perf_event_uncore_cbox.c File Reference

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Defines
#define	EVENTS_TO_TRY   16
#define	MAX_PACKAGES   4
Functions
int	main (int argc, char **argv)

---

Define Documentation

#define EVENTS_TO_TRY   16

Definition at line 9 of file perf_event_uncore_cbox.c.

#define MAX_PACKAGES   4

Definition at line 10 of file perf_event_uncore_cbox.c.

---

Function Documentation

int main	(	int	argc,
		char **	argv
	)

Definition at line 12 of file perf_event_uncore_cbox.c.

                                  {

   int retval,i,j;
   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;

   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 );
   }

   /* Find the uncore PMU */
   uncore_cidx=PAPI_get_component_index("perf_event_uncore");
   if (uncore_cidx<0) {
      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) {

      if ( hwinfo->cpuid_family == 6) {
         switch(hwinfo->cpuid_model) {
           case 45: /* SandyBridge EP */
                    strncpy(event_name,"UNC_C_TOR_OCCUPANCY:ALL",BUFSIZ);
                    strncpy(uncore_base,"snbep_unc_cbo",BUFSIZ);
                    break;
           case 58: /* IvyBridge */
                    strncpy(event_name,"UNC_CBO_CACHE_LOOKUP:STATE_I:ANY_FILTER",BUFSIZ);
                    strncpy(uncore_base,"ivb_unc_cbo",BUFSIZ);
                    break;
           default:
                    test_skip( __FILE__, __LINE__,
                "We only support IVB and SNB-EP for now", PAPI_ENOSUPP );
        }
      }
      else {
          test_skip( __FILE__, __LINE__,
                "We only support IVB and SNB-EP for now", PAPI_ENOSUPP );
      }
   }
   else {
      test_skip( __FILE__, __LINE__,
                "This test only supported Intel chips", PAPI_ENOSUPP );

   }

   if (!TESTS_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 (!TESTS_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) {
            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 */
     sprintf(uncore_event,"%s%d::%s",uncore_base,j,event_name);
         retval = PAPI_add_named_event(EventSet[j][i], uncore_event);
         if (retval != PAPI_OK) {
            max_cbox=j;
        break;
         }
     if (!TESTS_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 (!TESTS_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 ) {
        printf("Error stopping socket %d cbox %d\n",i,j);
            test_fail( __FILE__, __LINE__, "PAPI_stop", retval );
         }
     }
   }

   /* Print Results */
   if ( !TESTS_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__, NULL, 0 );


   return 0;
}

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