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Date: Wed, 23 Oct 2013 00:54:57 -0700 From: tip-bot for Namhyung Kim <tipbot@...or.com> To: linux-tip-commits@...r.kernel.org Cc: acme@...hat.com, linux-kernel@...r.kernel.org, paulus@...ba.org, hpa@...or.com, mingo@...nel.org, a.p.zijlstra@...llo.nl, torvalds@...ux-foundation.org, namhyung.kim@....com, namhyung@...nel.org, jolsa@...hat.com, dsahern@...il.com, tglx@...utronix.de Subject: [tip:perf/core] perf tools: Compare dso' s also when comparing symbols Commit-ID: 09600e0f9ebb06235b852a646a3644b7d4a71aca Gitweb: http://git.kernel.org/tip/09600e0f9ebb06235b852a646a3644b7d4a71aca Author: Namhyung Kim <namhyung.kim@....com> AuthorDate: Tue, 15 Oct 2013 11:01:56 +0900 Committer: Arnaldo Carvalho de Melo <acme@...hat.com> CommitDate: Mon, 21 Oct 2013 17:33:23 -0300 perf tools: Compare dso's also when comparing symbols Linus reported that sometimes 'perf report -s symbol' exits without any message on TUI. David and Jiri found that it's because it failed to add a hist entry due to an invalid symbol length. It turns out that sorting by symbol (address) was broken since it only compares symbol addresses. The symbol address is a relative address within a dso thus just checking its address can result in merging unrelated symbols together. Fix it by checking dso before comparing symbol address. Reported-by: Linus Torvalds <torvalds@...ux-foundation.org> Signed-off-by: Namhyung Kim <namhyung@...nel.org> Cc: David Ahern <dsahern@...il.com> Cc: Ingo Molnar <mingo@...nel.org> Cc: Jiri Olsa <jolsa@...hat.com> Cc: Paul Mackerras <paulus@...ba.org> Cc: Peter Zijlstra <a.p.zijlstra@...llo.nl> Link: http://lkml.kernel.org/r/1381802517-18812-1-git-send-email-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com> --- tools/perf/util/sort.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/tools/perf/util/sort.c b/tools/perf/util/sort.c index 32c5637..1f9821d 100644 --- a/tools/perf/util/sort.c +++ b/tools/perf/util/sort.c @@ -182,9 +182,19 @@ static int64_t _sort__sym_cmp(struct symbol *sym_l, struct symbol *sym_r) static int64_t sort__sym_cmp(struct hist_entry *left, struct hist_entry *right) { + int64_t ret; + if (!left->ms.sym && !right->ms.sym) return right->level - left->level; + /* + * comparing symbol address alone is not enough since it's a + * relative address within a dso. + */ + ret = sort__dso_cmp(left, right); + if (ret != 0) + return ret; + return _sort__sym_cmp(left->ms.sym, right->ms.sym); } -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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