perf c2c report: Add 'cpucnt' sort key

It is to be displayed in the single cacheline output:

  cpucnt

It displays number of distinct cpus that hit cacheline.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Don Zickus <dzickus@redhat.com>
Cc: Joe Mario <jmario@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/n/tip-ib2kdwam52fby9u2k3ij6lhm@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

diff --git a/tools/perf/builtin-c2c.c b/tools/perf/builtin-c2c.c
index 043344a720bf3783e6ee74be251da5cebac487b2..2a1e883580a183fd7305ed159e44a391c68fdf0e 100644 (file)
--- a/tools/perf/builtin-c2c.c
+++ b/tools/perf/builtin-c2c.c
@@ -1015,6 +1015,20 @@ 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);
+
+       scnprintf(buf, 10, "%d", bitmap_weight(c2c_he->cpuset, c2c.cpus_cnt));
+       return scnprintf(hpp->buf, hpp->size, "%*s", width, buf);
+}
+
 #define HEADER_LOW(__h)                        \
        {                               \
                .line[1] = {            \
@@ -1341,6 +1355,14 @@ 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,
@@ -1378,6 +1400,7 @@ static struct c2c_dimension *dimensions[] = {
        &dim_mean_rmt,
        &dim_mean_lcl,
        &dim_mean_load,
+       &dim_cpucnt,
        NULL,
 };