From: George Dunlap <george.dunlap@eu.citrix.com>
To: Jan Beulich <JBeulich@suse.com>
Cc: MarcusGranado <Marcus.Granado@eu.citrix.com>,
Justin Weaver <jtweaver@hawaii.edu>,
Ian Campbell <Ian.Campbell@citrix.com>,
Li Yechen <lccycc123@gmail.com>,
Andrew Cooper <Andrew.Cooper3@citrix.com>,
Dario Faggioli <dario.faggioli@citrix.com>,
Ian Jackson <Ian.Jackson@eu.citrix.com>,
Matt Wilson <msw@amazon.com>,
xen-devel <xen-devel@lists.xenproject.org>,
Daniel De Graaf <dgdegra@tycho.nsa.gov>,
KeirFraser <keir@xen.org>, Elena Ufimtseva <ufimtseva@gmail.com>,
Juergen Gross <juergen.gross@ts.fujitsu.com>
Subject: Re: [PATCH RESEND 05/12] xen: numa-sched: make space for per-vcpu node-affinity
Date: Tue, 5 Nov 2013 15:39:55 +0000 [thread overview]
Message-ID: <5279114B.9080405@eu.citrix.com> (raw)
In-Reply-To: <52791B8702000078000FFBC4@nat28.tlf.novell.com>
On 11/05/2013 03:23 PM, Jan Beulich wrote:
>>>> On 05.11.13 at 16:11, George Dunlap <george.dunlap@eu.citrix.com> wrote:
>> Or, we could internally change the names to "cpu_hard_affinity" and
>> "cpu_soft_affinity", since that's effectively what the scheduler will
>> do. It's possible someone might want to set soft affinities for some
>> other reason besides NUMA performance.
>
> I like that.
A potential problem with that is the "auto domain numa" thing. In this
patch, if the domain numa affinity is not set but vcpu numa affinity is,
the domain numa affinity (which will be used to allocate memory for the
domain) will be set based on the vcpu numa affinity. That seems like a
useful feature (though perhaps it's starting to violate the "policy
should be in the tools" principle). If we change this to just "hard
affinity" and "soft affinity", we'll lose the natural logical connection
there. It might have impacts on how we end up doing vNUMA as well. So
I'm a bit torn ATM.
Dario, any thoughts?
-George
next prev parent reply other threads:[~2013-11-05 15:40 UTC|newest]
Thread overview: 71+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-11-05 14:33 [PATCH RESEND 00/12] Implement per-vcpu NUMA node-affinity for credit1 Dario Faggioli
2013-11-05 14:34 ` [PATCH RESEND 01/12] xen: numa-sched: leave node-affinity alone if not in "auto" mode Dario Faggioli
2013-11-05 14:43 ` George Dunlap
2013-11-05 14:34 ` [PATCH RESEND 02/12] xl: allow for node-wise specification of vcpu pinning Dario Faggioli
2013-11-05 14:50 ` George Dunlap
2013-11-06 8:48 ` Dario Faggioli
2013-11-07 18:17 ` Ian Jackson
2013-11-08 9:24 ` Dario Faggioli
2013-11-08 15:20 ` Ian Jackson
2013-11-05 14:34 ` [PATCH RESEND 03/12] xl: implement and enable dryrun mode for `xl vcpu-pin' Dario Faggioli
2013-11-05 14:34 ` [PATCH RESEND 04/12] xl: test script for the cpumap parser (for vCPU pinning) Dario Faggioli
2013-11-05 14:35 ` [PATCH RESEND 05/12] xen: numa-sched: make space for per-vcpu node-affinity Dario Faggioli
2013-11-05 14:52 ` Jan Beulich
2013-11-05 15:03 ` George Dunlap
2013-11-05 15:11 ` Jan Beulich
2013-11-05 15:24 ` George Dunlap
2013-11-05 22:15 ` Dario Faggioli
2013-11-05 15:11 ` George Dunlap
2013-11-05 15:23 ` Jan Beulich
2013-11-05 15:39 ` George Dunlap [this message]
2013-11-05 16:56 ` George Dunlap
2013-11-05 17:16 ` George Dunlap
2013-11-05 17:30 ` Jan Beulich
2013-11-05 23:12 ` Dario Faggioli
2013-11-05 23:01 ` Dario Faggioli
2013-11-06 9:39 ` Dario Faggioli
2013-11-06 9:46 ` Jan Beulich
2013-11-06 10:00 ` Dario Faggioli
2013-11-06 11:44 ` George Dunlap
2013-11-06 14:26 ` Dario Faggioli
2013-11-06 14:56 ` George Dunlap
2013-11-06 15:14 ` Jan Beulich
2013-11-06 16:12 ` George Dunlap
2013-11-06 16:22 ` Jan Beulich
2013-11-06 16:48 ` Dario Faggioli
2013-11-06 16:20 ` Dario Faggioli
2013-11-06 16:23 ` Dario Faggioli
2013-11-05 17:24 ` Jan Beulich
2013-11-05 17:31 ` George Dunlap
2013-11-05 23:08 ` Dario Faggioli
2013-11-05 22:54 ` Dario Faggioli
2013-11-05 22:22 ` Dario Faggioli
2013-11-06 11:41 ` Dario Faggioli
2013-11-06 14:47 ` George Dunlap
2013-11-06 16:53 ` Dario Faggioli
2013-11-05 14:35 ` [PATCH RESEND 06/12] xen: numa-sched: domain node-affinity always comes from vcpu node-affinity Dario Faggioli
2013-11-05 14:35 ` [PATCH RESEND 07/12] xen: numa-sched: use per-vcpu node-affinity for actual scheduling Dario Faggioli
2013-11-05 16:20 ` George Dunlap
2013-11-06 9:15 ` Dario Faggioli
2013-11-05 14:35 ` [PATCH RESEND 08/12] xen: numa-sched: enable getting/specifying per-vcpu node-affinity Dario Faggioli
2013-11-05 14:35 ` [PATCH RESEND 09/12] libxc: " Dario Faggioli
2013-11-07 18:27 ` Ian Jackson
2013-11-12 16:01 ` Konrad Rzeszutek Wilk
2013-11-12 16:43 ` George Dunlap
2013-11-12 16:55 ` Konrad Rzeszutek Wilk
2013-11-12 18:40 ` Dario Faggioli
2013-11-12 19:13 ` Konrad Rzeszutek Wilk
2013-11-12 21:36 ` Dario Faggioli
2013-11-13 10:57 ` Dario Faggioli
2013-11-05 14:35 ` [PATCH RESEND 10/12] libxl: " Dario Faggioli
2013-11-07 18:29 ` Ian Jackson
2013-11-08 9:18 ` Dario Faggioli
2013-11-08 15:07 ` Ian Jackson
2013-11-05 14:36 ` [PATCH RESEND 11/12] xl: " Dario Faggioli
2013-11-07 18:33 ` Ian Jackson
2013-11-08 9:33 ` Dario Faggioli
2013-11-08 15:18 ` Ian Jackson
2013-11-05 14:36 ` [PATCH RESEND 12/12] xl: numa-sched: enable specifying node-affinity in VM config file Dario Faggioli
2013-11-07 18:35 ` Ian Jackson
2013-11-08 9:49 ` Dario Faggioli
2013-11-08 15:22 ` Ian Jackson
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