Date: Mon, 14 May 2012 11:45:46 +0200 From: Michael Tuexen <Michael.Tuexen@lurchi.franken.de> To: vansi wow <vansiwow@gmail.com> Cc: freebsd-net@freebsd.org Subject: Re: Regarding SCTP performance Message-ID: <EC9863CC-3EB5-411F-9A92-1825AA34430E@lurchi.franken.de> In-Reply-To: <CAEsa=O1SJtXgdvB=YDs626QeAwo6rN3G1Ued7=-=mxbcBL67EA@mail.gmail.com> References: <CAEsa=O2Fa1u0BJ3nvHsskWxs=fV3r3jXz6dTZ7xUAtvRtXQ0cg@mail.gmail.com> <8A60952E-4300-497B-9101-CEA952026F24@lurchi.franken.de> <CAEsa=O1SJtXgdvB=YDs626QeAwo6rN3G1Ued7=-=mxbcBL67EA@mail.gmail.com>
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On May 14, 2012, at 11:39 AM, vansi wow wrote: > Hi Michael, > Since we use NetBSD 3.0 on the router, the SCTP stack code is ported to NetBSD 3.0 with some tweaks for the mips platform. > There are no packet loss , since for testing ,we hosted both client and server on the same router . The CPU Load is very minimal since its just a echo application for the test. > > are there any performance related fixes in the new source which helps the throughput. Hi Vamshi, there is a huge number of bugfixes... We keep the SCTP sources of stable/8, stable/9 and CURRENT in sync (as much as possible). Some of the bugs do affect the performance. If it is possible, you can send me a .pcap tracefile (you can send it off-list) and I will have a look. Maybe it is possible to guess what is going on. Best regards Michael > > Regards, > Vamshi > > > > On Mon, May 14, 2012 at 2:14 PM, Michael Tuexen <Michael.Tuexen@lurchi.franken.de> wrote: > On May 14, 2012, at 12:21 AM, vansi wow wrote: > > > Hi All, > > we have ported SCTP from FreeBSD 7.0 tree , but we face the > Hi Vamshi, > > I would recommend to use more recent sources... There has been a huge > number of bug fixes been committed. BTW: What exactly does "porting" > mean? What system are you using? > > > > issue that when we measure the throughput performance of the stack , we see > > that SCTP throughput is half that of the TCP throughput . > > > > Is there some tuning which can be done or some tweaks which can help > > improve the performance . > > > > > > > > > TCP : > > ===== > > SO_SNDBUF = 32768 > > SO_RCVBUF = 32768 > > Throughput: 5653KB/s > > > > > > SCTP: > > ====== > > SNDBUF = 838860 > > RCVBUF = 838860 > > Throughput = 2422 KB/s > Without any another information it is hard to say what is limiting the transfer. > Do you have any packet loss? What is the CPU load when doing the transfer? > FreeBSD 7 does not support CRC offloading... > > Best regards > Michael > > > > Regards, > > Vamshi > > _______________________________________________ > > freebsd-net@freebsd.org mailing list > > http://lists.freebsd.org/mailman/listinfo/freebsd-net > > To unsubscribe, send any mail to "freebsd-net-unsubscribe@freebsd.org" > > > >help
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