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>
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@ -115,9 +115,23 @@ size_t perf_top__header_snprintf(struct perf_top *top, char *bf, size_t size)
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if (!top->display_weighted) {
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ret += SNPRINTF(bf + ret, size - ret, "%s",
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event_name(top->sym_evsel));
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} else list_for_each_entry(counter, &top->evlist->entries, node) {
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ret += SNPRINTF(bf + ret, size - ret, "%s%s",
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counter->idx ? "/" : "", event_name(counter));
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} else {
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/*
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* Don't let events eat all the space. Leaving 30 bytes
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* for the rest should be enough.
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*/
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size_t last_pos = size - 30;
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list_for_each_entry(counter, &top->evlist->entries, node) {
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ret += SNPRINTF(bf + ret, size - ret, "%s%s",
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counter->idx ? "/" : "",
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event_name(counter));
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if (ret > last_pos) {
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sprintf(bf + last_pos - 3, "..");
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ret = last_pos - 1;
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break;
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}
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}
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}
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ret += SNPRINTF(bf + ret, size - ret, "], ");
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