From: Eric Dumazet <edumazet@google.com>
Date: Wed, 28 Sep 2016 13:23:15 +0000 (-0700)
Subject: tc: fq: display unthrottle latency
X-Git-Tag: v4.9.0~69
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=39f8caeb96ee123fcacd9281139da076d6117b16;p=thirdparty%2Fiproute2.git

tc: fq: display unthrottle latency

In linux-4.9 fq packet scheduler got a new stat :

unthrottle_latency in nano second units.

Gives a good indication of system load or timer implementation
latencies.

Signed-off-by: Eric Dumazet <edumazet@google.com>
---

diff --git a/tc/q_fq.c b/tc/q_fq.c
index 90147a6aa..c9efbfc43 100644
--- a/tc/q_fq.c
+++ b/tc/q_fq.c
@@ -312,6 +312,9 @@ static int fq_print_xstats(struct qdisc_util *qu, FILE *f,
 
 	fprintf(f, ", %llu throttled", st->throttled);
 
+	if (st->unthrottle_latency_ns)
+		fprintf(f, ", %u ns latency", st->unthrottle_latency_ns);
+
 	if (st->flows_plimit)
 		fprintf(f, ", %llu flows_plimit", st->flows_plimit);