From: Shrikanth Hegde <sshegde@linux.ibm.com>
To: Peter Zijlstra <peterz@infradead.org>
Cc: linux-kernel@vger.kernel.org, mingo@kernel.org,
juri.lelli@redhat.com, vincent.guittot@linaro.org,
yury.norov@gmail.com, kprateek.nayak@amd.com, iii@linux.ibm.com,
corbet@lwn.net, meted@linux.ibm.com, ynorov@nvidia.com,
tglx@kernel.org, gregkh@linuxfoundation.org, pbonzini@redhat.com,
seanjc@google.com, vschneid@redhat.com, huschle@linux.ibm.com,
rostedt@goodmis.org, dietmar.eggemann@arm.com,
maddy@linux.ibm.com, srikar@linux.ibm.com, hdanton@sina.com,
chleroy@kernel.org, vineeth@bitbyteword.org, frederic@kernel.org,
arighi@nvidia.com, pauld@redhat.com, christian.loehle@arm.com,
tj@kernel.org, tommaso.cucinotta@gmail.com, maz@kernel.org,
rafael@kernel.org, rdunlap@infradead.org, kernellwp@gmail.com,
linux-doc@vger.kernel.org, jgross@suse.com,
virtualization@lists.linux.dev, sunlightlinux@gmail.com
Subject: Re: [PATCH v13 09/13] sched/debug: Add migration stats due to non preferred CPUs
Date: Fri, 25 Sep 2026 15:19:40 +0530 [thread overview]
Message-ID: <e152585c-aa6c-4e50-b427-7683e28f8584@linux.ibm.com> (raw)
In-Reply-To: <20260925075134.GH4121339@noisy.programming.kicks-ass.net>
Hi Peter.
On 9/25/26 1:21 PM, Peter Zijlstra wrote:
> On Wed, Sep 09, 2026 at 07:26:13PM +0530, Shrikanth Hegde wrote:
>> Add a new stat,
>> - nr_migrations_cpu_non_preferred: number of migrations happened since
>> a CPU was marked as non preferred due to high steal time.
>
> My reading of the below code ends up with something like:
>
> - nr_migrations_cpu_non_preferred: number of push migrations while the
> CPU is non-preferred.
>
> Hmm?
Indeed. Will update the changelog.
next prev parent reply other threads:[~2026-09-25 9:50 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-09 13:56 [PATCH v13 00/13] sched, steal_governor: Introduce preferred CPUs and steal-driven vCPU backoff Shrikanth Hegde
2026-09-09 13:56 ` [PATCH v13 01/13] sched/cputime: Add kcpustat_field_total helper Shrikanth Hegde
2026-09-09 13:56 ` [PATCH v13 02/13] cpumask: Introduce cpumask_intersects_and Shrikanth Hegde
2026-09-09 16:03 ` Yury Norov
2026-09-09 13:56 ` [PATCH v13 03/13] sched/docs: Document cpu_preferred_mask and Preferred CPU concept Shrikanth Hegde
2026-09-09 13:56 ` [PATCH v13 04/13] cpumask: Introduce cpu_preferred_mask Shrikanth Hegde
2026-09-09 13:56 ` [PATCH v13 05/13] sysfs: Add preferred CPU file Shrikanth Hegde
2026-09-09 13:56 ` [PATCH v13 06/13] sched/core: Try to use a preferred CPU in is_cpu_allowed Shrikanth Hegde
2026-09-25 7:43 ` Peter Zijlstra
2026-09-25 9:16 ` Shrikanth Hegde
2026-09-09 13:56 ` [PATCH v13 07/13] sched/fair: Load balance only among preferred CPUs Shrikanth Hegde
2026-09-09 17:19 ` Yury Norov
2026-09-09 13:56 ` [PATCH v13 08/13] sched/core: Push current task from non preferred CPU Shrikanth Hegde
2026-09-25 7:49 ` Peter Zijlstra
2026-09-25 9:47 ` Shrikanth Hegde
2026-09-09 13:56 ` [PATCH v13 09/13] sched/debug: Add migration stats due to non preferred CPUs Shrikanth Hegde
2026-09-25 7:51 ` Peter Zijlstra
2026-09-25 9:49 ` Shrikanth Hegde [this message]
2026-09-09 13:56 ` [PATCH v13 10/13] virt: Introduce steal governor driver Shrikanth Hegde
2026-09-09 13:56 ` [PATCH v13 11/13] virt/steal_governor: Add control knobs for handling steal values Shrikanth Hegde
2026-09-09 13:56 ` [PATCH v13 12/13] virt/steal_governor: Implement steal_governor policy loop Shrikanth Hegde
2026-09-09 13:56 ` [PATCH v13 13/13] virt/steal_governor: Enable the driver Shrikanth Hegde
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