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| author | Swapnil Sapkal <swapnil.sapkal@amd.com> | 2024-10-21 15:48:36 +0530 |
|---|---|---|
| committer | Mario Limonciello <mario.limonciello@amd.com> | 2024-10-28 14:54:36 -0500 |
| commit | 54ab7d7c59c9444a28b67eaa10983f86ebf73c69 (patch) | |
| tree | cc6f07b4800de6acf9d2ec42f8367e529a3f55c6 /tools/perf/scripts/python/task-analyzer.py | |
| parent | 0c411b39e4f4ce8861301fa201cb4f817751311e (diff) | |
| download | linux-54ab7d7c59c9444a28b67eaa10983f86ebf73c69.tar.gz linux-54ab7d7c59c9444a28b67eaa10983f86ebf73c69.tar.bz2 linux-54ab7d7c59c9444a28b67eaa10983f86ebf73c69.zip | |
amd-pstate: Switch to amd-pstate by default on some Server platforms
Currently the default cpufreq driver for all the AMD EPYC servers is
acpi-cpufreq. Going forward, switch to amd-pstate as the default
driver on the AMD EPYC server platforms with CPU family 0x1A or
higher. The default mode will be active mode.
Testing shows that amd-pstate with active mode and performance
governor provides comparable or better performance per-watt against
acpi-cpufreq + performance governor.
Likewise, amd-pstate with active mode and powersave governor with the
energy_performance_preference=power (EPP=255) provides comparable or
better performance per-watt against acpi-cpufreq + schedutil governor
for a wide range of workloads.
Users can still revert to using acpi-cpufreq driver on these platforms
with the "amd_pstate=disable" kernel commandline parameter.
Signed-off-by: Swapnil Sapkal <swapnil.sapkal@amd.com>
Signed-off-by: Gautham R. Shenoy <gautham.shenoy@amd.com>
Reviewed-by: Mario Limonciello <mario.limonciello@amd.com>
Link: https://lore.kernel.org/r/20241021101836.9047-3-gautham.shenoy@amd.com
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Diffstat (limited to 'tools/perf/scripts/python/task-analyzer.py')
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