From: changbin.du@intel.com
To: jolsa@kernel.org
Cc: peterz@infradead.org, mingo@redhat.com,
alexander.shishkin@linux.intel.com, linux-kernel@vger.kernel.org,
changbin.du@intel.com
Subject: [PATCH v3] perf sort: only insert overhead && overhead_children when no overhead* field given
Date: Wed, 5 Jul 2017 11:35:52 +0800 [thread overview]
Message-ID: <1499225752-2959-1-git-send-email-changbin.du@intel.com> (raw)
In-Reply-To: <1496307801-24134-1-git-send-email-changbin.du@intel.com>
From: Changbin Du <changbin.du@intel.com>
If we always insert 'overhead' and 'overhead_children' as sort keys,
this make it impossible to sort as overhead (which displayed as Self)
first.Ths will be a problem if the data is collected with call-graph
enabled. Then we never can sort the result as self-overhead on this
data. And sometimes the data is hard to collect.
> perf record -ag
> perf report -s overhead,sym
Samples: 7K of event 'cycles', Event count (approx.): 865138253
Children Self Symbol
+ 26.41% 0.00% [k] verify_cpu
+ 26.37% 0.04% [k] cpu_startup_entry
+ 25.93% 0.27% [k] do_idle
+ 19.88% 0.00% [k] start_secondary
....
I intend to sort as 'Self', but actually it sort as 'Children'.
This patch fix this by only insert overhead && overhead_children
when no overhead* field given.
Signed-off-by: Changbin Du <changbin.du@intel.com>
---
v3: Add comment in code from Jiri
v2: Add the example in commit message.
---
tools/perf/util/sort.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/tools/perf/util/sort.c b/tools/perf/util/sort.c
index 8b327c9..9e087fb 100644
--- a/tools/perf/util/sort.c
+++ b/tools/perf/util/sort.c
@@ -2635,6 +2635,13 @@ static char *setup_overhead(char *keys)
if (sort__mode == SORT_MODE__DIFF)
return keys;
+ /**
+ * User already stated overhead within -s option,
+ * do not mangle with that.
+ */
+ if (strstr(keys, "overhead"))
+ return keys;
+
keys = prefix_if_not_in("overhead", keys);
if (symbol_conf.cumulate_callchain)
--
2.7.4
next prev parent reply other threads:[~2017-07-05 3:40 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-06-01 9:03 [PATCH] perf sort: only insert overhead && overhead_children when no overhead* field given changbin.du
2017-06-01 10:21 ` Jiri Olsa
2017-06-02 2:52 ` Du, Changbin
2017-06-02 3:22 ` Du, Changbin
2017-06-02 4:22 ` [PATCH v2] " changbin.du
2017-06-26 8:06 ` Du, Changbin
2017-06-29 15:22 ` Jiri Olsa
2017-07-05 3:02 ` Du, Changbin
2017-07-05 3:35 ` changbin.du [this message]
2017-07-06 16:04 ` [PATCH v3] " Jiri Olsa
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