rapl_overflow.c

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#include <stdio.h>
#include "papi.h"
#include "papi_test.h"

static int total = 0;                  /* total overflows */

static long long values[2];
static long long rapl_values[2];
static long long old_rapl_values[2] = {0,0};
static int rapl_backward=0;

int EventSet2=PAPI_NULL;

int quiet=0;

void handler( int EventSet, void *address, 
          long long overflow_vector, void *context ) {

    ( void ) context;
    ( void ) address;
    ( void ) overflow_vector;

#if 0
    fprintf( stderr, "handler(%d ) Overflow at %p! bit=0x%llx \n",
                         EventSet, address, overflow_vector );
#endif
    
    PAPI_read(EventSet,values);
    if (!quiet) printf("%lld %lld\t",values[0],values[1]);
    PAPI_read(EventSet2,rapl_values);
    if (!quiet) printf("RAPL: %lld %lld\n",rapl_values[0],rapl_values[1]);

    if ((rapl_values[0]<old_rapl_values[0]) ||
        (rapl_values[1]<old_rapl_values[1])) {
       if (!quiet) printf("RAPL decreased!\n");
       rapl_backward=1;
    }
    old_rapl_values[0]=rapl_values[0];
    old_rapl_values[1]=rapl_values[1];


    total++;
}


void do_ints(int n,int quiet)
{
  int i,c=n;

  for(i=0;i<n;i++) {
     c+=c*i*n;
  }
  if (!quiet) printf("%d\n",c);
}



int
main( int argc, char **argv )
{
    int EventSet = PAPI_NULL;
    long long values0[2],values1[2],values2[2];
    int num_flops = 3000000, retval;
    int mythreshold = 1000000;
    char event_name1[PAPI_MAX_STR_LEN];
        int PAPI_event;
    int cid,numcmp,rapl_cid;
    const PAPI_component_info_t *cmpinfo = NULL;
    int i;

    /* Set TESTS_QUIET variable */
    tests_quiet( argc, argv );      

    quiet=TESTS_QUIET;

    /* Init PAPI */
    retval = PAPI_library_init( PAPI_VER_CURRENT );
    if ( retval != PAPI_VER_CURRENT ) {
      test_fail(__FILE__, __LINE__,"PAPI_library_init",retval);
    }

    numcmp = PAPI_num_components();

    for(cid=0; cid<numcmp; cid++) {

      if ( (cmpinfo = PAPI_get_component_info(cid)) == NULL) {
        test_fail(__FILE__, __LINE__,"PAPI_get_component_info failed\n", 0);
      }

      if (strstr(cmpinfo->name,"rapl")) {
        rapl_cid=cid;
        if (!TESTS_QUIET) printf("Found rapl component at cid %d\n",
                     rapl_cid);
        if (cmpinfo->num_native_events==0) {
              test_skip(__FILE__,__LINE__,"No rapl events found",0);
        }
        break;
      }
    }

    /* Component not found */
    if (cid==numcmp) {
      test_skip(__FILE__,__LINE__,"No rapl component found\n",0);
    }


    /* add PAPI_TOT_CYC and PAPI_TOT_INS */
    retval=PAPI_create_eventset(&EventSet);
    if ( retval != PAPI_OK ) {
       test_fail(__FILE__, __LINE__,"PAPI_create_eventset",retval);
    }

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

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

    /* Add some RAPL events */
    retval=PAPI_create_eventset(&EventSet2);
    if ( retval != PAPI_OK ) {
       test_fail(__FILE__, __LINE__,"PAPI_create_eventset",retval);
    }

    /* Add an event for each packages 0-n  */
    i = 0;
    do {
        char buffer[80];
        sprintf(&(buffer[0]), "rapl:::PACKAGE_ENERGY:PACKAGE%d", i);
        retval=PAPI_add_named_event(EventSet2,buffer);
        ++i;
    /* protect against insane PAPI library, the value 64 is the same value as 
     * RAPL_MAX_COUNTERS in linux-rapl.c, and feels reasonable. */
    } while ( 0 < retval && i < 64 );

    PAPI_event=PAPI_TOT_CYC;

    /* arbitrary */
    mythreshold = 2000000;
    if (!TESTS_QUIET) {
       printf("Using %#x for the overflow event, threshold %d\n",
          PAPI_event,mythreshold);
    }

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

    do_ints(num_flops,TESTS_QUIET);
    do_flops( 3000000 );

    /* stop the calibration run */
    retval = PAPI_stop( EventSet, values0 );
    if ( retval != PAPI_OK ) {
       test_fail(__FILE__, __LINE__,"PAPI_stop",retval);
    }


    /* set up overflow handler */
    retval = PAPI_overflow( EventSet,PAPI_event,mythreshold, 0, handler );
    if ( retval != PAPI_OK ) {
       test_fail(__FILE__, __LINE__,"PAPI_overflow",retval);
    }

    /* Start overflow run */
    retval = PAPI_start( EventSet );
    if ( retval != PAPI_OK ) {
       test_fail(__FILE__, __LINE__,"PAPI_start",retval);
    }
    retval = PAPI_start( EventSet2 );
    if ( retval != PAPI_OK ) {
       test_fail(__FILE__, __LINE__,"PAPI_start",retval);
    }

    do_ints(num_flops,TESTS_QUIET);
    do_flops( num_flops );

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

    retval = PAPI_stop( EventSet2, values2 );
    if ( retval != PAPI_OK ) {
       test_fail(__FILE__, __LINE__,"PAPI_stop",retval);
    }

    retval = PAPI_overflow( EventSet, PAPI_event, 0, 0, handler );
    if ( retval != PAPI_OK ) {
       test_fail(__FILE__, __LINE__,"PAPI_overflow",retval);
    }

    retval = PAPI_event_code_to_name( PAPI_event, event_name1 );
    if (retval != PAPI_OK) {
       test_fail(__FILE__, __LINE__,"PAPI_event_code_to_name\n", retval);
    }

    if (!TESTS_QUIET) {
       printf("%s: %lld %lld\n",event_name1,values0[0],values1[0]);
    }

    retval = PAPI_event_code_to_name( PAPI_TOT_INS, event_name1 );
    if (retval != PAPI_OK) {
      test_fail(__FILE__, __LINE__,"PAPI_event_code_to_name\n",retval);
    }

    if (!TESTS_QUIET) {
       printf("%s: %lld %lld\n",event_name1,values0[1],values1[1]);
    }

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

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

    if (rapl_backward) {
       test_fail(__FILE__, __LINE__,"RAPL counts went backward!",0);
    }

    test_pass( __FILE__, NULL, 0 );


    return 0;
}