linux-kernel - [tip:perf/core] perf report: Show branch info in callchain entry for stdio mode

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Message-ID: <tip-8577ae6b040022ed3ecd11dc395df7af59cce503@git.kernel.org>
Date:   Tue, 15 Nov 2016 02:48:37 -0800
From:   tip-bot for Jin Yao <tipbot@...or.com>
To:     linux-tip-commits@...r.kernel.org
Cc:     mingo@...nel.org, ak@...ux.intel.com, kan.liang@...el.com,
        tglx@...utronix.de, acme@...hat.com, hpa@...or.com,
        jolsa@...nel.org, linux-kernel@...r.kernel.org,
        yao.jin@...ux.intel.com
Subject: [tip:perf/core] perf report: Show branch info in callchain entry
 for stdio mode

Commit-ID:  8577ae6b040022ed3ecd11dc395df7af59cce503
Gitweb:     http://git.kernel.org/tip/8577ae6b040022ed3ecd11dc395df7af59cce503
Author:     Jin Yao <yao.jin@...ux.intel.com>
AuthorDate: Mon, 31 Oct 2016 09:19:52 +0800
Committer:  Arnaldo Carvalho de Melo <acme@...hat.com>
CommitDate: Mon, 14 Nov 2016 13:33:47 -0300

perf report: Show branch info in callchain entry for stdio mode

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

If no iterations, the "iterations" is hidden.

For example:

|--29.93%--main div.c:39 (predicted:50.6%, cycles:1, iterations:18)
|          main div.c:44 (predicted:50.6%, cycles:1)
|          |
|           --22.69%--main div.c:42 (cycles:2, iterations:17)
|                     compute_flag div.c:28 (cycles:2)
|                     |
|                      --10.52%--compute_flag div.c:27 (cycles:1)
|                                rand rand.c:28 (cycles:1)
|                                rand rand.c:28 (cycles:1)
|                                __random random.c:298 (cycles:1)
|                                __random random.c:297 (cycles:1)
|                                __random random.c:295 (cycles:1)
|                                __random random.c:295 (cycles:1)
|                                __random random.c:295 (cycles:1)
|                                __random random.c:295 (cycles:6)

Signed-off-by: Yao Jin <yao.jin@...ux.intel.com>
Acked-by: Andi Kleen <ak@...ux.intel.com>
Cc: Jiri Olsa <jolsa@...nel.org>
Cc: Kan Liang <kan.liang@...el.com>
Cc: Linux-kernel@...r.kernel.org
Cc: Yao Jin <yao.jin@...ux.intel.com>
Link: http://lkml.kernel.org/r/1477876794-30749-5-git-send-email-yao.jin@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
 tools/perf/ui/stdio/hist.c | 35 +++++++++++++++++++++++++++++++----
 1 file changed, 31 insertions(+), 4 deletions(-)

diff --git a/tools/perf/ui/stdio/hist.c b/tools/perf/ui/stdio/hist.c
index 89d8441..668f4ae 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 +58,26 @@ 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) {
+		if (!period)
+			callchain_list_counts__printf_value(node, chain, NULL,
+							    buf, sizeof(buf));
+		else
+			callchain_list_counts__printf_value(NULL, 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 +239,15 @@ 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(
+						NULL, chain, fp, NULL, 0);
+			ret += fprintf(fp, "\n");
 
 			if (++entries_printed == callchain_param.print_limit)
 				break;