From: sashiko-bot@kernel.org
To: "Arnaldo Carvalho de Melo" <acme@kernel.org>
Cc: linux-perf-users@vger.kernel.org
Subject: Re: [PATCH v4 5/6] perf mem record: Request PERF_SAMPLE_CPU by default
Date: Thu, 24 Sep 2026 21:37:34 +0000 [thread overview]
Message-ID: <20260924213735.12FC01F000FF@smtp.kernel.org> (raw)
In-Reply-To: <20260924212809.1733663-6-acme@kernel.org>
> From: Arnaldo Carvalho de Melo <acme@redhat.com>
>
> The data type profiling per-sample stream keys cross-CPU contention on
> sample->cpu, which without PERF_SAMPLE_CPU is the "no CPU info"
> sentinel, making same-instance accesses from different cores
> indistinguishable from same-CPU traffic. 'perf mem record' already
> passes -d and -W to the record parser, add --sample-cpu and document it
> in perf-mem(1).
>
> Also grow rec_argv: the new entry overflows it on PMUs with separate
> load and store events, as the space for the fixed arguments was not
> reserved.
>
> Assisted-by: LLM
> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Sashiko has reviewed this patch and found no issues. It looks great!
--
Sashiko AI review · https://sashiko.dev/#/patchset/20260924212809.1733663-1-acme@kernel.org?part=5
next prev parent reply other threads:[~2026-09-24 21:37 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-24 21:28 [PATCH v4 0/6] perf annotate-data: Fix hangs on broken debug info, AMD mem record Arnaldo Carvalho de Melo
2026-09-24 21:28 ` [PATCH v4 1/6] perf dwarf-aux: Bound the type chases for broken debug info Arnaldo Carvalho de Melo
2026-09-24 21:35 ` sashiko-bot
2026-09-24 21:28 ` [PATCH v4 2/6] perf dwarf-aux: Add die_same_file() and die_get_type_die() Arnaldo Carvalho de Melo
2026-09-24 21:34 ` sashiko-bot
2026-09-24 21:28 ` [PATCH v4 3/6] perf annotate-data: Resolve type DIEs in the debug file they came from Arnaldo Carvalho de Melo
2026-09-24 21:34 ` sashiko-bot
2026-09-24 21:28 ` [PATCH v4 4/6] perf annotate-data: Bound the member nesting recursion Arnaldo Carvalho de Melo
2026-09-24 21:35 ` sashiko-bot
2026-09-24 21:28 ` [PATCH v4 5/6] perf mem record: Request PERF_SAMPLE_CPU by default Arnaldo Carvalho de Melo
2026-09-24 21:37 ` sashiko-bot [this message]
2026-09-24 21:28 ` [PATCH v4 6/6] perf mem record: Use the IBS swfilt filter when available Arnaldo Carvalho de Melo
2026-09-24 21:35 ` sashiko-bot
2026-09-25 4:02 ` Ravi Bangoria
2026-09-25 10:31 ` Arnaldo Carvalho de Melo
2026-09-25 11:21 ` Ravi Bangoria
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