diff options
| author | Alexey Budankov <alexey.budankov@linux.intel.com> | 2019-03-18 20:44:12 +0300 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2019-05-15 22:36:49 +0300 |
| commit | ef781128e47e73f0e5b2ad385cfa685a0719456a (patch) | |
| tree | 7701f3c1173c36e07a3404fd28256a8c4ee94ee3 /tools/perf/util/mmap.h | |
| parent | 5d7f41164930ecc1797702b7f9728ac702609ef3 (diff) | |
| download | linux-ef781128e47e73f0e5b2ad385cfa685a0719456a.tar.xz | |
perf record: Implement compression for AIO trace streaming
Compression is implemented using the functions from zstd.c. As the memory
to operate on the compression uses mmap->aio.data[] buffers. If Zstd
streaming compression API fails for some reason the data to be compressed
are just copied into the memory buffers using plain memcpy().
Compressed trace frame consists of an array of PERF_RECORD_COMPRESSED
records. Each element of the array is not longer that PERF_SAMPLE_MAX_SIZE
and consists of perf_event_header followed by the compressed chunk
that is decompressed on the loading stage.
perf_mmap__aio_push() is replaced by perf_mmap__push() which is now used
in the both serial and AIO streaming cases. perf_mmap__push() is extended
with positive return values to signify absence of data ready for
processing.
Signed-off-by: Alexey Budankov <alexey.budankov@linux.intel.com>
Reviewed-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/77db2b2c-5d03-dbb0-aeac-c4dd92129ab9@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/mmap.h')
| -rw-r--r-- | tools/perf/util/mmap.h | 12 |
1 files changed, 0 insertions, 12 deletions
diff --git a/tools/perf/util/mmap.h b/tools/perf/util/mmap.h index 4e2f58d95c1f..274ce389cd84 100644 --- a/tools/perf/util/mmap.h +++ b/tools/perf/util/mmap.h @@ -101,18 +101,6 @@ union perf_event *perf_mmap__read_event(struct perf_mmap *map); int perf_mmap__push(struct perf_mmap *md, void *to, int push(struct perf_mmap *map, void *to, void *buf, size_t size)); -#ifdef HAVE_AIO_SUPPORT -int perf_mmap__aio_push(struct perf_mmap *md, void *to, int idx, - int push(void *to, struct aiocb *cblock, void *buf, size_t size, off_t off), - off_t *off); -#else -static inline int perf_mmap__aio_push(struct perf_mmap *md __maybe_unused, void *to __maybe_unused, int idx __maybe_unused, - int push(void *to, struct aiocb *cblock, void *buf, size_t size, off_t off) __maybe_unused, - off_t *off __maybe_unused) -{ - return 0; -} -#endif size_t perf_mmap__mmap_len(struct perf_mmap *map); |