From: Namhyung Kim Date: Wed, 13 Aug 2014 06:02:41 +0000 (+0900) Subject: perf hists browser: Fix a small callchain display bug X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=82162b5ae3d152fd7d887b36213f5b6785fe1294;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git perf hists browser: Fix a small callchain display bug The currently when perf TUI report shows callchain, the first level chains have bogus '+' sign even though only the last one has children. Since they are on a single line of the chain, toggling intermediate entries has no effect. Fix it to show '+' sign at the last entry only. Note that non-first level callchain entries don't have this problem. Before: --------------------------------------------------------------------------- Children Self Command Shared Object Symbols - 40.70% 0.00% swapper [kernel.kallsyms] [k] cpuidle_wrap_enter + cpuidle_wrap_enter + cpuidle_enter_tk + cpuidle_idle_call + cpu_idle After: --------------------------------------------------------------------------- Children Self Command Shared Object Symbols - 40.70% 0.00% swapper [kernel.kallsyms] [k] cpuidle_wrap_enter cpuidle_wrap_enter cpuidle_enter_tk cpuidle_idle_call + cpu_idle Signed-off-by: Namhyung Kim Acked-by: Ingo Molnar Cc: Andi Kleen Cc: Frederic Weisbecker Cc: Ingo Molnar Cc: Jiri Olsa Cc: Namhyung Kim Cc: Paul Mackerras Cc: Peter Zijlstra Cc: Frederic Weisbecker Link: http://lkml.kernel.org/r/1407909761-10822-1-git-send-email-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo --- diff --git a/tools/perf/ui/browsers/hists.c b/tools/perf/ui/browsers/hists.c index 045c1e16ac59..1818d1275d02 100644 --- a/tools/perf/ui/browsers/hists.c +++ b/tools/perf/ui/browsers/hists.c @@ -228,8 +228,10 @@ static void callchain_node__init_have_children(struct callchain_node *node) { struct callchain_list *chain; - list_for_each_entry(chain, &node->val, list) + if (!list_empty(&node->val)) { + chain = list_entry(node->val.prev, struct callchain_list, list); chain->ms.has_children = !RB_EMPTY_ROOT(&node->rb_root); + } callchain_node__init_have_children_rb_tree(node); }