PAPI_remove_events(3)

NAME
PAPI_remove_events - Remove an array of hardware event codes 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 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 );

Parameters
    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.

Example:

    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 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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