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From: Dario Faggioli <dario.faggioli@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>,
	George Dunlap <george.dunlap@eu.citrix.com>,
	Andrew Cooper <Andrew.Cooper3@citrix.com>,
	JuergenGross <juergen.gross@ts.fujitsu.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>
Subject: Re: [PATCH RESEND 05/12] xen: numa-sched: make space for per-vcpu node-affinity
Date: Wed, 6 Nov 2013 00:12:25 +0100	[thread overview]
Message-ID: <1383693145.15457.64.camel@Abyss> (raw)
In-Reply-To: <5279395302000078000FFD16@nat28.tlf.novell.com>


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On mar, 2013-11-05 at 17:30 +0000, Jan Beulich wrote:
> >>> On 05.11.13 at 18:16, George Dunlap <george.dunlap@eu.citrix.com> wrote:
> > This would mean the toolstack either assuming, when someone calls 
> > vcpu_set_node_affinity, that soft_affinity == numa_affinity, or keeping 
> > its own copy of numa_affinity for each vcpu around somewhere.
> 
> Question is how reasonable it is for the tool stack to keep such
> information around and up-to-date, in particular considering
> node/CPU/memory hotplug.
>
Right. Well, I may be wrong, and I won't know until I'll actually try
coding it (first thing in the morning), but I honestly don't think there
will be much to keep around at the toolstack level.

>  If that's reasonable, then your
> proposal below seems to be the right one architecturally, i.e.
> keeping policy entirely at the tools level.
> 
Agreed.

Thanks and Regards,
Dario

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


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  reply	other threads:[~2013-11-05 23:12 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
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 [this message]
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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