linux-kernel - [PATCH 4/6] perf report: Show branch info in callchain entry with stdio mode

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Message-Id: <1476869153-15424-5-git-send-email-yao.jin@linux.intel.com>
Date:   Wed, 19 Oct 2016 17:25:51 +0800
From:   Jin Yao <yao.jin@...ux.intel.com>
To:     acme@...nel.org, jolsa@...nel.org
Cc:     Linux-kernel@...r.kernel.org, ak@...ux.intel.com,
        kan.liang@...el.com, Jin Yao <yao.jin@...ux.intel.com>
Subject: [PATCH 4/6] perf report: Show branch info in callchain entry with stdio mode

If the branch is 100% predicated then the "predicated" is hide.
Similarly, if there is no branch tsx abort, the "abort" is hide.
There is only cycles shown (cycle is supported on skylake platform,
older platform would be 0).

One example is:

|--36.73%--__random_r random_r.c:392 (cycles:9)
|          __random_r random_r.c:357 (cycles:1)
|          __random random.c:293 (cycles:1)
|          __random random.c:293 (cycles:1)
|          __random random.c:291 (cycles:1)
|          __random random.c:291 (cycles:1)
|          __random random.c:291 (cycles:1)
|          __random random.c:288 (cycles:1)
|          rand rand.c:27 (cycles:1)
|          rand rand.c:26 (cycles:1)
|          rand@plt +4194304 (cycles:1)
|          rand@plt +4194304 (cycles:1)
|          compute_flag div.c:25 (cycles:1)
|          compute_flag div.c:22 (cycles:1)
|          main div.c:40 (cycles:1)
|          main div.c:40 (cycles:16)
|          main div.c:39 (cycles:16)
|          |
|          |--29.93%--main div.c:39 (predicted:50.6%, cycles:1)
|          |          main div.c:44 (predicted:50.6%, cycles:1)

Signed-off-by: Jin Yao <yao.jin@...ux.intel.com>
---
 tools/perf/ui/stdio/hist.c | 30 ++++++++++++++++++++++++++----
 1 file changed, 26 insertions(+), 4 deletions(-)

diff --git a/tools/perf/ui/stdio/hist.c b/tools/perf/ui/stdio/hist.c
index 89d8441..57e1f6f 100644
--- a/tools/perf/ui/stdio/hist.c
+++ b/tools/perf/ui/stdio/hist.c
@@ -41,7 +41,9 @@ static size_t ipchain__fprintf_graph(FILE *fp, struct callchain_node *node,
 {
 	int i;
 	size_t ret = 0;
-	char bf[1024];
+	char bf[1024], *alloc_str = NULL;
+	char buf[64];
+	const char *str;
 
 	ret += callchain__fprintf_left_margin(fp, left_margin);
 	for (i = 0; i < depth; i++) {
@@ -56,8 +58,21 @@ static size_t ipchain__fprintf_graph(FILE *fp, struct callchain_node *node,
 		} else
 			ret += fprintf(fp, "%s", "          ");
 	}
-	fputs(callchain_list__sym_name(chain, bf, sizeof(bf), false), fp);
+
+	str = callchain_list__sym_name(chain, bf, sizeof(bf), false);
+
+	if (symbol_conf.show_branchflag_count) {
+		callchain_list_counts__printf_value(chain, NULL,
+						    buf, sizeof(buf));
+		if (asprintf(&alloc_str, "%s%s", str, buf) < 0)
+			str = "Not enough memory!";
+		else
+			str = alloc_str;
+	}
+
+	fputs(str, fp);
 	fputc('\n', fp);
+	free(alloc_str);
 	return ret;
 }
 
@@ -219,8 +234,15 @@ static size_t callchain__fprintf_graph(FILE *fp, struct rb_root *root,
 			} else
 				ret += callchain__fprintf_left_margin(fp, left_margin);
 
-			ret += fprintf(fp, "%s\n", callchain_list__sym_name(chain, bf, sizeof(bf),
-							false));
+			ret += fprintf(fp, "%s",
+				       callchain_list__sym_name(chain, bf,
+								sizeof(bf),
+								false));
+
+			if (symbol_conf.show_branchflag_count)
+				ret += callchain_list_counts__printf_value(
+							chain, fp, NULL, 0);
+			ret += fprintf(fp, "\n");
 
 			if (++entries_printed == callchain_param.print_limit)
 				break;
-- 
2.7.4