From: sashiko-bot@kernel.org
To: "Lalit Maganti" <lalitmaganti@gmail.com>
Cc: linux-perf-users@vger.kernel.org
Subject: Re: [PATCH 4/4] perf python: Compress the traces of the perfetto script
Date: Sun, 15 Nov 2026 00:45:14 +0000 [thread overview]
Message-ID: <sashiko-outbox-215156@kernel.org> (raw)
In-Reply-To: <20261115003916.1873857-5-lalitmaganti@gmail.com>
> Perfetto reads zstd and gzip traces directly, so compress the output by
> default. Add a -c/--compression option:
> - auto (default): zstd if Python has compression.zstd (3.14+), else
> gzip, so only the standard library is needed
> - zstd: level 9
> - gzip: level 6, with no time or file name in the header so the output
> is reproducible
> - none
>
> Without -o, the output file gets a matching extension: perf.pftrace.zst,
> perf.pftrace.gz or perf.pftrace.
>
> For 4496 samples of a two-thread workload, the trace is 127KB
> uncompressed, 37KB with gzip and 30KB with zstd. Compressing takes a few
> milliseconds.
>
> The shell test now checks every compression the Python running it
> supports.
>
> Assisted-by: LLM
> Signed-off-by: Lalit Maganti <lalitmaganti@gmail.com>
Sashiko has reviewed this patch and found no issues.
--
Sashiko AI review · https://sashiko.dev/#/patchset/20261115003916.1873857-1-lalitmaganti@gmail.com?part=4
prev parent reply other threads:[~2026-11-15 0:45 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-11-15 0:39 [PATCH 0/4] perf python: Add a script to open profiles in the Perfetto UI Lalit Maganti
2026-11-15 0:39 ` [PATCH 1/4] perf python: Add kernel attribute to callchain_node Lalit Maganti
2026-11-15 0:45 ` sashiko-bot
2026-11-15 0:39 ` [PATCH 2/4] perf python: Add clockid attribute to session Lalit Maganti
2026-11-15 0:44 ` sashiko-bot
2026-11-15 0:39 ` [PATCH 3/4] perf python: Add perfetto script to open profiles in the Perfetto UI Lalit Maganti
2026-11-15 0:53 ` sashiko-bot
2026-11-15 0:39 ` [PATCH 4/4] perf python: Compress the traces of the perfetto script Lalit Maganti
2026-11-15 0:45 ` sashiko-bot [this message]
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