diff options
| author | Changbin Du <[email protected]> | 2023-05-13 15:40:00 +0800 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <[email protected]> | 2023-05-15 18:27:33 -0300 |
| commit | 40bf1cb07ee72480dd831d7a13e42728dfad35e2 (patch) | |
| tree | 9c9cbefea81e0f6ddd82de292157ac6f6350300c | |
| parent | 6d491b37e70daeb963e3b589b746d99b8b4b1357 (diff) | |
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 <[email protected]>
Cc: Adrian Hunter <[email protected]>
Cc: Alexander Shishkin <[email protected]>
Cc: Ian Rogers <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Mark Rutland <[email protected]>
Cc: Namhyung Kim <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
| -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); } } |