On Mon, Aug 16, 2021 at 08:41:29AM +0000, Jonathan Cameron via Linaro-open-discussions wrote:
>
>
> Hi Jammy,
>
> I'll be away until the 26th, but obviously that should be no barrier
> to topics I am less involved with as I can easily catch up later.
Maybe it is best to reschedule it early September since it is holiday
season. I could do September 1st and 2nd and the following week.
Please let me know what you think.
Thanks,
Lorenzo
>
> Thanks
>
> Jonathan
>
>
> ________________________________
>
> Jonathan Cameron
> Mobile: +44-7870588074
> Email: jonathan.cameron(a)huawei.com<mailto:jonathan.cameron@huawei.com>
> From:Jammy Zhou via Linaro-open-discussions <linaro-open-discussions(a)op-lists.linaro.org>
> To:Lorenzo Pieralisi via Linaro-open-discussions <linaro-open-discussions(a)op-lists.linaro.org>
> Date:2021-08-16 06:01:50
> Subject:[Linaro-open-discussions] LOD Meeting Agenda for August 23
>
> Hi all,
>
> We're going to have the next monthly call for Linaro Open Discussions in
> one week. Please let me know if you have any topic for discussion.
>
> Thanks,
> Jammy
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Hi Jammy,
I'll be away until the 26th, but obviously that should be no barrier to topics I am less involved with as I can easily catch up later.
Thanks
Jonathan
________________________________
Jonathan Cameron
Mobile: +44-7870588074
Email: jonathan.cameron(a)huawei.com<mailto:jonathan.cameron@huawei.com>
From:Jammy Zhou via Linaro-open-discussions <linaro-open-discussions(a)op-lists.linaro.org>
To:Lorenzo Pieralisi via Linaro-open-discussions <linaro-open-discussions(a)op-lists.linaro.org>
Date:2021-08-16 06:01:50
Subject:[Linaro-open-discussions] LOD Meeting Agenda for August 23
Hi all,
We're going to have the next monthly call for Linaro Open Discussions in
one week. Please let me know if you have any topic for discussion.
Thanks,
Jammy
--
Linaro-open-discussions mailing list
https://collaborate.linaro.org/display/LOD/Linaro+Open+Discussions+Homehttps://op-lists.linaro.org/mailman/listinfo/linaro-open-discussions
Hi all,
We're going to have the next monthly call for Linaro Open Discussions in
one week. Please let me know if you have any topic for discussion.
Thanks,
Jammy
Hi,
as agreed in the LOD call today I asked Arunachalam to share his demo
set-up guidelines following his demo at LVC:
https://connect.linaro.org/resources/lvc21/lvc21-305/
He agreed to share the FVP based set-up - so that it can be
reused/refactored with QEmu by Huawei developers who are
interested.
For any questions/query let's use this public thread.
Thank you very much.
Lorenzo
On 7/22/21 1:37 PM, Song Bao Hua (Barry Song) wrote:
> Regarding squashing scheduler level, what you say is true. However,
> as long as we are changing code based on if(sched_cluster_present)
> in wake_affine path, we need to care about this.
I'm wondering if we can use SD_CLUSTER flag I introduced in my
patch 2 sent yesterday to determine if we have a cluster
sched domain instead of sched_cluster_present? So if we squash
the cluster sched domain we'll skip the logic for the sched domain,
instead of having a global flag.
>
>> If the CLS domain equals the MC domain, finally the CLS will stay and
>> MC will be destroyed. Nothing need to do then. If the CLS domain equals
>> the SMT domain, SMT will stay and we need to modify the
>> @sched_cluster_present then. But I doubt whether there is a real case
>> than CLS will be the same as SMT.
>
> It doesn't matter if there is a real hardware. What does matter is
> how the topology patch(patch 1) will parse ACPI table and whether
> ACPI has a particular flag for cluster.
>
> Thanks
> Barry
>
Barry & Yicong,
I've added this series to allow for run time control of cluster
scheduling via /proc/sys/kernel/sched_cluster_enabled.
I've defaulted the setting to off as this is probably the safest
option and will encounter the least resistance.
I've also added a SD_CLUSTER flag in patch 2. It may be handy
if we want to do any cluster specific scheduling operation in
a cluster sched domain.
This could be a follow on after the main patchset is posted.
I've tested it on my x86 machine. Wonder if you can test
it on your ARM system to make sure it works properly there.
Will appreciate your feedback and review.
Tim
Tim Chen (3):
sched: Create SDTL_SKIP flag to skip topology level
sched: Add SD_CLUSTER topology flag to cluster sched domain
sched: Add runtime knob sysctl_sched_cluster_enabled
arch/x86/kernel/smpboot.c | 8 +++++
drivers/base/arch_topology.c | 7 ++++
include/linux/sched/sd_flags.h | 7 ++++
include/linux/sched/sysctl.h | 6 ++++
include/linux/sched/topology.h | 3 +-
include/linux/topology.h | 7 ++++
kernel/sched/core.c | 1 +
kernel/sched/sched.h | 6 ++++
kernel/sched/topology.c | 58 +++++++++++++++++++++++++++++++++-
kernel/sysctl.c | 11 +++++++
10 files changed, 112 insertions(+), 2 deletions(-)
--
2.20.1
Hi,
LOC (Linaro OP-TEE Contribution) monthly meeting is planned to take place
on Thursday July22(a)17.00 (UTC+2).
Looking for topics from people. If you have anything you'd like to discuss,
please let us know.
Meeting details:
---------------
Date/time: Thursday Jul22(a)17.00 (UTC+2)
https://everytimezone.com/s/d926310d
Connection details: https://www.trustedfirmware.org/meetings/
Meeting notes: http://bit.ly/loc-notes
Regards,
Ruchika on behalf of the Linaro OP-TEE team
Hi all,
Just a kind reminder that the LOD meeting in July has been rescheduled to
23rd, Friday this week.
In this meeting, we will have a good topic from Alex Bennée to
introduce QEMU 6.1 and future work.
Please let me know if you have any other topics.
Thanks,
Jammy