From: Jiri Olsa <jolsa@redhat.com>
To: Alexey Budankov <alexey.budankov@linux.intel.com>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>,
Namhyung Kim <namhyung@kernel.org>,
Alexander Shishkin <alexander.shishkin@linux.intel.com>,
Ingo Molnar <mingo@redhat.com>,
Peter Zijlstra <peterz@infradead.org>,
Andi Kleen <ak@linux.intel.com>,
linux-kernel <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH v7 08/12] perf record: implement compression for AIO trace streaming
Date: Wed, 13 Mar 2019 15:37:14 +0100 [thread overview]
Message-ID: <20190313143714.GE6676@krava> (raw)
In-Reply-To: <618f7b8b-015b-d67e-9ef4-dc7aa0d2cd62@linux.intel.com>
On Tue, Mar 12, 2019 at 08:30:13AM +0300, Alexey Budankov wrote:
>
> 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>
> ---
> tools/perf/builtin-record.c | 110 ++++++++++++++++++++++++++++--------
> tools/perf/util/mmap.c | 76 +------------------------
> tools/perf/util/mmap.h | 12 ----
> 3 files changed, 87 insertions(+), 111 deletions(-)
nice stats for adding new feature ;-)
jirka
next prev parent reply other threads:[~2019-03-13 14:37 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-03-12 4:57 [PATCH v7 00/12] perf: enable compression of record mode trace to save storage space Alexey Budankov
2019-03-12 5:03 ` [PATCH v7 01/12] feature: implement libzstd check, LIBZSTD_DIR and NO_LIBZSTD defines Alexey Budankov
2019-03-12 5:12 ` [PATCH v7 02/12] perf record: implement -f,--mmap-flush=<threshold> option Alexey Budankov
2019-03-13 14:36 ` Jiri Olsa
2019-03-13 15:00 ` Alexey Budankov
2019-03-12 5:15 ` [PATCH v7 03/12] perf session: define bytes_transferred and bytes_compressed metrics Alexey Budankov
2019-03-12 5:17 ` [PATCH v7 04/12] perf record: implement COMPRESSED event record and its attributes Alexey Budankov
2019-03-12 5:20 ` [PATCH v7 05/12] perf mmap: implement dedicated memory buffer for data compression Alexey Budankov
2019-03-12 5:23 ` [PATCH v7 06/12] perf util: introduce Zstd based streaming compression API Alexey Budankov
2019-03-13 14:37 ` Jiri Olsa
2019-03-13 15:06 ` Alexey Budankov
2019-03-12 5:25 ` [PATCH v7 07/12] perf record: implement compression for serial trace streaming Alexey Budankov
2019-03-12 5:30 ` [PATCH v7 08/12] perf record: implement compression for AIO " Alexey Budankov
2019-03-13 14:36 ` Jiri Olsa
2019-03-13 15:33 ` Alexey Budankov
2019-03-13 14:37 ` Jiri Olsa [this message]
2019-03-12 5:32 ` [PATCH v7 09/12] perf record: implement -z,--compression_level=n option Alexey Budankov
2019-03-12 5:36 ` [PATCH v7 10/12] perf report: implement record trace decompression Alexey Budankov
2019-03-13 14:37 ` Jiri Olsa
2019-03-13 15:55 ` Alexey Budankov
2019-03-14 9:01 ` Jiri Olsa
2019-03-12 5:37 ` [PATCH v7 11/12] perf inject: enable COMPRESSED records decompression Alexey Budankov
2019-03-12 5:38 ` [PATCH v7 12/12] perf tests: implement Zstd comp/decomp integration test Alexey Budankov
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