From: Vlad Yasevich <vyasevich@gmail.com>
To: Ben Greear <greearb@candelatech.com>
Cc: Eric Dumazet <eric.dumazet@gmail.com>, netdev <netdev@vger.kernel.org>
Subject: Re: SCTP performance?
Date: Mon, 12 Aug 2013 16:10:39 -0400 [thread overview]
Message-ID: <5209413F.7090802@gmail.com> (raw)
In-Reply-To: <520583AB.9030509@candelatech.com>
On 08/09/2013 08:04 PM, Ben Greear wrote:
> On 08/09/2013 04:21 PM, Eric Dumazet wrote:
>> On Fri, 2013-08-09 at 16:11 -0700, Ben Greear wrote:
>>> I just added some support for SCTP to my traffic-generator tool.
>>>
>>> I tried to send 1Gbps of traffic, bi-directional, across two
>>> 10G interfaces. TCP does this without any trouble at all,
>>> but SCTP was asymetric and never got above around 700Mbps,
>>> and was usually stuck at < 500Mbps.
>>>
>>> perf top didn't show any obvious CPU bottlenecks.
>>>
>>> Has anyone done any recent performance testing with SCTP?
>>>
>>> I'd be interested to know the results if so...
>>
>> You mean there is no SCTP offload on the NIC and/or GRO, yes that's too
>> bad.
>>
>
> I'm sure that is part of the problem.
>
> I got much better results when I explicitly set the
> tx/rx socket buffer sizes to 2MB, so maybe it just sucks
> at auto-tuning it's socket buffer sizes.
>
> Thanks,
> Ben
>
There is no buffer autotunning. There is also no GRO since SCTP doesn't
lend itself easily to GRO. :(
There has been some research efforts at autotunning, but nothing
proposed. I'll see if I can find the code and make it work better.
-vlad
prev parent reply other threads:[~2013-08-12 20:10 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-08-09 23:11 SCTP performance? Ben Greear
2013-08-09 23:21 ` Eric Dumazet
2013-08-10 0:04 ` Ben Greear
2013-08-10 0:54 ` David Miller
2013-08-12 20:10 ` Vlad Yasevich [this message]
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