linux-kernel - Re: [PATCH v6 0/4] Add support for AArch64 AMUv1-based arch_freq_get_on

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Message-ID: <ZowdalL3DfkHtaCg@arm.com>
Date: Mon, 8 Jul 2024 18:10:02 +0100
From: Catalin Marinas <catalin.marinas@....com>
To: Beata Michalska <beata.michalska@....com>
Cc: linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	ionela.voinescu@....com, sudeep.holla@....com, will@...nel.org,
	vincent.guittot@...aro.org, vanshikonda@...amperecomputing.com,
	sumitg@...dia.com, yang@...amperecomputing.com,
	lihuisong@...wei.com, viresh.kumar@...aro.org, rafael@...nel.org
Subject: Re: [PATCH v6 0/4] Add support for AArch64 AMUv1-based
 arch_freq_get_on_cpu

Hi Beata,

On Mon, Jun 03, 2024 at 09:21:50AM +0100, Beata Michalska wrote:
> Introducing arm64 specific version of arch_freq_get_on_cpu, cashing on
> existing implementation for FIE and AMUv1 support: the frequency scale
> factor, updated on each sched tick, serves as a base for retrieving
> the frequency for a given CPU, representing an average frequency
> reported between the ticks - thus its accuracy is limited.
> 
> The changes have been rather lightly (due to some limitations) tested on
> an FVP model. Note that some small discrepancies have been observed while
> testing (on the model) and this is currently being investigated, though it
> should not have any significant impact on the overall results.

What's the plan with this series? Are you still investigating those
discrepancies or is it good to go?

-- 
Catalin