From f29e9405ad8a0cd365f1748e5d37e6503c604f5b Mon Sep 17 00:00:00 2001 From: Pedro Henrique Kopper Date: Wed, 11 Sep 2024 05:15:00 +0200 Subject: [PATCH] cpufreq: intel_pstate: Update Balance performance EPP for Emerald Rapids BugLink: https://bugs.launchpad.net/bugs/2077470 On Intel Emerald Rapids machines, we ship the Energy Performance Preference (EPP) default for balance_performance as 128. However, during an internal investigation together with Intel, we have determined that 32 is a more suitable value. This leads to significant improvements in both performance and energy: POV-Ray: 32% faster | 12% less energy OpenSSL: 12% faster | energy within 1% Build Linux Kernel: 29% faster | 18% less energy Therefore, we should move the default EPP for balance_performance to 32. This is in line with what has already been done for Sapphire Rapids. Signed-off-by: Pedro Henrique Kopper Acked-by: Srinivas Pandruvada Link: https://patch.msgid.link/Zqu6zjVMoiXwROBI@capivara Signed-off-by: Rafael J. Wysocki (cherry picked from commit 64a66f4a3c89b4602ee1e6cd23b28729fc4562b3) Signed-off-by: Pedro Henrique Kopper Acked-by: Thibault Ferrante Acked-by: Manuel Diewald Signed-off-by: Stefan Bader --- drivers/cpufreq/intel_pstate.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/cpufreq/intel_pstate.c b/drivers/cpufreq/intel_pstate.c index 40d2af16249a..b8226f2cc10e 100644 --- a/drivers/cpufreq/intel_pstate.c +++ b/drivers/cpufreq/intel_pstate.c @@ -3428,6 +3428,7 @@ static const struct x86_cpu_id intel_epp_default[] = { */ X86_MATCH_VFM(INTEL_ALDERLAKE_L, HWP_SET_DEF_BALANCE_PERF_EPP(102)), X86_MATCH_VFM(INTEL_SAPPHIRERAPIDS_X, HWP_SET_DEF_BALANCE_PERF_EPP(32)), + X86_MATCH_VFM(INTEL_EMERALDRAPIDS_X, HWP_SET_DEF_BALANCE_PERF_EPP(32)), X86_MATCH_VFM(INTEL_METEORLAKE_L, HWP_SET_EPP_VALUES(HWP_EPP_POWERSAVE, 179, 64, 16)), X86_MATCH_VFM(INTEL_ARROWLAKE, HWP_SET_EPP_VALUES(HWP_EPP_POWERSAVE,