Sukumar Ghorai has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/79386?usp=email )
Change subject: mb/google/{rex,ovis}: epp set to 45% for mtl performance expectation ......................................................................
mb/google/{rex,ovis}: epp set to 45% for mtl performance expectation
Default EPP is 50% and is not aggressive enough for MTL performance expectation in balance_performance mode. /sys/devices/system/cpu/cpu0/cpufreq/energy_performance_preference balance_performance # iotools rdmsr 0 0x774 0x0000000080003f06 EPP=45% is giving the required performance in MTL.
Change-Id: I1953994cdb4e9363fdd4b4728e3e5236276c06c8 Signed-off-by: Sukumar Ghorai sukumar.ghorai@intel.com --- M src/mainboard/google/rex/variants/baseboard/ovis/devicetree.cb M src/mainboard/google/rex/variants/baseboard/rex/devicetree.cb 2 files changed, 8 insertions(+), 0 deletions(-)
git pull ssh://review.coreboot.org:29418/coreboot refs/changes/86/79386/1
diff --git a/src/mainboard/google/rex/variants/baseboard/ovis/devicetree.cb b/src/mainboard/google/rex/variants/baseboard/ovis/devicetree.cb index 3f75b70..aace5ad 100644 --- a/src/mainboard/google/rex/variants/baseboard/ovis/devicetree.cb +++ b/src/mainboard/google/rex/variants/baseboard/ovis/devicetree.cb @@ -65,6 +65,10 @@ register "sagv_freq_mhz[3]" = "6400" register "sagv_gear[3]" = "4"
+ # set EPP to 45%: 45 * 256/100 = 115 = 0x73 + register "enable_energy_perf_pref" = "true" + register "energy_perf_pref_value" = "0x73" + # Set on-board graphics as primary display register "skip_ext_gfx_scan" = "1"
diff --git a/src/mainboard/google/rex/variants/baseboard/rex/devicetree.cb b/src/mainboard/google/rex/variants/baseboard/rex/devicetree.cb index 162bb64..9f86840 100644 --- a/src/mainboard/google/rex/variants/baseboard/rex/devicetree.cb +++ b/src/mainboard/google/rex/variants/baseboard/rex/devicetree.cb @@ -62,6 +62,10 @@ register "sagv_freq_mhz[3]" = "6400" register "sagv_gear[3]" = "4"
+ # set EPP to 45%: 45 * 256/100 = 115 = 0x73 + register "enable_energy_perf_pref" = "true" + register "energy_perf_pref_value" = "0x73" + # Set on-board graphics as primary display register "skip_ext_gfx_scan" = "1"