Date: Wed, 20 Jul 2011 10:03:47 -0700 From: Jack Vogel <jfvogel@gmail.com> To: Steven Hartland <killing@multiplay.co.uk> Cc: freebsd-net@freebsd.org, "Michael W. Lucas" <mwlucas@blackhelicopters.org> Subject: Re: kern/152828: [em] poor performance on 8.1, 8.2-PRE Message-ID: <CAFOYbcmESebwjdksujKefyCzRey3g6PV1h5fruiY9GFohSwFiw@mail.gmail.com> In-Reply-To: <2976D84B193E4D7DAE6F4C4E28B8F909@multiplay.co.uk> References: <201107201550.p6KFo9rH032569@freefall.freebsd.org> <54AEE240C5F8411A9D4274605DBD14BC@multiplay.co.uk> <CAFOYbckYazC0D4qjK__vv5eGOE_y01qYWgY4T5zz%2BET=ru1ORg@mail.gmail.com> <2976D84B193E4D7DAE6F4C4E28B8F909@multiplay.co.uk>
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Did you eliminate that 7.0 box as part of the issue? Meaning switch to say a Linux or 8.2 partner to see if the problem persists or stops? Cheers, Jack On Wed, Jul 20, 2011 at 10:02 AM, Steven Hartland <killing@multiplay.co.uk>wrote: > ** > Apologies, thought it might be worth a shot, but clearly not thanks for > clarifying :) > > You absolutely correct with the msix masking the issue, we've just this > minute had it stall again even with MSIX disabled :( > > I agree we have many machines using igb and em without issue even under > lots of load. > > Not wishing to hijack this thread, but any advise on what else to try to > diagnose this stalling issue would be gratefully received. > > Regards > Steve > > ----- Original Message ----- > *From:* Jack Vogel <jfvogel@gmail.com> > *To:* Steven Hartland <killing@multiplay.co.uk> > *Cc:* Michael W. Lucas <mwlucas@blackhelicopters.org> ; > freebsd-net@freebsd.org > *Sent:* Wednesday, July 20, 2011 5:38 PM > *Subject:* Re: kern/152828: [em] poor performance on 8.1, 8.2-PRE > > 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 <%2B44%20845%20868%201337> >> 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> >> " >> > > > ================================================ > 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. >
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