perf c2c report: Add shared cachelines stats stdio output

Display global shared cachelines related stats table as part of the
stdio output or when --stats option is speicified:

  $ perf c2c report --stats
  ...
  =================================================
      Global Shared Cache Line Event Information
  =================================================
    Total Shared Cache Lines          :       1384
    Load HITs on shared lines         :       5995
    Fill Buffer Hits on shared lines  :       1726
    L1D hits on shared lines          :       1943
    L2D hits on shared lines          :          0
    LLC hits on shared lines          :       1360
    Locked Access on shared lines     :       1993
    Store HITs on shared lines        :       1504
    Store L1D hits on shared lines    :       1446
    Total Merged records              :       3527

Original-patch-by: Dick Fowles <rfowles@redhat.com>
Original-patch-by: Don Zickus <dzickus@redhat.com>
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Ahern <dsahern@gmail.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-p0gty8ctbdzisrniwqxhqmhq@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

1 files changed, 61 insertions, 1 deletions

diff --git a/tools/perf/builtin-c2c.c b/tools/perf/builtin-c2c.c
index 232d5f5ac7a2..f7b118b759cf 100644
--- a/tools/perf/builtin-c2c.c
+++ b/tools/perf/builtin-c2c.c
@@ -56,6 +56,10 @@ struct perf_c2c {
         bool                     show_src;
         bool                     use_stdio;
         bool                     stats_only;
+
+        /* HITM shared clines stats */
+        struct c2c_stats        hitm_stats;
+        int                     shared_clines;
 };
 
 static struct perf_c2c c2c;
@@ -1732,6 +1736,39 @@ static int setup_nodes(struct perf_session *session)
         return 0;
 }
 
+#define HAS_HITMS(__h) ((__h)->stats.lcl_hitm || (__h)->stats.rmt_hitm)
+
+static int resort_hitm_cb(struct hist_entry *he)
+{
+        struct c2c_hist_entry *c2c_he;
+        c2c_he = container_of(he, struct c2c_hist_entry, he);
+
+        if (HAS_HITMS(c2c_he)) {
+                c2c.shared_clines++;
+                c2c_add_stats(&c2c.hitm_stats, &c2c_he->stats);
+        }
+
+        return 0;
+}
+
+static int hists__iterate_cb(struct hists *hists, hists__resort_cb_t cb)
+{
+        struct rb_node *next = rb_first(&hists->entries);
+        int ret = 0;
+
+        while (next) {
+                struct hist_entry *he;
+
+                he = rb_entry(next, struct hist_entry, rb_node);
+                ret = cb(he);
+                if (ret)
+                        break;
+                next = rb_next(&he->rb_node);
+        }
+
+        return ret;
+}
+
 static void print_c2c__display_stats(FILE *out)
 {
         int llc_misses;
@@ -1777,6 +1814,26 @@ static void print_c2c__display_stats(FILE *out)
         fprintf(out, "  Unable to parse data source       : %10d\n", stats->noparse);
 }
 
+static void print_shared_cacheline_info(FILE *out)
+{
+        struct c2c_stats *stats = &c2c.hitm_stats;
+        int hitm_cnt = stats->lcl_hitm + stats->rmt_hitm;
+
+        fprintf(out, "=================================================\n");
+        fprintf(out, "    Global Shared Cache Line Event Information   \n");
+        fprintf(out, "=================================================\n");
+        fprintf(out, "  Total Shared Cache Lines          : %10d\n", c2c.shared_clines);
+        fprintf(out, "  Load HITs on shared lines         : %10d\n", stats->load);
+        fprintf(out, "  Fill Buffer Hits on shared lines  : %10d\n", stats->ld_fbhit);
+        fprintf(out, "  L1D hits on shared lines          : %10d\n", stats->ld_l1hit);
+        fprintf(out, "  L2D hits on shared lines          : %10d\n", stats->ld_l2hit);
+        fprintf(out, "  LLC hits on shared lines          : %10d\n", stats->ld_llchit + stats->lcl_hitm);
+        fprintf(out, "  Locked Access on shared lines     : %10d\n", stats->locks);
+        fprintf(out, "  Store HITs on shared lines        : %10d\n", stats->store);
+        fprintf(out, "  Store L1D hits on shared lines    : %10d\n", stats->st_l1hit);
+        fprintf(out, "  Total Merged records              : %10d\n", hitm_cnt + stats->store);
+}
+
 static void print_cacheline(struct c2c_hists *c2c_hists,
                             struct hist_entry *he_cl,
                             struct perf_hpp_list *hpp_list,
@@ -1841,6 +1898,8 @@ static void perf_c2c__hists_fprintf(FILE *out)
         setup_pager();
 
         print_c2c__display_stats(out);
+        fprintf(out, "\n");
+        print_shared_cacheline_info(out);
 
         if (c2c.stats_only)
                 return;
@@ -2131,7 +2190,8 @@ static int perf_c2c__report(int argc, const char **argv)
         ui_progress__init(&prog, c2c.hists.hists.nr_entries, "Sorting...");
 
         hists__collapse_resort(&c2c.hists.hists, NULL);
-        hists__output_resort_cb(&c2c.hists.hists, &prog, resort_cl_cb);
+        hists__output_resort_cb(&c2c.hists.hists, &prog, resort_hitm_cb);
+        hists__iterate_cb(&c2c.hists.hists, resort_cl_cb);
 
         ui_progress__finish();