On Tue, Sep 05, 2017 at 12:51:35AM -0700, Stephane Eranian wrote: > >> Esp the cgroup stuff is entirely untested since I simply don't know how > >> to operate that. I did run Vince's tests on it, and I think it doesn't > >> regress, but I'm near a migraine so I can't really see straight atm. > >> > >> Vince, Stephane, could you guys have a peek? > >> > > okay, I will run some tests with cgroups on my systems. > > > I ran some cgroups tests, including multiplexing and so far it appears to work > normally.
Shiny! > It is easy to create a cgroup and move a shell into it: > $ mount -t cgroup none /sys/fs/cgroups > $ cd /sys/fs/cgroups/perf_events > $ mkdir memtoy > $ cd memtoy > $ echo $$ >tasks > > At this point your shell is part of the cgroup. > Then you can use perf to monitor globally or inside the cgroup: > > $ perf stat -a -e cycles,cycles -G memtoy -I 1000 sleep 1000 > > That monitors cycles on all CPUs twice, once only when a member > of the cgroup memtoy runs, and the other globally. Right, thanks!
