xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

svc: Report xprt dequeue latency

Browse Source 
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>
This commit is contained in:
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
Download Patch File Download Diff File Expand all files Collapse all files

30
include/trace/events/sunrpc.h
View File

@@ -657,14 +657,36 @@ DECLARE_EVENT_CLASS(svc_xprt_event,
show_svc_xprt_flags(__entry->flags))
);
DEFINE_EVENT(svc_xprt_event, svc_xprt_dequeue,
TP_PROTO(struct svc_xprt *xprt),
TP_ARGS(xprt));
DEFINE_EVENT(svc_xprt_event, svc_xprt_no_write_space,
TP_PROTO(struct svc_xprt *xprt),
TP_ARGS(xprt));
TRACE_EVENT(svc_xprt_dequeue,
TP_PROTO(struct svc_rqst *rqst),
TP_ARGS(rqst),
TP_STRUCT__entry(
__field(struct svc_xprt *, xprt)
__field(unsigned long, flags)
__field(unsigned long, wakeup)
__string(addr, rqst->rq_xprt->xpt_remotebuf)
),
TP_fast_assign(
__entry->xprt = rqst->rq_xprt;
__entry->flags = rqst->rq_xprt->xpt_flags;
__entry->wakeup = ktime_to_us(ktime_sub(ktime_get(),
rqst->rq_qtime));
__assign_str(addr, rqst->rq_xprt->xpt_remotebuf);
),
TP_printk("xprt=%p addr=%s flags=%s wakeup-us=%lu",
__entry->xprt, __get_str(addr),
show_svc_xprt_flags(__entry->flags),
__entry->wakeup)
);
TRACE_EVENT(svc_wake_up,
TP_PROTO(int pid),