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    SubjectRe: [PATCH v9 00/12] perf: enable compression of record mode trace to save storage space
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    On 18.03.2019 14:46, Jiri Olsa wrote:
    > On Sat, Mar 16, 2019 at 11:58:30AM +0300, Alexey Budankov wrote:
    >
    > SNIP
    >
    >> ---
    >> Alexey Budankov (12):
    >> feature: implement libzstd check, LIBZSTD_DIR and NO_LIBZSTD defines
    >> perf record: implement --mmap-flush=<number> option
    >> perf session: define bytes_transferred and bytes_compressed metrics
    >> perf record: implement COMPRESSED event record and its attributes
    >> perf mmap: implement dedicated memory buffer for data compression
    >> perf util: introduce Zstd streaming based compression API
    >> perf record: implement compression for serial trace streaming
    >> perf record: implement compression for AIO trace streaming
    >> perf record: implement -z,--compression_level[=<n>] option
    >> perf report: implement record trace decompression
    >> perf inject: enable COMPRESSED records decompression
    >> perf tests: implement Zstd comp/decomp integration test
    >>
    >> tools/build/Makefile.feature | 6 +-
    >> tools/build/feature/Makefile | 6 +-
    >> tools/build/feature/test-all.c | 5 +
    >> tools/build/feature/test-libzstd.c | 12 +
    >> tools/perf/Documentation/perf-record.txt | 17 ++
    >> .../Documentation/perf.data-file-format.txt | 24 ++
    >> tools/perf/Makefile.config | 20 ++
    >> tools/perf/Makefile.perf | 3 +
    >> tools/perf/builtin-inject.c | 4 +
    >> tools/perf/builtin-record.c | 285 +++++++++++++++---
    >> tools/perf/builtin-report.c | 5 +-
    >> tools/perf/builtin-version.c | 2 +
    >> tools/perf/perf.h | 2 +
    >> .../tests/shell/record+zstd_comp_decomp.sh | 28 ++
    >> tools/perf/util/Build | 2 +
    >> tools/perf/util/compress.h | 54 ++++
    >> tools/perf/util/env.h | 11 +
    >> tools/perf/util/event.c | 1 +
    >> tools/perf/util/event.h | 7 +
    >> tools/perf/util/evlist.c | 8 +-
    >> tools/perf/util/evlist.h | 3 +-
    >> tools/perf/util/header.c | 55 +++-
    >> tools/perf/util/header.h | 1 +
    >> tools/perf/util/mmap.c | 106 ++-----
    >> tools/perf/util/mmap.h | 17 +-
    >> tools/perf/util/session.c | 124 +++++++-
    >> tools/perf/util/session.h | 14 +
    >> tools/perf/util/tool.h | 2 +
    >> tools/perf/util/zstd.c | 111 +++++++
    >> 29 files changed, 801 insertions(+), 134 deletions(-)
    >> create mode 100644 tools/build/feature/test-libzstd.c
    >> create mode 100755 tools/perf/tests/shell/record+zstd_comp_decomp.sh
    >> create mode 100644 tools/perf/util/zstd.c
    >>
    >> ---
    >> Changes in v9:
    >> - fixed issue with improper max COMPRESSED record size calculation
    >> - moved up calculation of ratio variable in 03/12
    >> - made minor corrections in changelogs
    >> - corrected several checkpatch.pl warnings and errors
    >
    > apart from 2 comments I'm ok with this patchset

    Comments are addressed in v10.

    >
    > Reviewed-by: Jiri Olsa <jolsa@kernel.org>

    Thanks,
    Alexey

    >
    > thanks a lot,
    > jirka
    >

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