Add per-cpu PM QoS support for ufs. This improves random io performance by 20% for ufs. tiotest benchmark tool io performance results on sm8550 platform: 1. Without PM QoS support Type (Speed in) | Average of 6 iterations Random Write(IPOS) | 32201 Random Read(IPOS) | 32201 2. With PM QoS support Type (Speed in) | Average of 6 iterations Random Write(IPOS) | 40833.5 Random Read(IPOS) | 40833.5 (Improvement % with PM QoS = ~20%). Maramaina Naresh (4): dt-bindings: ufs: qcom: Add qos property ufs: ufs-qcom: Add per-cpu PM QoS support for ufs ufs: ufs-qcom: Add per-cpu PM QoS vote support for ufs arm64: dts: qcom: sm8550: Add per-cpu PM QoS support for ufs .../devicetree/bindings/ufs/qcom,ufs.yaml | 16 + arch/arm64/boot/dts/qcom/sm8550.dtsi | 9 + drivers/ufs/host/ufs-qcom.c | 340 ++++++++++++++++++++- drivers/ufs/host/ufs-qcom.h | 37 +++ 4 files changed, 401 insertions(+), 1 deletion(-) -- 2.7.4
