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PAPI_read_counters(3) PAPI PAPI_read_counters(3)

NAME

PAPI_read_counters -
Read and reset counters.

SYNOPSIS

Detailed Description

@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

Author

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Thu Nov 17 2016 Version 5.5.1.0