diff options
| 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/util/evlist.c | |
| parent | 0b77383134f3dbb461189a9c4f3b46b20152045d (diff) | |
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/util/evlist.c')
| -rw-r--r-- | tools/perf/util/evlist.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c index 6f010b9f0a81..e90575192209 100644 --- a/tools/perf/util/evlist.c +++ b/tools/perf/util/evlist.c @@ -1018,7 +1018,7 @@ int perf_evlist__parse_mmap_pages(const struct option *opt, const char *str, */ int perf_evlist__mmap_ex(struct perf_evlist *evlist, unsigned int pages, unsigned int auxtrace_pages, - bool auxtrace_overwrite) + bool auxtrace_overwrite, int nr_cblocks) { struct perf_evsel *evsel; const struct cpu_map *cpus = evlist->cpus; @@ -1028,7 +1028,7 @@ int perf_evlist__mmap_ex(struct perf_evlist *evlist, unsigned int pages, * Its value is decided by evsel's write_backward. * So &mp should not be passed through const pointer. */ - struct mmap_params mp = { .nr_cblocks = 0 }; + struct mmap_params mp = { .nr_cblocks = nr_cblocks }; if (!evlist->mmap) evlist->mmap = perf_evlist__alloc_mmap(evlist, false); @@ -1060,7 +1060,7 @@ int perf_evlist__mmap_ex(struct perf_evlist *evlist, unsigned int pages, int perf_evlist__mmap(struct perf_evlist *evlist, unsigned int pages) { - return perf_evlist__mmap_ex(evlist, pages, 0, false); + return perf_evlist__mmap_ex(evlist, pages, 0, false, 0); } int perf_evlist__create_maps(struct perf_evlist *evlist, struct target *target) |