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perf top: Don't let events to eat up whole header line

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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>
This commit is contained in:
Jiri Olsa 2011-03-07 21:13:41 +01:00 committed by Arnaldo Carvalho de Melo
parent b9a46bba88
commit 6547250381
1 changed files with 17 additions and 3 deletions
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20
tools/perf/util/top.c
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@ -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, "], ");