linux-kernel - [PATCH v4 08/12] perf c2c: Refactor node header

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Message-Id: <20220530114036.3225544-9-leo.yan@linaro.org>
Date:   Mon, 30 May 2022 19:40:32 +0800
From:   Leo Yan <leo.yan@...aro.org>
To:     Arnaldo Carvalho de Melo <acme@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...nel.org>,
        Namhyung Kim <namhyung@...nel.org>, Alyssa Ross <hi@...ssa.is>,
        Ian Rogers <irogers@...gle.com>, Like Xu <likexu@...cent.com>,
        Kajol Jain <kjain@...ux.ibm.com>,
        Li Huafei <lihuafei1@...wei.com>,
        Joe Mario <jmario@...hat.com>,
        Adam Li <adam.li@...erecomputing.com>,
        German Gomez <german.gomez@....com>,
        James Clark <james.clark@....com>,
        Ali Saidi <alisaidi@...zon.com>,
        linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     Leo Yan <leo.yan@...aro.org>
Subject: [PATCH v4 08/12] 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 other
snooping type 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 %peer %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>
Tested-by: Ali Saidi <alisaidi@...zon.com>
---
 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 d3608d24bea4..e76219034588 100644
--- a/tools/perf/builtin-c2c.c
+++ b/tools/perf/builtin-c2c.c
@@ -1723,12 +1723,6 @@ 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,
@@ -2229,9 +2223,27 @@ 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)
-- 
2.25.1