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authorAlexey Budankov <alexey.budankov@linux.intel.com>2018-11-06 12:04:58 +0300
committerArnaldo Carvalho de Melo <acme@redhat.com>2018-12-17 14:55:08 -0300
commitd3d1af6f011a553a00d2bda90b2700c0d56bd8f7 (patch)
tree8f3deb8dcd8b095b3e876fee7d5825c851b10c1c /drivers
parent0b77383134f3dbb461189a9c4f3b46b20152045d (diff)
downloadlinux-d3d1af6f011a553a00d2bda90b2700c0d56bd8f7.tar.bz2
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 'drivers')
0 files changed, 0 insertions, 0 deletions