On Wed, 2023-12-13 at 18:13 +0530, Maramaina Naresh wrote: > > External email : Please do not click links or open attachments until > you have verified the sender or the content. > Register ufs driver to CPU latency PM QoS framework to improve > ufs device random io performance. > > PM QoS initialization will insert new QoS request into the CPU > latency QoS list with the maximum latency PM_QOS_DEFAULT_VALUE > value. > > UFS driver will vote for performance mode on scale up and power > save mode for scale down. > > If clock scaling feature is not enabled then voting will be based > on clock on or off condition. > > Provided sysfs interface to enable/disable PM QoS feature. > > tiotest benchmark tool io performance results on sm8550 platform: > > 1. Without PM QoS support > Type (Speed in) | Average of 18 iterations > Random Write(IPOS) | 41065.13 > Random Read(IPOS) | 37101.3 > > 2. With PM QoS support > Type (Speed in) | Average of 18 iterations > Random Write(IPOS) | 46784.9 > Random Read(IPOS) | 42943.4 > (Improvement with PM QoS = ~15%). > Reviewed-by: Peter Wang <peter.wang@xxxxxxxxxxxx>
