Commit-ID: 7111ffff60a68f55d864200cd6c7677319e5c242
Gitweb: http://git.kernel.org/tip/7111ffff60a68f55d864200cd6c7677319e5c242
Author: Namhyung Kim <namhyung@xxxxxxxxxx>
AuthorDate: Wed, 24 May 2017 15:21:29 +0900
Committer: Ingo Molnar <mingo@xxxxxxxxxx>
CommitDate: Wed, 24 May 2017 08:41:49 +0200
perf tools: Put caller above callee in --children mode
The __hpp__sort_acc() sorts entries using callchain depth in order to
put callers above in children mode. But it assumed the callchain order
was callee-first. Now default (for children) is caller-first so the
order of entries is reverted.
For example, consider following case:
$ perf report --no-children
..l
# Overhead Command Shared Object Symbol
# ........ ....... ................... ..........................
#
99.44% a.out a.out [.] main
|
---main
__libc_start_main
_start
Then children mode should show 'start' above '__libc_start_main' since
it's the caller (parent) of the __libc_start_main. But it's reversed:
# Children Self Command Shared Object Symbol
# ........ ........ ....... ............... .....................
#
99.61% 0.00% a.out libc-2.25.so [.] __libc_start_main
99.61% 0.00% a.out a.out [.] _start
99.54% 99.44% a.out a.out [.] main
This patch fixes it.
# Children Self Command Shared Object Symbol
# ........ ........ ....... ............... .....................
#
99.61% 0.00% a.out a.out [.] _start
99.61% 0.00% a.out libc-2.25.so [.] __libc_start_main
99.54% 99.44% a.out a.out [.] main
Signed-off-by: Namhyung Kim <namhyung@xxxxxxxxxx>
Acked-by: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
Cc: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
Cc: Frederic Weisbecker <fweisbec@xxxxxxxxx>
Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Cc: Milian Wolff <milian.wolff@xxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Yao Jin <yao.jin@xxxxxxxxxxxxxxx>
Cc: kernel-team@xxxxxxx
Link: http://lkml.kernel.org/r/20170524062129.32529-8-namhyung@xxxxxxxxxx
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
---
tools/perf/ui/hist.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/tools/perf/ui/hist.c b/tools/perf/ui/hist.c
index 59addd5..ddb2c6f 100644
--- a/tools/perf/ui/hist.c
+++ b/tools/perf/ui/hist.c
@@ -210,6 +210,8 @@ static int __hpp__sort_acc(struct hist_entry *a, struct hist_entry *b,
return 0;
ret = b->callchain->max_depth - a->callchain->max_depth;
+ if (callchain_param.order == ORDER_CALLER)
+ ret = -ret;
}
return ret;
}
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