Date: Mon, 18 Jul 2011 09:40:45 -0700 From: Jack Vogel <jfvogel@gmail.com> To: Steven Hartland <killing@multiplay.co.uk> Cc: freebsd-net@freebsd.org, Kevin Oberman <kob6558@gmail.com> Subject: Re: igb enable_aim or flow_control causing tcp stalls? Message-ID: <CAFOYbc=2RyTM_SbQt_v96HL_bSwFPmiJqW--tWJUx1x_jM3ffQ@mail.gmail.com> In-Reply-To: <CEE01EEE7538428F8CB9A764CF0EFFFA@multiplay.co.uk> References: <379885BA631F4C7787C24E00A174B429@multiplay.co.uk> <CAN6yY1s=o=Fd5mgkjrPPqeKmtCXVeDbFrEUqJZk85ccBBa2X4Q@mail.gmail.com> <CEE01EEE7538428F8CB9A764CF0EFFFA@multiplay.co.uk>
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I have no idea... but as a matter of principle I would see if updating to later code, both OS and especially the driver, reproduces the issue. Our validation group often has Linux as a link partner in testing, which can be good and bad, it actually sometimes has problems that FBSD on both sides doesn't. Jack On Mon, Jul 18, 2011 at 4:20 AM, Steven Hartland <killing@multiplay.co.uk>wrote: > ----- Original Message ----- From: "Kevin Oberman" <kob6558@gmail.com> > >> >> Use "tcpdump -s0 -w file.pcap host remote-system" to see how it fails. You >> may want to capture on both ends. Then use wireshark (in ports) to analyze >> the data. >> >> There are other tools to provide other types of analysis, depending on the >> type of problem. >> > > I've managed to get a capture from both ends but its doesn't really make > too > much sense to me. You can clearly see the stall which starts at the 2.1 > second > mark, and recovers at the 65 second mark but what's causing it is a > mystery. > > I've attached what I believe is the relevant a snippet from each trace. > > At this point I believe I've eliminated aim and flow_control as these where > both off when this test was preformed > > Any advice would be appreciated. > > The layout for this test was:- > Source (7.0-RELEASE-p2 on em0) -> Cisco 6509 -> supermicro blade -> Target > (8.2-RELEASE on igb0) > > I'm going to try and eliminate the Cisco next by going from two blades > on the local supermicro blade switch. > > Regards > Steve > > > > ==============================**================== > This e.mail is private and confidential between Multiplay (UK) Ltd. and the > person or entity to whom it is addressed. In the event of misdirection, the > recipient is prohibited from using, copying, printing or otherwise > disseminating it or any information contained in it. > In the event of misdirection, illegible or incomplete transmission please > telephone +44 845 868 1337 > or return the E.mail to postmaster@multiplay.co.uk. > _______________________________________________ > 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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