diff options
| author | Jiri Olsa <jolsa@kernel.org> | 2018-11-05 13:24:55 +0100 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2018-12-17 14:57:52 -0300 |
| commit | 16c66bc167cc52992f66748aed7ac21396189457 (patch) | |
| tree | 3df75ce71a4087525888d764a68fb81bdc61360b /tools/perf/util/ordered-events.c | |
| parent | 254de74cd14a2e64323caeffe653de0f390a4e65 (diff) | |
perf top: Add processing thread
Add a new thread that takes care of the hist creating to alleviate the
main reader thread so it can keep perf mmaps served in time so that we
reduce the possibility of losing events.
The 'perf top' command now spawns 2 extra threads, the data processing
is the following:
1) The main thread reads the data from mmaps and queues them to
ordered events object;
2) The processing threads takes the data from the ordered events
object and create initial histogram;
3) The GUI thread periodically sorts the initial histogram and
presents it.
Passing the data between threads 1 and 2 is done by having 2 ordered
events queues. One is always being stored by thread 1 while the other is
flushed out in thread 2.
Passing the data between threads 2 and 3 stays the same as was initially
for threads 1 and 3.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Acked-by: David S. Miller <davem@davemloft.net>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/n/tip-hhf4hllgkmle9wl1aly1jli0@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/ordered-events.c')
| -rw-r--r-- | tools/perf/util/ordered-events.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/tools/perf/util/ordered-events.c b/tools/perf/util/ordered-events.c index d053aa0a7582..c5412db05683 100644 --- a/tools/perf/util/ordered-events.c +++ b/tools/perf/util/ordered-events.c @@ -279,8 +279,10 @@ int ordered_events__flush(struct ordered_events *oe, enum oe_flush how) switch (how) { case OE_FLUSH__FINAL: - oe->next_flush = ULLONG_MAX; show_progress = true; + __fallthrough; + case OE_FLUSH__TOP: + oe->next_flush = ULLONG_MAX; break; case OE_FLUSH__HALF: |