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| author | Jeremy Compostella <jeremy.compostella@intel.com> | 2022-07-21 14:13:41 -0700 |
|---|---|---|
| committer | Martin L Roth <gaumless@gmail.com> | 2022-08-13 16:44:35 +0000 |
| commit | 54688b48d23ec6307740857ba46ce0cc109238f3 (patch) | |
| tree | f0d5d94e1bb64e7b6ecbf32adf48206d80e3dff5 /src/mainboard/google/brya | |
| parent | 6908e31ce689e3b6dbb5f698b07f41a708c53fbd (diff) | |
mb/google/brya: Use default EPP of 50% for skolas
A power and performance analysis performed on Alder Lake demonstrated
that with an EPP (Energy Performance Preference) at 50% along with
EET (Energy Efficient Turbo) disabled, the overall SoC performance are
similar or better and the SoC uses less power.
For instance some browser benchmark results improved by 2% and some
multi-core tests by 4% while at the same time power consumption
lowered by approximately 7.6%.
Similar results are observed on Raptor Lake.
BRANCH=firmware-brya-14505.B
BUG=b:240669428
TEST=verify that EPP is back to the by default 50% setting
`iotools rdmsr 0 0x774'
Signed-off-by: Jeremy Compostella <jeremy.compostella@intel.com>
Change-Id: I735ad9d88c7bf54def7a23b75abc4e89a213fb61
Reviewed-on: https://review.coreboot.org/c/coreboot/+/66282
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Zhixing Ma <zhixing.ma@intel.com>
Reviewed-by: Selma Bensaid <selma.bensaid@intel.com>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Diffstat (limited to 'src/mainboard/google/brya')
| -rw-r--r-- | src/mainboard/google/brya/variants/baseboard/skolas/devicetree.cb | 4 |
1 files changed, 0 insertions, 4 deletions
diff --git a/src/mainboard/google/brya/variants/baseboard/skolas/devicetree.cb b/src/mainboard/google/brya/variants/baseboard/skolas/devicetree.cb index 039ba4c2ce..c861c9b84c 100644 --- a/src/mainboard/google/brya/variants/baseboard/skolas/devicetree.cb +++ b/src/mainboard/google/brya/variants/baseboard/skolas/devicetree.cb @@ -126,10 +126,6 @@ chip soc/intel/alderlake }, }" - # set EPP to 45%: 45 * 256/100 = 115 = 0x73 - register "enable_energy_perf_pref" = "true" - register "energy_perf_pref_value" = "0x73" - device domain 0 on device ref igpu on end device ref dtt on end |