From: Valtteri Kiviniemi <valtteri.kiviniemi@dataproof.fi>
To: Christophe Saout <christophe@saout.de>
Cc: "xen-devel@lists.xensource.com" <xen-devel@lists.xensource.com>
Subject: Re: Strange lag with pv_ops dom0 kernel
Date: Wed, 20 May 2009 05:06:41 +0300 [thread overview]
Message-ID: <4A1365B1.2090101@dataproof.fi> (raw)
In-Reply-To: <1242778985.4384.1.camel@leto.intern.saout.de>
Hi,
I dont think that's the case because the nic is autonegotiation the link
and in dmesg I can see right after boot:
eth0: Link is Up 100 Mbps Full Duplex, Flow Control: None
eth0: 10/100 speed: disabling TSO
- Valtteri Kiviniemi
Christophe Saout kirjoitti:
> Hi Valtteri,
>
>> I'm testing the 2.6.30-rc3-tip pv_ops kernel with Xen 3.4 (also tried
>> 2.6.30-rc5-tip) and everything is working fine except domU performance.
>>
>> domU's boot up quickly but theres some strange lag. For example just
>> typing "ps aux" or "dmesg" takes 5-10 seconds to finish. Load averages
>> are 0 and cpu-usage reported by xentop is minimal. Theres also no
>> indication of io-wait.
>
> This sounds like the known issue with Dom0 bouncing TSO packets. It
> should go away once you disable TSO in your DomU's:
>
> /usr/sbin/ethtool -K eth0 tso off
>
>
> Christophe
>
>
next prev parent reply other threads:[~2009-05-20 2:06 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-05-18 12:26 [ANNOUNCE] Xen 3.4.0 released! Keir Fraser
2009-05-18 16:19 ` Valtteri Kiviniemi
2009-05-19 3:25 ` wei zhou
2009-05-19 3:32 ` Yi, Shunli
2009-05-19 4:25 ` [Xen-devel] " Keir Fraser
2009-05-19 7:53 ` wei zhou
2009-05-19 11:56 ` Stefano Stabellini
2009-05-19 16:06 ` [Xen-devel] " Ian Jackson
2009-05-19 17:36 ` Ian Jackson
2009-05-19 17:51 ` Re: [Xen-devel] " Dustin Henning
2009-05-19 17:51 ` [Xen-users] " Dustin Henning
[not found] ` <m2n.s.1M6Wut-002Sa1@chiark.greenend.org.uk>
2009-05-20 11:22 ` Ian Jackson
2009-05-19 0:45 ` Mark Johnson
2009-05-19 0:51 ` Keir Fraser
2009-05-19 1:23 ` zen
2009-05-19 1:34 ` Strange lag with pv_ops dom0 kernel Valtteri Kiviniemi
2009-05-19 1:58 ` Valtteri Kiviniemi
2009-05-19 23:39 ` Jeremy Fitzhardinge
2009-05-20 2:04 ` Valtteri Kiviniemi
2009-05-20 0:23 ` Christophe Saout
2009-05-20 2:06 ` Valtteri Kiviniemi [this message]
2009-05-20 7:18 ` Christophe Saout
2009-05-20 23:22 ` Valtteri Kiviniemi
2009-05-23 13:36 ` Valtteri Kiviniemi
2009-05-24 23:48 ` Debian unstable (sid) domU crashes dom0 on startup with pv_ops kernel Valtteri Kiviniemi
2009-05-24 23:56 ` Valtteri Kiviniemi
2009-05-25 1:51 ` Valtteri Kiviniemi
2009-05-25 20:29 ` Valtteri Kiviniemi
2009-05-27 22:49 ` Jeremy Fitzhardinge
2009-05-28 18:10 ` Valtteri Kiviniemi
2009-05-19 1:42 ` [ANNOUNCE] Xen 3.4.0 released! Keir Fraser
2009-05-19 2:39 ` zen
2009-05-20 1:04 ` Dirk Utterback
2009-05-20 5:44 ` Keir Fraser
2009-05-19 16:56 ` Li, Xin
2009-05-19 17:04 ` [Xen-devel] " Pasi Kärkkäinen
2009-05-19 22:21 ` Keir Fraser
2009-05-20 6:44 ` Pasi Kärkkäinen
2009-05-20 12:13 ` [Xen-devel] " Keir Fraser
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