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GNU/Linux |
CentOS 5.2 |
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stapprobes.iosched(5) |
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stapprobes.iosched − systemtap IO scheduler probe points
This family of
probe points is used to probe the IO scheduler activities.
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
stap(1), stapprobes(5),
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stapprobes.iosched(5) | |