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| author |   Alexey Budankov <alexey.budankov@linux.intel.com> | 2018-11-06 12:04:58 +0300 |
|---|---|---|
| committer |   Arnaldo Carvalho de Melo <acme@redhat.com> | 2018-12-17 14:55:08 -0300 |
| commit | d3d1af6f011a553a00d2bda90b2700c0d56bd8f7 (patch) | |
| tree | 8f3deb8dcd8b095b3e876fee7d5825c851b10c1c /tools/perf/perf.h | |
| parent | perf mmap: Map data buffer for preserving collected data (diff) | |
| download | linux-dev-d3d1af6f011a553a00d2bda90b2700c0d56bd8f7.tar.xz linux-dev-d3d1af6f011a553a00d2bda90b2700c0d56bd8f7.zip | |
perf record: Enable asynchronous trace writing
The trace file offset is read once before mmaps iterating loop and
written back after all performance data is enqueued for aio writing.
The trace file offset is incremented linearly after every successful aio
write operation.
record__aio_sync() blocks till completion of the started AIO operation
and then proceeds.
record__aio_mmap_read_sync() implements a barrier for all incomplete
aio write requests.
Signed-off-by: Alexey Budankov <alexey.budankov@linux.intel.com>
Reviewed-by: Jiri Olsa <jolsa@redhat.com>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/ce2d45e9-d236-871c-7c8f-1bed2d37e8ac@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/perf.h')
| -rw-r--r-- | tools/perf/perf.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/tools/perf/perf.h b/tools/perf/perf.h index 0ed4a34c74c4..4d40baa45a5f 100644 --- a/tools/perf/perf.h +++ b/tools/perf/perf.h @@ -83,6 +83,7 @@ struct record_opts { clockid_t clockid; u64 clockid_res_ns; unsigned int proc_map_timeout; + int nr_cblocks; }; struct option; |