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perf report: Add callchain value option

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Now -g/--call-graph option supports how to display callchain values.
Possible values are 'percent', 'period' and 'count'.  The percent is
same as before and it's the default behavior.  The period displays the
raw period value rather than the percentage.  The count displays the
number of occurrences.

  $ perf report --no-children --stdio -g percent
  ...
    39.93%  swapper  [kernel.vmlinux]  [k] intel_idel
            |
            ---intel_idle
               cpuidle_enter_state
               cpuidle_enter
               call_cpuidle
               cpu_startup_entry
               |
               |--28.63%-- start_secondary
               |
                --11.30%-- rest_init

  $ perf report --no-children --show-total-period --stdio -g period
  ...
    39.93%   13018705  swapper  [kernel.vmlinux]  [k] intel_idel
            |
            ---intel_idle
               cpuidle_enter_state
               cpuidle_enter
               call_cpuidle
               cpu_startup_entry
               |
               |--9334403-- start_secondary
               |
                --3684302-- rest_init

  $ perf report --no-children --show-nr-samples --stdio -g count
  ...
    39.93%     80  swapper  [kernel.vmlinux]  [k] intel_idel
            |
            ---intel_idle
               cpuidle_enter_state
               cpuidle_enter
               call_cpuidle
               cpu_startup_entry
               |
               |--57-- start_secondary
               |
                --23-- rest_init

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Acked-by: Brendan Gregg <brendan.d.gregg@gmail.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Kan Liang <kan.liang@intel.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1447047946-1691-6-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Namhyung Kim
2015-11-09 14:45:41 +09:00
committed by Arnaldo Carvalho de Melo
parent 5e47f8ff40
commit f2af008695
6 changed files with 84 additions and 18 deletions
Download Patch File Download Diff File Expand all files Collapse all files

13
tools/perf/Documentation/perf-report.txt
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@@ -170,11 +170,11 @@ OPTIONS
Dump raw trace in ASCII.
-g::
--call-graph=<print_type,threshold[,print_limit],order,sort_key,branch>::
--call-graph=<print_type,threshold[,print_limit],order,sort_key[,branch],value>::
Display call chains using type, min percent threshold, print limit,
call order, sort key and branch. Note that ordering of parameters is not
fixed so any parement can be given in an arbitraty order. One exception
is the print_limit which should be preceded by threshold.
call order, sort key, optional branch and value. Note that ordering of
parameters is not fixed so any parement can be given in an arbitraty order.
One exception is the print_limit which should be preceded by threshold.
print_type can be either:
- flat: single column, linear exposure of call chains.
@@ -205,6 +205,11 @@ OPTIONS
- branch: include last branch information in callgraph when available.
Usually more convenient to use --branch-history for this.
value can be:
- percent: diplay overhead percent (default)
- period: display event period
- count: display event count
--children::
Accumulate callchain of children to parent entry so that then can
show up in the output. The output will have a new "Children" column