kern/135222: [igb] low speed routing between two igb interfaces
freebsdusb at bindone.de
Fri Jun 12 09:50:03 UTC 2009
The following reply was made to PR kern/135222; it has been noted by GNATS.
From: Michael <freebsdusb at bindone.de>
To: Cc: freebsd-gnats-submit at FreeBSD.org
Subject: Re: kern/135222: [igb] low speed routing between two igb interfaces
Date: Fri, 12 Jun 2009 11:45:47 +0200
The original poster reported that the suggested fix works for him:
Thank you. It's working.
I consider it necessary to put this into the release errata.
Mishustin Andrew wrote:
>> Number: 135222
>> Category: kern
>> Synopsis: [igb] low speed routing between two igb interfaces
>> Confidential: no
>> Severity: serious
>> Priority: medium
>> Responsible: freebsd-bugs
>> State: open
>> Class: sw-bug
>> Submitter-Id: current-users
>> Arrival-Date: Wed Jun 03 18:30:01 UTC 2009
>> Originator: Mishustin Andrew
>> Release: FreeBSD 7.1-RELEASE amd64, FreeBSD 7.2-RELEASE amd64
> FreeBSD test.hnt 7.2-RELEASE FreeBSD 7.2-RELEASE #12: Thu Apr 30 18:28:15 MSD 20
> 09 admin at test.hnt:/usr/src/sys/amd64/compile/GENERIC amd64
> I made a FreeBSD multiprocesor server to act as simple gateway.
> It use onboard Intel 82575EB Dual-Port Gigabit Ethernet Controller.
> I observe traffic speed near 400 Kbit/s.
> I test both interfaces separately -
> ftp client work at speed near 1 Gbit/s in both directions.
> Then I change NIC to old Intel "em" NIC - gateway work at speed near 1 Gbit/s.
> Looks like a bug in igb driver have an effect upon forwarded traffic.
> If you try
> The speed is near 1 Mbit/s
> hw.igb.rxd, hw.igb.txd, "ifconfig -tso" has no effect.
> Nothing in messages.log
> netstat -m
> 516/1674/2190 mbufs in use (current/cache/total)
> 515/927/1442/66560 mbuf clusters in use (current/cache/total/max)
> 515/893 mbuf+clusters out of packet secondary zone in use (current/cache)
> 0/44/44/33280 4k (page size) jumbo clusters in use (current/cache/total/max)
> 0/0/0/16640 9k jumbo clusters in use (current/cache/total/max)
> 0/0/0/8320 16k jumbo clusters in use (current/cache/total/max)
> 1159K/2448K/3607K bytes allocated to network (current/cache/total)
> 0/0/0 requests for mbufs denied (mbufs/clusters/mbuf+clusters)
> 0/0/0 requests for jumbo clusters denied (4k/9k/16k)
> 0/0/0 sfbufs in use (current/peak/max)
> 0 requests for sfbufs denied
> 0 requests for sfbufs delayed
> 0 requests for I/O initiated by sendfile
> 0 calls to protocol drain routines
> I use only IPv4 traffic.
> On machine with two igb interfaces
> use rc.conf like this:
> ifconfig_igb0="inet 10.10.10.1/24"
> ifconfig_igb1="inet 10.10.11.1/24"
> And try create heavy traffic between two networks.
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