On Tue, Apr 20, 2021 at 01:34:40AM -0700, Stephane Eranian wrote: > The sampling approach will certainly incur more overhead and be at > risk of losing the ability to > reconstruct the total counter per-cgroup, unless you set the period > for SW_CGROUP_SWITCHES to > 1. But then, you run the risk of losing samples if the buffer is full > or sampling is throtlled. > In some scenarios, we believe the number of context switches between > cgroup could be quite high (>> 1000/s). > And on top you would have to add the processing of the samples to > extract the counts per cgroup. That would require > a synthesis on cgroup on perf record and some post-processing on perf > report. We are interested in using the data live > to make some policy decisions, so a counting approach with perf stat > will always be best.
Can you please configure your MUA to sanely (re)flow text? The above random line-breaks are *so* painful to read.