linux-kernel - Re: [PATCH -next 0/2] perf stat: Support inherit events for bperf

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Message-ID: <ZthcJtXyWk7uJFZY@x1>
Date: Wed, 4 Sep 2024 10:09:58 -0300
From: Arnaldo Carvalho de Melo <acme@...nel.org>
To: Song Liu <song@...nel.org>, Tengda Wu <wutengda@...weicloud.com>
Cc: Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...hat.com>,
	Namhyung Kim <namhyung@...nel.org>,
	Mark Rutland <mark.rutland@....com>,
	Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
	Jiri Olsa <jolsa@...nel.org>, Ian Rogers <irogers@...gle.com>,
	Adrian Hunter <adrian.hunter@...el.com>, kan.liang@...ux.intel.com,
	linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org,
	bpf@...r.kernel.org
Subject: Re: [PATCH -next 0/2] perf stat: Support inherit events for bperf

On Wed, Sep 04, 2024 at 12:31:01PM +0000, Tengda Wu wrote:
> Hi,
> 
> bperf (perf-stat --bpf-counter) has not supported inherit events
> during fork() since it was first introduced.
> 
> This patch series tries to add this support by:
>  1) adding two new bpf programs to monitor task lifecycle;
>  2) recording new tasks in the filter map dynamically;
>  3) reusing `accum_key` of parent task for new tasks.

Song, can you please take a look?

Thanks in advance!

- Arnaldo
 
> Thanks,
> Tengda
> 
> Tengda Wu (2):
>   perf stat: Support inherit events during fork() for bperf
>   perf test: Use sqrtloop workload to test bperf event
> 
>  tools/perf/tests/shell/stat_bpf_counters.sh   |  2 +-
>  tools/perf/util/bpf_counter.c                 |  9 +--
>  tools/perf/util/bpf_skel/bperf_follower.bpf.c | 75 +++++++++++++++++--
>  tools/perf/util/bpf_skel/bperf_u.h            |  5 ++
>  4 files changed, 79 insertions(+), 12 deletions(-)
> 
> -- 
> 2.34.1