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    Subject[PATCH v5 03/10] perf session: define bytes_transferred and bytes_compressed metrics
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    Define bytes_transferred and bytes_compressed metrics to calculate
    comp_ratio=transferred/compressed in the end of the data collection.

    bytes_transferred accumulates the amount of bytes that was extracted from
    the mmaped kernel buffers for compression. bytes_compressed accumulates
    the amount of bytes that was received after applying compression to
    move to a storage.

    Signed-off-by: Alexey Budankov <alexey.budankov@linux.intel.com>
    ---
    tools/perf/builtin-record.c | 8 ++++++++
    tools/perf/util/env.h | 1 +
    tools/perf/util/session.h | 2 ++
    3 files changed, 11 insertions(+)

    diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
    index 9b02a68e8c23..ab121bc27c6d 100644
    --- a/tools/perf/builtin-record.c
    +++ b/tools/perf/builtin-record.c
    @@ -1449,6 +1449,14 @@ static int __cmd_record(struct record *rec, int argc, const char **argv)
    record__mmap_read_all(rec, true);
    record__aio_mmap_read_sync(rec);

    + if (!quiet && rec->session->bytes_transferred && rec->session->bytes_compressed) {
    + float ratio = (float)rec->session->bytes_transferred/(float)rec->session->bytes_compressed;
    +
    + session->header.env.comp_ratio = ratio + 0.5;
    + fprintf(stderr, "[ perf record: Compressed %.3f MB to %.3f MB, ratio is %.3f ]\n",
    + rec->session->bytes_transferred / 1024.0 / 1024.0, rec->session->bytes_compressed / 1024.0 / 1024.0, ratio);
    + }
    +
    if (forks) {
    int exit_status;

    diff --git a/tools/perf/util/env.h b/tools/perf/util/env.h
    index d01b8355f4ca..fb39e9af128f 100644
    --- a/tools/perf/util/env.h
    +++ b/tools/perf/util/env.h
    @@ -64,6 +64,7 @@ struct perf_env {
    struct memory_node *memory_nodes;
    unsigned long long memory_bsize;
    u64 clockid_res_ns;
    + u32 comp_ratio;
    };

    extern struct perf_env perf_env;
    diff --git a/tools/perf/util/session.h b/tools/perf/util/session.h
    index d96eccd7d27f..0e14884f28b2 100644
    --- a/tools/perf/util/session.h
    +++ b/tools/perf/util/session.h
    @@ -35,6 +35,8 @@ struct perf_session {
    struct ordered_events ordered_events;
    struct perf_data *data;
    struct perf_tool *tool;
    + u64 bytes_transferred;
    + u64 bytes_compressed;
    };

    struct perf_tool;
    --
    2.20.1
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