linux-kernel - [PATCH 0/4] perf bpf_counter: A set of random fixes (v1)

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Date:   Tue,  3 Jan 2023 22:43:58 -0800
From:   Namhyung Kim <namhyung@...nel.org>
To:     Arnaldo Carvalho de Melo <acme@...nel.org>,
        Jiri Olsa <jolsa@...nel.org>
Cc:     Ingo Molnar <mingo@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Ian Rogers <irogers@...gle.com>,
        Adrian Hunter <adrian.hunter@...el.com>,
        linux-perf-users@...r.kernel.org, Song Liu <songliubraving@...com>,
        bpf@...r.kernel.org
Subject: [PATCH 0/4] perf bpf_counter: A set of random fixes (v1)

Hello,

This is a collection of small fixes for perf stat bpf counters (bperf).

The bperf framework maintains perf_attr_map in the BPF fs to share the
same event as much as possible.  But the size was limited to 16 and
perf stat with -ddd option would create more than 16 events and fails.

Also cgroup events with --for-each-cgroup had some other problems when
dealing with unsupported events and duplicate cgroups.

The code is available at 'perf/stat-bpf-fix-v1' branch in

  git://git.kernel.org/pub/scm/linux/kernel/git/namhyung/linux-perf.git

Thanks,
Namhyung

Namhyung Kim (4):
  perf bpf_counter: Add more error messages for bperf
  perf bpf_counter: Increase perf_attr_map entries to 32
  perf bpf_counter: Handle unsupported cgroup events
  perf stat: Do not use the same cgroup more than once

 tools/perf/util/bpf_counter.c        | 11 ++++++++---
 tools/perf/util/bpf_counter_cgroup.c | 14 +++-----------
 tools/perf/util/cgroup.c             | 23 ++++++++++++++++++-----
 3 files changed, 29 insertions(+), 19 deletions(-)


base-commit: d8d85ce86dc82de4f88b821a78f533b9d5b22a45
-- 
2.39.0.314.g84b9a713c41-goog