Accumulate and reset counters in an EventSet. More...

Detailed Description

C Interface:: #include <papi.h>
int PAPI_accum( int EventSet, long_long * values );

These calls assume an initialized PAPI library and a properly added event set. PAPI_accum adds the counters of the indicated event set into the array values. The counters are zeroed and continue counting after the operation. Note the differences between PAPI_read and PAPI_accum, specifically that PAPI_accum resets the values array to zero.

Parameters:

EventSet	an integer handle for a PAPI Event Set as created by PAPI_create_eventset
*values	an array to hold the counter values of the counting events

Return values:

PAPI_EINVAL	One or more of the arguments is invalid.
PAPI_ESYS	A system or C library call failed inside PAPI, see the errno variable.
PAPI_ENOEVST	The event set specified does not exist.

Examples:

    do_100events( );
    if ( PAPI_read( EventSet, values) != PAPI_OK )
    handle_error( 1 );
    // values[0] now equals 100
    do_100events( );
    if (PAPI_accum( EventSet, values ) != PAPI_OK )
    handle_error( 1 );
    // values[0] now equals 200
    values[0] = -100;
    do_100events( );
    if (PAPI_accum( EventSet, values ) != PAPI_OK )
    handle_error( 1 );
    // values[0] now equals 0

See also:: PAPIF_accum; PAPI_start; PAPI_set_opt; PAPI_reset

The documentation for this class was generated from the following file:

papi.c