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TAPSET::IOSCHED(3stap) TAPSET::IOSCHED(3stap)
NAME
tapset::iosched - systemtap IO scheduler probe points
DESCRIPTION
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
SEE ALSO
stap(1), stapprobes(3stap)
IBM
TAPSET::IOSCHED(3stap)