From: sashiko-bot@kernel.org
To: "Ian Rogers" <irogers@google.com>
Cc: linux-perf-users@vger.kernel.org
Subject: Re: [PATCH 06/10] perf jevents: Add --compress=lzma block compression backend
Date: Fri, 13 Nov 2026 21:13:05 +0000 [thread overview]
Message-ID: <sashiko-outbox-213695@kernel.org> (raw)
In-Reply-To: <20261113210822.3112700-7-irogers@google.com>
> Add an 'lzma' block-indexed string compression backend to jevents.py
> using Python's standard-library lzma module (imported lazily) to
> compress each ~8 KiB string block independently as a raw LZMA2 stream
> (FORMAT_RAW + FILTER_LZMA2, dict_size=64 KiB) decoded on demand via
> liblzma's lzma_raw_buffer_decode() in pmu-events-string.c.
>
> This provides random-access per-block string decompression indexed by
> (block_id << 16) | sub_offset on builds where liblzma is enabled without
> libzstd or zlib. On x86, --compress=lzma shrinks pmu-events-string.o
> from ~6.90 MB to ~819 KB.
>
> Signed-off-by: Ian Rogers <irogers@google.com>
Sashiko has reviewed this patch and found no issues.
--
Sashiko AI review · https://sashiko.dev/#/patchset/20261113210822.3112700-1-irogers@google.com?part=6
next prev parent reply other threads:[~2026-11-13 21:13 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-11-13 21:08 [PATCH 00/10] perf jevents: Block-indexed string compression and default JEVENTS_ARCH=all Ian Rogers
2026-11-13 21:08 ` [PATCH 01/10] perf jevents: Store raw bytes in BigCString instead of C-escaped strings Ian Rogers
2026-11-13 21:21 ` sashiko-bot
2026-11-13 21:08 ` [PATCH 02/10] perf jevents: Sort BigCString entries alphabetically Ian Rogers
2026-11-13 21:12 ` sashiko-bot
2026-11-13 21:08 ` [PATCH 03/10] perf jevents: Store PMU names as string literals in struct pmu_table_entry Ian Rogers
2026-11-13 21:13 ` sashiko-bot
2026-11-13 21:08 ` [PATCH 04/10] perf jevents: Encapsulate big_c_string lookups behind pmu_events__get_string() Ian Rogers
2026-11-13 21:12 ` sashiko-bot
2026-11-13 21:08 ` [PATCH 05/10] perf jevents: Add block-indexed string packing and --compress=zlib Ian Rogers
2026-11-13 21:16 ` sashiko-bot
2026-11-13 21:08 ` [PATCH 06/10] perf jevents: Add --compress=lzma block compression backend Ian Rogers
2026-11-13 21:13 ` sashiko-bot [this message]
2026-11-13 21:08 ` [PATCH 07/10] perf jevents: Add --compress=zstd " Ian Rogers
2026-11-13 21:13 ` sashiko-bot
2026-11-13 21:08 ` [PATCH 08/10] perf build: Enable jevents string compression when available Ian Rogers
2026-11-13 21:17 ` sashiko-bot
2026-11-13 21:08 ` [PATCH 09/10] perf tests pmu-events: Test metricgroup descriptions and concurrent lookups Ian Rogers
2026-11-13 21:20 ` sashiko-bot
2026-11-13 21:08 ` [PATCH 10/10] perf build: Default JEVENTS_ARCH to all Ian Rogers
2026-11-13 21:21 ` sashiko-bot
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