PAPI_accum(3)

NAME
PAPI_accum -

Accumulate and reset counters in an EventSet.

SYNOPSIS

Detailed Description

@par C Interface:

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.
@param EventSet
    an integer handle for a PAPI Event Set
    as created by PAPI_create_eventset
@param *values
    an array to hold the counter values of the counting events
@retval PAPI_EINVAL
    One or more of the arguments is invalid.
@retval PAPI_ESYS
    A system or C library call failed inside PAPI, see the errno variable.
@retval PAPI_ENOEVST
    The event set specified does not exist.
@par 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

Author

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