ACK: [SRU][mantic:linux][PATCH 0/1] performance: Scheduler: Improve cache bouncing on tg->load_avg
Stefan Bader
stefan.bader at canonical.com
Fri Mar 1 08:47:37 UTC 2024
On 27.02.24 15:07, Philip Cox wrote:
>
>
> BugLink: BugLink: https://bugs.launchpad.net/bugs/2053251
>
> SRU Justification:
>
> [Impact]
> On high core count systems, the updating of the load average can happen so
> often that it impacts performance.
>
> [Fix]
> Reduce the updating of the load average to at most once per millisecond.
>
>
> [Test Plan]
> I have tested this patch, as has Intel.
>
> [Where problems could occur]
> The risk for regression is low as it is a fairly targetted change, and is just reducing the number
> of times that the load average is updated.
>
> --
>
> Aaron Lu (1):
> sched/fair: Ratelimit update to tg->load_avg
>
> kernel/sched/fair.c | 13 ++++++++++++-
> kernel/sched/sched.h | 1 +
> 2 files changed, 13 insertions(+), 1 deletion(-)
>
Acked-by: Stefan Bader <stefan.bader at canonical.com>
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