From mboxrd@z Thu Jan 1 00:00:00 1970 From: Dario Faggioli Subject: Re: Xen 4.2.2 / KVM / VirtualBox benchmark on Haswell Date: Thu, 11 Jul 2013 12:53:48 +0200 Message-ID: <1373540028.12772.31.camel@Solace> References: <51DC2BE3.7000009@xen.org> Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============2800437927466944773==" Return-path: In-Reply-To: List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xen.org Errors-To: xen-devel-bounces@lists.xen.org To: Gordan Bobic Cc: lars.kurth@xen.org, xen-devel@lists.xen.org List-Id: xen-devel@lists.xenproject.org --===============2800437927466944773== Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="=-JuvF/y/UNUVxbzyfddHg" --=-JuvF/y/UNUVxbzyfddHg Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable On mar, 2013-07-09 at 16:54 +0100, Gordan Bobic wrote: > The process migration overheads are _expensive_ > Indeed! > - I found that on bare > metal pining CPU/RAM intensive processes to cores made a ~20% > difference to overall throughput on a C2Q class CPU (no shared caches > between the two dies made it worse). I expect 4.3.x will be a > substantial improvement with NUMA awareness improvements to the > scheduler (looking forward to trying it this weekend). >=20 Well, yes, something good could be expected, although the actual improvement will depend on the number of involved VMs, their sizes, the workload they're running, etc. When I tried to use kernel compile as a benchmark for the NUMA effects, it did not turn out that useful to me (and that's why I switched to SpecJBB), but perhaps it was me that was doing something wrong... Anyway, if you do anything like this, please, do let us know here (and, please, Cc me :-P). Thanks and Regards, Dario --=20 <> (Raistlin Majere) ----------------------------------------------------------------- Dario Faggioli, Ph.D, http://about.me/dario.faggioli Senior Software Engineer, Citrix Systems R&D Ltd., Cambridge (UK) --=-JuvF/y/UNUVxbzyfddHg Content-Type: application/pgp-signature; name="signature.asc" Content-Description: This is a digitally signed message part Content-Transfer-Encoding: 7bit -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.13 (GNU/Linux) iEYEABECAAYFAlHejrwACgkQk4XaBE3IOsRVUwCfd0jZHO4lrfIP/s84hF0kngU5 6xsAnRVAQ4wncH6A9NyouqRK2ksww9CO =e2ag -----END PGP SIGNATURE----- --=-JuvF/y/UNUVxbzyfddHg-- --===============2800437927466944773== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org http://lists.xen.org/xen-devel --===============2800437927466944773==--