diff options
| author | Namhyung Kim <namhyung@kernel.org> | 2016-09-12 15:19:52 +0900 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-10-31 04:14:01 -0600 |
| commit | 349eb2cf6d72b29228d4fb673faa26fec49ffd84 (patch) | |
| tree | 5d617e003f61b5bdce7831f076c495f904aecf25 /tools/perf | |
| parent | c869f386bbfdd9e19148b7ab60b8ea4fec676ec8 (diff) | |
perf hists browser: Fix event group display
commit d9ea48bc4e7cc297ca1073fa3f90ed80d964b7b4 upstream.
Milian reported that the event group on TUI shows duplicated overhead.
This was due to a bug on calculating hpp->buf position. The
hpp_advance() was called from __hpp__slsmg_color_printf() on TUI but
it's already called from the hpp__call_print_fn macro in __hpp__fmt().
The end result is that the print function returns number of bytes it
printed but the buffer advanced twice of the length.
This is generally not a problem since it doesn't need to access the
buffer again. But with event group, overhead needs to be printed
multiple times and hist_entry__snprintf_alignment() tries to fill the
space with buffer after it printed. So it (brokenly) showed the last
overhead again.
The bug was there from the beginning, but I think it's only revealed
when the alignment function was added.
Reported-by: Milian Wolff <milian.wolff@kdab.com>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Fixes: 89fee7094323 ("perf hists: Do column alignment on the format iterator")
Link: http://lkml.kernel.org/r/20160912061958.16656-2-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'tools/perf')
| -rw-r--r-- | tools/perf/ui/browsers/hists.c | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/tools/perf/ui/browsers/hists.c b/tools/perf/ui/browsers/hists.c index 3900386a3629..d802938644b5 100644 --- a/tools/perf/ui/browsers/hists.c +++ b/tools/perf/ui/browsers/hists.c @@ -684,7 +684,6 @@ static int __hpp__slsmg_color_printf(struct perf_hpp *hpp, const char *fmt, ...) ret = scnprintf(hpp->buf, hpp->size, fmt, len, percent); ui_browser__printf(arg->b, "%s", hpp->buf); - advance_hpp(hpp, ret); return ret; } |