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perf callchain: Abstract callchain print function

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This is a preparation to support for printing other type of callchain
value like count or period.

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
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/1447047946-1691-4-git-send-email-namhyung@kernel.org
[ renamed new _sprintf_ operation to _scnprintf_ ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Namhyung Kim
2015-11-09 14:45:39 +09:00
committed by Arnaldo Carvalho de Melo
parent 26e779245d
commit 5ab250cafc
5 changed files with 57 additions and 27 deletions
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8
tools/perf/ui/browsers/hists.c
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@@ -592,7 +592,6 @@ static int hist_browser__show_callchain(struct hist_browser *browser,
while (node) {
struct callchain_node *child = rb_entry(node, struct callchain_node, rb_node);
struct rb_node *next = rb_next(node);
u64 cumul = callchain_cumul_hits(child);
struct callchain_list *chain;
char folded_sign = ' ';
int first = true;
@@ -619,9 +618,12 @@ static int hist_browser__show_callchain(struct hist_browser *browser,
browser->show_dso);
if (was_first && need_percent) {
double percent = cumul * 100.0 / total;
char buf[64];
if (asprintf(&alloc_str, "%2.2f%% %s", percent, str) < 0)
callchain_node__scnprintf_value(child, buf, sizeof(buf),
total);
if (asprintf(&alloc_str, "%s %s", buf, str) < 0)
str = "Not enough memory!";
else
str = alloc_str;