From mboxrd@z Thu Jan 1 00:00:00 1970 From: Dario Faggioli Subject: Re: PV-vNUMA issue: topology is misinterpreted by the guest Date: Wed, 29 Jul 2015 09:09:31 +0200 Message-ID: <1438153771.16912.1.camel@citrix.com> References: <1437042762.28251.18.camel@citrix.com> <55A7D17C.5060602@citrix.com> <55A7D2CC.1050708@oracle.com> <55A7F7F40200007800092152@mail.emea.novell.com> <55A7DE45.4040804@citrix.com> <55A7E2D8.3040203@oracle.com> <55A8B83802000078000924AE@mail.emea.novell.com> <1437118075.23656.25.camel@citrix.com> <55A946C6.8000002@oracle.com> <1437401354.5036.19.camel@citrix.com> <55AD08F7.7020105@oracle.com> <55AEA4DD.7080406@oracle.com> <1437572160.5036.39.camel@citrix.com> <55AF9F8F.7030200@suse.com> <55AFA16B.3070103@oracle.com> <55AFA41E.1080101@suse.com> <55AFAC34.1060606@oracle.com> <55B070ED.2040200@suse.com> <1437660433.5036.96.camel@citrix.com> <55B21364.5040906@suse.com> <1437749076.4682.47.camel@citrix.com> <55B25650.4030402@suse.com> <55B258C9.4040400@suse.com> <1437753509.4682.78.camel@citrix.com> <55B26377.4060807@suse.com> <1438006166.5036.156.camel@citrix.com> <55B7052F.8090804@suse.com> <55B79B9C.6030505@suse.com> <1438100238.2889.135.camel@citrix.com> <55B86CDD.1060803@suse.com> Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============6464741517607210620==" Return-path: Received: from mail6.bemta14.messagelabs.com ([193.109.254.103]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1ZKLUk-0000U4-CR for xen-devel@lists.xenproject.org; Wed, 29 Jul 2015 07:09:42 +0000 In-Reply-To: <55B86CDD.1060803@suse.com> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xen.org Errors-To: xen-devel-bounces@lists.xen.org To: Juergen Gross Cc: Elena Ufimtseva , Wei Liu , Andrew Cooper , David Vrabel , Jan Beulich , "xen-devel@lists.xenproject.org" , Boris Ostrovsky List-Id: xen-devel@lists.xenproject.org --===============6464741517607210620== Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="=-ziWatrK++DeI4IwAXdMQ" --=-ziWatrK++DeI4IwAXdMQ Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable On Wed, 2015-07-29 at 08:04 +0200, Juergen Gross wrote: > On 07/28/2015 06:17 PM, Dario Faggioli wrote: > >> On 07/28/2015 06:29 AM, Juergen Gross wrote: > > > >>> I'll make some performance tests on a big machine (4 sockets, 60 core= s, > >>> 120 threads) regarding topology information: > >>> > > I'm asking this because, with hyperthreading involved, I've sometimes > > seen things being the worse when *not* (over)saturating the CPU > > capacity. >=20 > Hmm, oversaturation shouldn't happen here. I've added -j 240 to let it > happen. >=20 Oh, sorry... I was doing the math wrong (I was not counting the threads, which is funny, as this is pretty much all about threads! :-O) > I think I'll have another try with a domU. This could be much more > "random" than dom0. >=20 Indeed! 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) --=-ziWatrK++DeI4IwAXdMQ 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 v2 iEYEABECAAYFAlW4fCsACgkQk4XaBE3IOsSoWQCfQJmbvB37IG3FhcGJoVSUfwAT MQUAnRSQ9g6on9J/tMmBuNf55bq0Z3Ij =KmD6 -----END PGP SIGNATURE----- --=-ziWatrK++DeI4IwAXdMQ-- --===============6464741517607210620== 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 --===============6464741517607210620==--