DOKK / manpages / debian 10 / libpapi-dev / PAPI_read_counters.3.en
PAPI_read_counters(3) PAPI PAPI_read_counters(3)

PAPI_read_counters -

Read and reset counters.

@par C Interface:
int PAPI_read_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_read_counters() copies 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()

Fortran Interface:

#include 'fpapi.h'
PAPIF_read_counters( C_LONG_LONG(*) values, C_INT array_len, C_INT check )

See Also:

PAPI_read_counters

Generated automatically by Doxygen for PAPI from the source code.

Fri Feb 22 2019 Version 5.7.0.0