[Bloat] [Cerowrt-devel] performance numbers from WRT1200AC (Re: Latest build test - new sqm-scripts seem to work; "cake overhead 40" didn't) (fwd)

[Mikael Abrahamsson]

FYI in case some aren't on the cerowrt-devel ml.

---------- Forwarded message ----------
Date: Tue, 23 Jun 2015 14:55:30 +0200 (CEST)
From: Mikael Abrahamsson <swmike at swm.pp.se>
To: cerowrt-devel <cerowrt-devel at lists.bufferbloat.net>
Subject: [Cerowrt-devel] performance numbers from WRT1200AC (Re: Latest build
     test - new sqm-scripts seem to work; "cake overhead 40" didn't)

On Tue, 23 Jun 2015, Sebastian Moeller wrote:

> 	Most likely not. Check http://wiki.openwrt.org/doc/howto/sqm . Rich 
> published a great set of instructions for setting up sqm-scripts under 
> openwrt proper.

I tried it on Linksys WRT1200AC with OpenWrt CC RC2. I configured sqm to have 
800 megabit/s each direction, and ran iperf3 over IPv4 with NAT44 from Linux 
box behind WRT1200AC to an OSX macbook connected on a switch on the same L2 
subnet as the WAN port.

Linux <->WRT1200AC<->switch<->OSX

I get 765 megabit/s of throughput using single session, at sirq load of around 
25%. If I lower the mss to 300 (to generate higher pps) I get around 560 
megabit/s of throughput at 50% sirq. With 10 parallel TCP sessions, I get about 
the same. At MSS of 200 bytes, I get 400 megabit/s at 70% sirq.

If I turn off SQM completely, I get 600 megabit/s at 200 byte MSS single 
session at 80% sirq and 930 megabit/s at 26% sirq with default MSS.

So if you want high performing device that is OpenWRT compatible and still does 
forwarding using CPU so you can test queuing algorithms, the WRT1200AC and 
WRT1900ACv2 is the best I have been able to find currently (unless you go for 
x86 platform).

-- 
Mikael Abrahamsson    email: swmike at swm.pp.se
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