From: David S. Miller <davem@davemloft.net>
Date: Sat, 11 Jun 2016 06:58:29 +0000 (-0700)
Subject: Merge branch 'remove-qdisc-throttle'
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=e69f73bfecb0178ae6bd20eb778211739cd71fab;p=linux-beck.git

Merge branch 'remove-qdisc-throttle'

Eric Dumazet says:

====================
net_sched: remove qdisc_is_throttled()

HTB, CBQ and HFSC pay a very high cost updating the qdisc 'throttled'
status that nothing but CBQ seems to use.

CBQ usage is flaky anyway, since no qdisc ->enqueue() updates the
'throttled' qdisc status.

This looks like some 'optimization' that actually cost more than code
without the optimization, and might cause latency issues with CBQ.

In my tests, I could achieve a 8 % performance increase in TCP_RR
workload through HTB qdisc, in presence of throttled classes,
and 5 % without throttled classes.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
---

e69f73bfecb0178ae6bd20eb778211739cd71fab