From 4087d11cd9455cd28da0795504451d1188633a0d Mon Sep 17 00:00:00 2001 From: Namhyung Kim Date: Mon, 24 Nov 2014 17:13:26 +0900 Subject: [PATCH] perf hists browser: Print overhead percent value for first-level callchain Currently perf report on TUI doesn't print percent for first-level callchain entry. I guess it (wrongly) assumes that there's only a single callchain in the first level. This patch fixes it by handling the first level callchains same as others - if it's not 100% it should print the percent value. Also it'll affect other callchains in the other way around - if it's 100% (single callchain) it should not print the percentage. Before: - 30.95% 6.84% abc2 abc2 [.] a - a - 70.00% c - 100.00% apic_timer_interrupt smp_apic_timer_interrupt local_apic_timer_interrupt hrtimer_interrupt ... + 30.00% b + __libc_start_main After: - 30.95% 6.84% abc2 abc2 [.] a - 77.90% a - 70.00% c - apic_timer_interrupt smp_apic_timer_interrupt local_apic_timer_interrupt hrtimer_interrupt ... + 30.00% b + 22.10% __libc_start_main Reported-by: Arnaldo Carvalho de Melo Signed-off-by: Namhyung Kim Cc: Andi Kleen Cc: David Ahern Cc: Frederic Weisbecker Cc: Ingo Molnar Cc: Jiri Olsa Cc: Namhyung Kim Cc: Paul Mackerras Cc: Peter Zijlstra Link: http://lkml.kernel.org/r/1416816807-6495-1-git-send-email-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/ui/browsers/hists.c | 14 ++++++++++++-- 1 file changed, 12 insertions(+), 2 deletions(-) diff --git a/tools/perf/ui/browsers/hists.c b/tools/perf/ui/browsers/hists.c index 12c17c5a3d68..8d22905a4687 100644 --- a/tools/perf/ui/browsers/hists.c +++ b/tools/perf/ui/browsers/hists.c @@ -542,8 +542,11 @@ static int hist_browser__show_callchain(struct hist_browser *browser, struct rb_node *node; int first_row = row, offset = level * LEVEL_OFFSET_STEP; u64 new_total; + bool need_percent; node = rb_first(root); + need_percent = !!rb_next(node); + while (node) { struct callchain_node *child = rb_entry(node, struct callchain_node, rb_node); struct rb_node *next = rb_next(node); @@ -560,7 +563,7 @@ static int hist_browser__show_callchain(struct hist_browser *browser, if (first) first = false; - else if (level > 1) + else if (need_percent) extra_offset = LEVEL_OFFSET_STEP; folded_sign = callchain_list__folded(chain); @@ -573,7 +576,7 @@ static int hist_browser__show_callchain(struct hist_browser *browser, str = callchain_list__sym_name(chain, bf, sizeof(bf), browser->show_dso); - if (was_first && level > 1) { + if (was_first && need_percent) { double percent = cumul * 100.0 / total; if (asprintf(&alloc_str, "%2.2f%% %s", percent, str) < 0) @@ -790,6 +793,13 @@ static int hist_browser__show_entry(struct hist_browser *browser, .is_current_entry = current_entry, }; + if (callchain_param.mode == CHAIN_GRAPH_REL) { + if (symbol_conf.cumulate_callchain) + total = entry->stat_acc->period; + else + total = entry->stat.period; + } + printed += hist_browser__show_callchain(browser, &entry->sorted_chain, 1, row, total, hist_browser__show_callchain_entry, &arg,