From mboxrd@z Thu Jan 1 00:00:00 1970 From: Dario Faggioli Subject: Re: [PATCH 1/5] x86: allow specifying the NUMA nodes Dom0 should run on Date: Fri, 6 Mar 2015 10:46:56 +0000 Message-ID: <1425638814.12503.12.camel@citrix.com> References: <54EF315902000078000640FF@mail.emea.novell.com> <54EF3348020000780006413C@mail.emea.novell.com> <1424970840.4742.228.camel@citrix.com> <54F03CE0020000780006472F@mail.emea.novell.com> <1425031468.10194.43.camel@citrix.com> <54F05A0C0200007800064878@mail.emea.novell.com> <1425048895.10194.108.camel@citrix.com> <54F5A047020000780006592F@mail.emea.novell.com> <54F97D420200007800066DC1@mail.emea.novell.com> Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============4107062054597045661==" Return-path: Received: from mail6.bemta3.messagelabs.com ([195.245.230.39]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1YTpmV-0003LN-3P for xen-devel@lists.xenproject.org; Fri, 06 Mar 2015 10:46:59 +0000 In-Reply-To: <54F97D420200007800066DC1@mail.emea.novell.com> Content-Language: en-US List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xen.org Errors-To: xen-devel-bounces@lists.xen.org To: "JBeulich@suse.com" Cc: "Keir (Xen.org)" , Ian Campbell , Andrew Cooper , "Tim (Xen.org)" , "xen-devel@lists.xenproject.org" , Ian Jackson List-Id: xen-devel@lists.xenproject.org --===============4107062054597045661== Content-Language: en-US Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="=-R4x7v5TYnA3TGCQQb+OP" --=-R4x7v5TYnA3TGCQQb+OP Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable On Fri, 2015-03-06 at 09:11 +0000, Jan Beulich wrote: > >>> On 03.03.15 at 11:51, wrote: > > That would then leave introducing a "relaxed (or "strict", > > depending on what we'd like to be the default) mode in the patch > > here, controlling whether ->cpu_hard_affinity gets overridden > > (and we'd always override ->cpu_soft_affinity). >=20 > Having implemented this "relaxed" addition (patch to be posted after > a few more tests), I find that with Dom0 being restricted to half of > the nodes of the test system, soft affinity set to that set, and hard > affinity left set to "all", many Dom0 vCPU-s nevertheless run on the > CPUs not in its soft affinity (and there's no other load on the system). > I saw the patch and just povided my Reviewed-by, as it looked good to me (relaxed mode included). > Is there a bug in that (credit) scheduler logic somewhere? >=20 There may be, of course, but nothing showed up during testing and benchmarking the feature. It's true that I probably concentrate mostly on DomU (especially while benchmarking), but it worked for me, and numbers from benchmarks confirmed that. Anyway, let me have a look! One question, was there any other load in the system, especially on the pCPUs with which Dom0's vCPUs have soft affinity? Thanks and Regards, Dario --=-R4x7v5TYnA3TGCQQb+OP 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 iEYEABECAAYFAlT5hZ4ACgkQk4XaBE3IOsQsOwCfbO+Tdnn6rDJbRlUA4smAoGLq lTMAoKSWN7w+P0rNDMiibtZXFVBCSw3X =rBpC -----END PGP SIGNATURE----- --=-R4x7v5TYnA3TGCQQb+OP-- --===============4107062054597045661== 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 --===============4107062054597045661==--