The callchain stdio mode display was written using a sorted by symbol
report. In this mode we have only one callchain root per hist so we
forgot to handle cases where we have multiple callchain root, as in per
dso sorting for example.
Fix this by handling these roots like any other branch, with the hist as
the parent.
Before:
1.97% libpthread-2.12.1.so
|
--- __libc_write
create_worker
bench_sched_messaging
cmd_bench
run_builtin
main
__libc_start_main
|
--- __libc_read
create_worker
bench_sched_messaging
cmd_bench
run_builtin
main
__libc_start_main
After:
1.97% libpthread-2.12.1.so
|
|--36.97%-- __libc_write
| create_worker
| bench_sched_messaging
| cmd_bench
| run_builtin
| main
| __libc_start_main
|
|--31.47%-- __libc_read
| create_worker
| bench_sched_messaging
| cmd_bench
| run_builtin
| main
| __libc_start_main
...
Single roots keep their entry without percentage because they have
the same overhead than the hist they refer to. ie: 100% in fractal
mode and the percentage of the hist in graph mode:
0.00% [k] reschedule_interrupt
|
--- default_idle
amd_e400_idle
cpu_idle
start_secondary
Reported-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1332526010-15400-1-git-send-email-fweisbec@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
6d4818c524