diff options
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/admin-guide/pm/amd-pstate.rst | 194 |
1 files changed, 174 insertions, 20 deletions
diff --git a/Documentation/admin-guide/pm/amd-pstate.rst b/Documentation/admin-guide/pm/amd-pstate.rst index 06e23538f79c..5376d53faaa8 100644 --- a/Documentation/admin-guide/pm/amd-pstate.rst +++ b/Documentation/admin-guide/pm/amd-pstate.rst @@ -405,37 +405,55 @@ Unit Tests for amd-pstate 1. Test case decriptions + 1). Basic tests + + 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. + + 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 + 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. @@ -445,23 +463,159 @@ 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 /usr/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 =========== |