On Fri, 24 Feb 2023, freak07 wrote:
Here are some measurements from a Pixel 7 Pro that´s running a kernel either with the Per-VMA locks patchset or without. If there´s interest I can provide results of other specific apps as well. Results are from consecutive cold app launches issued with "am start" command spawning the main activity of Slack Android app. https://docs.google.com/spreadsheets/d/1ktujfcyDmIJoQMWsoizGIE-0A_jMS9VMw_seehUY9s0/edit?usp=sharing There´s quite a noticeable improvement, as can be seen in the graph. The results were reproducible.
Thanks for sharing. I am not surprised - after all, per-vma locks narrow some of the performance gaps between vanilla and speculative pfs, with less complexity (albeit this is now a 35 patch series :). Thanks, Davidlohr
