From mboxrd@z Thu Jan 1 00:00:00 1970 From: Dario Faggioli Subject: Re: [PATCH RFC v2 0/7] xen: vNUMA introduction Date: Fri, 13 Sep 2013 13:12:31 +0200 Message-ID: <1379070751.6095.27.camel@Solace> References: <1379062177-13681-1-git-send-email-ufimtseva@gmail.com> <5233073002000078000F3083@nat28.tlf.novell.com> Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============7236904213242071116==" Return-path: Received: from mail6.bemta4.messagelabs.com ([85.158.143.247]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1VKRIj-00030q-Vs for xen-devel@lists.xenproject.org; Fri, 13 Sep 2013 11:12:38 +0000 In-Reply-To: <5233073002000078000F3083@nat28.tlf.novell.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: Jan Beulich Cc: keir@xen.org, Ian.Campbell@citrix.com, lccycc123@gmail.com, george.dunlap@eu.citrix.com, stefano.stabellini@eu.citrix.com, ian.jackson@eu.citrix.com, Elena Ufimtseva , xen-devel , sw@linux.com List-Id: xen-devel@lists.xenproject.org --===============7236904213242071116== Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="=-V2qmVZZ8HGBsHn9lweue" --=-V2qmVZZ8HGBsHn9lweue Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable On ven, 2013-09-13 at 11:38 +0100, Jan Beulich wrote: > >>> On 13.09.13 at 10:49, Elena Ufimtseva wrote: > > VM config: > >=20 > > memory =3D 16384 > > vcpus =3D 8 > > name =3D "rcbig" > > vnodes =3D 8 > > vnumamem =3D "2g, 2g, 2g, 2g, 2g, 2g, 2g, 2g" > > vcpu_to_vnode =3D"5 6 7 4 3 2 1 0" >=20 > For an example it would probably be useful to use a more traditional > case, i.e. more than one vCPU per vNode. >=20 Right... Perhaps Elena could post another example with such characteristics, to show us what happens in that case? (And of course use that for the cover letter of next version too :-P) > Also, the settings above say nothing about the relationship to > physical nodes, yet that's an important aspect for VM creation. > Are you perhaps implying that each vNode would get assigned > to a tool stack chosen pNode?=20 > Yep. So, right now, I don't think there is a way to specify an explicit virtual to physical mapping, and what happens is exactly that: the toolstack picks. However, I indeed agree that we want to introduce something like that, to give the user full control, if he's interested in it. That being said, I also think that, if the user does not say anything about that, having the toolstack choosing is a sane default. > What if there are more vNodes > than pNodes?=20 > That is the actual issue, from an UI perspective, on which I'd like some discussion to happen... I'll send an e-mail with some more details on that later. > What if node distances vary, and the admin wants > some control over the placement? >=20 Again, I totally agree: we should provide such mechanism. 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) --=-V2qmVZZ8HGBsHn9lweue 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 v1.4.14 (GNU/Linux) iEYEABECAAYFAlIy8x8ACgkQk4XaBE3IOsS5EwCfcLFBrERG16hY+KH5zR9NoBEB cLkAn3pYcuQu/hxxhRCZ1uVjtj7D2c7n =LXw9 -----END PGP SIGNATURE----- --=-V2qmVZZ8HGBsHn9lweue-- --===============7236904213242071116== 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 --===============7236904213242071116==--