From: Darren Hart <darren@os.amperecomputing.com>
To: Dietmar Eggemann <dietmar.eggemann@arm.com>
Cc: Vincent Guittot <vincent.guittot@linaro.org>,
Will Deacon <will@kernel.org>,
LKML <linux-kernel@vger.kernel.org>,
Linux Arm <linux-arm-kernel@lists.infradead.org>,
Sudeep Holla <sudeep.holla@arm.com>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
"Rafael J. Wysocki" <rafael@kernel.org>,
Catalin Marinas <Catalin.Marinas@arm.com>,
Peter Zijlstra <peterz@infradead.org>,
Barry Song <song.bao.hua@hisilicon.com>,
Valentin Schneider <Valentin.Schneider@arm.com>,
"D . Scott Phillips" <scott@os.amperecomputing.com>,
Ilkka Koskinen <ilkka@os.amperecomputing.com>,
stable@vger.kernel.org
Subject: Re: [PATCH v3] topology: make core_mask include at least cluster_siblings
Date: Mon, 14 Mar 2022 09:56:24 -0700 [thread overview]
Message-ID: <Yi9zuL8RZyYu1dVL@fedora> (raw)
In-Reply-To: <35344252-5284-b08e-fec7-6dc99476b4b0@arm.com>
On Mon, Mar 14, 2022 at 10:37:21AM +0100, Dietmar Eggemann wrote:
> On 09/03/2022 19:26, Darren Hart wrote:
> > On Wed, Mar 09, 2022 at 01:50:07PM +0100, Dietmar Eggemann wrote:
> >> On 08/03/2022 18:49, Darren Hart wrote:
> >>> On Tue, Mar 08, 2022 at 05:03:07PM +0100, Dietmar Eggemann wrote:
> >>>> On 08/03/2022 12:04, Vincent Guittot wrote:
> >>>>> On Tue, 8 Mar 2022 at 11:30, Will Deacon <will@kernel.org> wrote:
> >>
> >> [...]
> >>
> >>>> IMHO, if core_mask weight is 1, MC will be removed/degenerated anyway.
> >>>>
> >>>> This is what I get on my Ampere Altra (I guess I don't have the ACPI
> >>>> changes which would let to a CLS sched domain):
> >>>>
> >>>> # cat /sys/kernel/debug/sched/domains/cpu0/domain*/name
> >>>> DIE
> >>>> NUMA
> >>>> root@oss-altra01:~# zcat /proc/config.gz | grep SCHED_CLUSTER
> >>>> CONFIG_SCHED_CLUSTER=y
> >>>
> >>> I'd like to follow up on this. Would you share your dmidecode BIOS
> >>> Information section?
> >>
> >> # dmidecode -t 0
> >> # dmidecode 3.2
> >> Getting SMBIOS data from sysfs.
> >> SMBIOS 3.2.0 present.
> >>
> >> Handle 0x0000, DMI type 0, 26 bytes
> >> BIOS Information
> >> Vendor: Ampere(TM)
> >> Version: 0.9.20200724
> >> Release Date: 2020/07/24
> >> ROM Size: 7680 kB
> >> Characteristics:
> >> PCI is supported
> >> BIOS is upgradeable
> >> Boot from CD is supported
> >> Selectable boot is supported
> >> ACPI is supported
> >> UEFI is supported
> >> BIOS Revision: 5.15
> >> Firmware Revision: 0.6
> >>
> >
> > Thank you, I'm following internally and will get with you.
>
> Looks like in my PPTT, the `Processor Hierarchy Nodes` which represents
> cluster nodes have no valid `ACPI Processor ID`.
Thanks, I'm looking for the right person to get us the latest information
available this. Will follow up once I have.
--
Darren Hart
Ampere Computing / OS and Kernel
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http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2022-03-14 17:01 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-03-04 17:01 [PATCH v3] topology: make core_mask include at least cluster_siblings Darren Hart
2022-03-08 10:30 ` Will Deacon
2022-03-08 10:45 ` Sudeep Holla
2022-03-08 11:04 ` Vincent Guittot
2022-03-08 16:03 ` Dietmar Eggemann
2022-03-08 17:49 ` Darren Hart
2022-03-09 12:50 ` Dietmar Eggemann
2022-03-09 18:26 ` Darren Hart
2022-03-14 9:37 ` Dietmar Eggemann
2022-03-14 16:56 ` Darren Hart [this message]
2022-03-16 14:42 ` Dietmar Eggemann
2022-03-14 16:35 ` Dietmar Eggemann
2022-03-14 16:54 ` Darren Hart
2022-03-16 14:48 ` Dietmar Eggemann
2022-03-16 15:20 ` Darren Hart
2022-03-16 15:55 ` Sudeep Holla
2022-03-21 14:30 ` Will Deacon
2022-03-21 15:56 ` Greg Kroah-Hartman
2022-03-14 21:29 ` [PATCH] arch_topology: Swap MC & CLS SD mask if MC weight==1 & kernel test robot
2022-03-14 23:02 ` kernel test robot
2022-03-17 6:10 ` [PATCH v3] topology: make core_mask include at least cluster_siblings Barry Song
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