Commit-ID: 1500b93b61fc70a1176871b64f1c8ae3bd4da9dd
Gitweb: http://git.kernel.org/tip/1500b93b61fc70a1176871b64f1c8ae3bd4da9dd
Author: Feng Tang <feng.tang@xxxxxxxxx>
AuthorDate: Fri, 7 Sep 2012 16:42:23 +0800
Committer: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
CommitDate: Mon, 17 Sep 2012 13:10:57 -0300
perf symbols: Filter samples with unresolved symbol when "--symbols" option is used
Report/top commands support to only handle specific symbols with
"--symbols" option, but current code will keep those samples whose
symbol can't be resolved, which should actually be filtered.
If we run following commands:
$perf record -a tree
$perf report --symbols intel_idle -n
the output will be:
Without the patch:
==================
46.27% 156 sshd [unknown]
26.05% 48 swapper [kernel.kallsyms]
17.26% 38 tree libc-2.12.1.so
7.69% 17 tree tree
2.73% 6 tree ld-2.12.1.so
With the patch:
===============
100.00% 48 swapper [kernel.kallsyms]
Signed-off-by: Feng Tang <feng.tang@xxxxxxxxx>
Cc: Andi Kleen <andi@xxxxxxxxxxxxxx>
Cc: David Ahern <dsahern@xxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxx>
Cc: Namhyung Kim <namhyung@xxxxxxxxxx>
Cc: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
Link: http://lkml.kernel.org/r/1347007349-3102-2-git-send-email-feng.tang@xxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
---
tools/perf/util/event.c | 5 +++--
1 files changed, 3 insertions(+), 2 deletions(-)
diff --git a/tools/perf/util/event.c b/tools/perf/util/event.c
index 8202f5c..6715b19 100644
--- a/tools/perf/util/event.c
+++ b/tools/perf/util/event.c
@@ -904,8 +904,9 @@ int perf_event__preprocess_sample(const union perf_event *event,
al->sym = map__find_symbol(al->map, al->addr, filter);
}
- if (symbol_conf.sym_list && al->sym &&
- !strlist__has_entry(symbol_conf.sym_list, al->sym->name))
+ if (symbol_conf.sym_list &&
+ (!al->sym || !strlist__has_entry(symbol_conf.sym_list,
+ al->sym->name)))
goto out_filtered;
return 0;
--
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