On Mon, Sep 10, 2018 at 12:03:03PM +0200, Ingo Molnar wrote: > > * Jiri Olsa <jo...@redhat.com> wrote: > > > > Per-CPU threading the record session would have so many other advantages > > > as well (scalability, > > > etc.). > > > > > > Jiri did per-CPU recording patches a couple of months ago, not sure how > > > usable they are at the > > > moment? > > > > it's still usable, I can rebase it and post a branch pointer, > > the problem is I haven't been able to find a case with a real > > performance benefit yet.. ;-) > > > > perhaps because I haven't tried on server with really big cpu > > numbers > > Maybe Alexey could pick up from there? Your concept looked fairly mature to me > and I tried it on a big-CPU box back then and there were real improvements.
too bad u did not share your results, it could have been already in ;-) let me rebase/repost once more and let's see I think we could benefit from both multiple threads event reading and AIO writing for perf.data.. it could be merged together jirka
