calibrate.c

Go to the documentation of this file.

/*
   Calibrate.c
        A program to perform one or all of three tests to count flops.
        Test 1. Inner Product:                          2*n operations
                for i = 1:n; a = a + x(i)*y(i); end
        Test 2. Matrix Vector Product:          2*n^2 operations
                for i = 1:n; for j = 1:n; x(i) = x(i) + a(i,j)*y(j); end; end;
        Test 3. Matrix Matrix Multiply:         2*n^3 operations
                for i = 1:n; for j = 1:n; for k = 1:n; c(i,j) = c(i,j) + a(i,k)*b(k,j); end; end; end;

  Supply a command line argument of 1, 2, or 3 to perform each test, or
  no argument to perform all three.

  Each test initializes PAPI and presents a header with processor information.
  Then it performs 500 iterations, printing result lines containing:
  n, measured counts, theoretical counts, (measured - theory), % error
 */

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

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

#define INDEX1 100
#define INDEX5 500

#define MAX_WARN 10
#define MAX_ERROR 80
#define MAX_DIFF  14

/*
        Extract and display hardware information for this processor.
        (Re)Initialize PAPI_flops() and begin counting floating ops.
*/
static void
headerlines( const char *title, int quiet )
{

    if ( !quiet ) {
        printf( "\n%s:\n%8s %12s %12s %8s %8s\n", title, "i", "papi", "theory",
                "diff", "%error" );
        printf( "-------------------------------------------------------------------------\n" );
    }
}

/*
  Read PAPI_flops.
  Format and display results.
  Compute error without using floating ops.
*/
#if defined(mips)
#define FMA 1
#elif (defined(sparc) && defined(sun))
#define FMA 1
#else
#define FMA 0
#endif

static void
resultline( int i, int j, int EventSet, int fail, int quiet )
{
    float ferror = 0;
    long long flpins = 0;
    long long papi, theory;
    int diff, retval;
    char err_str[PAPI_MAX_STR_LEN];

    retval = PAPI_stop( EventSet, &flpins );
    if ( retval != PAPI_OK )
        test_fail( __FILE__, __LINE__, "PAPI_stop", retval );

    i++;                     /* convert to 1s base  */
    theory = 2;
    while ( j-- )
        theory *= i;         /* theoretical ops   */
    papi = flpins << FMA;

    diff = ( int ) ( papi - theory );

    ferror = ( ( float ) abs( diff ) ) / ( ( float ) theory ) * 100;

    if (!quiet) {
        printf( "%8d %12lld %12lld %8d %10.4f\n", i, papi, theory, diff, ferror );
    }

    if ( ferror > MAX_WARN && abs( diff ) > MAX_DIFF && i > 20 ) {
        sprintf( err_str, "Calibrate: difference exceeds %d percent", MAX_WARN );
        test_warn( __FILE__, __LINE__, err_str, 0 );
    }
    if (fail) {
        if ( ferror > MAX_ERROR && abs( diff ) > MAX_DIFF && i > 20 ) {
            sprintf( err_str, "Calibrate: error exceeds %d percent", MAX_ERROR );
            test_fail( __FILE__, __LINE__, err_str, PAPI_EMISC );
        }
    }
}


static void
print_help( char **argv )
{
    printf( "Usage: %s [-ivmdh] [-e event]\n", argv[0] );
    printf( "Options:\n\n" );
    printf( "\t-i            Inner Product test.\n" );
    printf( "\t-v            Matrix-Vector multiply test.\n" );
    printf( "\t-m            Matrix-Matrix multiply test.\n" );
    printf( "\t-d            Double precision data. Default is float.\n" );
    printf( "\t-e event      Use <event> as PAPI event instead of PAPI_FP_OPS\n" );
    printf( "\t-f            Suppress failures\n" );
    printf( "\t-h            Print this help message\n" );
    printf( "\n" );
    printf( "This test measures floating point operations for the specified test.\n" );
    printf( "Operations can be performed in single or double precision.\n" );
    printf( "Default operation is all three tests in single precision.\n" );
}

static float
inner_single( int n, float *x, float *y )
{
    float aa = 0.0;
    int i;

    for ( i = 0; i <= n; i++ )
        aa = aa + x[i] * y[i];
    return ( aa );
}

static double
inner_double( int n, double *x, double *y )
{
    double aa = 0.0;
    int i;

    for ( i = 0; i <= n; i++ )
        aa = aa + x[i] * y[i];
    return ( aa );
}

static void
vector_single( int n, float *a, float *x, float *y )
{
    int i, j;

    for ( i = 0; i <= n; i++ )
        for ( j = 0; j <= n; j++ )
            y[i] = y[i] + a[i * n + j] * x[i];
}

static void
vector_double( int n, double *a, double *x, double *y )
{
    int i, j;

    for ( i = 0; i <= n; i++ )
        for ( j = 0; j <= n; j++ )
            y[i] = y[i] + a[i * n + j] * x[i];
}

static void
matrix_single( int n, float *c, float *a, float *b )
{
    int i, j, k;

    for ( i = 0; i <= n; i++ )
        for ( j = 0; j <= n; j++ )
            for ( k = 0; k <= n; k++ )
                c[i * n + j] = c[i * n + j] + a[i * n + k] * b[k * n + j];
}

static void
matrix_double( int n, double *c, double *a, double *b )
{
    int i, j, k;

    for ( i = 0; i <= n; i++ )
        for ( j = 0; j <= n; j++ )
            for ( k = 0; k <= n; k++ )
                c[i * n + j] = c[i * n + j] + a[i * n + k] * b[k * n + j];
}

static void
reset_flops( const char *title, int EventSet )
{
    int retval;
    char err_str[PAPI_MAX_STR_LEN];

    retval = PAPI_start( EventSet );
    if ( retval != PAPI_OK ) {
        sprintf( err_str, "%s: PAPI_start", title );
        test_fail( __FILE__, __LINE__, err_str, retval );
    }
}

int
main( int argc, char *argv[] )
{
    extern void dummy( void * );

    float aa, *a=NULL, *b=NULL, *c=NULL, *x=NULL, *y=NULL;
    double aad, *ad=NULL, *bd=NULL, *cd=NULL, *xd=NULL, *yd=NULL;
    int i, j, n;
    int inner = 0;
    int vector = 0;
    int matrix = 0;
    int double_precision = 0;
    int fail = 1;
    int retval = PAPI_OK;
    char papi_event_str[PAPI_MIN_STR_LEN] = "PAPI_FP_OPS";
    int papi_event;
    int EventSet = PAPI_NULL;
    int quiet;

    /* Parse the input arguments */
    for ( i = 0; i < argc; i++ ) {
        if ( strstr( argv[i], "-i" ) )
            inner = 1;
        else if ( strstr( argv[i], "-f" ) )
            fail = 0;
        else if ( strstr( argv[i], "-v" ) )
            vector = 1;
        else if ( strstr( argv[i], "-m" ) )
            matrix = 1;
        else if ( strstr( argv[i], "-e" ) ) {
            if ( ( argv[i + 1] == NULL ) || ( strlen( argv[i + 1] ) == 0 ) ) {
                print_help( argv );
                exit( 1 );
            }
            strncpy( papi_event_str, argv[i + 1], sizeof ( papi_event_str ) - 1);
            papi_event_str[sizeof ( papi_event_str )-1] = '\0';
            i++;
        } else if ( strstr( argv[i], "-d" ) )
            double_precision = 1;
        else if ( strstr( argv[i], "-h" ) ) {
            print_help( argv );
            exit( 1 );
        }
    }

    /* if no options specified, set all tests to TRUE */
    if ( inner + vector + matrix == 0 )
        inner = vector = matrix = 1;


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

    if ( !quiet ) {
        printf( "Initializing..." );
    }

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

    /* Translate name */
    retval = PAPI_event_name_to_code( papi_event_str, &papi_event );
    if ( retval != PAPI_OK ) {
        test_fail( __FILE__, __LINE__, "PAPI_event_name_to_code", retval );
    }

    if ( PAPI_query_event( papi_event ) != PAPI_OK ) {
        test_skip( __FILE__, __LINE__, "PAPI_query_event", PAPI_ENOEVNT );
    }

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

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

    if (!quiet) printf( "\n" );

    retval = PAPI_OK;

    /* Inner Product test */
    if ( inner ) {
        /* Allocate the linear arrays */
       if (double_precision) {
            xd = malloc( INDEX5 * sizeof(double) );
            yd = malloc( INDEX5 * sizeof(double) );
        if ( !( xd && yd ) )
            retval = PAPI_ENOMEM;
       }
       else {
            x = malloc( INDEX5 * sizeof(float) );
        y = malloc( INDEX5 * sizeof(float) );
        if ( !( x && y ) )
            retval = PAPI_ENOMEM;
       }

        if ( retval == PAPI_OK ) {
            headerlines( "Inner Product Test", quiet );

            /* step through the different array sizes */
            for ( n = 0; n < INDEX5; n++ ) {
                if ( n < INDEX1 || ( ( n + 1 ) % 50 ) == 0 ) {

                    /* Initialize the needed arrays at this size */
                    if ( double_precision ) {
                        for ( i = 0; i <= n; i++ ) {
                            xd[i] = ( double ) rand(  ) * ( double ) 1.1;
                            yd[i] = ( double ) rand(  ) * ( double ) 1.1;
                        }
                    } else {
                        for ( i = 0; i <= n; i++ ) {
                            x[i] = ( float ) rand(  ) * ( float ) 1.1;
                            y[i] = ( float ) rand(  ) * ( float ) 1.1;
                        }
                    }

                    /* reset PAPI flops count */
                    reset_flops( "Inner Product Test", EventSet );

                    /* do the multiplication */
                    if ( double_precision ) {
                        aad = inner_double( n, xd, yd );
                        dummy( ( void * ) &aad );
                    } else {
                        aa = inner_single( n, x, y );
                        dummy( ( void * ) &aa );
                    }
                    resultline( n, 1, EventSet, fail, quiet );
                }
            }
        }
        if (double_precision) {
            free( xd );
            free( yd );
        } else {
            free( x );
            free( y );
        }
    }

    /* Matrix Vector test */
    if ( vector && retval != PAPI_ENOMEM ) {
        /* Allocate the needed arrays */
      if (double_precision) {
            ad = malloc( INDEX5 * INDEX5 * sizeof(double) );
            xd = malloc( INDEX5 * sizeof(double) );
            yd = malloc( INDEX5 * sizeof(double) );
        if ( !( ad && xd && yd ) )
            retval = PAPI_ENOMEM;
      } else {
            a = malloc( INDEX5 * INDEX5 * sizeof(float) );
            x = malloc( INDEX5 * sizeof(float) );
            y = malloc( INDEX5 * sizeof(float) );
        if ( !( a && x && y ) )
            retval = PAPI_ENOMEM;
      }

        if ( retval == PAPI_OK ) {
            headerlines( "Matrix Vector Test", quiet );

            /* step through the different array sizes */
            for ( n = 0; n < INDEX5; n++ ) {
                if ( n < INDEX1 || ( ( n + 1 ) % 50 ) == 0 ) {

                    /* Initialize the needed arrays at this size */
                    if ( double_precision ) {
                        for ( i = 0; i <= n; i++ ) {
                            yd[i] = 0.0;
                            xd[i] = ( double ) rand(  ) * ( double ) 1.1;
                            for ( j = 0; j <= n; j++ )
                                ad[i * n + j] =
                                    ( double ) rand(  ) * ( double ) 1.1;
                        }
                    } else {
                        for ( i = 0; i <= n; i++ ) {
                            y[i] = 0.0;
                            x[i] = ( float ) rand(  ) * ( float ) 1.1;
                            for ( j = 0; j <= n; j++ )
                                a[i * n + j] =
                                    ( float ) rand(  ) * ( float ) 1.1;
                        }
                    }

                    /* reset PAPI flops count */
                    reset_flops( "Matrix Vector Test", EventSet );

                    /* compute the resultant vector */
                    if ( double_precision ) {
                        vector_double( n, ad, xd, yd );
                        dummy( ( void * ) yd );
                    } else {
                        vector_single( n, a, x, y );
                        dummy( ( void * ) y );
                    }
                    resultline( n, 2, EventSet, fail, quiet );
                }
            }
        }
        if (double_precision) {
            free( ad );
            free( xd );
            free( yd );
        } else {
            free( a );
            free( x );
            free( y );
        }
    }

    /* Matrix Multiply test */
    if ( matrix && retval != PAPI_ENOMEM ) {
        /* Allocate the needed arrays */
      if (double_precision) {
            ad = malloc( INDEX5 * INDEX5 * sizeof(double) );
            bd = malloc( INDEX5 * INDEX5 * sizeof(double) );
            cd = malloc( INDEX5 * INDEX5 * sizeof(double) );
        if ( !( ad && bd && cd ) )
            retval = PAPI_ENOMEM;
      } else {
            a = malloc( INDEX5 * INDEX5 * sizeof(float) );
            b = malloc( INDEX5 * INDEX5 * sizeof(float) );
            c = malloc( INDEX5 * INDEX5 * sizeof(float) );
        if ( !( a && b && c ) )
            retval = PAPI_ENOMEM;
      }


        if ( retval == PAPI_OK ) {
            headerlines( "Matrix Multiply Test", quiet );

            /* step through the different array sizes */
            for ( n = 0; n < INDEX5; n++ ) {
                if ( n < INDEX1 || ( ( n + 1 ) % 50 ) == 0 ) {

                    /* Initialize the needed arrays at this size */
                    if ( double_precision ) {
                        for ( i = 0; i <= n * n + n; i++ ) {
                            cd[i] = 0.0;
                            ad[i] = ( double ) rand(  ) * ( double ) 1.1;
                            bd[i] = ( double ) rand(  ) * ( double ) 1.1;
                        }
                    } else {
                        for ( i = 0; i <= n * n + n; i++ ) {
                            c[i] = 0.0;
                            a[i] = ( float ) rand(  ) * ( float ) 1.1;
                            b[i] = ( float ) rand(  ) * ( float ) 1.1;
                        }
                    }

                    /* reset PAPI flops count */
                    reset_flops( "Matrix Multiply Test", EventSet );

                    /* compute the resultant matrix */
                    if ( double_precision ) {
                        matrix_double( n, cd, ad, bd );
                        dummy( ( void * ) c );
                    } else {
                        matrix_single( n, c, a, b );
                        dummy( ( void * ) c );
                    }
                    resultline( n, 3, EventSet, fail, quiet );
                }
            }
        }
        if (double_precision) {
            free( ad );
            free( bd );
            free( cd );
        } else {
            free( a );
            free( b );
            free( c );
        }
    }

    /* exit with status code */
    if ( retval == PAPI_ENOMEM ) {
        test_fail( __FILE__, __LINE__, "malloc", retval );
    }

    test_pass( __FILE__ );

    return 0;
}