PAPI 7.1.0.0
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PAPI_start Class Reference

Start counting hardware events in an event set. More...

Detailed Description

C Interface:
#include <papi.h>
int PAPI_start( int EventSet );
Parameters
EventSet– an integer handle for a PAPI event set as created by PAPI_create_eventset
Return values
PAPI_OK
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_ENOEVST– The EventSet specified does not exist.
PAPI_EISRUN– The EventSet is currently counting events.
PAPI_ECNFLCT– The underlying counter hardware can not count this event and other events in the EventSet simultaneously.
PAPI_ENOEVNT– The PAPI preset is not available on the underlying hardware.

PAPI_start starts counting all of the hardware events contained in the previously defined EventSet. All counters are implicitly set to zero before counting. Assumes an initialized PAPI library and a properly added event set.

Example:
long long values[2];
int ret;
if (ret != PAPI_OK) handle_error(ret);
// Add Total Instructions Executed to our EventSet
if (ret != PAPI_OK) handle_error(ret);
// Start counting
if (ret != PAPI_OK) handle_error(ret);
if (ret != PAPI_OK) handle_error(ret);
printf("%lld\\n",values[0]);
int poorly_tuned_function()
Definition: PAPI_get_opt.c:14
add PAPI preset or native hardware event to an event set
Create a new empty PAPI EventSet.
Start counting hardware events in an event set.
Stop counting hardware events in an event set.
#define PAPI_OK
Definition: f90papi.h:73
#define PAPI_NULL
Definition: f90papi.h:78
#define PAPI_TOT_INS
Definition: f90papi.h:317
static int EventSet
Definition: init_fini.c:8
static long long values[NUM_EVENTS]
Definition: init_fini.c:10
See also
PAPI_create_eventset PAPI_add_event PAPI_stop

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