PAPI_detach (3) - Linux Manuals


PAPI_detach -

Detach PAPI event set from previously specified thread id and restore to executing thread.


Detailed Description

@par C Interface:
#include <papi.h> @n
int PAPI_detach( int  EventSet, unsigned long  tid );

PAPI_detach 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. 

@param EventSet 
    An integer handle for a PAPI EventSet as created by PAPI_create_eventset.
@param tid 
    A thread id as obtained from, for example, PAPI_list_threads or PAPI_thread_id.

@retval PAPI_ECMP
    This feature is unsupported on this component.
@retval PAPI_EINVAL 
    One or more of the arguments is invalid.
    The event set specified does not exist.
@retval PAPI_EISRUN 
    The event set is currently counting events. 

@par 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:






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