On Tue, Sep 05, 2017 at 01:17:39PM +0300, Alexey Budankov wrote: > However we can't completely get rid of whole tree iterations because of > inheritance code on forks in perf_event_init_context() here:
Right, fork() / inherit needs to iterate the full thing, nothing to be done about that. I'll go make proper patches for that timekeeping rewrite and then have a look at your patches.