From: Mikael Abrahamsson <swmike@swm.pp.se>
To: Dave Taht <dave.taht@gmail.com>
Cc: Cake List <cake@lists.bufferbloat.net>,
Pete Heist <pete@heistp.net>,
cerowrt-devel@lists.bufferbloat.net
Subject: Re: [Cake] [Cerowrt-devel] apu2 sqm/htb issue + a minor win for speeding up fq_codel itself
Date: Fri, 5 Oct 2018 14:52:41 +0200 (CEST) [thread overview]
Message-ID: <alpine.DEB.2.20.1810051442300.4550@uplift.swm.pp.se> (raw)
In-Reply-To: <alpine.DEB.2.20.1810031728090.4550@uplift.swm.pp.se>
On Wed, 3 Oct 2018, Mikael Abrahamsson wrote:
> On Wed, 3 Oct 2018, Dave Taht wrote:
>
>> I *think*, but am not sure, this box could do a lot more prior to
>> this, but I never really tried. I'm off mostly debugging a babel
>> problem at the moment,
>
> I know for a fact that this box (WRT1200AC) did gigabit at MSS=400 one-way
> using fq_codel/cake before. I tested it a lot back then. Right now, I am
> using it as a 250/100 megabit/s machine, and it seems to spend a lot CPU
> doing that.
I did some new tests. Now I can't reproduce the problem.
I installed 18.06.1 and it'll do single TCP flow MSS 200 (-M 200 in
iperf3) at 550 megabit/s shown in iperf3, and 87% sirq shown in top on
WRT1200AC. When I set in/out speed at 800M and enable cake/layer_cake.qos
then performance drops to ~400 megabit/s with the same packet flow. So the
performance degradation is only around 20%, which I think is perfectly
acceptable. I get very similar results with fq_codel and simple.qos.
I also took some power meter readings, WRT1200AC idles as 9.2W and at full
CPU goes up to 10.4W.
--
Mikael Abrahamsson email: swmike@swm.pp.se
prev parent reply other threads:[~2018-10-05 12:52 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-09-04 19:59 [Cake] " Dave Taht
2018-09-04 21:14 ` Dave Taht
2018-09-04 21:16 ` Dave Taht
2018-09-06 17:51 ` Pete Heist
2018-09-06 18:03 ` Dave Taht
2018-10-03 13:56 ` [Cake] [Cerowrt-devel] " Mikael Abrahamsson
2018-10-03 14:44 ` Dave Taht
2018-10-03 14:45 ` Dave Taht
2018-10-03 15:30 ` Mikael Abrahamsson
2018-10-03 16:05 ` Dave Taht
2018-10-03 17:43 ` Toke Høiland-Jørgensen
2018-10-03 17:53 ` Dave Taht
2018-10-03 18:32 ` Jonathan Morton
2018-10-03 20:12 ` Toke Høiland-Jørgensen
2018-10-05 12:52 ` Mikael Abrahamsson [this message]
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