[PATCH 38/57] perf c2c report: Add cpu cnt sort key

[Jiri Olsa]

Adding cpu count dimension key wrapper.

It is to be displayed in the single cacheline output:

  cpucnt

It displays number of distinct cpus that hit cacheline.

Link: http://lkml.kernel.org/n/tip-ib2kdwam52fby9u2k3ij6lhm@xxxxxxxxxxxxxx
Signed-off-by: Jiri Olsa <jolsa@xxxxxxxxxx>
---
 tools/perf/builtin-c2c.c | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/tools/perf/builtin-c2c.c b/tools/perf/builtin-c2c.c
index 5d42f7912450..2318249362f8 100644
--- a/tools/perf/builtin-c2c.c
+++ b/tools/perf/builtin-c2c.c
@@ -1012,6 +1012,20 @@ MEAN_ENTRY(mean_rmt_entry,  rmt_hitm);
 MEAN_ENTRY(mean_lcl_entry,  lcl_hitm);
 MEAN_ENTRY(mean_load_entry, load);
 
+static int
+cpucnt_entry(struct perf_hpp_fmt *fmt __maybe_unused, struct perf_hpp *hpp,
+	     struct hist_entry *he)
+{
+	struct c2c_hist_entry *c2c_he;
+	int width = c2c_width(fmt, hpp, he->hists);
+	char buf[10];
+
+	c2c_he = container_of(he, struct c2c_hist_entry, he);
+
+	snprintf(buf, 10, "%d", bitmap_weight(c2c_he->cpuset, c2c.cpus_cnt));
+	return snprintf(hpp->buf, hpp->size, "%*s", width, buf);
+}
+
 #define HEADER_LOW(__h)			\
 	{				\
 		.line[1] = {		\
@@ -1338,6 +1352,14 @@ static struct c2c_dimension dim_mean_load = {
 	.width		= 8,
 };
 
+static struct c2c_dimension dim_cpucnt = {
+	.header		= HEADER_BOTH("cpu", "cnt"),
+	.name		= "cpucnt",
+	.cmp		= empty_cmp,
+	.entry		= cpucnt_entry,
+	.width		= 8,
+};
+
 static struct c2c_dimension *dimensions[] = {
 	&dim_dcacheline,
 	&dim_offset,
@@ -1375,6 +1397,7 @@ static struct c2c_dimension *dimensions[] = {
 	&dim_mean_rmt,
 	&dim_mean_lcl,
 	&dim_mean_load,
+	&dim_cpucnt,
 	NULL,
 };
 
-- 
2.7.4