Date: Thu, 9 Jun 2011 13:29:54 -0400 From: Arnaud Lacombe <lacombar@gmail.com> To: Mario Spinthiras <spinthiras.mario@gmail.com> Cc: freebsd-net@freebsd.org Subject: Re: strange igb interface performance problems Message-ID: <BANLkTi=OuCv19w8hwGQ7%2BcYLrQ%2BZxAoM2A@mail.gmail.com> In-Reply-To: <BANLkTikH6PiXU9PUF9nS-jA8jhM0ozyHfw@mail.gmail.com> References: <BANLkTikH6PiXU9PUF9nS-jA8jhM0ozyHfw@mail.gmail.com>
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Hi, On Thu, Jun 9, 2011 at 11:53 AM, Mario Spinthiras <spinthiras.mario@gmail.com> wrote: > Hello All, > > =A0The subject topic might catch a few by surprise because for the most p= art > it smells a lot like a problem that came to light in 2009 regarding bad > performance on Intel NICs using the igb driver. > > =A0I currently have a point to point link between 2 pfsense 2.0RC1 runnin= g > FreeBSD 8.1 that connect via a 1Gbps link. The link itself has been teste= d > and the provider reckons that the link is fine. (I also believe this too)= . > What kind of link What RTT ? > We then started high and went low to search for the problem. We ditched o= ut > the media converters, went on a mad mission to tune every single last det= ail > on the stack to give us the full performance, however on the 1Gbps line w= e > see a rough 20Mbps. > What kind of traffic ? from your later comment, I'd assume TCP. What about = UDP ? > We then turned towards the igb driver which smells a little funny > considering that the issues I mentioned that have emerged back in 2009 > regarding similar issues are alive and well today. > Could you details those trouble ? 2 years is certainly a very long time, especially for people who were not on the list then. > Does anyone out there have any experience or knowledge of such problems > caused by the igb driver? I'm going to plan a maintenance window on this > link within the next day or so hoping that I'll be able to live boot a 2.= 0 > RC1 nightly and try it again. The current RC1 is one of the earlier ones. > > Any info you can send my way on this baffling mystery that has taken me o= n a > goose chase. Disabling TSO/LRO does not solve the problem for me. Can any= one > shed some light on this? > Can you at least post some information on the system, relevant part of 'dmesg', 'ifconfig -a' and 'pciconf -l', 'netstat -m', 'sysctl dev.igb' after the test, Thanks, - Arnaud > > Thanking you all in advance, > > Mario > _______________________________________________ > 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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