Adding HITM percent dimension key wrapper.

It is to be displayed in the main cachelines
overall output:

  percent_hitm

It displays HITMs percentage for cacheline.

It counts remote HITMs at the moment, but it
is changed later to support local as well,
based on the sort configuration.

Link: http://lkml.kernel.org/n/tip-czd17qsh5u5z0yc1estz9...@git.kernel.org
Signed-off-by: Jiri Olsa <jo...@kernel.org>
---
 tools/perf/builtin-c2c.c | 87 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 87 insertions(+)

diff --git a/tools/perf/builtin-c2c.c b/tools/perf/builtin-c2c.c
index 11b3db91fce9..e24472f100c6 100644
--- a/tools/perf/builtin-c2c.c
+++ b/tools/perf/builtin-c2c.c
@@ -562,6 +562,83 @@ tot_loads_cmp(struct perf_hpp_fmt *fmt __maybe_unused,
        return tot_recs_left - tot_recs_right;
 }
 
+typedef double (get_percent_cb)(struct c2c_hist_entry *);
+
+static int
+percent_color(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp,
+             struct hist_entry *he, get_percent_cb get_percent)
+{
+       struct c2c_hist_entry *c2c_he;
+       int width = c2c_width(fmt, hpp, he->hists);
+       double per;
+
+       c2c_he = container_of(he, struct c2c_hist_entry, he);
+       per = get_percent(c2c_he);
+
+       return hpp_color_scnprintf(hpp, "%*.2f%%", width - 1, per);
+}
+
+static double percent_hitm(struct c2c_hist_entry *c2c_he)
+{
+       struct c2c_hists *hists;
+       struct c2c_stats *stats;
+       struct c2c_stats *total;
+       int tot, st;
+       double p;
+
+       hists = container_of(c2c_he->he.hists, struct c2c_hists, hists);
+       stats = &c2c_he->stats;
+       total = &hists->stats;
+
+       st  = stats->rmt_hitm;
+       tot = total->rmt_hitm;
+
+       p = tot ? (double) st / tot : 0;
+
+       return 100 * p;
+}
+
+static int
+percent_hitm_entry(struct perf_hpp_fmt *fmt, 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];
+       double per;
+
+       c2c_he = container_of(he, struct c2c_hist_entry, he);
+       per = percent_hitm(c2c_he);
+
+       snprintf(buf, 10, "%.2F%%", per);
+       return snprintf(hpp->buf, hpp->size, "%*s", width, buf);
+}
+
+static int
+percent_hitm_color(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp,
+                  struct hist_entry *he)
+{
+       return percent_color(fmt, hpp, he, percent_hitm);
+}
+
+static int64_t
+percent_hitm_cmp(struct perf_hpp_fmt *fmt __maybe_unused,
+                struct hist_entry *left, struct hist_entry *right)
+{
+       struct c2c_hist_entry *c2c_left;
+       struct c2c_hist_entry *c2c_right;
+       double per_left;
+       double per_right;
+
+       c2c_left  = container_of(left, struct c2c_hist_entry, he);
+       c2c_right = container_of(right, struct c2c_hist_entry, he);
+
+       per_left  = percent_hitm(c2c_left);
+       per_right = percent_hitm(c2c_right);
+
+       return per_left - per_right;
+}
+
 #define HEADER_LOW(__h)                        \
        {                               \
                .line[1] = {            \
@@ -765,6 +842,15 @@ static struct c2c_dimension dim_tot_loads = {
        .width          = 7,
 };
 
+static struct c2c_dimension dim_percent_hitm = {
+       .header         = HEADER_LOW("%hitm"),
+       .name           = "percent_hitm",
+       .cmp            = percent_hitm_cmp,
+       .entry          = percent_hitm_entry,
+       .color          = percent_hitm_color,
+       .width          = 7,
+};
+
 static struct c2c_dimension *dimensions[] = {
        &dim_dcacheline,
        &dim_offset,
@@ -787,6 +873,7 @@ static struct c2c_dimension *dimensions[] = {
        &dim_ld_llcmiss,
        &dim_tot_recs,
        &dim_tot_loads,
+       &dim_percent_hitm,
        NULL,
 };
 
-- 
2.7.4

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