* mpam/snapshot/v5.17
@ 2022-06-09 7:55 itaru.kitayama
2022-06-13 16:44 ` mpam/snapshot/v5.17 Rob Herring
0 siblings, 1 reply; 5+ messages in thread
From: itaru.kitayama @ 2022-06-09 7:55 UTC (permalink / raw)
To: 'james.morse@arm.com'
Cc: 'linux-arm-kernel@lists.infradead.org', tan.shaopeng
Hi James,
I've been testing your snapshot in a VM on my M1 Max, but I see it can't mount the resctrl fs; is this expected?
Thanks,
Itaru.
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^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: mpam/snapshot/v5.17
2022-06-09 7:55 mpam/snapshot/v5.17 itaru.kitayama
@ 2022-06-13 16:44 ` Rob Herring
2022-06-13 21:59 ` mpam/snapshot/v5.17 itaru.kitayama
0 siblings, 1 reply; 5+ messages in thread
From: Rob Herring @ 2022-06-13 16:44 UTC (permalink / raw)
To: itaru.kitayama
Cc: 'james.morse@arm.com',
'linux-arm-kernel@lists.infradead.org',
tan.shaopeng
On Thu, Jun 09, 2022 at 07:55:30AM +0000, itaru.kitayama@fujitsu.com wrote:
> Hi James,
> I've been testing your snapshot in a VM on my M1 Max, but I see it
> can't mount the resctrl fs; is this expected?
I don't think you can mount resctrl without MPAM h/w support.
Does an Apple M1 have MPAM?
Doesn't really matter because MPAM within a VM is not supported in the
snapshot.
Rob
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^ permalink raw reply [flat|nested] 5+ messages in thread
* RE: mpam/snapshot/v5.17
2022-06-13 16:44 ` mpam/snapshot/v5.17 Rob Herring
@ 2022-06-13 21:59 ` itaru.kitayama
2022-06-15 10:26 ` mpam/snapshot/v5.17 James Morse
0 siblings, 1 reply; 5+ messages in thread
From: itaru.kitayama @ 2022-06-13 21:59 UTC (permalink / raw)
To: 'Rob Herring'
Cc: 'james.morse@arm.com',
'linux-arm-kernel@lists.infradead.org',
tan.shaopeng
Rob,
Indeed my colleague pointed that out to me as well. In the meantime, what's the best way to test the MPAM feature (8.4 optional)?
Itaru.
-----Original Message-----
From: Rob Herring <robh@kernel.org>
Sent: Tuesday, June 14, 2022 1:44 AM
To: Kitayama, Itaru/來山 至 <itaru.kitayama@fujitsu.com>
Cc: 'james.morse@arm.com' <james.morse@arm.com>; 'linux-arm-kernel@lists.infradead.org' <linux-arm-kernel@lists.infradead.org>; Tan, Shaopeng/譚 紹鵬 <tan.shaopeng@fujitsu.com>
Subject: Re: mpam/snapshot/v5.17
On Thu, Jun 09, 2022 at 07:55:30AM +0000, itaru.kitayama@fujitsu.com wrote:
> Hi James,
> I've been testing your snapshot in a VM on my M1 Max, but I see it
> can't mount the resctrl fs; is this expected?
I don't think you can mount resctrl without MPAM h/w support.
Does an Apple M1 have MPAM?
Doesn't really matter because MPAM within a VM is not supported in the snapshot.
Rob
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: mpam/snapshot/v5.17
2022-06-13 21:59 ` mpam/snapshot/v5.17 itaru.kitayama
@ 2022-06-15 10:26 ` James Morse
2022-06-15 16:44 ` mpam/snapshot/v5.17 Jonathan Cameron
0 siblings, 1 reply; 5+ messages in thread
From: James Morse @ 2022-06-15 10:26 UTC (permalink / raw)
To: itaru.kitayama, 'Rob Herring'
Cc: 'linux-arm-kernel@lists.infradead.org', tan.shaopeng
Hi Itaru,
On 6/13/22 22:59, itaru.kitayama@fujitsu.com wrote:
> Rob,
> Indeed my colleague pointed that out to me as well. In the meantime, what's the best way
> to test the MPAM feature (8.4 optional)?
I do my testing with the Fixed Virtual Platform from arm[0].
Its a bit of a pain to set up, but it configured correctly it presents MPAM MSC - although
they don't do anything as its not a performance model.
There are a ton of options, but the main two to try and enable are something like:
| cluster0.has_mpam=1
| cluster0.l3cache-mpamf_base=0x30000000
Let me know off list if you want a hand setting it up.
One day there will be hardware!
Thanks,
James
[0] https://developer.arm.com/Tools%20and%20Software/Fixed%20Virtual%20Platforms
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http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: mpam/snapshot/v5.17
2022-06-15 10:26 ` mpam/snapshot/v5.17 James Morse
@ 2022-06-15 16:44 ` Jonathan Cameron
0 siblings, 0 replies; 5+ messages in thread
From: Jonathan Cameron @ 2022-06-15 16:44 UTC (permalink / raw)
To: James Morse
Cc: itaru.kitayama, 'Rob Herring',
'linux-arm-kernel@lists.infradead.org',
tan.shaopeng
On Wed, 15 Jun 2022 11:26:27 +0100
James Morse <james.morse@arm.com> wrote:
> Hi Itaru,
>
> On 6/13/22 22:59, itaru.kitayama@fujitsu.com wrote:
> > Rob,
> > Indeed my colleague pointed that out to me as well. In the meantime, what's the best way
> > to test the MPAM feature (8.4 optional)?
>
> I do my testing with the Fixed Virtual Platform from arm[0].
> Its a bit of a pain to set up, but it configured correctly it presents MPAM MSC - although
> they don't do anything as its not a performance model.
>
> There are a ton of options, but the main two to try and enable are something like:
> | cluster0.has_mpam=1
> | cluster0.l3cache-mpamf_base=0x30000000
>
> Let me know off list if you want a hand setting it up.
>
>
> One day there will be hardware!
There is (and has been for several years... :)
https://chowdera.com/2021/05/20210504023631776n.html
openEuler is carrying code for it.
https://gitee.com/openeuler/kernel/tree/openEuler-22.03-LTS/arch/arm64/kernel/mpam
>
>
> Thanks,
>
> James
>
> [0] https://developer.arm.com/Tools%20and%20Software/Fixed%20Virtual%20Platforms
>
> _______________________________________________
> linux-arm-kernel mailing list
> linux-arm-kernel@lists.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
_______________________________________________
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http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2022-06-15 16:45 UTC | newest]
Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2022-06-09 7:55 mpam/snapshot/v5.17 itaru.kitayama
2022-06-13 16:44 ` mpam/snapshot/v5.17 Rob Herring
2022-06-13 21:59 ` mpam/snapshot/v5.17 itaru.kitayama
2022-06-15 10:26 ` mpam/snapshot/v5.17 James Morse
2022-06-15 16:44 ` mpam/snapshot/v5.17 Jonathan Cameron
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