From mboxrd@z Thu Jan 1 00:00:00 1970 From: Dario Faggioli Subject: Re: RFC: Still TODO for 4.2? xl domain numa memory allocation vs xm/xend Date: Fri, 20 Jan 2012 10:47:03 +0100 Message-ID: <1327052823.2337.5.camel@Abyss> References: <1325694562.25206.304.camel@zakaz.uk.xensource.com> <20120119211430.GT12984@reaktio.net> <1327046368.21391.29.camel@dagon.hellion.org.uk> <20120120081529.GU12984@reaktio.net> <1327050108.17599.113.camel@zakaz.uk.xensource.com> Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============3411103588225465041==" Return-path: In-Reply-To: <1327050108.17599.113.camel@zakaz.uk.xensource.com> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xensource.com Errors-To: xen-devel-bounces@lists.xensource.com To: Ian Campbell Cc: xen-devel , "Keir (Xen.org)" , Stefano Stabellini , "Tim (Xen.org)" , Juergen Gross , Ian Jackson , Jan Beulich List-Id: xen-devel@lists.xenproject.org --===============3411103588225465041== Content-Type: multipart/signed; micalg="pgp-sha1"; protocol="application/pgp-signature"; boundary="=-fWEfLRRSJeTKP3ANoemI" --=-fWEfLRRSJeTKP3ANoemI Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable On Fri, 2012-01-20 at 09:01 +0000, Ian Campbell wrote:=20 > > See this thread:=20 > > http://old-list-archives.xen.org/archives/html/xen-devel/2011-07/msg014= 23.html > >=20 > > where Stefano wrote: > > "I think we forgot about this feature but it is important and hopefully > > somebody will write a patch for it before 4.2 is out." >=20 > Is anyone looking into this? >=20 Hi, Actually, I'll be investigating how we could gradually introduce some NUMA support in both the Xen scheduler and memory allocator! I already have some ideas and I'm looking at the code to better understand it and find out what's the best strategy and from where it's better to start. I can give some more details, here or on separate thread, in a few days, if you're interested. The only thing is that I'm not sure how far I'll be able to get before 4.2. I really think I'll have _something_ but maybe not a full-fledged NUMA-aware patchset! :-P > Does cpupool-numa-split solve this same problem? >=20 I'm looking right into that, and indeed I think it does a lot in this direction. The idea was to try doing something similar in a sort of automatic fashion, so that everyone can benefit from at least some NUMA-awareness, even without having to bother with cpupools. It that what you were asking? Thanks and Regards, Dario --=20 <> (Raistlin Majere) ------------------------------------------------------------------- Dario Faggioli, http://retis.sssup.it/people/faggioli Senior Software Engineer, Citrix Systems R&D Ltd., Cambridge (UK) PhD Candidate, ReTiS Lab, Scuola Superiore Sant'Anna, Pisa (Italy) --=-fWEfLRRSJeTKP3ANoemI 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 v1.4.11 (GNU/Linux) iEYEABECAAYFAk8ZOBcACgkQk4XaBE3IOsREngCfUHwYuAVy99ieTiPJ5ET5S1wP BAgAn1Ci4M3BREWeTNHUMbOYGUT9Pl2G =CwVH -----END PGP SIGNATURE----- --=-fWEfLRRSJeTKP3ANoemI-- --===============3411103588225465041== 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.xensource.com http://lists.xensource.com/xen-devel --===============3411103588225465041==--