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| author |   Chuck Lever <chuck.lever@oracle.com> | 2018-03-27 10:52:27 -0400 |
|---|---|---|
| committer |   J. Bruce Fields <bfields@redhat.com> | 2018-04-03 15:08:13 -0400 |
| commit | 55f5088c22cc83dbc64394abfbf76cd1ff5e7cd0 (patch) | |
| tree | 229d0f82add5b8107c1a9ebe3890d43507a5dcc2 /net/sunrpc | |
| parent | sunrpc: Report per-RPC execution stats (diff) | |
| download | linux-dev-55f5088c22cc83dbc64394abfbf76cd1ff5e7cd0.tar.xz linux-dev-55f5088c22cc83dbc64394abfbf76cd1ff5e7cd0.zip | |
svc: Report xprt dequeue latency
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>
Diffstat (limited to 'net/sunrpc')
| -rw-r--r-- | net/sunrpc/svc_xprt.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/net/sunrpc/svc_xprt.c b/net/sunrpc/svc_xprt.c index a7425da14f5b..5185efb9027b 100644 --- a/net/sunrpc/svc_xprt.c +++ b/net/sunrpc/svc_xprt.c @@ -409,6 +409,7 @@ void svc_xprt_do_enqueue(struct svc_xprt *xprt) if (test_and_set_bit(RQ_BUSY, &rqstp->rq_flags)) continue; atomic_long_inc(&pool->sp_stats.threads_woken); + rqstp->rq_qtime = ktime_get(); wake_up_process(rqstp->rq_task); goto out_unlock; } @@ -530,7 +531,6 @@ void svc_wake_up(struct svc_serv *serv) if (test_bit(RQ_BUSY, &rqstp->rq_flags)) continue; rcu_read_unlock(); - dprintk("svc: daemon %p woken up.\n", rqstp); wake_up_process(rqstp->rq_task); trace_svc_wake_up(rqstp->rq_task->pid); return; @@ -726,7 +726,7 @@ out_found: rqstp->rq_chandle.thread_wait = 5*HZ; else rqstp->rq_chandle.thread_wait = 1*HZ; - trace_svc_xprt_dequeue(rqstp->rq_xprt); + trace_svc_xprt_dequeue(rqstp); return rqstp->rq_xprt; } |