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.t...@intel.com>
---
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 3a0f1a5..08910f0 100644
--- a/tools/perf/util/event.c
+++ b/tools/perf/util/event.c
@@ -886,8 +886,9 @@ 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;
--
1.7.1
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