From: Reeted <reeted@shiftmail.org>
To: Chris Wright <chrisw@sous-sol.org>
Cc: "Daniel P. Berrange" <berrange@redhat.com>,
kvm@vger.kernel.org, libvir-list@redhat.com
Subject: Re: [libvirt] Qemu/KVM is 3x slower under libvirt
Date: Thu, 29 Sep 2011 12:16:33 +0200 [thread overview]
Message-ID: <4E844581.2000902@shiftmail.org> (raw)
In-Reply-To: <20110929003923.GC19141@sequoia.sous-sol.org>
On 09/29/11 02:39, Chris Wright wrote:
> Can you help narrow down what is happening during the additional 12
> seconds in the guest? For example, does a quick simple boot to single
> user mode happen at the same boot speed w/ and w/out vhost_net?
Not tried (would probably be too short to measure effectively) but I'd
guess it would be the same as for multiuser, see also the FC6 sub-thread
> I'm guessing (hoping) that it's the network bring-up that is slow.
> Are you using dhcp to get an IP address? Does static IP have the same
> slow down?
It's all static IP.
And please see my previous post, 1 hour before yours, regarding Fedora
Core 6: the bring-up of eth0 in Fedora Core 6 is not particularly faster
or slower than the rest. This is an overall system slowdown (I'd say
either CPU or disk I/O) not related to the network (apart from being
triggered by vhost_net).
next prev parent reply other threads:[~2011-09-29 10:17 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-09-27 18:10 Qemu/KVM is 3x slower under libvirt Reeted
2011-09-28 7:51 ` [libvirt] " Daniel P. Berrange
2011-09-28 9:19 ` Reeted
2011-09-28 9:28 ` Daniel P. Berrange
2011-09-28 9:49 ` Reeted
2011-09-28 9:53 ` [libvirt] Qemu/KVM is 3x slower under libvirt (due to vhost=on) Daniel P. Berrange
2011-09-28 10:19 ` Reeted
2011-09-28 10:29 ` Daniel P. Berrange
2011-09-28 12:56 ` Richard W.M. Jones
2011-09-28 14:51 ` Reeted
2011-09-28 23:27 ` Reeted
2011-09-29 0:39 ` [libvirt] Qemu/KVM is 3x slower under libvirt Chris Wright
2011-09-29 10:16 ` Reeted [this message]
2011-09-29 16:40 ` Chris Wright
2011-10-04 23:12 ` Qemu/KVM guest boots 2x slower with vhost_net Reeted
2011-10-04 23:12 ` [Qemu-devel] " Reeted
2011-10-09 21:47 ` Reeted
2011-10-09 21:47 ` [Qemu-devel] " Reeted
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