linux-kernel - [PATCH v2 08/11] perf c2c: Refactor node header

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Date:   Sun, 13 Dec 2020 13:38:47 +0000
From:   Leo Yan <leo.yan@...aro.org>
To:     Arnaldo Carvalho de Melo <acme@...nel.org>,
        Jiri Olsa <jolsa@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Namhyung Kim <namhyung@...nel.org>,
        Andi Kleen <ak@...ux.intel.com>,
        Ian Rogers <irogers@...gle.com>,
        Kan Liang <kan.liang@...ux.intel.com>,
        Joe Mario <jmario@...hat.com>, David Ahern <dsahern@...il.com>,
        Don Zickus <dzickus@...hat.com>, Al Grant <Al.Grant@....com>,
        James Clark <james.clark@....com>, linux-kernel@...r.kernel.org
Cc:     Leo Yan <leo.yan@...aro.org>
Subject: [PATCH v2 08/11] perf c2c: Refactor node header

The node header array contains 3 items, each item is used for one of
the 3 flavors for node accessing info.  To extend sorting on all load
references and not always stick to HITMs, the second header string
"Node{cpus %hitms %stores}" should be adjusted (e.g. it's changed as
"Node{cpus %loads %stores}").

For this reason, this patch changes the node header array to three
flat variables and uses switch-case in function setup_nodes_header(),
thus it is easier for altering the header string.

Signed-off-by: Leo Yan <leo.yan@...aro.org>
---
 tools/perf/builtin-c2c.c | 26 +++++++++++++++++++-------
 1 file changed, 19 insertions(+), 7 deletions(-)

diff --git a/tools/perf/builtin-c2c.c b/tools/perf/builtin-c2c.c
index 50018bfb1089..846ee58d6cfb 100644
--- a/tools/perf/builtin-c2c.c
+++ b/tools/perf/builtin-c2c.c
@@ -1806,12 +1806,6 @@ static struct c2c_dimension dim_dso = {
 	.se		= &sort_dso,
 };
 
-static struct c2c_header header_node[3] = {
-	HEADER_LOW("Node"),
-	HEADER_LOW("Node{cpus %hitms %stores}"),
-	HEADER_LOW("Node{cpu list}"),
-};
-
 static struct c2c_dimension dim_node = {
 	.name		= "node",
 	.cmp		= empty_cmp,
@@ -2293,9 +2287,27 @@ static int resort_cl_cb(struct hist_entry *he, void *arg __maybe_unused)
 	return 0;
 }
 
+static struct c2c_header header_node_0 = HEADER_LOW("Node");
+static struct c2c_header header_node_1 = HEADER_LOW("Node{cpus %hitms %stores}");
+static struct c2c_header header_node_2 = HEADER_LOW("Node{cpu list}");
+
 static void setup_nodes_header(void)
 {
-	dim_node.header = header_node[c2c.node_info];
+	switch (c2c.node_info) {
+	case 0:
+		dim_node.header = header_node_0;
+		break;
+	case 1:
+		dim_node.header = header_node_1;
+		break;
+	case 2:
+		dim_node.header = header_node_2;
+		break;
+	default:
+		break;
+	}
+
+	return;
 }
 
 static int setup_nodes(struct perf_session *session)
-- 
2.17.1