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When the hierarchy mode is used, some entries might be omiited due to a
percent limit or filter. In this case the output hierarchy is different
than other entries. Add an informative message to users about this.
For example, when 4% of percent limit is applied:
Before:
# Overhead Command / Shared Object / Symbol
# .............. ..........................................
#
49.09% swapper
48.67% [kernel.vmlinux]
34.42% [k] intel_idle
11.51% firefox
8.87% libpthread-2.22.so
6.60% [.] __GI___libc_recvmsg
10.49% gnome-shell
4.74% libc-2.22.so
10.08% Xorg
6.11% libc-2.22.so
5.27% [.] __memcpy_sse2_unaligned
6.15% perf
Note that, gnome-shell/libc has no symbols and perf has no dso/symbols.
With that patch the output will look like below:
After:
# Overhead Command / Shared Object / Symbol
# .............. ..........................................
#
49.09% swapper
48.67% [kernel.vmlinux]
34.42% [k] intel_idle
11.51% firefox
8.87% libpthread-2.22.so
6.60% [.] __GI___libc_recvmsg
10.49% gnome-shell
4.74% libc-2.22.so
no entry >= 4.00%
10.08% Xorg
6.11% libc-2.22.so
5.27% [.] __memcpy_sse2_unaligned
6.15% perf
no entry >= 4.00%
Suggested-and-Tested-by: Arnaldo Carvalho de Melo <acme@kernel.org>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/r/1456488800-28124-2-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
bd4abd39db