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| author | Alexey Budankov <[email protected]> | 2018-11-06 09:04:58 +0000 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <[email protected]> | 2018-12-17 17:55:08 +0000 |
| commit | d3d1af6f011a553a00d2bda90b2700c0d56bd8f7 (patch) | |
| tree | 8f3deb8dcd8b095b3e876fee7d5825c851b10c1c /tools/perf/util/scripting-engines/trace-event-perl.c | |
| parent | perf mmap: Map data buffer for preserving collected data (diff) | |
| download | kernel-d3d1af6f011a553a00d2bda90b2700c0d56bd8f7.tar.gz kernel-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 <[email protected]>
Reviewed-by: Jiri Olsa <[email protected]>
Acked-by: Namhyung Kim <[email protected]>
Cc: Alexander Shishkin <[email protected]>
Cc: Andi Kleen <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
Diffstat (limited to 'tools/perf/util/scripting-engines/trace-event-perl.c')
0 files changed, 0 insertions, 0 deletions