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:

Author¶

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