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Date: Mon, 12 Aug 2013 16:10:39 -0400 From: Vlad Yasevich <vyasevich@...il.com> To: Ben Greear <greearb@...delatech.com> CC: Eric Dumazet <eric.dumazet@...il.com>, netdev <netdev@...r.kernel.org> Subject: Re: SCTP performance? 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 -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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