Hi Qiao,
On 2017-08-01 00:37, qiaozhou wrote:
On 2017年07月31日 19:20, qiaozhou wrote:
<snip>
===================================================== Also apply Vikram's patch and have a test.cpu2: a53, 832MHz, cpu7: a73, 1.75Hz Without cpu_relax bodging patch ===================================================== cpu2 time | cpu2 counter | cpu7 time | cpu7 counter | ==========|==============|===========|==============| 16505| 5243| 2| 12487322| 16494| 5619| 1| 12013291| 16498| 5276| 2| 11706824| 16494| 7123| 1| 12532355| 16470| 7208| 2| 11784617| ===================================================== cpu2: a53, 832MHz, cpu7: a73, 1.75Hz With cpu_relax bodging patch: ===================================================== cpu2 time | cpu2 counter | cpu7 time | cpu7 counter | ==========|==============|===========|==============| 3991| 140714| 1| 11430528| 4018| 144371| 1| 11430528| 4034| 143250| 1| 11427011| 4330| 147345| 1| 11423583| 4752| 138273| 1| 11433241| ===================================================== It has some improvements, but not so good as Vikram's data. The big core still has much more chance to acquire lock.Thanks, Vikram
Thanks for your data! I'll check on one of our other platforms to see if I see similar behavior. This may have something to do with the event-stream on your platform or the A53 revision as Sudeep pointed out here [1] - something to check I suppose... Thanks, Vikram [1] - https://lkml.org/lkml/2016/11/21/458 -- Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, a Linux Foundation Collaborative Project
