PAPI_remove_event

NAME

PAPI_remove_event -

removes a hardware event from a PAPI event set.

SYNOPSIS

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 the current platform, run papi_native_avail in the PAPI distribution.

C Interface:

#include <papi.h>
int PAPI_remove_event( int EventSet, int EventCode );

Parameters:

EventSet -- an integer handle for a PAPI event set as created by PAPI_create_eventset
EventCode -- a defined event such as PAPI_TOT_INS or a native event.

Return values:

PAPI_OK Everything worked.
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.

Example:

int EventSet = PAPI_NULL;
int ret;

// Create an empty EventSet
ret = PAPI_create_eventset(&EventSet);
if (ret != PAPI_OK) handle_error(ret);

// Add Total Instructions Executed to our EventSet
ret = PAPI_add_event(EventSet, PAPI_TOT_INS);
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_event(EventSet, PAPI_TOT_INS);
if (ret != PAPI_OK) handle_error(ret);

See Also:

PAPI_cleanup_eventset

PAPI_destroy_eventset

PAPI_event_name_to_code

PAPI_presets

PAPI_add_event

PAPI_add_events

Author

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