Date: Thu, 21 Jul 2011 10:14:09 -0400 From: "Michael W. Lucas" <mwlucas@blackhelicopters.org> To: Jack Vogel <jfvogel@gmail.com> Cc: freebsd-net@freebsd.org, Steven Hartland <killing@multiplay.co.uk> Subject: Re: kern/152828: [em] poor performance on 8.1, 8.2-PRE Message-ID: <20110721141409.GC47190@bewilderbeast.blackhelicopters.org> In-Reply-To: <CAFOYbckYazC0D4qjK__vv5eGOE_y01qYWgY4T5zz%2BET=ru1ORg@mail.gmail.com> References: <201107201550.p6KFo9rH032569@freefall.freebsd.org> <54AEE240C5F8411A9D4274605DBD14BC@multiplay.co.uk> <CAFOYbckYazC0D4qjK__vv5eGOE_y01qYWgY4T5zz%2BET=ru1ORg@mail.gmail.com>
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Jack, After a second reading: is my problem a known em problem? As in, should I stop chasing other possibilities and wait for a solution? Thanks, ==ml On Wed, Jul 20, 2011 at 09:38:53AM -0700, Jack Vogel wrote: > This is an em bug, igb does not share interrupt code with em, furthermore > the adapter > the filer of the bug is using doesn't use MSIX, only one type in the em > driver does, > and I might add lots of heavy users on that adapter have MSIX on without > issues. > > I believe turning MSIX off is just masking whatever your real issue is, if > you wish to > run that way that's fine, but please don't advertise that as a 'fix' in some > general way. > > Regards, > > Jack > > > On Wed, Jul 20, 2011 at 9:07 AM, Steven Hartland <killing@multiplay.co.uk>wrote: > > > We're seeing tcp stalls under igb under 8.2-RELEASE and 8-STABLE (which > > shares > > some code with em) and the workaround for use is currently adding the > > following > > to /boot/loader.conf > > hw.igb.enable_msix=0 > > > > Might be worth trying that. > > > > Regards > > Steve > > > > ----- Original Message ----- From: "Michael W. Lucas" < > > mwlucas@blackhelicopters.org> > > To: <freebsd-net@FreeBSD.org> > > Sent: Wednesday, July 20, 2011 4:50 PM > > > > Subject: Re: kern/152828: [em] poor performance on 8.1, 8.2-PRE > > > > > > The following reply was made to PR kern/152828; it has been noted by > >> GNATS. > >> > >> From: "Michael W. Lucas" <mwlucas@blackhelicopters.org> > >> To: bug-followup@FreeBSD.org > >> Cc: rick@sloservers.com > >> Subject: Re: kern/152828: [em] poor performance on 8.1, 8.2-PRE > >> Date: Wed, 20 Jul 2011 11:49:08 -0400 > >> > >> I'm seeing the exact same problem here as the original poster. Is > >> anybody looking at this? > >> > >> Running FreeBSD 8.2-RELEASE-p1 amd64, from FreeNAS 8.0 > >> > >> sysctls: > >> dev.em.0.%desc: Intel(R) PRO/1000 Network Connection 7.1.9 > >> dev.em.0.%driver: em > >> dev.em.0.%location: slot=0 function=0 > >> dev.em.0.%pnpinfo: vendor=0x8086 device=0x108b subvendor=0x8086 > >> subdevice=0x0000 class=0x020000 > >> dev.em.0.%parent: pci1 > >> dev.em.0.nvm: -1 > >> dev.em.0.debug: -1 > >> ... > >> > >> ifconfig: > >> em0: flags=8843<UP,BROADCAST,**RUNNING,SIMPLEX,MULTICAST> metric 0 mtu > >> 1500 > >> options=219b<RXCSUM,TXCSUM,**VLAN_MTU,VLAN_HWTAGGING,VLAN_** > >> HWCSUM,TSO4,WOL_MAGIC> > >> ether 00:15:17:31:c8:fe > >> inet 139.171.199.13 netmask 0xffffff00 broadcast 139.171.199.255 > >> media: Ethernet autoselect (1000baseT <full-duplex>) > >> status: active > >> > >> dmesg | grep em0 > >> em0: <Intel(R) PRO/1000 Network Connection 7.1.9> port 0xbc00-0xbc1f mem > >> 0xff6e0000-0xff6fffff irq 16 at device 0.0 on pci1 > >> em0: Using an MSI interrupt > >> em0: [FILTER] > >> em0: Ethernet address: 00:15:17:31:c8:fe > >> > >> > >> > >> > >> -- > >> Michael W. Lucas http://www.MichaelWLucas.com/, > >> http://blather.MichaelWLucas.**com/ <http://blather.MichaelWLucas.com/>; > >> Latest book: Network Flow Analysis http://www.**networkflowanalysis.com/<http://www.networkflowanalysis.com/>; > >> mwlucas@BlackHelicopters.org, Twitter @mwlauthor > >> ______________________________**_________________ > >> freebsd-net@freebsd.org mailing list > >> http://lists.freebsd.org/**mailman/listinfo/freebsd-net<http://lists.freebsd.org/mailman/listinfo/freebsd-net>; > >> To unsubscribe, send any mail to "freebsd-net-unsubscribe@**freebsd.org<freebsd-net-unsubscribe@freebsd.org> > >> " > >> > >> > > ==============================**================== > > 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<http://lists.freebsd.org/mailman/listinfo/freebsd-net>; > > To unsubscribe, send any mail to "freebsd-net-unsubscribe@**freebsd.org<freebsd-net-unsubscribe@freebsd.org> > > " > > -- Michael W. Lucas http://www.MichaelWLucas.com/, http://blather.MichaelWLucas.com/ Latest book: Network Flow Analysis http://www.networkflowanalysis.com/ mwlucas@BlackHelicopters.org, Twitter @mwlauthor
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