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Date: Wed, 13 Oct 2021 12:06:36 +0300
From: Alexey Bayduraev <alexey.v.bayduraev@...ux.intel.com>
To: Arnaldo Carvalho de Melo <acme@...nel.org>
Cc: Jiri Olsa <jolsa@...hat.com>, Namhyung Kim <namhyung@...nel.org>,
Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
Peter Zijlstra <peterz@...radead.org>,
Ingo Molnar <mingo@...hat.com>,
linux-kernel <linux-kernel@...r.kernel.org>,
Andi Kleen <ak@...ux.intel.com>,
Adrian Hunter <adrian.hunter@...el.com>,
Alexander Antonov <alexander.antonov@...ux.intel.com>,
Alexei Budankov <abudankov@...wei.com>,
Riccardo Mancini <rickyman7@...il.com>
Subject: [PATCH v4 2/8] perf session: Introduce decompressor in reader object
Introducing decompressor data structure with pointers to decomp
objects and to zstd object. We cannot just move session->zstd_data to
decomp_data as session->zstd_data is used not only for decompression.
Adding decompressor data object to reader object and introducing
active_decomp into perf_session object to select current decompressor.
Thus decompression could be executed separately for each data file.
Acked-by: Namhyung Kim <namhyung@...il.com>
Reviewed-by: Riccardo Mancini <rickyman7@...il.com>
Tested-by: Riccardo Mancini <rickyman7@...il.com>
Signed-off-by: Alexey Bayduraev <alexey.v.bayduraev@...ux.intel.com>
---
tools/perf/util/session.c | 39 +++++++++++++++++++++++++--------------
tools/perf/util/session.h | 10 ++++++++--
2 files changed, 33 insertions(+), 16 deletions(-)
diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c
index bf73e8c1f15c..ff09869ab075 100644
--- a/tools/perf/util/session.c
+++ b/tools/perf/util/session.c
@@ -44,7 +44,7 @@ static int perf_session__process_compressed_event(struct perf_session *session,
size_t decomp_size, src_size;
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 decomp *decomp, *decomp_last = session->active_decomp->decomp_last;
if (decomp_last) {
decomp_last_rem = decomp_last->size - decomp_last->head;
@@ -71,7 +71,7 @@ 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(session->active_decomp->zstd_decomp, src, src_size,
&(decomp->data[decomp_last_rem]), decomp_len - decomp_last_rem);
if (!decomp_size) {
munmap(decomp, mmap_len);
@@ -81,13 +81,12 @@ static int perf_session__process_compressed_event(struct perf_session *session,
decomp->size += decomp_size;
- if (session->decomp == NULL) {
- session->decomp = decomp;
- session->decomp_last = decomp;
- } else {
- session->decomp_last->next = decomp;
- session->decomp_last = decomp;
- }
+ if (session->active_decomp->decomp == NULL)
+ session->active_decomp->decomp = decomp;
+ else
+ session->active_decomp->decomp_last->next = decomp;
+
+ session->active_decomp->decomp_last = decomp;
pr_debug("decomp (B): %zd to %zd\n", src_size, decomp_size);
@@ -197,6 +196,8 @@ struct perf_session *__perf_session__new(struct perf_data *data,
session->repipe = repipe;
session->tool = tool;
+ session->decomp_data.zstd_decomp = &session->zstd_data;
+ session->active_decomp = &session->decomp_data;
INIT_LIST_HEAD(&session->auxtrace_index);
machines__init(&session->machines);
ordered_events__init(&session->ordered_events,
@@ -276,11 +277,11 @@ static void perf_session__delete_threads(struct perf_session *session)
machine__delete_threads(&session->machines.host);
}
-static void perf_session__release_decomp_events(struct perf_session *session)
+static void perf_decomp__release_events(struct decomp *next)
{
- struct decomp *next, *decomp;
+ struct decomp *decomp;
size_t mmap_len;
- next = session->decomp;
+
do {
decomp = next;
if (decomp == NULL)
@@ -299,7 +300,7 @@ void perf_session__delete(struct perf_session *session)
auxtrace_index__free(&session->auxtrace_index);
perf_session__destroy_kernel_maps(session);
perf_session__delete_threads(session);
- perf_session__release_decomp_events(session);
+ perf_decomp__release_events(session->decomp_data.decomp);
perf_env__exit(&session->header.env);
machines__exit(&session->machines);
if (session->data) {
@@ -2117,7 +2118,7 @@ static int __perf_session__process_decomp_events(struct perf_session *session)
{
s64 skip;
u64 size, file_pos = 0;
- struct decomp *decomp = session->decomp_last;
+ struct decomp *decomp = session->active_decomp->decomp_last;
if (!decomp)
return 0;
@@ -2178,6 +2179,8 @@ struct reader {
u64 file_pos;
u64 file_offset;
u64 head;
+ struct zstd_data zstd_data;
+ struct decomp_data decomp_data;
};
static int
@@ -2207,6 +2210,11 @@ reader__process_events(struct reader *rd, struct perf_session *session,
memset(mmaps, 0, sizeof(rd->mmaps));
+ if (zstd_init(&rd->zstd_data, 0))
+ return -1;
+ rd->decomp_data.zstd_decomp = &rd->zstd_data;
+ session->active_decomp = &rd->decomp_data;
+
mmap_prot = PROT_READ;
mmap_flags = MAP_SHARED;
@@ -2282,6 +2290,7 @@ reader__process_events(struct reader *rd, struct perf_session *session,
goto more;
out:
+ session->active_decomp = &session->decomp_data;
return err;
}
@@ -2334,6 +2343,8 @@ static int __perf_session__process_events(struct perf_session *session)
*/
ordered_events__reinit(&session->ordered_events);
auxtrace__free_events(session);
+ perf_decomp__release_events(rd.decomp_data.decomp);
+ zstd_fini(&rd.zstd_data);
session->one_mmap = false;
return err;
}
diff --git a/tools/perf/util/session.h b/tools/perf/util/session.h
index 5d8bd14a0a39..46c854292ad6 100644
--- a/tools/perf/util/session.h
+++ b/tools/perf/util/session.h
@@ -20,6 +20,12 @@ struct thread;
struct auxtrace;
struct itrace_synth_opts;
+struct decomp_data {
+ struct decomp *decomp;
+ struct decomp *decomp_last;
+ struct zstd_data *zstd_decomp;
+};
+
struct perf_session {
struct perf_header header;
struct machines machines;
@@ -39,8 +45,8 @@ struct perf_session {
u64 bytes_transferred;
u64 bytes_compressed;
struct zstd_data zstd_data;
- struct decomp *decomp;
- struct decomp *decomp_last;
+ struct decomp_data decomp_data;
+ struct decomp_data *active_decomp;
};
struct decomp {
--
2.19.0
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