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

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Date:   Thu, 9 Jun 2022 14:28:27 -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 5/26/22 9:44 AM, Shuah Khan wrote:
> 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)
> 

Picking this back up since rc1 is out. How do we want to handle this patch
series?

thanks,
-- Shuah