From mboxrd@z Thu Jan  1 00:00:00 1970
From: David Cure <kvm@cure.nom.fr>
Subject: Re: performance trouble
Date: Wed, 21 Mar 2012 12:10:02 +0100
Message-ID: <20120321111001.GV12293@nfs-rbx.ovh.net>
References: <20120217140107.GA26955@nfs-rbx.ovh.net> <20120219091315.GA10038@redhat.com> <20120222163356.GE26955@nfs-rbx.ovh.net> <20120223083807.GA17505@redhat.com> <20120316101331.GM12293@nfs-rbx.ovh.net> <20120319105134.GA27928@redhat.com> <20120320093220.GS12293@nfs-rbx.ovh.net> <20120320094541.GH22368@redhat.com> <20120320111839.GT12293@nfs-rbx.ovh.net> <20120320123821.GL22368@redhat.com>
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Cc: Avi Kivity <avi@redhat.com>, kvm@vger.kernel.org,
	Vadim Rozenfeld <vrozenfe@redhat.com>
To: Gleb Natapov <gleb@redhat.com>
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		hello,

Le Tue, Mar 20, 2012 at 02:38:22PM +0200, Gleb Natapov ecrivait :
> 
> Try to add <feature policy='disable' name='hypervisor'/> to cpu
> definition in XML and check command line.

	ok I try this but I can't use <cpu model> to map the host cpu
(my libvirt is 0.9.8) so I use :

  <cpu match='exact'>
    <model>Opteron_G3</model>
    <feature policy='disable' name='hypervisor'/>
  </cpu>

	(the physical server use Opteron CPU).

	The log is here :
http://www.roullier.net/Report/report-3.2-vhost-net-1vcpu-cpu.txt.gz

	And now with only 1 vcpu, the response time is 8.5s, great
improvment. We keep this configuration for production : we check the
response time when some other users are connected.

	David.