From: Dario Faggioli <dario.faggioli@citrix.com>
To: Julien Grall <julien.grall@arm.com>, Peng Fan <van.freenix@gmail.com>
Cc: Juergen Gross <jgross@suse.com>, Peng Fan <peng.fan@nxp.com>,
Stefano Stabellini <sstabellini@kernel.org>,
Steve Capper <Steve.Capper@arm.com>,
George Dunlap <George.Dunlap@eu.citrix.com>,
Andrew Cooper <andrew.cooper3@citrix.com>,
Punit Agrawal <punit.agrawal@arm.com>,
George Dunlap <george.dunlap@citrix.com>,
"xen-devel@lists.xen.org" <xen-devel@lists.xen.org>,
Jan Beulich <jbeulich@suse.com>
Subject: Re: [RFC 0/5] xen/arm: support big.little SoC
Date: Fri, 23 Sep 2016 15:36:57 +0200 [thread overview]
Message-ID: <1474637817.23934.12.camel@citrix.com> (raw)
In-Reply-To: <b034126d-fe05-d69b-b7c7-4931eb71d8fb@arm.com>
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On Fri, 2016-09-23 at 11:15 +0100, Julien Grall wrote:
> On 23/09/16 11:05, Peng Fan wrote:
> > If cluster is not prefered, cpuclass maybe a choice, but I
> > personally perfer
> > "cluster" split for ARM.
> >
> > Thanks,
> > Peng.
> >
> > [1] https://en.wikipedia.org/wiki/ARM_big.LITTLE
>
> Please try to have a think on all the use case and not only yours.
>
This last line is absolutely true and very important!
That being said, I am a bit lost.
So, AFAICT, in order to act properly when the user asks for:
vcpuclass = ["1,2:foo", "0,3:bar"]
we need to decide what "foo" and "bar" are at the xl and libxl level,
and whether they are the same all the way down to Xen (and if not,
what's the mapping).
We also said it would be nice to support:
xl cpupool-split --feature=foobar
and hence we also need to decide what's foobar, whether it is in the
same namespace of foo and bar (i.e., it can be foobar==foo, or
foobar==bar, etc), or it is something else, or both.
Can someone list what are the various alternative approaches on the
table?
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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next prev parent reply other threads:[~2016-09-23 13:36 UTC|newest]
Thread overview: 85+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-09-19 2:08 [RFC 0/5] xen/arm: support big.little SoC van.freenix
2016-09-19 2:08 ` [RFC 1/5] xen/arm: domain_build: setting opt_dom0_max_vcpus according to cpupool0 info van.freenix
2016-09-19 2:08 ` [RFC 2/5] xen: cpupool: introduce cpupool_arch_info van.freenix
2016-09-19 2:08 ` [RFC 3/5] xen: cpupool: add arch cpupool hook van.freenix
2016-09-19 2:08 ` [RFC 4/5] xen/arm: move vpidr from arch_domain to arch_vcpu van.freenix
2016-09-19 2:08 ` [RFC 5/5] xen/arm: cpupool: implement arch_domain_cpupool_compatible van.freenix
2016-09-19 8:09 ` [RFC 0/5] xen/arm: support big.little SoC Julien Grall
2016-09-19 8:36 ` Peng Fan
2016-09-19 8:53 ` Julien Grall
2016-09-19 9:38 ` Peng Fan
2016-09-19 9:59 ` Julien Grall
2016-09-19 13:15 ` Peng Fan
2016-09-19 20:56 ` Stefano Stabellini
2016-09-19 9:45 ` George Dunlap
2016-09-19 10:06 ` Julien Grall
2016-09-19 10:23 ` Juergen Gross
2016-09-19 17:18 ` Dario Faggioli
2016-09-19 21:03 ` Stefano Stabellini
2016-09-19 22:55 ` Dario Faggioli
2016-09-20 0:01 ` Stefano Stabellini
2016-09-20 0:54 ` Dario Faggioli
2016-09-20 10:03 ` Peng Fan
2016-09-20 10:27 ` George Dunlap
2016-09-20 15:34 ` Julien Grall
2016-09-20 17:24 ` Dario Faggioli
2016-09-20 19:09 ` Stefano Stabellini
2016-09-20 19:41 ` Julien Grall
2016-09-20 20:17 ` Stefano Stabellini
2016-09-21 8:38 ` Peng Fan
2016-09-21 9:22 ` George Dunlap
2016-09-21 12:35 ` Peng Fan
2016-09-21 15:00 ` Dario Faggioli
2016-09-21 10:15 ` Julien Grall
2016-09-21 12:28 ` Peng Fan
2016-09-21 15:06 ` Dario Faggioli
2016-09-22 9:45 ` Peng Fan
2016-09-22 11:21 ` Julien Grall
2016-09-23 2:38 ` Peng Fan
2016-09-21 10:09 ` Julien Grall
2016-09-21 10:22 ` George Dunlap
2016-09-21 13:06 ` Julien Grall
2016-09-21 15:45 ` Dario Faggioli
2016-09-21 19:28 ` Julien Grall
2016-09-22 6:16 ` Peng Fan
2016-09-22 8:43 ` Dario Faggioli
2016-09-22 11:24 ` Julien Grall
2016-09-22 16:31 ` Dario Faggioli
2016-09-23 13:56 ` Julien Grall
2016-09-21 18:13 ` Stefano Stabellini
2016-09-21 19:11 ` Julien Grall
2016-09-21 19:21 ` Julien Grall
2016-09-21 23:45 ` Stefano Stabellini
2016-09-22 6:49 ` Peng Fan
2016-09-22 8:50 ` Dario Faggioli
2016-09-22 9:27 ` Peng Fan
2016-09-22 9:51 ` George Dunlap
2016-09-22 10:09 ` Peng Fan
2016-09-22 10:39 ` Dario Faggioli
2016-09-22 10:13 ` Juergen Gross
2016-09-22 9:52 ` Dario Faggioli
2016-09-22 11:29 ` Julien Grall
2016-09-22 17:31 ` Stefano Stabellini
2016-09-22 18:54 ` Julien Grall
2016-09-23 2:14 ` Peng Fan
2016-09-23 9:24 ` Julien Grall
2016-09-23 10:05 ` Peng Fan
2016-09-23 10:15 ` Julien Grall
2016-09-23 13:36 ` Dario Faggioli [this message]
2016-09-24 1:57 ` Stefano Stabellini
2016-09-23 13:52 ` Dario Faggioli
2016-09-24 1:35 ` Stefano Stabellini
2016-09-23 2:03 ` Peng Fan
2016-09-22 10:05 ` Peng Fan
2016-09-22 16:26 ` Dario Faggioli
2016-09-22 17:33 ` Stefano Stabellini
2016-09-21 12:38 ` Peng Fan
2016-09-21 9:45 ` Dario Faggioli
2016-09-20 10:18 ` George Dunlap
2016-09-19 20:55 ` Stefano Stabellini
2016-09-19 10:33 ` George Dunlap
2016-09-19 13:33 ` Peng Fan
2016-09-20 0:11 ` Dario Faggioli
2016-09-20 6:18 ` Peng Fan
2016-09-19 16:43 ` Dario Faggioli
2016-09-19 13:08 ` Peng Fan
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