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Date:   Mon, 17 Oct 2022 13:27:55 +0800
From:   Huang Rui <ray.huang@amd.com>
To:     "Meng, Li (Jassmine)" <Li.Meng@amd.com>
Cc:     Shuah Khan <skhan@linuxfoundation.org>,
        "linux-pm@vger.kernel.org" <linux-pm@vger.kernel.org>,
        "Rafael J . Wysocki" <rafael.j.wysocki@intel.com>,
        "Fontenot, Nathan" <Nathan.Fontenot@amd.com>,
        "Sharma, Deepak" <Deepak.Sharma@amd.com>,
        "Deucher, Alexander" <Alexander.Deucher@amd.com>,
        "Limonciello, Mario" <Mario.Limonciello@amd.com>,
        "Su, Jinzhou (Joe)" <Jinzhou.Su@amd.com>,
        "Yuan, Perry" <Perry.Yuan@amd.com>,
        "Du, Xiaojian" <Xiaojian.Du@amd.com>,
        Viresh Kumar <viresh.kumar@linaro.org>,
        Borislav Petkov <bp@alien8.de>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH V3 4/4] Documentation: amd-pstate: Add tbench and
 gitsource test introduction
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References: <20220914061105.1982477-1-li.meng@amd.com>
 <20220914061105.1982477-5-li.meng@amd.com>
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On Wed, Sep 14, 2022 at 02:11:05PM +0800, Meng, Li (Jassmine) wrote:
> Introduce tbench and gitsource test cases design and implementation.
> Monitor cpus changes about performance and power consumption etc.
> 
> Signed-off-by: Meng Li <li.meng@amd.com>
> ---
>  Documentation/admin-guide/pm/amd-pstate.rst | 192 ++++++++++++++++++--
>  1 file changed, 173 insertions(+), 19 deletions(-)
> 
> diff --git a/Documentation/admin-guide/pm/amd-pstate.rst b/Documentation/admin-guide/pm/amd-pstate.rst
> index 8f3d30c5a0d8..6dda74ad717c 100644
> --- a/Documentation/admin-guide/pm/amd-pstate.rst
> +++ b/Documentation/admin-guide/pm/amd-pstate.rst
> @@ -409,37 +409,55 @@ Unit Tests for amd-pstate
>  
>  1. Test case decriptions
>  
> +    1). basic tests

basic -> Basic

> +
> +        Test prerequisite and basic functions for the ``amd-pstate`` driver.
> +
>          +---------+--------------------------------+------------------------------------------------------------------------------------+
>          | Index   | Functions                      | Description                                                                        |
>          +=========+================================+====================================================================================+
> -        | 0       | amd_pstate_ut_acpi_cpc_valid   || Check whether the _CPC object is present in SBIOS.                                |
> +        | 1       | amd_pstate_ut_acpi_cpc_valid   || Check whether the _CPC object is present in SBIOS.                                |
>          |         |                                ||                                                                                   |
>          |         |                                || The detail refer to `Processor Support <processor_support_>`_.                    |
>          +---------+--------------------------------+------------------------------------------------------------------------------------+
> -        | 1       | amd_pstate_ut_check_enabled    || Check whether AMD P-State is enabled.                                             |
> +        | 2       | amd_pstate_ut_check_enabled    || Check whether AMD P-State is enabled.                                             |
>          |         |                                ||                                                                                   |
>          |         |                                || AMD P-States and ACPI hardware P-States always can be supported in one processor. |
>          |         |                                | But AMD P-States has the higher priority and if it is enabled with                 |
>          |         |                                | :c:macro:`MSR_AMD_CPPC_ENABLE` or ``cppc_set_enable``, it will respond to the      |
>          |         |                                | request from AMD P-States.                                                         |
>          +---------+--------------------------------+------------------------------------------------------------------------------------+
> -        | 2       | amd_pstate_ut_check_perf       || Check if the each performance values are reasonable.                              |
> +        | 3       | amd_pstate_ut_check_perf       || Check if the each performance values are reasonable.                              |
>          |         |                                || highest_perf >= nominal_perf > lowest_nonlinear_perf > lowest_perf > 0.           |
>          +---------+--------------------------------+------------------------------------------------------------------------------------+
> -        | 3       | amd_pstate_ut_check_freq       || Check if the each frequency values and max freq when set support boost mode       |
> +        | 4       | amd_pstate_ut_check_freq       || Check if the each frequency values and max freq when set support boost mode       |
>          |         |                                | are reasonable.                                                                    |
>          |         |                                || max_freq >= nominal_freq > lowest_nonlinear_freq > min_freq > 0                   |
>          |         |                                || If boost is not active but supported, this maximum frequency will be larger than  |
>          |         |                                | the one in ``cpuinfo``.                                                            |
>          +---------+--------------------------------+------------------------------------------------------------------------------------+
>  
> +    2). Tbench test
> +
> +        Test and monitor the cpu changes when running tbench benchmark under the specified governor.
> +        These changes include desire performance, frequency, load, performance, energy etc.
> +        The specified governor is ondemand or schedutil.
> +        Tbench can also be tested on the acpi-cpufreq kernel driver for comparison.

let's align the same format in this document. 

acpi-cpufreq -> ``acpi-cpufreq``
amd-pstate-ut -> ``amd-pstate-ut``

Others look good for me.

Thanks,
Ray

> +
> +    3). Gitsource test
> +
> +        Test and monitor the cpu changes when running gitsource benchmark under the specified governor.
> +        These changes include desire performance, frequency, load, time, energy etc.
> +        The specified governor is ondemand or schedutil.
> +        Gitsource can also be tested on the acpi-cpufreq kernel driver for comparison.
> +
>  #. How to execute the tests
>  
>     We use test module in the kselftest frameworks to implement it.
>     We create amd-pstate-ut module and tie it into kselftest.(for
>     details refer to Linux Kernel Selftests [4]_).
>  
> -    1. Build
> +    1). Build
>  
>          + open the :c:macro:`CONFIG_X86_AMD_PSTATE` configuration option.
>          + set the :c:macro:`CONFIG_X86_AMD_PSTATE_UT` configuration option to M.
> @@ -449,23 +467,159 @@ Unit Tests for amd-pstate
>              $ cd linux
>              $ make -C tools/testing/selftests
>  
> -    #. Installation & Steps ::
> +        + make perf ::
> +
> +            $ cd tools/perf/
> +            $ make
> +
> +
> +    2). Installation & Steps ::
>  
>          $ make -C tools/testing/selftests install INSTALL_PATH=~/kselftest
> +        $ cp tools/perf/perf /user/bin/perf
>          $ sudo ./kselftest/run_kselftest.sh -c amd-pstate
> -        TAP version 13
> -        1..1
> -        # selftests: amd-pstate: amd-pstate-ut.sh
> -        # amd-pstate-ut: ok
> -        ok 1 selftests: amd-pstate: amd-pstate-ut.sh
> -
> -    #. Results ::
> -
> -         $ dmesg | grep "amd_pstate_ut" | tee log.txt
> -         [12977.570663] amd_pstate_ut: 1    amd_pstate_ut_acpi_cpc_valid  success!
> -         [12977.570673] amd_pstate_ut: 2    amd_pstate_ut_check_enabled   success!
> -         [12977.571207] amd_pstate_ut: 3    amd_pstate_ut_check_perf      success!
> -         [12977.571212] amd_pstate_ut: 4    amd_pstate_ut_check_freq      success!
> +
> +    3). Specified test case ::
> +
> +        $ cd ~/kselftest/amd-pstate
> +        $ sudo ./run.sh -t basic
> +        $ sudo ./run.sh -t tbench
> +        $ sudo ./run.sh -t tbench -m acpi-cpufreq
> +        $ sudo ./run.sh -t gitsource
> +        $ sudo ./run.sh -t gitsource -m acpi-cpufreq
> +        $ ./run.sh --help
> +        ./run.sh: illegal option -- -
> +        Usage: ./run.sh [OPTION...]
> +                [-h <help>]
> +                [-o <output-file-for-dump>]
> +                [-c <all: All testing,
> +                     basic: Basic testing,
> +                     tbench: Tbench testing,
> +                     gitsource: Gitsource testing.>]
> +                [-t <tbench time limit>]
> +                [-p <tbench process number>]
> +                [-l <loop times for tbench>]
> +                [-i <amd tracer interval>]
> +                [-m <comparative test: acpi-cpufreq>]
> +
> +
> +    4). Results
> +
> +        + basic
> +
> +         When you finish test, you will get the following log info ::
> +
> +          $ dmesg | grep "amd_pstate_ut" | tee log.txt
> +          [12977.570663] amd_pstate_ut: 1    amd_pstate_ut_acpi_cpc_valid  success!
> +          [12977.570673] amd_pstate_ut: 2    amd_pstate_ut_check_enabled   success!
> +          [12977.571207] amd_pstate_ut: 3    amd_pstate_ut_check_perf      success!
> +          [12977.571212] amd_pstate_ut: 4    amd_pstate_ut_check_freq      success!
> +
> +        + tbench
> +
> +         When you finish test, you will get selftest.tbench.csv and png images.
> +         The selftest.tbench.csv file contains the raw data and the drop of the comparative test.
> +         The png images shows the performance, energy and performan per watt of each test.
> +         Open selftest.tbench.csv :
> +
> +         +-------------------------------------------------+--------------+----------+---------+----------+-------------+---------+----------------------+
> +         + Governor                                        | Round        | Des-perf | Freq    | Load     | Performance | Energy  | Performance Per Watt |
> +         +-------------------------------------------------+--------------+----------+---------+----------+-------------+---------+----------------------+
> +         + Unit                                            |              |          | GHz     |          | MB/s        | J       | MB/J                 |
> +         +=================================================+==============+==========+=========+==========+=============+=========+======================+
> +         + amd-pstate-ondemand                             | 1            |          |         |          | 2504.05     | 1563.67 | 158.5378             |
> +         +-------------------------------------------------+--------------+----------+---------+----------+-------------+---------+----------------------+
> +         + amd-pstate-ondemand                             | 2            |          |         |          | 2243.64     | 1430.32 | 155.2941             |
> +         +-------------------------------------------------+--------------+----------+---------+----------+-------------+---------+----------------------+
> +         + amd-pstate-ondemand                             | 3            |          |         |          | 2183.88     | 1401.32 | 154.2860             |
> +         +-------------------------------------------------+--------------+----------+---------+----------+-------------+---------+----------------------+
> +         + amd-pstate-ondemand                             | Average      |          |         |          | 2310.52     | 1465.1  | 156.1268             |
> +         +-------------------------------------------------+--------------+----------+---------+----------+-------------+---------+----------------------+
> +         + amd-pstate-schedutil                            | 1            | 165.329  | 1.62257 | 99.798   | 2136.54     | 1395.26 | 151.5971             |
> +         +-------------------------------------------------+--------------+----------+---------+----------+-------------+---------+----------------------+
> +         + amd-pstate-schedutil                            | 2            | 166      | 1.49761 | 99.9993  | 2100.56     | 1380.5  | 150.6377             |
> +         +-------------------------------------------------+--------------+----------+---------+----------+-------------+---------+----------------------+
> +         + amd-pstate-schedutil                            | 3            | 166      | 1.47806 | 99.9993  | 2084.12     | 1375.76 | 149.9737             |
> +         +-------------------------------------------------+--------------+----------+---------+----------+-------------+---------+----------------------+
> +         + amd-pstate-schedutil                            | Average      | 165.776  | 1.53275 | 99.9322  | 2107.07     | 1383.84 | 150.7399             |
> +         +-------------------------------------------------+--------------+----------+---------+----------+-------------+---------+----------------------+
> +         + acpi-cpufreq-ondemand                           | 1            |          |         |          | 2529.9      | 1564.4  | 160.0997             |
> +         +-------------------------------------------------+--------------+----------+---------+----------+-------------+---------+----------------------+
> +         + acpi-cpufreq-ondemand                           | 2            |          |         |          | 2249.76     | 1432.97 | 155.4297             |
> +         +-------------------------------------------------+--------------+----------+---------+----------+-------------+---------+----------------------+
> +         + acpi-cpufreq-ondemand                           | 3            |          |         |          | 2181.46     | 1406.88 | 153.5060             |
> +         +-------------------------------------------------+--------------+----------+---------+----------+-------------+---------+----------------------+
> +         + acpi-cpufreq-ondemand                           | Average      |          |         |          | 2320.37     | 1468.08 | 156.4741             |
> +         +-------------------------------------------------+--------------+----------+---------+----------+-------------+---------+----------------------+
> +         + acpi-cpufreq-schedutil                          | 1            |          |         |          | 2137.64     | 1385.24 | 152.7723             |
> +         +-------------------------------------------------+--------------+----------+---------+----------+-------------+---------+----------------------+
> +         + acpi-cpufreq-schedutil                          | 2            |          |         |          | 2107.05     | 1372.23 | 152.0138             |
> +         +-------------------------------------------------+--------------+----------+---------+----------+-------------+---------+----------------------+
> +         + acpi-cpufreq-schedutil                          | 3            |          |         |          | 2085.86     | 1365.35 | 151.2433             |
> +         +-------------------------------------------------+--------------+----------+---------+----------+-------------+---------+----------------------+
> +         + acpi-cpufreq-schedutil                          | Average      |          |         |          | 2110.18     | 1374.27 | 152.0136             |
> +         +-------------------------------------------------+--------------+----------+---------+----------+-------------+---------+----------------------+
> +         + acpi-cpufreq-ondemand VS acpi-cpufreq-schedutil | Comprison(%) |          |         |          | -9.0584     | -6.3899 | -2.8506              |
> +         +-------------------------------------------------+--------------+----------+---------+----------+-------------+---------+----------------------+
> +         + amd-pstate-ondemand VS amd-pstate-schedutil     | Comprison(%) |          |         |          | 8.8053      | -5.5463 | -3.4503              |
> +         +-------------------------------------------------+--------------+----------+---------+----------+-------------+---------+----------------------+
> +         + acpi-cpufreq-ondemand VS amd-pstate-ondemand    | Comprison(%) |          |         |          | -0.4245     | -0.2029 | -0.2219              |
> +         +-------------------------------------------------+--------------+----------+---------+----------+-------------+---------+----------------------+
> +         + acpi-cpufreq-schedutil VS amd-pstate-schedutil  | Comprison(%) |          |         |          | -0.1473     | 0.6963  | -0.8378              |
> +         +-------------------------------------------------+--------------+----------+---------+----------+-------------+---------+----------------------+
> +
> +        + gitsource
> +
> +         When you finish test, you will get selftest.gitsource.csv and png images.
> +         The selftest.gitsource.csv file contains the raw data and the drop of the comparative test.
> +         The png images shows the performance, energy and performan per watt of each test.
> +         Open selftest.gitsource.csv :
> +
> +         +-------------------------------------------------+--------------+----------+----------+----------+-------------+---------+----------------------+
> +         + Governor                                        | Round        | Des-perf | Freq     | Load     | Time        | Energy  | Performance Per Watt |
> +         +-------------------------------------------------+--------------+----------+----------+----------+-------------+---------+----------------------+
> +         + Unit                                            |              |          | GHz      |          | s           | J       | 1/J                  |
> +         +=================================================+==============+==========+==========+==========+=============+=========+======================+
> +         + amd-pstate-ondemand                             | 1            | 50.119   | 2.10509  | 23.3076  | 475.69      | 865.78  | 0.001155027          |
> +         +-------------------------------------------------+--------------+----------+----------+----------+-------------+---------+----------------------+
> +         + amd-pstate-ondemand                             | 2            | 94.8006  | 1.98771  | 56.6533  | 467.1       | 839.67  | 0.001190944          |
> +         +-------------------------------------------------+--------------+----------+----------+----------+-------------+---------+----------------------+
> +         + amd-pstate-ondemand                             | 3            | 76.6091  | 2.53251  | 43.7791  | 467.69      | 855.85  | 0.001168429          |
> +         +-------------------------------------------------+--------------+----------+----------+----------+-------------+---------+----------------------+
> +         + amd-pstate-ondemand                             | Average      | 73.8429  | 2.20844  | 41.2467  | 470.16      | 853.767 | 0.001171279          |
> +         +-------------------------------------------------+--------------+----------+----------+----------+-------------+---------+----------------------+
> +         + amd-pstate-schedutil                            | 1            | 165.919  | 1.62319  | 98.3868  | 464.17      | 866.8   | 0.001153668          |
> +         +-------------------------------------------------+--------------+----------+----------+----------+-------------+---------+----------------------+
> +         + amd-pstate-schedutil                            | 2            | 165.97   | 1.31309  | 99.5712  | 480.15      | 880.4   | 0.001135847          |
> +         +-------------------------------------------------+--------------+----------+----------+----------+-------------+---------+----------------------+
> +         + amd-pstate-schedutil                            | 3            | 165.973  | 1.28448  | 99.9252  | 481.79      | 867.02  | 0.001153375          |
> +         +-------------------------------------------------+--------------+----------+----------+----------+-------------+---------+----------------------+
> +         + amd-pstate-schedutil                            | Average      | 165.954  | 1.40692  | 99.2944  | 475.37      | 871.407 | 0.001147569          |
> +         +-------------------------------------------------+--------------+----------+----------+----------+-------------+---------+----------------------+
> +         + acpi-cpufreq-ondemand                           | 1            |          |          |          | 2379.62     | 742.96  | 0.001345967          |
> +         +-------------------------------------------------+--------------+----------+----------+----------+-------------+---------+----------------------+
> +         + acpi-cpufreq-ondemand                           | 2            |          |          |          | 441.74      | 817.49  | 0.001223256          |
> +         +-------------------------------------------------+--------------+----------+----------+----------+-------------+---------+----------------------+
> +         + acpi-cpufreq-ondemand                           | 3            |          |          |          | 455.48      | 820.01  | 0.001219497          |
> +         +-------------------------------------------------+--------------+----------+----------+----------+-------------+---------+----------------------+
> +         + acpi-cpufreq-ondemand                           | Average      |          |          |          | 425.613     | 793.487 | 0.001260260          |
> +         +-------------------------------------------------+--------------+----------+----------+----------+-------------+---------+----------------------+
> +         + acpi-cpufreq-schedutil                          | 1            |          |          |          | 459.69      | 838.54  | 0.001192548          |
> +         +-------------------------------------------------+--------------+----------+----------+----------+-------------+---------+----------------------+
> +         + acpi-cpufreq-schedutil                          | 2            |          |          |          | 466.55      | 830.89  | 0.001203528          |
> +         +-------------------------------------------------+--------------+----------+----------+----------+-------------+---------+----------------------+
> +         + acpi-cpufreq-schedutil                          | 3            |          |          |          | 470.38      | 837.32  | 0.001194286          |
> +         +-------------------------------------------------+--------------+----------+----------+----------+-------------+---------+----------------------+
> +         + acpi-cpufreq-schedutil                          | Average      |          |          |          | 465.54      | 835.583 | 0.001196769          |
> +         +-------------------------------------------------+--------------+----------+----------+----------+-------------+---------+----------------------+
> +         + acpi-cpufreq-ondemand VS acpi-cpufreq-schedutil | Comprison(%) |          |          |          | 9.3810      | 5.3051  | -5.0379              |
> +         +-------------------------------------------------+--------------+----------+----------+----------+-------------+---------+----------------------+
> +         + amd-pstate-ondemand VS amd-pstate-schedutil     | Comprison(%) | 124.7392 | -36.2934 | 140.7329 | 1.1081      | 2.0661  | -2.0242              |
> +         +-------------------------------------------------+--------------+----------+----------+----------+-------------+---------+----------------------+
> +         + acpi-cpufreq-ondemand VS amd-pstate-ondemand    | Comprison(%) |          |          |          | 10.4665     | 7.5968  | -7.0605              |
> +         +-------------------------------------------------+--------------+----------+----------+----------+-------------+---------+----------------------+
> +         + acpi-cpufreq-schedutil VS amd-pstate-schedutil  | Comprison(%) |          |          |          | 2.1115      | 4.2873  | -4.1110              |
> +         +-------------------------------------------------+--------------+----------+----------+----------+-------------+---------+----------------------+
>  
>  Reference
>  ===========
> -- 
> 2.34.1
>