From: Fabian Deutsch <fabian.deutsch@gmx.de>
To: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: kvm@vger.kernel.org
Subject: Re: Network poblems using virtio and tap.
Date: Sat, 06 Sep 2008 14:04:30 +0200 [thread overview]
Message-ID: <1220702670.2932.6.camel@decade.local> (raw)
In-Reply-To: <200809060940.27765.borntraeger@de.ibm.com>
Am Samstag, den 06.09.2008, 09:40 +0200 schrieb Christian Borntraeger:
> Am Montag, 1. September 2008 schrieb Fabian Deutsch:
> > Hey.
> >
> > I'm observing some network problems when using virtio and a tap if.
> > The trouble is a drop of network troughput from abot 90Mbit/s to
about
> 90kbit/s,
> > after about 1.7 TB of transferred data.
> >
> > Setup
> > Host:
> > - Fedora 8, nearly all updates
> > - Intel(R) Xeon(R) CPU X3210 @ 2.13GHz
> > - 8GB RAM
> > - 2 Guests
> >
> > Guest:
> > - Fedora 9 all updates
> > - virtio nic using tap
> > - samba sharing a mountpoint using an iscsi target
>
> Can you tell us what host kernel and what guest kernel you are using?
The were
> some changes to tun/tap for virtio lately which could make a
difference.
Host:
Fedora 8 x86_64
2.6.25.14-69.fc8 SMP
kvm-72
Guest:
Fedora 9 i386
2.6.25.11-97.fc9.i686
Greetings
- fabian
next prev parent reply other threads:[~2008-09-06 12:04 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-09-01 12:42 Network poblems using virtio and tap Fabian Deutsch
2008-09-05 11:47 ` Fabian Deutsch
2008-09-06 7:40 ` Christian Borntraeger
2008-09-06 12:04 ` Fabian Deutsch [this message]
2008-09-06 12:26 ` richard lucassen
2008-09-06 13:47 ` Fabian Deutsch
2008-09-06 15:34 ` richard lucassen
2008-09-07 20:05 ` richard lucassen
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