated to \"%s\"\n",uncore_base,j,event_name, uncore_event);
            }
            retval = PAPI_add_named_event(EventSet[j][i], uncore_event);
            if (retval != PAPI_OK) {
                max_cbox=j;
                break;
            }
            if (!quiet) {
                printf("Added %s for socket %d\n",uncore_event,i);
            }
 
        }
    }
 
    for(i=0;i < hwinfo->sockets; i++) {
 
        for(j=0;j<max_cbox;j++) {
            if (!quiet) {
                printf("Starting EventSet %d\n",EventSet[j][i]);
            }
 
            /* Start PAPI */
            retval = PAPI_start( EventSet[j][i] );
            if ( retval != PAPI_OK ) {
                printf("Error starting socket %d cbox %d\n",i,j);
                test_fail( __FILE__, __LINE__, "PAPI_start", retval );
            }
        }
    }
 
    /* our work code */
    do_flops( NUM_FLOPS );
 
    /* Stop PAPI */
    for(i=0;i < hwinfo->sockets; i++) {
        for(j=0;j<max_cbox;j++) {
            retval = PAPI_stop( EventSet[j][i],&values[j][i] );
            if ( retval != PAPI_OK ) {
                if (!quiet) {
                    printf("Error stopping socket %d cbox %d\n",i,j);
                }
                test_fail( __FILE__, __LINE__, "PAPI_stop", retval );
            }
        }
    }
 
    /* Print Results */
    if ( !quiet ) {
        for(i=0;i < hwinfo->sockets; i++) {
            printf("Socket %d\n",i);
            for(j=0;j<max_cbox;j++) {
                printf("\t%s%d::%s %lld\n",uncore_base,j,event_name,values[j][i]);
            }
        }
    }
 
    PAPI_shutdown();
 
    test_pass( __FILE__ );
 
    return 0;
}

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