Re: [PATCH v3 0/2] sched: Minor changes for rd->overload access

From: Ingo Molnar
Date: Mon Mar 25 2024 - 10:11:53 EST



* Shrikanth Hegde <sshegde@xxxxxxxxxxxxx> wrote:

> v2 -> v3:
> - Wrapped check for value change inside ser_rd_overload_status
> as suggested by Qais.
> - Added reviewed-by tags.
>
> v1 -> v2:
> - dropped Fixes tag.
> - Added one of the perf probes in the changelog for reference.
> - Added reviewed-by tags.
>
> tl;dr
> When running workloads in large systems, it was observed that access to
> rd->overload was taking time. It would be better to check the value
> before updating since value changes less often. Patch 1/2 does that.
> With patch updates happen only if necessary. CPU Bus traffic reduced a
> bit. No significant gains in workload performance.

Could you please post this against the latest scheduler tree, ie. tip:sched/core?

Thanks,

Ingo