linux-kernel - Re: [PATCH V8 0/4] Add unit test module for AMD P-State driver

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Date:   Thu, 26 May 2022 09:44:13 -0600
From:   Shuah Khan <skhan@...uxfoundation.org>
To:     Meng Li <li.meng@....com>, Huang Rui <ray.huang@....com>,
        linux-pm@...r.kernel.org
Cc:     "Rafael J . Wysocki" <rafael.j.wysocki@...el.com>,
        Nathan Fontenot <nathan.fontenot@....com>,
        Deepak Sharma <deepak.sharma@....com>,
        Alex Deucher <alexander.deucher@....com>,
        Mario Limonciello <mario.limonciello@....com>,
        Jinzhou Su <Jinzhou.Su@....com>,
        Perry Yuan <Perry.Yuan@....com>,
        Xiaojian Du <Xiaojian.Du@....com>,
        Viresh Kumar <viresh.kumar@...aro.org>,
        Borislav Petkov <bp@...en8.de>, linux-kernel@...r.kernel.org,
        Shuah Khan <skhan@...uxfoundation.org>
Subject: Re: [PATCH V8 0/4] Add unit test module for AMD P-State driver

On 5/25/22 9:47 PM, Meng Li wrote:
> Hi all:
> 
> AMD P-State unit test(amd-pstate-ut) is a kernel module for testing
> the functions of amd-pstate driver.
> It could import as a module to launch some test tasks.
> 1) It can help all users to verify their processor support (SBIOS/
> Firmware or Hardware).
> 2) Kernel can have a basic function test to avoid the kernel regression
> during the update.
> 3) We can introduce more functional or performance tests to align the
> together, it will benefit power and performance scale optimization.
> 
> We upstream out AMD P-state driver into Linux kernel and use this unit
> test module to verify the required conditions and basic functions of
> amd-pstate before integration test.
> 
> We use test module in the kselftest frameworks to implement it.
> We create amd-pstate-ut module and tie it into kselftest.
> 
> For example: The test case aput_acpi_cpc is used to check whether the
> _CPC object is exist in SBIOS.
> The amd-pstate initialization will fail if the _CPC in ACPI SBIOS is not
> existed at the detected processor, so it is a necessary condition.
> 
> At present, it only implements the basic framework and some simple test
> cases.
> 
> TODO : 1) we will add more test cases to improve the depth and coverage of
> the test. E.X. use the script to trigger the tbench, gitsource, kernbench,
> netperf, speedometer, and etc. testing and monitor the cpu frequency and
> performance goals change, power consumption at runtime.
> 
> Please check the documentation amd-pstate.rst for details of the test steps.
> 
> See patch series in below git repo:
> V1: https://lore.kernel.org/linux-pm/20220323071502.2674156-1-li.meng@amd.com/
> V2: https://lore.kernel.org/lkml/20220413090510.4039589-1-li.meng@amd.com/
> V3: https://lore.kernel.org/lkml/20220421074152.599419-1-li.meng@amd.com/
> V4: https://lore.kernel.org/lkml/20220427135315.3447550-1-li.meng@amd.com/
> V5: https://lore.kernel.org/lkml/20220505022913.329259-1-li.meng@amd.com/
> V6: https://lore.kernel.org/lkml/20220519134737.359290-1-li.meng@amd.com/
> V7: https://lore.kernel.org/lkml/20220522115423.1147282-1-li.meng@amd.com/
> 

> 
> Changes from V7 -> V8:
> - cpufreq: amd-pstate:
> - - amend commit message.
> - - amend module description.
> - Documentation: amd-pstate:
> - - amend commit message.
> - - Remove the personal data.
> 

Looks good to me. Thank you.

Rafael, Viresh,

How do you want to handle this patch series? We are in merge window
and this would be for Linux 5.20 based on the changes and content.

Would you like to take the entire patch series through your tree, you
have my Ack(s) and Reviewed-by(s)

thanks,
-- Shuah