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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 20:55:08 +0300
commitd3d1af6f011a553a00d2bda90b2700c0d56bd8f7 (patch)
tree8f3deb8dcd8b095b3e876fee7d5825c851b10c1c /tools/perf/perf.h
parent0b77383134f3dbb461189a9c4f3b46b20152045d (diff)
downloadlinux-d3d1af6f011a553a00d2bda90b2700c0d56bd8f7.tar.xz
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.h1
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;