Re: [PATCHSET 0/9] perf: Improve cgroup profiling (v6)

[Namhyung Kim]

Hi Arnaldo,

On Wed, Mar 25, 2020 at 10:05 PM Arnaldo Carvalho de Melo
<acme@xxxxxxxxxx> wrote:
>
> Em Wed, Mar 25, 2020 at 09:45:27PM +0900, Namhyung Kim escreveu:
> > Hello,
> >
> > This work is to improve cgroup profiling in perf.  Currently it only
> > supports profiling tasks in a specific cgroup and there's no way to
> > identify which cgroup the current sample belongs to.  So I added
> > PERF_SAMPLE_CGROUP to add cgroup id into each sample.  It's a 64-bit
> > integer having file handle of the cgroup.  And kernel also generates
> > PERF_RECORD_CGROUP event for new groups to correlate the cgroup id and
> > cgroup name (path in the cgroup filesystem).  The cgroup id can be
> > read from userspace by name_to_handle_at() system call so it can
> > synthesize the CGROUP event for existing groups.
>
> Thanks for the refresh, I'll test this today and all going well push to
> Ingo soon,

Thanks for doing this!
Namhyung