From 55f5088c22cc83dbc64394abfbf76cd1ff5e7cd0 Mon Sep 17 00:00:00 2001 From: Chuck Lever Date: Tue, 27 Mar 2018 10:52:27 -0400 Subject: 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 Signed-off-by: J. Bruce Fields --- include/trace/events/sunrpc.h | 30 ++++++++++++++++++++++++++---- 1 file changed, 26 insertions(+), 4 deletions(-) (limited to 'include/trace/events/sunrpc.h') diff --git a/include/trace/events/sunrpc.h b/include/trace/events/sunrpc.h index 1b383f71ccd7..922cb8968fb2 100644 --- a/include/trace/events/sunrpc.h +++ b/include/trace/events/sunrpc.h @@ -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), -- cgit