PAPI_attach Class Reference

Attach PAPI event set to the specified thread id. More...


Detailed Description

C Interface:
#include <papi.h>
int PAPI_attach( int EventSet, unsigned long tid );

PAPI_attach is a wrapper function that calls PAPI_set_opt to allow PAPI to monitor performance counts on a thread other than the one currently executing. This is sometimes referred to as third party monitoring. PAPI_attach connects the specified EventSet to the specifed thread; PAPI_detach breaks that connection and restores the EventSet to the original executing thread.

Parameters:
EventSet An integer handle for a PAPI EventSet as created by PAPI_create_eventset.
tid A thread id as obtained from, for example, PAPI_list_threads or PAPI_thread_id.
Return values:
PAPI_ECMP This feature is unsupported on this component.
PAPI_EINVAL One or more of the arguments is invalid.
PAPI_ENOEVST The event set specified does not exist.
PAPI_EISRUN The event set is currently counting events.
Examples:
    int EventSet = PAPI_NULL;
    unsigned long pid;
    pid = fork( );
    if ( pid <= 0 )
    exit( 1 );
    if ( PAPI_create_eventset( &EventSet ) != PAPI_OK )
    exit( 1 );
    // Add Total Instructions Executed to our EventSet
    if ( PAPI_add_event( EventSet, PAPI_TOT_INS ) != PAPI_OK )
    exit( 1 );
    // Attach this EventSet to the forked process
    if ( PAPI_attach( EventSet, pid ) != PAPI_OK )
    exit( 1 );
See also:
PAPI_set_opt
PAPI_list_threads
PAPI_thread_id
PAPI_thread_init

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

Generated on 8 Sep 2016 for PAPI by  doxygen 1.6.1