linux-kernel - [PATCH v2 05/15] perf session: introduce decompressor into trace reader object

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Message-ID: <b3c73389-7b4c-89cd-423c-68b00fcc61c9@linux.intel.com>
Date:   Wed, 21 Oct 2020 19:00:30 +0300
From:   Alexey Budankov <alexey.budankov@...ux.intel.com>
To:     Arnaldo Carvalho de Melo <acme@...nel.org>,
        Jiri Olsa <jolsa@...hat.com>
Cc:     Namhyung Kim <namhyung@...nel.org>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Adrian Hunter <adrian.hunter@...el.com>,
        Andi Kleen <ak@...ux.intel.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        linux-kernel <linux-kernel@...r.kernel.org>
Subject: [PATCH v2 05/15] perf session: introduce decompressor into trace
 reader object


Introduce decompressor to trace reader object so that decompression
could be executed on per trace file basis separately for every
trace file located in trace directory.

Signed-off-by: Alexey Budankov <alexey.budankov@...ux.intel.com>
---
 tools/perf/util/session.c | 4 +++-
 tools/perf/util/session.h | 1 +
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c
index 911b2dbcd0ac..6afc670fdf0c 100644
--- a/tools/perf/util/session.c
+++ b/tools/perf/util/session.c
@@ -44,6 +44,8 @@ static int perf_session__process_compressed_event(struct perf_session *session,
 	u64 decomp_last_rem = 0;
 	size_t mmap_len, decomp_len = session->header.env.comp_mmap_len;
 	struct decomp *decomp, *decomp_last = session->decomp_last;
+	struct zstd_data *zstd_data = session->reader ?
+		&(session->reader->zstd_data) : &(session->zstd_data);
 
 	if (decomp_last) {
 		decomp_last_rem = decomp_last->size - decomp_last->head;
@@ -71,7 +73,7 @@ static int perf_session__process_compressed_event(struct perf_session *session,
 	src = (void *)event + sizeof(struct perf_record_compressed);
 	src_size = event->pack.header.size - sizeof(struct perf_record_compressed);
 
-	decomp_size = zstd_decompress_stream(&(session->zstd_data), src, src_size,
+	decomp_size = zstd_decompress_stream(zstd_data, src, src_size,
 				&(decomp->data[decomp_last_rem]), decomp_len - decomp_last_rem);
 	if (!decomp_size) {
 		munmap(decomp, mmap_len);
diff --git a/tools/perf/util/session.h b/tools/perf/util/session.h
index abdb8518a81f..4fc9ccdf7970 100644
--- a/tools/perf/util/session.h
+++ b/tools/perf/util/session.h
@@ -42,6 +42,7 @@ struct reader {
 	u64		 data_size;
 	u64		 data_offset;
 	reader_cb_t	 process;
+	struct zstd_data zstd_data;
 };
 
 struct perf_session {
-- 
2.24.1