Date: Mon, 14 May 2012 15:50:58 +0530 From: vansi wow <vansiwow@gmail.com> To: Michael Tuexen <Michael.Tuexen@lurchi.franken.de> Cc: freebsd-net@freebsd.org Subject: Re: Regarding SCTP performance Message-ID: <CAEsa=O2znE_KO2xM2ytX_wQK_YYgtj02JkWca90kjvgr4_PLOw@mail.gmail.com> In-Reply-To: <EC9863CC-3EB5-411F-9A92-1825AA34430E@lurchi.franken.de> References: <CAEsa=O2Fa1u0BJ3nvHsskWxs=fV3r3jXz6dTZ7xUAtvRtXQ0cg@mail.gmail.com> <8A60952E-4300-497B-9101-CEA952026F24@lurchi.franken.de> <CAEsa=O1SJtXgdvB=YDs626QeAwo6rN3G1Ued7=-=mxbcBL67EA@mail.gmail.com> <EC9863CC-3EB5-411F-9A92-1825AA34430E@lurchi.franken.de>
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Hi Michael,
Thanks for your inputs . Will provide the pcap tracefile
offlist .
Regards,
Vamshi
On Mon, May 14, 2012 at 3:15 PM, Michael Tuexen <
Michael.Tuexen@lurchi.franken.de> wrote:
> 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"
> > >
> >
> >
>
>
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