Re: [RFT][PATCH v1 0/5] cpuidle: menu: Avoid discarding useful information when processing recent idle intervals

[Artem Bityutskiy <artem.bityutskiy@linux.intel.com>]

Hi,

thanks for the patches!

On Thu, 2025-02-06 at 15:21 +0100, Rafael J. Wysocki wrote:
> Hi Everyone,
> 
> This work had been triggered by a report that commit 0611a640e60a ("eventpoll:
> prefer kfree_rcu() in __ep_remove()") had caused the critical-jOPS metric of
> the SPECjbb 2015 benchmark [1] to drop by around 50% even though it generally
> reduced kernel overhead.  Indeed, it was found during further investigation
> that the total interrupt rate while running the SPECjbb workload had fallen as
> a result of that commit by 55% and the local timer interrupt rate had fallen
> by
> almost 80%.

I ran SPECjbb2015 with and it doubles critical-jOPS and basically makes it
"normal" again. Thanks!

Reported-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Tested-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>