Date: Wed, 20 Jul 2011 17:07:53 +0100 From: "Steven Hartland" <killing@multiplay.co.uk> To: "Michael W. Lucas" <mwlucas@blackhelicopters.org>, <freebsd-net@FreeBSD.org> Subject: Re: kern/152828: [em] poor performance on 8.1, 8.2-PRE Message-ID: <54AEE240C5F8411A9D4274605DBD14BC@multiplay.co.uk> References: <201107201550.p6KFo9rH032569@freefall.freebsd.org>
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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/
> Latest book: Network Flow Analysis http://www.networkflowanalysis.com/
> mwlucas@BlackHelicopters.org, Twitter @mwlauthor
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