diff options
| author | Changbin Du <changbin.du@huawei.com> | 2023-05-13 10:40:00 +0300 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2023-05-16 00:27:33 +0300 |
| commit | 40bf1cb07ee72480dd831d7a13e42728dfad35e2 (patch) | |
| tree | 9c9cbefea81e0f6ddd82de292157ac6f6350300c /tools/perf | |
| parent | 6d491b37e70daeb963e3b589b746d99b8b4b1357 (diff) | |
| download | linux-40bf1cb07ee72480dd831d7a13e42728dfad35e2.tar.xz | |
perf ftrace: Flush output after each writing
The pager will result stdout in full buffering mode instead of line
buffering. We need to make the trace visible timely.
Signed-off-by: Changbin Du <changbin.du@huawei.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20230513074000.733550-1-changbin.du@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf')
| -rw-r--r-- | tools/perf/builtin-ftrace.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/tools/perf/builtin-ftrace.c b/tools/perf/builtin-ftrace.c index 810e3376c7d6..ad2a9ae041f6 100644 --- a/tools/perf/builtin-ftrace.c +++ b/tools/perf/builtin-ftrace.c @@ -650,6 +650,8 @@ static int __cmd_ftrace(struct perf_ftrace *ftrace) break; if (fwrite(buf, n, 1, stdout) != 1) break; + /* flush output since stdout is in full buffering mode due to pager */ + fflush(stdout); } } |