@@ -634,24 +634,18 @@
TP_STRUCT__entry(
__field(struct svc_xprt *, xprt)
__field(unsigned long, flags)
- __dynamic_array(unsigned char, addr, xprt != NULL ?
- xprt->xpt_remotelen : 0)
+ __dynamic_array(unsigned char, addr, xprt->xpt_remotelen)
),
TP_fast_assign(
__entry->xprt = xprt;
- if (xprt) {
- memcpy(__get_dynamic_array(addr),
- &xprt->xpt_remote,
- xprt->xpt_remotelen);
- __entry->flags = xprt->xpt_flags;
- } else
- __entry->flags = 0;
+ __entry->flags = xprt->xpt_flags;
+ memcpy(__get_dynamic_array(addr),
+ &xprt->xpt_remote, xprt->xpt_remotelen);
),
TP_printk("xprt=0x%p addr=%pIScp flags=%s", __entry->xprt,
- __get_dynamic_array_len(addr) != 0 ?
- (struct sockaddr *)__get_dynamic_array(addr) : NULL,
+ (struct sockaddr *)__get_dynamic_array(addr),
show_svc_xprt_flags(__entry->flags))
);
@@ -454,13 +454,9 @@ static struct svc_xprt *svc_xprt_dequeue(struct svc_pool *pool)
struct svc_xprt, xpt_ready);
list_del_init(&xprt->xpt_ready);
svc_xprt_get(xprt);
-
- dprintk("svc: transport %p dequeued, inuse=%d\n",
- xprt, kref_read(&xprt->xpt_ref));
}
spin_unlock_bh(&pool->sp_lock);
out:
- trace_svc_xprt_dequeue(xprt);
return xprt;
}
@@ -734,6 +730,7 @@ static struct svc_xprt *svc_get_next_xprt(struct svc_rqst *rqstp, long timeout)
rqstp->rq_chandle.thread_wait = 5*HZ;
else
rqstp->rq_chandle.thread_wait = 1*HZ;
+ trace_svc_xprt_dequeue(rqstp->rq_xprt);
return rqstp->rq_xprt;
}
Reduce the amount of noise generated by trace_svc_xprt_dequeue by moving it to the end of svc_get_next_xprt. This generates exactly one trace event when a ready xprt is found, rather than spurious events when there is no work to do. The empty events contain no information that can't be obtained simply by tracing function calls to svc_xprt_dequeue. A small additional benefit is simplification of the svc_xprt_event trace class, which no longer has to handle the case when the @xprt parameter is NULL. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> --- include/trace/events/sunrpc.h | 16 +++++----------- net/sunrpc/svc_xprt.c | 5 +---- 2 files changed, 6 insertions(+), 15 deletions(-) -- To unsubscribe from this list: send the line "unsubscribe linux-nfs" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html