| Message ID | Zqu6zjVMoiXwROBI@capivara (mailing list archive) |
|---|---|
| State | Mainlined, archived |
| Headers | show |
| Series | cpufreq: intel_pstate: Update Balance performance EPP for Emerald Rapids | expand |
On Thu, 2024-08-01 at 13:41 -0300, Pedro Henrique Kopper wrote: > 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 <pedro.kopper@canonical.com> Acked-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> > --- > 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 392a8000b238..c0278d023cfc 100644 > --- a/drivers/cpufreq/intel_pstate.c > +++ b/drivers/cpufreq/intel_pstate.c > @@ -3405,6 +3405,7 @@ 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,
On Thu, Aug 1, 2024 at 9:42 PM srinivas pandruvada <srinivas.pandruvada@linux.intel.com> wrote: > > On Thu, 2024-08-01 at 13:41 -0300, Pedro Henrique Kopper wrote: > > 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 <pedro.kopper@canonical.com> > Acked-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Applied as 6.11-rc material. If I'm able to send a pull request next week, I'll push this for -rc3. Otherwise, it'll be -rc4. > > --- > > 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 392a8000b238..c0278d023cfc 100644 > > --- a/drivers/cpufreq/intel_pstate.c > > +++ b/drivers/cpufreq/intel_pstate.c > > @@ -3405,6 +3405,7 @@ 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, > >
diff --git a/drivers/cpufreq/intel_pstate.c b/drivers/cpufreq/intel_pstate.c index 392a8000b238..c0278d023cfc 100644 --- a/drivers/cpufreq/intel_pstate.c +++ b/drivers/cpufreq/intel_pstate.c @@ -3405,6 +3405,7 @@ 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,
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 <pedro.kopper@canonical.com> --- drivers/cpufreq/intel_pstate.c | 1 + 1 file changed, 1 insertion(+)