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: Thu, 23 Jul 2015 15:46:11 +0200 Message-ID: <1437659171.5036.78.camel@citrix.com> References: <1437042762.28251.18.camel@citrix.com> <55A7A7F40200007800091D60@mail.emea.novell.com> <55A78DF2.1060709@citrix.com> <20150716152513.GU12455@zion.uk.xensource.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> <1437576645.5036.56.camel@citrix.com> <55AFB773.7010906@oracle.com> <1437580199.5036.64.camel@citrix.com> <55AFDC7B.60909@oracle.com> Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============7717173390686890026==" Return-path: Received: from mail6.bemta14.messagelabs.com ([193.109.254.103]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1ZIGpI-000842-MB for xen-devel@lists.xenproject.org; Thu, 23 Jul 2015 13:46:20 +0000 In-Reply-To: <55AFDC7B.60909@oracle.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: Boris Ostrovsky Cc: Juergen Gross , Elena Ufimtseva , Wei Liu , Andrew Cooper , David Vrabel , Jan Beulich , "xen-devel@lists.xenproject.org" List-Id: xen-devel@lists.xenproject.org --===============7717173390686890026== Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="=-Rk7bZHAds1Gyy4Zqi53q" --=-Rk7bZHAds1Gyy4Zqi53q Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable On Wed, 2015-07-22 at 14:10 -0400, Boris Ostrovsky wrote: > On 07/22/2015 11:49 AM, Dario Faggioli wrote: > > In fact, of course there are other issues (like the ones you're > > mentioning, caused by this), but it's only with vNUMA that I see 2 out > > of 4 vcpus completely lost! :-/ >=20 > My guess would be that scheduling domains are not set up properly. And= =20 > perhaps because your test has lots of IO the load doesn't cross=20 > thresholds that are needed to switch to another domain? >=20 I also things sched domains are involved. However, my test has no IO at all, actually. > Does it work the same way if you run a compiled busy loop (i.e.=20 > 'main(){while(1);}')? >=20 Well, I can try, but I think that 'yes > /dev/null' (a bunch of them), is really close to that. Dario --=20 <> (Raistlin Majere) ----------------------------------------------------------------- Dario Faggioli, Ph.D, http://about.me/dario.faggioli Senior Software Engineer, Citrix Systems R&D Ltd., Cambridge (UK) --=-Rk7bZHAds1Gyy4Zqi53q 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 iEYEABECAAYFAlWw8CMACgkQk4XaBE3IOsRO6ACeIdAZbuWCnFf/N2TI3uWHGaOu w2sAn1uaJzA9X6agZb8sYugtA7EqySo0 =yRN4 -----END PGP SIGNATURE----- --=-Rk7bZHAds1Gyy4Zqi53q-- --===============7717173390686890026== 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 --===============7717173390686890026==--