diff options
| author | Jiri Olsa <jolsa@redhat.com> | 2011-03-07 21:13:41 +0100 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2011-03-10 14:55:00 +0100 |
| commit | 6547250381eb315acff3d52b4872ad775359407c (patch) | |
| tree | 24573d9f54451eaaaa88def26d1aa32d4b7dbb0c /tools | |
| parent | perf top: Fix events overflow in top command (diff) | |
| download | linux-6547250381eb315acff3d52b4872ad775359407c.tar.xz linux-6547250381eb315acff3d52b4872ad775359407c.zip | |
perf top: Don't let events to eat up whole header line
Passing multiple events might force out information about pid/tid/cpu.
Attached patch leaves 30 characters for this info at the expense of the
events' names.
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Han Pingtian <phan@redhat.com>
LKML-Reference: <1299528821-17521-3-git-send-email-jolsa@redhat.com>
Signed-off-by: Jiri Olsa <jolsa@redhat.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools')
| -rw-r--r-- | tools/perf/util/top.c | 20 |
1 files changed, 17 insertions, 3 deletions
diff --git a/tools/perf/util/top.c b/tools/perf/util/top.c index 4f869da4e9c7..75cfe4d45119 100644 --- a/tools/perf/util/top.c +++ b/tools/perf/util/top.c @@ -115,9 +115,23 @@ size_t perf_top__header_snprintf(struct perf_top *top, char *bf, size_t size) if (!top->display_weighted) { ret += SNPRINTF(bf + ret, size - ret, "%s", event_name(top->sym_evsel)); - } else list_for_each_entry(counter, &top->evlist->entries, node) { - ret += SNPRINTF(bf + ret, size - ret, "%s%s", - counter->idx ? "/" : "", event_name(counter)); + } else { + /* + * Don't let events eat all the space. Leaving 30 bytes + * for the rest should be enough. + */ + size_t last_pos = size - 30; + + list_for_each_entry(counter, &top->evlist->entries, node) { + ret += SNPRINTF(bf + ret, size - ret, "%s%s", + counter->idx ? "/" : "", + event_name(counter)); + if (ret > last_pos) { + sprintf(bf + last_pos - 3, ".."); + ret = last_pos - 1; + break; + } + } } ret += SNPRINTF(bf + ret, size - ret, "], "); |