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Commit 7ef2efaa authored by Jiri Olsa's avatar Jiri Olsa Committed by Arnaldo Carvalho de Melo
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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: default avatarDick Fowles <rfowles@redhat.com>
Original-patch-by: default avatarDon Zickus <dzickus@redhat.com>
Signed-off-by: default avatarJiri Olsa <jolsa@kernel.org>
Tested-by: default avatarArnaldo 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: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent 74c63a25

tools/perf/builtin-c2c.c

+61 −1
Original line number Original line Diff line number Diff line
@@ -56,6 +56,10 @@ struct perf_c2c { 
	bool			 show_src;

	bool			 show_src;

	bool			 use_stdio;

	bool			 use_stdio;

	bool			 stats_only;

	bool			 stats_only;



	/* HITM shared clines stats */

	struct c2c_stats	hitm_stats;

	int			shared_clines;

};

};





static struct perf_c2c c2c;

static struct perf_c2c c2c;
@@ -1732,6 +1736,39 @@ static int setup_nodes(struct perf_session *session) 
	return 0;

	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)

static void print_c2c__display_stats(FILE *out)

{

{

	int llc_misses;

	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);

	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,

static void print_cacheline(struct c2c_hists *c2c_hists,

			    struct hist_entry *he_cl,

			    struct hist_entry *he_cl,

			    struct perf_hpp_list *hpp_list,

			    struct perf_hpp_list *hpp_list,
@@ -1841,6 +1898,8 @@ static void perf_c2c__hists_fprintf(FILE *out) 
	setup_pager();

	setup_pager();





	print_c2c__display_stats(out);

	print_c2c__display_stats(out);

	fprintf(out, "\n");

	print_shared_cacheline_info(out);





	if (c2c.stats_only)

	if (c2c.stats_only)

		return;

		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...");

	ui_progress__init(&prog, c2c.hists.hists.nr_entries, "Sorting...");





	hists__collapse_resort(&c2c.hists.hists, NULL);

	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();

	ui_progress__finish();