| From | Namhyung Kim <> | Date | Wed, 25 Mar 2020 22:19:57 +0900 | Subject | Re: [PATCHSET 0/9] perf: Improve cgroup profiling (v6) |
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Hi Arnaldo,
On Wed, Mar 25, 2020 at 10:05 PM Arnaldo Carvalho de Melo <acme@kernel.org> 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
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