PAPI_remove_events (3) - Linux Manuals


PAPI_remove_events -

Remove an array of hardware event codes from a PAPI event set.


Detailed Description

A hardware event can be either a PAPI Preset or a native hardware event code. For a list of PAPI preset events, see PAPI_presets or run the papi_avail utility in the PAPI distribution. PAPI Presets can be passed to PAPI_query_event to see if they exist on the underlying architecture. For a list of native events available on current platform, run papi_native_avail in the PAPI distribution. It should be noted that PAPI_remove_events can partially succeed, exactly like PAPI_add_events.

C Prototype:

#include <papi.h>

 int PAPI_remove_events( int  EventSet, int EventCode, int  number );


EventSet an integer handle for a PAPI event set as created by PAPI_create_eventset
*Events an array of defined events
number an integer indicating the number of events in the array *EventCode

Return values:

Positive integer The number of consecutive elements that succeeded before the error.
PAPI_EINVAL One or more of the arguments is invalid.
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.


int EventSet = PAPI_NULL;
int Events[] = {PAPI_TOT_INS, PAPI_FP_OPS};
int ret;
 // Create an empty EventSet
ret = PAPI_create_eventset(&EventSet);
if (ret != PAPI_OK) handle_error(ret);

// Add two events to our EventSet
ret = PAPI_add_events(EventSet, Events, 2);
if (ret != PAPI_OK) handle_error(ret);

// Start counting
ret = PAPI_start(EventSet);
if (ret != PAPI_OK) handle_error(ret);

// Stop counting, ignore values
ret = PAPI_stop(EventSet, NULL);
if (ret != PAPI_OK) handle_error(ret);

// Remove event
ret = PAPI_remove_events(EventSet, Events, 2);
if (ret != PAPI_OK) handle_error(ret);

@see PAPI_cleanup_eventset PAPI_destroy_eventset PAPI_event_name_to_code 
    PAPI_presets PAPI_add_event



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