overflow3_pthreads.c

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/*
* File:    overflow3_pthreads.c
* Author:  Philip Mucci
*          mucci@cs.utk.edu
*/

/* This file tests the overflow functionality when there are
 * threads in which the application isn't calling PAPI (and only
 * one thread that is calling PAPI.)
 */

#include <stdio.h>
#include <stdlib.h>
#include <pthread.h>

#include "papi.h"
#include "papi_test.h"

#include "do_loops.h"

int total = 0;

void *
thread_fn( void *dummy )
{
    ( void ) dummy;
    while ( 1 ) {
        do_stuff(  );
    }
    return ( NULL );
}

void
handler( int EventSet, void *address, long long overflow_vector, void *context )
{
    ( void ) overflow_vector;
    ( void ) context;
    if ( !TESTS_QUIET ) {
        fprintf( stderr, "handler(%d ) Overflow at %p, thread %#lx!\n",
                 EventSet, address, PAPI_thread_id(  ) );
    }
    total++;
}

void
mainloop( int arg )
{
    int retval, num_tests = 1;
    int EventSet1 = PAPI_NULL;
    int mask1 = 0x0;
    int num_events1;
    long long **values;
    int PAPI_event;
    char event_name[PAPI_MAX_STR_LEN];

    ( void ) arg;

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

    /* add PAPI_TOT_CYC and one of the events in PAPI_FP_INS, PAPI_FP_OPS or
       PAPI_TOT_INS, depending on the availability of the event on the
       platform */
    EventSet1 = add_two_nonderived_events( &num_events1,
            &PAPI_event, &mask1 );

    if (num_events1==0) {
        if (!TESTS_QUIET) printf("Trouble creating events\n");
        test_skip(__FILE__,__LINE__,"Creating events",0);
    }

    values = allocate_test_space( num_tests, num_events1 );

    if ( ( retval =
           PAPI_overflow( EventSet1, PAPI_event, THRESHOLD, 0,
                          handler ) ) != PAPI_OK )
        test_fail( __FILE__, __LINE__, "PAPI_overflow", retval );

    do_stuff(  );

    if ( ( retval = PAPI_start( EventSet1 ) ) != PAPI_OK )
        test_fail( __FILE__, __LINE__, "PAPI_start", retval );

    do_stuff(  );

    if ( ( retval = PAPI_stop( EventSet1, values[0] ) ) != PAPI_OK )
        test_fail( __FILE__, __LINE__, "PAPI_stop", retval );

    /* clear the papi_overflow event */
    if ( ( retval =
           PAPI_overflow( EventSet1, PAPI_event, 0, 0, NULL ) ) != PAPI_OK )
        test_fail( __FILE__, __LINE__, "PAPI_overflow", retval );

    if ( ( retval =
           PAPI_event_code_to_name( PAPI_event, event_name ) ) != PAPI_OK )
        test_fail( __FILE__, __LINE__, "PAPI_event_code_to_name", retval );

    if ( !TESTS_QUIET ) {
        printf( "Thread %#x %s : \t%lld\n", ( int ) pthread_self(  ),
                event_name, ( values[0] )[0] );
        printf( "Thread %#x PAPI_TOT_CYC: \t%lld\n", ( int ) pthread_self(  ),
                ( values[0] )[1] );
    }

    retval = PAPI_cleanup_eventset( EventSet1 );
    if ( retval != PAPI_OK )
        test_fail( __FILE__, __LINE__, "PAPI_cleanup_eventset", retval );

    retval = PAPI_destroy_eventset( &EventSet1 );
    if ( retval != PAPI_OK )
        test_fail( __FILE__, __LINE__, "PAPI_destroy_eventset", retval );

    free_test_space( values, num_tests );
    PAPI_shutdown(  );
}

int
main( int argc, char **argv )
{
    int i, rc, retval;
    pthread_t id[NUM_THREADS];
    pthread_attr_t attr;
    int quiet;

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

    if (!quiet) {
        printf( "%s: Using %d threads\n\n", argv[0], NUM_THREADS );
        printf( "Does non-threaded overflow work "
            "with extraneous threads present?\n" );
    }

    pthread_attr_init( &attr );
#ifdef PTHREAD_CREATE_UNDETACHED
    pthread_attr_setdetachstate( &attr, PTHREAD_CREATE_UNDETACHED );
#endif
#ifdef PTHREAD_SCOPE_SYSTEM
    retval = pthread_attr_setscope( &attr, PTHREAD_SCOPE_SYSTEM );
    if ( retval != 0 )
        test_skip( __FILE__, __LINE__, "pthread_attr_setscope", retval );
#endif

    for ( i = 0; i < NUM_THREADS; i++ ) {
        rc = pthread_create( &id[i], &attr, thread_fn, NULL );
        if ( rc )
            test_fail( __FILE__, __LINE__, "pthread_create", rc );
    }
    pthread_attr_destroy( &attr );

    mainloop( NUM_ITERS );

    test_pass( __FILE__ );

    return 0;
}