zero_pthreads.c

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/* This file performs the following test: start, stop and timer
functionality for 2 slave pthreads

   - It attempts to use the following two counters. It may use less
depending on hardware counter resource limitations. These are counted
in the default counting domain and default granularity, depending on
the platform. Usually this is the user domain (PAPI_DOM_USER) and
thread context (PAPI_GRN_THR).

     + PAPI_FP_INS
     + PAPI_TOT_CYC

Each of 2 slave pthreads:
   - Get cyc.
   - Get us.
   - Start counters
   - Do flops
   - Stop and read counters
   - Get us.
   - Get cyc.

Master pthread:
   - Get us.
   - Get cyc.
   - Fork threads
   - Wait for threads to exit
   - Get us.
   - Get cyc.
*/

#include <pthread.h>

#include "papi_test.h"

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

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

    printf( "Thread 0x%x started\n", ( int ) pthread_self(  ) );

    /* 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_events( &num_events1, &PAPI_event, &mask1 );

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

    values = allocate_test_space( num_tests, num_events1 );

    elapsed_us = PAPI_get_real_usec(  );
    elapsed_cyc = PAPI_get_real_cyc(  );

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

    do_flops( *( int * ) arg );

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

    elapsed_us = PAPI_get_real_usec(  ) - elapsed_us;
    elapsed_cyc = PAPI_get_real_cyc(  ) - elapsed_cyc;

    remove_test_events( &EventSet1, mask1 );

    if ( !TESTS_QUIET ) {
       printf( "Thread 0x%x %-12s : \t%lld\n", ( int ) pthread_self(  ),
                event_name, values[0][1] );
       printf( "Thread 0x%x PAPI_TOT_CYC : \t%lld\n", (int) pthread_self(),
                values[0][0] );
       printf( "Thread 0x%x Real usec    : \t%lld\n", 
            ( int ) pthread_self(  ),
                elapsed_us );
       printf( "Thread 0x%x Real cycles  : \t%lld\n", (int) pthread_self(),
                elapsed_cyc );
    }

    free_test_space( values, num_tests );

    retval = PAPI_unregister_thread(  );
    if ( retval != PAPI_OK )
        test_fail( __FILE__, __LINE__, "PAPI_unregister_thread", retval );
    return NULL;
}

int
main( int argc, char **argv )
{
    pthread_t e_th, f_th, g_th, h_th;
    int flops1, flops2, flops3, flops4;
    int retval, rc;
    pthread_attr_t attr;
    long long elapsed_us, elapsed_cyc;

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

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

    retval = PAPI_thread_init( ( unsigned long ( * )( void ) ) 
                   ( pthread_self ) );
    if ( retval != PAPI_OK ) {
       if ( retval == PAPI_ECMP ) {
          test_skip( __FILE__, __LINE__, "PAPI_thread_init", retval );
       }
       else {
          test_fail( __FILE__, __LINE__, "PAPI_thread_init", retval );
       }
    }

    elapsed_us = PAPI_get_real_usec(  );

    elapsed_cyc = PAPI_get_real_cyc(  );

    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

    flops1 = 1000000;
    rc = pthread_create( &e_th, &attr, Thread, ( void * ) &flops1 );
    if ( rc ) {
        retval = PAPI_ESYS;
        test_fail( __FILE__, __LINE__, "pthread_create", retval );
    }
    flops2 = 2000000;
    rc = pthread_create( &f_th, &attr, Thread, ( void * ) &flops2 );
    if ( rc ) {
        retval = PAPI_ESYS;
        test_fail( __FILE__, __LINE__, "pthread_create", retval );
    }

    flops3 = 4000000;
    rc = pthread_create( &g_th, &attr, Thread, ( void * ) &flops3 );
    if ( rc ) {
        retval = PAPI_ESYS;
        test_fail( __FILE__, __LINE__, "pthread_create", retval );
    }

    flops4 = 8000000;
    rc = pthread_create( &h_th, &attr, Thread, ( void * ) &flops4 );
    if ( rc ) {
        retval = PAPI_ESYS;
        test_fail( __FILE__, __LINE__, "pthread_create", retval );
    }

    pthread_attr_destroy( &attr );
    flops1 = 500000;
    Thread( &flops1 );
    pthread_join( h_th, NULL );
    pthread_join( g_th, NULL );
    pthread_join( f_th, NULL );
    pthread_join( e_th, NULL );

    elapsed_cyc = PAPI_get_real_cyc(  ) - elapsed_cyc;
    elapsed_us = PAPI_get_real_usec(  ) - elapsed_us;

    if ( !TESTS_QUIET ) {
        printf( "Master real usec   : \t%lld\n", elapsed_us );
        printf( "Master real cycles : \t%lld\n", elapsed_cyc );
    }

    test_pass( __FILE__, NULL, 0 );
    pthread_exit( NULL );
    exit( 1 );
}