ipc.c

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/*
 * A simple example for the use of PAPI, using PAPI_ipc
 * -Kevin London
 */

#include "papi_test.h"


#define INDEX 500
extern int TESTS_QUIET;                /* Declared in test_utils.c */


int
main( int argc, char **argv )
{
    extern void dummy( void * );
    float matrixa[INDEX][INDEX], matrixb[INDEX][INDEX], mresult[INDEX][INDEX];
    float real_time, proc_time, ipc;
    long long ins;
    int retval;
    int i, j, k;

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


    /* Initialize the Matrix arrays */
    for( i = 0; i < INDEX; i++ ) {
       for( j= 0; j < INDEX; j++ ) {
           mresult[i][j] = 0.0;
           matrixa[i][j] = matrixb[i][j] = ( float ) rand(  ) * ( float ) 1.1;
       }
    }

    /* Setup PAPI library and begin collecting data from the counters */
    if ( ( retval = PAPI_ipc( &real_time, &proc_time, &ins, &ipc ) ) < PAPI_OK )
        test_fail( __FILE__, __LINE__, "PAPI_ipc", retval );

    /* Matrix-Matrix multiply */
    for ( i = 0; i < INDEX; i++ )
        for ( j = 0; j < INDEX; j++ )
            for ( k = 0; k < INDEX; k++ )
                mresult[i][j] = mresult[i][j] + matrixa[i][k] * matrixb[k][j];

    /* Collect the data into the variables passed in */
    if ( ( retval = PAPI_ipc( &real_time, &proc_time, &ins, &ipc ) ) < PAPI_OK )
        test_fail( __FILE__, __LINE__, "PAPI_ipc", retval );
    dummy( ( void * ) mresult );

    if ( !TESTS_QUIET ) {
        printf( "Real_time: %f Proc_time: %f Total ins: ", real_time,
                proc_time );
        printf( LLDFMT, ins );
        printf( " IPC: %f\n", ipc );
    }
   
           /* This should not happen unless the optimizer */
           /* gets too good                               */
        if (ins < INDEX*INDEX) {
       test_fail( __FILE__, __LINE__, "Instruction count too low.", 
              5 );
    }
           /* Something is broken, or else you have a really */
           /* slow processor                                 */
        if (ipc<0.01 ) {
       test_fail( __FILE__, __LINE__, "IPC equals zero.", 
              5 );
    }
   
    test_pass( __FILE__, NULL, 0 );
    exit( 1 );
}