diff options
| author | Jiri Olsa <jolsa@kernel.org> | 2019-04-16 18:01:23 +0200 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2019-04-17 19:30:11 +0200 |
| commit | adc6257c4a6f23ff97dca8314fcd33828e2d8db5 (patch) | |
| tree | d03a6aa8ffe1c6d6ddc54821e9336ce4208a460e | |
| parent | perf tools: Check maps for bpf programs (diff) | |
| download | linux-adc6257c4a6f23ff97dca8314fcd33828e2d8db5.tar.xz linux-adc6257c4a6f23ff97dca8314fcd33828e2d8db5.zip | |
perf evlist: Fix side band thread draining
Current perf_evlist__poll_thread() code could finish without draining
the data. Adding the logic that makes sure we won't finish before the
drain.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Song Liu <songliubraving@fb.com>
Fixes: 657ee5531903 ("perf evlist: Introduce side band thread")
Link: http://lkml.kernel.org/r/20190416160127.30203-9-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
| -rw-r--r-- | tools/perf/util/evlist.c | 14 |
1 files changed, 9 insertions, 5 deletions
diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c index 6689378ee577..51ead577533f 100644 --- a/tools/perf/util/evlist.c +++ b/tools/perf/util/evlist.c @@ -1868,12 +1868,12 @@ static void *perf_evlist__poll_thread(void *arg) { struct perf_evlist *evlist = arg; bool draining = false; - int i; + int i, done = 0; + + while (!done) { + bool got_data = false; - while (draining || !(evlist->thread.done)) { - if (draining) - draining = false; - else if (evlist->thread.done) + if (evlist->thread.done) draining = true; if (!draining) @@ -1894,9 +1894,13 @@ static void *perf_evlist__poll_thread(void *arg) pr_warning("cannot locate proper evsel for the side band event\n"); perf_mmap__consume(map); + got_data = true; } perf_mmap__read_done(map); } + + if (draining && !got_data) + break; } return NULL; } |