From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([208.118.235.92]:48027) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1UBQdv-0002It-VG for qemu-devel@nongnu.org; Fri, 01 Mar 2013 09:09:01 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1UBQdu-0000nn-SF for qemu-devel@nongnu.org; Fri, 01 Mar 2013 09:08:59 -0500 Received: from mx1.redhat.com ([209.132.183.28]:15865) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1UBQdu-0000nh-Iv for qemu-devel@nongnu.org; Fri, 01 Mar 2013 09:08:58 -0500 Message-ID: <5130B677.1060604@redhat.com> Date: Fri, 01 Mar 2013 07:08:55 -0700 From: Eric Blake MIME-Version: 1.0 References: <5130ADC0.9070402@dlhnet.de> <5130B29C.3060301@redhat.com> <5130B5D8.7030308@dlhnet.de> In-Reply-To: <5130B5D8.7030308@dlhnet.de> Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="----enig2TFEHIAOLKRQCLRSHIAUI" Subject: Re: [Qemu-devel] [PATCH] migration: use XBZRLE only after bulk stage List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Peter Lieven Cc: Orit Wasserman , "qemu-devel@nongnu.org" , Paolo Bonzini This is an OpenPGP/MIME signed message (RFC 4880 and 3156) ------enig2TFEHIAOLKRQCLRSHIAUI Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable On 03/01/2013 07:06 AM, Peter Lieven wrote: >> Do you have any benchmark numbers? At any rate, the explanation seems= >> sound, so a benchmark should show this. >=20 > Do you have a particular test pattern in mind? If there is nothing goin= g on > in the VM XBZRLE will not be better than normal copy at all. >=20 > Otherwise you will have N xbzrle misses and 0 xbzrle pages without the > patch > and 0 xbzrle misses and 0 xbzrle pages with the patch. How about a migration of a guest running the synthetic r/w load generator in docs/xbzrle.txt? --=20 Eric Blake eblake redhat com +1-919-301-3266 Libvirt virtualization library http://libvirt.org ------enig2TFEHIAOLKRQCLRSHIAUI Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.13 (GNU/Linux) Comment: Public key at http://people.redhat.com/eblake/eblake.gpg Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iQEcBAEBCAAGBQJRMLZ3AAoJEKeha0olJ0NqbBQH/09GllROUC2gQcWxy14PKT+B j8Jb2gkKqMmVuYfJM6nR5EVWoZE4/UOneBRuxDK/a6RImOsaV6RXRzS+mZ9fMAQi KPsaVcUg5+Ic005Pnn9q+p+l/HSVeaWpOYZGXhsy6TLFfeE1B/4zZTT66us72Mf2 tAzRh5AZ+6+SB5fQob0/w0xjHMlQkzMzs35NeFfw9cK8ljA4Lv6X2SEdGlFN3i8+ fV+GReKVFpNQ4ApBx7TEtKKsxmOc4IappH7X2gNK3eQ1sKmMP8P+wysQ733grOvS pLF+b5qVWugLC+NVEmbmZEhD7oPlZ7jXFU4RD5tSUr8DxdEVmikz7xnCFGLeAys= =d9Ts -----END PGP SIGNATURE----- ------enig2TFEHIAOLKRQCLRSHIAUI--