Sumeet R Pawnikar (sumeet.r.pawnikar@intel.com) just uploaded a new patch set to gerrit, which you can find at https://review.coreboot.org/16596
-gerrit
commit e9b42b75bb15bff4b7c8849aeb585fe4a9bf6e3b Author: Sumeet Pawnikar sumeet.r.pawnikar@intel.com Date: Tue Sep 13 11:54:03 2016 +0530
mainboards/apollolake: Set RAPL power limit PL1 value to 12W.
This patch sets tuned RAPL power limit PL1 value to 12W in acpi/dptf.asl for RAPL MSR register. With PL1 as 12W for WebGL and stream case, we measured SoC power reaching upto 6W. Above 12W PL1 value, we observed that Soc power going above 6W. With PL1 as 12W, system is able to leverage full TDP capacity.
BUG=chrome-os-partner:56524 TEST=Built, booted on reef and verifed the package power with heavy workload.
Change-Id: I8185ce890f27e29bc138ea568af536bc274fe7b8 Signed-off-by: Sumeet Pawnikar sumeet.r.pawnikar@intel.com --- src/mainboard/google/reef/acpi/dptf.asl | 2 +- src/mainboard/intel/amenia/acpi/dptf.asl | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/src/mainboard/google/reef/acpi/dptf.asl b/src/mainboard/google/reef/acpi/dptf.asl index 33d9b4d..1f9bfb2 100644 --- a/src/mainboard/google/reef/acpi/dptf.asl +++ b/src/mainboard/google/reef/acpi/dptf.asl @@ -73,7 +73,7 @@ Name (MPPC, Package () Package () { /* Power Limit 1 */ 0, /* PowerLimitIndex, 0 for Power Limit 1 */ 1600, /* PowerLimitMinimum */ - 15000, /* PowerLimitMaximum */ + 12000, /* PowerLimitMaximum */ 1000, /* TimeWindowMinimum */ 1000, /* TimeWindowMaximum */ 200 /* StepSize */ diff --git a/src/mainboard/intel/amenia/acpi/dptf.asl b/src/mainboard/intel/amenia/acpi/dptf.asl index 35bbecb..a75d668 100644 --- a/src/mainboard/intel/amenia/acpi/dptf.asl +++ b/src/mainboard/intel/amenia/acpi/dptf.asl @@ -73,7 +73,7 @@ Name (MPPC, Package () Package () { /* Power Limit 1 */ 0, /* PowerLimitIndex, 0 for Power Limit 1 */ 1600, /* PowerLimitMinimum */ - 15000, /* PowerLimitMaximum */ + 12000, /* PowerLimitMaximum */ 1000, /* TimeWindowMinimum */ 1000, /* TimeWindowMaximum */ 200 /* StepSize */