svc: Report xprt dequeue latency

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Record the time between when a rqstp is enqueued on a transport
and when it is dequeued. This includes how long the rqstp waits on
the queue and how long it takes the kernel scheduler to wake a
nfsd thread to service it.

The svc_xprt_dequeue trace point is altered to include the number
of microseconds between xprt_enqueue and xprt_dequeue.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>

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Chuck Lever 2018-03-27 10:52:27 -04:00 • committed by J. Bruce Fields

parent aaba72cd4e

commit 55f5088c22

3 changed files with 29 additions and 6 deletions

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1

include/linux/sunrpc/svc.h

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30

include/trace/events/sunrpc.h

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