BM/pstate: Fix balance_performance EPP check on EMR - #593
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intel_pstate_tests08 sets energy_performance_preference to
balance_performance and then verifies the EPP request value reported by
x86_energy_perf_policy. The test currently treats only Sapphire Rapids
model 143 as using EPP 32, so Emerald Rapids model 207 falls back to the
legacy expected value 128.
The upstream Linux change 64a66f4a3c89 ("cpufreq: intel_pstate: Update
Balance performance EPP for Emerald Rapids") changed Emerald Rapids to
use the same balance_performance EPP value as Sapphire Rapids, 32. Update
the LKVS expectation for model 207 to match the kernel behavior.
Signed-off-by: Yijia Wang <[email protected]>
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Summary
intel_pstate_tests08verifies the EPP request value after settingenergy_performance_preferencetobalance_performance.The test currently expects EPP value
32only on Sapphire Rapids(model 143). On Emerald Rapids (model 207), it falls back to the legacy
expected value
128, but the current kernel behavior is to use32.The upstream Linux change 64a66f4a3c89 ("cpufreq: intel_pstate: Update
Balance performance EPP for Emerald Rapids") changed Emerald Rapids to
use the same
balance_performanceEPP value as Sapphire Rapids.Update the LKVS expectation for model 207 to match the kernel behavior.
Validation
I have done:
git diff --check origin/main..HEADbash -n BM/pstate/intel_pstate_tests.shscripts/checkpatch.pl --strict 0001-BM-pstate-Fix-balance_performance-EPP-check-on-EMR.patch./intel_pstate_tests.sh -t verify_gov_powersave_epp_balance_perfon an Emerald Rapids system, model 207. Passed.
The EMR run reported CPU model 207, read EPP value
32, and completedwith
check_epp_req PASS.Signed-off-by: Yijia Wang [email protected]