Messages in this thread | | | Date | Mon, 22 Oct 2018 14:25:56 -0300 | From | Arnaldo Carvalho de Melo <> | Subject | Re: [PATCH 2/2] perf script: flush output stream after events in verbose mode |
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Em Mon, Oct 22, 2018 at 03:54:30PM +0200, Jiri Olsa escreveu: > On Mon, Oct 22, 2018 at 12:38:57PM +0200, Milian Wolff wrote: > > SNIP > > > > > > > diff --git a/tools/perf/builtin-script.c b/tools/perf/builtin-script.c > > > > > > index bd468b90801b..ca09b7d2adb7 100644 > > > > > > --- a/tools/perf/builtin-script.c > > > > > > +++ b/tools/perf/builtin-script.c > > > > > > @@ -1737,6 +1737,9 @@ static void process_event(struct perf_script > > > > > > *script, > > > > > > > > > > > > if (PRINT_FIELD(METRIC)) > > > > > > > > > > > > perf_sample__fprint_metric(script, thread, evsel, > > sample, fp); > > > > > > > > > > > > + > > > > > > + if (verbose) > > > > > > + fflush(fp); > > > > > > > > > > should we call fflush(NULL) to dump all the streams? > > > > > > > > > > the verbose goes to stderr and fp seems to be stdout byt default > > > > > > > > stderr isn't buffered, so we don't need to flush it. So personally, I > > > > don't > > > > see a need to dump all streams - fp should be enough? Can you maybe > > > > explain > > > > where it would be required to flush more buffers? > > > > > > hum, did not know stderr wasn't buffer > > > > > > I think there's perf script feature to store the events data to > > > separate files per each event.. but I guess we don't need to > > > flush them.. we just need to have stdout and stderr in sync IIUC > > > > Exactly, and that's achieved with this patch form what I see :) Or should we > > maybe instead call > > > > setbuf(fp, NULL); > > > > in verbose mode? > > I think your solution is ok > > Acked-by: Jiri Olsa <jolsa@redhat.com>
Thanks, applied.
- Arnaldo
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