perf c2c report: Add global stats stdio output

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

  $ perf c2c report --stats
  =================================================
              Trace Event Information
  =================================================
    Total records                     :      41237
    Locked Load/Store Operations      :       4075
    Load Operations                   :      20526
    Loads - uncacheable               :          0
    Loads - IO                        :          0
    Loads - Miss                      :        552
    Loads - no mapping                :         31
    Load Fill Buffer Hit              :       7333
    Load L1D hit                      :       6398
    Load L2D hit                      :        144
    Load LLC hit                      :       4889
    Load Local HITM                   :       1185
    Load Remote HITM                  :        838
    Load Remote HIT                   :         52
    Load Local DRAM                   :        183
    Load Remote DRAM                  :        106
    Load MESI State Exclusive         :        289
    Load MESI State Shared            :          0
    Load LLC Misses                   :       1179
    LLC Misses to Local DRAM          :       15.5%
    LLC Misses to Remote DRAM         :        9.0%
    LLC Misses to Remote cache (HIT)  :        4.4%
    LLC Misses to Remote cache (HITM) :       71.1%
    Store Operations                  :      20711
    Store - uncacheable               :          0
    Store - no mapping                :          1
    Store L1D Hit                     :      20158
    Store L1D Miss                    :        552
    No Page Map Rejects               :          7
    Unable to parse data source       :          0

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-qkyvao3qsrnwazf0w1jvsh7z@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/builtin-c2c.c

@@ -55,6 +55,7 @@ struct perf_c2c {
 
 	bool			 show_src;
 	bool			 use_stdio;
+	bool			 stats_only;
 };
 
 static struct perf_c2c c2c;
@@ -1731,6 +1732,51 @@ static int setup_nodes(struct perf_session *session)
 	return 0;
 }
 
+static void print_c2c__display_stats(FILE *out)
+{
+	int llc_misses;
+	struct c2c_stats *stats = &c2c.hists.stats;
+
+	llc_misses = stats->lcl_dram +
+		     stats->rmt_dram +
+		     stats->rmt_hit +
+		     stats->rmt_hitm;
+
+	fprintf(out, "=================================================\n");
+	fprintf(out, "            Trace Event Information              \n");
+	fprintf(out, "=================================================\n");
+	fprintf(out, "  Total records                     : %10d\n", stats->nr_entries);
+	fprintf(out, "  Locked Load/Store Operations      : %10d\n", stats->locks);
+	fprintf(out, "  Load Operations                   : %10d\n", stats->load);
+	fprintf(out, "  Loads - uncacheable               : %10d\n", stats->ld_uncache);
+	fprintf(out, "  Loads - IO                        : %10d\n", stats->ld_io);
+	fprintf(out, "  Loads - Miss                      : %10d\n", stats->ld_miss);
+	fprintf(out, "  Loads - no mapping                : %10d\n", stats->ld_noadrs);
+	fprintf(out, "  Load Fill Buffer Hit              : %10d\n", stats->ld_fbhit);
+	fprintf(out, "  Load L1D hit                      : %10d\n", stats->ld_l1hit);
+	fprintf(out, "  Load L2D hit                      : %10d\n", stats->ld_l2hit);
+	fprintf(out, "  Load LLC hit                      : %10d\n", stats->ld_llchit + stats->lcl_hitm);
+	fprintf(out, "  Load Local HITM                   : %10d\n", stats->lcl_hitm);
+	fprintf(out, "  Load Remote HITM                  : %10d\n", stats->rmt_hitm);
+	fprintf(out, "  Load Remote HIT                   : %10d\n", stats->rmt_hit);
+	fprintf(out, "  Load Local DRAM                   : %10d\n", stats->lcl_dram);
+	fprintf(out, "  Load Remote DRAM                  : %10d\n", stats->rmt_dram);
+	fprintf(out, "  Load MESI State Exclusive         : %10d\n", stats->ld_excl);
+	fprintf(out, "  Load MESI State Shared            : %10d\n", stats->ld_shared);
+	fprintf(out, "  Load LLC Misses                   : %10d\n", llc_misses);
+	fprintf(out, "  LLC Misses to Local DRAM          : %10.1f%%\n", ((double)stats->lcl_dram/(double)llc_misses) * 100.);
+	fprintf(out, "  LLC Misses to Remote DRAM         : %10.1f%%\n", ((double)stats->rmt_dram/(double)llc_misses) * 100.);
+	fprintf(out, "  LLC Misses to Remote cache (HIT)  : %10.1f%%\n", ((double)stats->rmt_hit /(double)llc_misses) * 100.);
+	fprintf(out, "  LLC Misses to Remote cache (HITM) : %10.1f%%\n", ((double)stats->rmt_hitm/(double)llc_misses) * 100.);
+	fprintf(out, "  Store Operations                  : %10d\n", stats->store);
+	fprintf(out, "  Store - uncacheable               : %10d\n", stats->st_uncache);
+	fprintf(out, "  Store - no mapping                : %10d\n", stats->st_noadrs);
+	fprintf(out, "  Store L1D Hit                     : %10d\n", stats->st_l1hit);
+	fprintf(out, "  Store L1D Miss                    : %10d\n", stats->st_l1miss);
+	fprintf(out, "  No Page Map Rejects               : %10d\n", stats->nomap);
+	fprintf(out, "  Unable to parse data source       : %10d\n", stats->noparse);
+}
+
 static void print_cacheline(struct c2c_hists *c2c_hists,
 			    struct hist_entry *he_cl,
 			    struct perf_hpp_list *hpp_list,
@@ -1794,6 +1840,11 @@ static void perf_c2c__hists_fprintf(FILE *out)
 {
 	setup_pager();
 
+	print_c2c__display_stats(out);
+
+	if (c2c.stats_only)
+		return;
+
 	fprintf(out, "\n");
 	fprintf(out, "=================================================\n");
 	fprintf(out, "           Shared Data Cache Line Table          \n");
@@ -2005,6 +2056,8 @@ static int perf_c2c__report(int argc, const char **argv)
 #ifdef HAVE_SLANG_SUPPORT
 	OPT_BOOLEAN(0, "stdio", &c2c.use_stdio, "Use the stdio interface"),
 #endif
+	OPT_BOOLEAN(0, "stats", &c2c.stats_only,
+		    "Use the stdio interface"),
 	OPT_END()
 	};
 	int err = 0;
@@ -2014,6 +2067,9 @@ static int perf_c2c__report(int argc, const char **argv)
 	if (argc)
 		usage_with_options(report_c2c_usage, c2c_options);
 
+	if (c2c.stats_only)
+		c2c.use_stdio = true;
+
 	if (c2c.use_stdio)
 		use_browser = 0;
 	else