stapprobes.iosched

STAPPROBES.IOSCHED(5)					STAPPROBES.IOSCHED(5)



NAME
       stapprobes.iosched - systemtap IO scheduler probe points



DESCRIPTION
       This  family of probe points is used to probe the IO scheduler activi-
       ties.  It contains the following probe points:



       ioscheduler.elv_next_request
	      Fires when retrieves a request from request queue

	      Arguments:

	      elevator_name
		The elevator name



       ioscheduler.elv_next_request.return
	      Fires when return from retrieving a request

	      Arguments:

	      req
		Address of the request

	      req_flags
		request flags

	      disk_major
		disk major number of the request

	      disk_minor
		disk minor number of the request



       ioscheduler.elv_add_request
	      Fires when add a request into request queue

	      Arguments:

	      elevator_name
		The elevator name

	      req
		Address of the request

	      req_flags
		request flags

	      disk_major
		disk major number of the request

	      disk_minor
		disk minor number of the request



       ioscheduler.elv_completed_request
	      Fires when a request is completed

	      Arguments:

	      elevator_name
		The elevator name

	      req
		Address of the request

	      req_flags
		request flags

	      disk_major
		disk major number of the request

	      disk_minor
		disk minor number of the request


SEE ALSO
       stap(1), stapprobes(5),




IBM				  2009-04-20		STAPPROBES.IOSCHED(5)