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authorJim Keniston <jkenisto@us.ibm.com>2009-03-31 11:06:58 -0700
committerJim Keniston <jkenisto@us.ibm.com>2009-03-31 11:06:58 -0700
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+.\" -*- nroff -*-
+.TH STAPPROBES.IOSCHED 3stap @DATE@ "IBM"
+.SH NAME
+stapprobes.iosched \- systemtap IO scheduler probe points
+
+.\" macros
+.de SAMPLE
+.br
+.RS
+.nf
+.nh
+..
+.de ESAMPLE
+.hy
+.fi
+.RE
+..
+
+.SH DESCRIPTION
+
+This family of probe points is used to probe the IO scheduler
+activities. It contains the following probe points:
+
+.P
+.TP
+.B ioscheduler.elv_next_request
+Fires when retrieves a request from request queue
+
+.B Arguments:
+
+.I elevator_name
+ The elevator name
+
+.P
+.TP
+.B ioscheduler.elv_next_request.return
+Fires when return from retrieving a request
+
+.B Arguments:
+
+.I req
+ Address of the request
+
+.I req_flags
+ request flags
+
+.I disk_major
+ disk major number of the request
+
+.I disk_minor
+ disk minor number of the request
+
+.P
+.TP
+.B ioscheduler.elv_add_request
+Fires when add a request into request queue
+
+.B Arguments:
+
+.I elevator_name
+ The elevator name
+
+.I req
+ Address of the request
+
+.I req_flags
+ request flags
+
+.I disk_major
+ disk major number of the request
+
+.I disk_minor
+ disk minor number of the request
+
+.P
+.TP
+.B ioscheduler.elv_completed_request
+Fires when a request is completed
+
+.B Arguments:
+
+.I elevator_name
+ The elevator name
+
+.I req
+ Address of the request
+
+.I req_flags
+ request flags
+
+.I disk_major
+ disk major number of the request
+
+.I disk_minor
+ disk minor number of the request
+
+.SH SEE ALSO
+.IR stap (1),
+.IR stapprobes (3stap),
+