PAPI_accum_counters Class Reference

Accumulate and reset counters. More...


Detailed Description

C Interface:
#include <papi.h>
int PAPI_accum_counters( long long *values, int array_len );
Parameters:
*values an array to hold the counter values of the counting events
arry_len the number of items in the *events array
Precondition:
These calls assume an initialized PAPI library and a properly added event set.
Postcondition:
The counters are reset and left running after the call.
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_accum_counters() adds the event counters into the array *values.

do_100events();
if ( PAPI_read_counters( values, num_hwcntrs ) != PAPI_OK )
    handlw_error(1);
// values[0] now equals 100 
do_100events();
if ( PAPI_accum_counters( values, num_hwcntrs ) != PAPI_OK )
    handle_error(1);
// values[0] now equals 200
values[0] = -100;
do_100events();
if ( PAPI_accum_counters(values, num_hwcntrs ) != PAPI_OK )
    handle_error();
// values[0] now equals 0
See also:
PAPI_set_opt() PAPI_start_counters()

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

Generated on 8 Sep 2016 for PAPI by  doxygen 1.6.1