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perf hists browser: Support flat callchains

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The flat callchain mode is to print all chains in a single, simple
hierarchy so make it easy to see.

Currently perf report --tui doesn't show flat callchains properly.  With
flat callchains, only leaf nodes are added to the final rbtree so it
should show entries in parent nodes.  To do that, add parent_val list to
struct callchain_node and show them along with the (normal) val list.

For example, consider following callchains with '-g graph'.

  $ perf report -g graph
  - 39.93%  swapper  [kernel.vmlinux]  [k] intel_idle
       intel_idle
       cpuidle_enter_state
       cpuidle_enter
       call_cpuidle
     - cpu_startup_entry
          28.63% start_secondary
        - 11.30% rest_init
             start_kernel
             x86_64_start_reservations
             x86_64_start_kernel

Before:
  $ perf report -g flat
  - 39.93%  swapper  [kernel.vmlinux]  [k] intel_idle
       28.63% start_secondary
     - 11.30% rest_init
          start_kernel
          x86_64_start_reservations
          x86_64_start_kernel

After:
  $ perf report -g flat
  - 39.93%  swapper  [kernel.vmlinux]  [k] intel_idle
     - 28.63% intel_idle
          cpuidle_enter_state
          cpuidle_enter
          call_cpuidle
          cpu_startup_entry
          start_secondary
     - 11.30% intel_idle
          cpuidle_enter_state
          cpuidle_enter
          call_cpuidle
          cpu_startup_entry
          start_kernel
          x86_64_start_reservations
          x86_64_start_kernel

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Tested-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/1447047946-1691-8-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 14:45:43 +09:00
committed by Arnaldo Carvalho de Melo
parent 18bb838129
commit 4b3a321223
3 changed files with 166 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
tools/perf/util/callchain.h
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@@ -56,6 +56,7 @@ enum chain_order {
struct callchain_node {
struct callchain_node *parent;
struct list_head val;
struct list_head parent_val;
struct rb_node rb_node_in; /* to insert nodes in an rbtree */
struct rb_node rb_node; /* to sort nodes in an output tree */
struct rb_root rb_root_in; /* input tree of children */
@@ -251,5 +252,6 @@ int callchain_node__fprintf_value(struct callchain_node *node,
FILE *fp, u64 total);
void free_callchain(struct callchain_root *root);
int callchain_node__make_parent_list(struct callchain_node *node);
#endif /* __PERF_CALLCHAIN_H */