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From: Dario Faggioli <raistlin@linux.it>
To: Ian Campbell <ian.campbell@citrix.com>
Cc: Andre Przywara <andre.przywara@amd.com>,
	Stefano Stabellini <Stefano.Stabellini@eu.citrix.com>,
	George Dunlap <George.Dunlap@eu.citrix.com>,
	Juergen Gross <juergen.gross@ts.fujitsu.com>,
	Ian Jackson <Ian.Jackson@eu.citrix.com>,
	"xen-devel@lists.xen.org" <xen-devel@lists.xen.org>,
	Roger Pau Monne <roger.pau@citrix.com>
Subject: Re: [PATCH 00 of 10 v3] Automatic NUMA placement for xl
Date: Mon, 09 Jul 2012 16:32:43 +0200	[thread overview]
Message-ID: <1341844363.3657.9.camel@Abyss> (raw)
In-Reply-To: <1341772341.797.1.camel@hastur.hellion.org.uk>


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On Sun, 2012-07-08 at 12:32 -0600, Ian Campbell wrote: 
> On Wed, 2012-07-04 at 12:17 -0400, Dario Faggioli wrote:
> > Hello,
> > 
> > Third version of the NUMA placement series Xen 4.2.
> 
> Starting an HVM guest (although I don't suppose it is HVM specific) on a
> none NUMA system I get this:
> 
>         libxl: debug: libxl_numa.c:270:libxl__get_numa_candidates: only 1 node. no placement required
>         libxl: detail: libxl_dom.c:175:numa_place_domain: 0 NUMA placement candidates found
>         libxl: notice: libxl_dom.c:180:numa_place_domain: NUMA placement failed, performance might be affected
>         
Mmm... I see. No, it's not HVM specific and you're right, it does not
make much sense.

> this being a non-NUMA system I suppose it is not the end of the world.
> It'd be nice to avoid the warning though -- perhaps
> libxl__get_numa_candidates should either not special case single node
> systems or it should manually return the trivial candidate set?
> 
Yep, I can definitely do that, along with the other fix you suggested
and the wording of the doc patch and resend the last three.

Thanks and Regards,
Dario

-- 
<<This happens because I choose it to happen!>> (Raistlin Majere)
-----------------------------------------------------------------
Dario Faggioli, Ph.D, http://retis.sssup.it/people/faggioli
Senior Software Engineer, Citrix Systems R&D Ltd., Cambridge (UK)



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  reply	other threads:[~2012-07-09 14:32 UTC|newest]

Thread overview: 51+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-07-04 16:17 [PATCH 00 of 10 v3] Automatic NUMA placement for xl Dario Faggioli
2012-07-04 16:18 ` [PATCH 01 of 10 v3] libxl: add a new Array type to the IDL Dario Faggioli
2012-07-04 16:18 ` [PATCH 02 of 10 v3] libxl, libxc: introduce libxl_get_numainfo() Dario Faggioli
2012-07-06 10:35   ` Ian Campbell
2012-07-04 16:18 ` [PATCH 03 of 10 v3] xl: add more NUMA information to `xl info -n' Dario Faggioli
2012-07-06 11:37   ` Ian Campbell
2012-07-06 12:00     ` Dario Faggioli
2012-07-06 12:15       ` Ian Campbell
2012-07-06 12:52         ` Dario Faggioli
2012-07-04 16:18 ` [PATCH 04 of 10 v3] libxl: rename libxl_cpumap to libxl_bitmap Dario Faggioli
2012-07-06 10:39   ` Ian Campbell
2012-07-04 16:18 ` [PATCH 05 of 10 v3] libxl: expand the libxl_bitmap API a bit Dario Faggioli
2012-07-06 10:40   ` Ian Campbell
2012-07-04 16:18 ` [PATCH 06 of 10 v3] libxl: introduce some node map helpers Dario Faggioli
2012-07-04 16:18 ` [PATCH 07 of 10 v3] libxl: explicitly check for libmath in autoconf Dario Faggioli
2012-07-04 16:44   ` Roger Pau Monne
2012-07-06 11:42   ` Ian Campbell
2012-07-06 11:54     ` Dario Faggioli
2012-07-04 16:18 ` [PATCH 08 of 10 v3] libxl: enable automatic placement of guests on NUMA nodes Dario Faggioli
2012-07-04 16:41   ` Dario Faggioli
2012-07-06 10:55   ` Ian Campbell
2012-07-06 13:03     ` Dario Faggioli
2012-07-06 13:21       ` Ian Campbell
2012-07-06 13:52         ` Dario Faggioli
2012-07-06 13:54           ` Ian Campbell
2012-07-06 11:30   ` George Dunlap
2012-07-06 13:00     ` Dario Faggioli
2012-07-06 13:05       ` George Dunlap
2012-07-06 14:35         ` Dario Faggioli
2012-07-06 14:40           ` George Dunlap
2012-07-06 16:27             ` Ian Campbell
2012-07-04 16:18 ` [PATCH 09 of 10 v3] libxl: have NUMA placement deal with cpupools Dario Faggioli
2012-07-06 12:42   ` George Dunlap
2012-07-06 13:10     ` Dario Faggioli
2012-07-06 13:27       ` George Dunlap
2012-07-06 13:32         ` Ian Campbell
2012-07-06 13:42         ` Dario Faggioli
2012-07-10 15:16         ` Dario Faggioli
2012-07-04 16:18 ` [PATCH 10 of 10 v3] Some automatic NUMA placement documentation Dario Faggioli
2012-07-06 14:08   ` George Dunlap
2012-07-06 14:26     ` George Dunlap
2012-07-06 14:37       ` Dario Faggioli
2012-07-06 11:16 ` [PATCH 00 of 10 v3] Automatic NUMA placement for xl Ian Campbell
2012-07-06 11:20   ` Ian Campbell
2012-07-06 11:22     ` Ian Campbell
2012-07-06 13:05       ` Dario Faggioli
2012-07-06 12:19 ` Ian Campbell
2012-07-08 18:32 ` Ian Campbell
2012-07-09 14:32   ` Dario Faggioli [this message]
  -- strict thread matches above, loose matches on Subject: below --
2012-07-04 16:02 Dario Faggioli
2012-07-04 16:21 ` Dario Faggioli

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