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Date:   Thu, 20 Oct 2016 12:04:30 -0300
From:   Arnaldo Carvalho de Melo <acme@...nel.org>
To:     Ingo Molnar <mingo@...nel.org>
Cc:     linux-kernel@...r.kernel.org, Linux Weekly News <lwn@....net>,
        Jiri Olsa <jolsa@...nel.org>, Andi Kleen <andi@...stfloor.org>,
        David Ahern <dsahern@...il.com>,
        Don Zickus <dzickus@...hat.com>, Joe Mario <jmario@...hat.com>,
        Namhyung Kim <namhyung@...nel.org>,
        Peter Zijlstra <a.p.zijlstra@...llo.nl>,
        Arnaldo Carvalho de Melo <acme@...hat.com>
Subject: [PATCH 46/52] perf c2c report: Add cacheline index entry

From: Jiri Olsa <jolsa@...nel.org>

It's convenient to have an index for each cacheline to help discussions
about results over the phone.

Add new 'Index' and 'Num' fields in main and single cacheline tables.

$ perf c2c report
  =================================================
             Shared Data Cache Line Table
  =================================================
  #
  #                              Total      Lcl  ----- LLC Load Hitm -----
  # Index           Cacheline  records     Hitm    Total      Lcl      Rmt  ...
  # .....  ..................  .......  .......  .......  .......  .......
  #
        0  0xffff880036233b40        1   11.11%        1        1        0
        1  0xffff88009ccb2900        1   11.11%        1        1        0
        2  0xffff8800b5b3bc40        7   11.11%        1        1        0
  ...

  =================================================
        Shared Cache Line Distribution Pareto
  =================================================
  #
  #        ----- HITM -----  -- Store Refs --        Data address
  #   Num      Rmt      Lcl   L1 Hit  L1 Miss              Offset      Pid  ...
  # .....  .......  .......  .......  .......  ..................  .......
  #
    -------------------------------------------------------------
        0        0        1        0        0  0xffff880036233b40
    -------------------------------------------------------------
             0.00%  100.00%    0.00%    0.00%                0x30        0

    -------------------------------------------------------------
        1        0        1        0        0  0xffff88009ccb2900
    -------------------------------------------------------------
             0.00%  100.00%    0.00%    0.00%                0x28      549
  ...

Signed-off-by: Jiri Olsa <jolsa@...nel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@...hat.com>
Cc: Andi Kleen <andi@...stfloor.org>
Cc: David Ahern <dsahern@...il.com>
Cc: Don Zickus <dzickus@...hat.com>
Cc: Joe Mario <jmario@...hat.com>
Cc: Namhyung Kim <namhyung@...nel.org>
Cc: Peter Zijlstra <a.p.zijlstra@...llo.nl>
Link: http://lkml.kernel.org/n/tip-4dhfagaz57tvrfjbg8nd2h4u@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
 tools/perf/builtin-c2c.c | 64 +++++++++++++++++++++++++++++++++++++++++++++---
 1 file changed, 61 insertions(+), 3 deletions(-)

diff --git a/tools/perf/builtin-c2c.c b/tools/perf/builtin-c2c.c
index 473dae1baed8..430360e618b0 100644
--- a/tools/perf/builtin-c2c.c
+++ b/tools/perf/builtin-c2c.c
@@ -36,6 +36,7 @@ struct c2c_hist_entry {
 	struct c2c_stats	 stats;
 	unsigned long		*cpuset;
 	struct c2c_stats	*node_stats;
+	unsigned int		 cacheline_idx;
 
 	struct compute_stats	 cstats;
 
@@ -1088,6 +1089,29 @@ cpucnt_entry(struct perf_hpp_fmt *fmt __maybe_unused, struct perf_hpp *hpp,
 	return scnprintf(hpp->buf, hpp->size, "%*s", width, buf);
 }
 
+static int
+cl_idx_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, "%u", c2c_he->cacheline_idx);
+	return scnprintf(hpp->buf, hpp->size, "%*s", width, buf);
+}
+
+static int
+cl_idx_empty_entry(struct perf_hpp_fmt *fmt __maybe_unused, struct perf_hpp *hpp,
+		   struct hist_entry *he)
+{
+	int width = c2c_width(fmt, hpp, he->hists);
+
+	return scnprintf(hpp->buf, hpp->size, "%*s", width, "");
+}
+
 #define HEADER_LOW(__h)			\
 	{				\
 		.line[1] = {		\
@@ -1433,6 +1457,30 @@ static struct c2c_dimension dim_srcline = {
 	.se		= &sort_srcline,
 };
 
+static struct c2c_dimension dim_dcacheline_idx = {
+	.header		= HEADER_LOW("Index"),
+	.name		= "cl_idx",
+	.cmp		= empty_cmp,
+	.entry		= cl_idx_entry,
+	.width		= 5,
+};
+
+static struct c2c_dimension dim_dcacheline_num = {
+	.header		= HEADER_LOW("Num"),
+	.name		= "cl_num",
+	.cmp		= empty_cmp,
+	.entry		= cl_idx_entry,
+	.width		= 5,
+};
+
+static struct c2c_dimension dim_dcacheline_num_empty = {
+	.header		= HEADER_LOW("Num"),
+	.name		= "cl_num_empty",
+	.cmp		= empty_cmp,
+	.entry		= cl_idx_empty_entry,
+	.width		= 5,
+};
+
 static struct c2c_dimension *dimensions[] = {
 	&dim_dcacheline,
 	&dim_offset,
@@ -1472,6 +1520,9 @@ static struct c2c_dimension *dimensions[] = {
 	&dim_mean_load,
 	&dim_cpucnt,
 	&dim_srcline,
+	&dim_dcacheline_idx,
+	&dim_dcacheline_num,
+	&dim_dcacheline_num_empty,
 	NULL,
 };
 
@@ -1761,6 +1812,10 @@ static int resort_cl_cb(struct hist_entry *he)
 	calc_width(he);
 
 	if (display && c2c_hists) {
+		static unsigned int idx;
+
+		c2c_he->cacheline_idx = idx++;
+
 		c2c_hists__reinit(c2c_hists, c2c.cl_output, c2c.cl_resort);
 
 		hists__collapse_resort(&c2c_hists->hists, NULL);
@@ -1948,10 +2003,10 @@ static void print_cacheline(struct c2c_hists *c2c_hists,
 		fprintf(out, "\n");
 	}
 
-	fprintf(out, "  ------------------------------------------------------\n");
+	fprintf(out, "  -------------------------------------------------------------\n");
 	__hist_entry__snprintf(he_cl, &hpp, hpp_list);
 	fprintf(out, "%s\n", bf);
-	fprintf(out, "  ------------------------------------------------------\n");
+	fprintf(out, "  -------------------------------------------------------------\n");
 
 	hists__fprintf(&c2c_hists->hists, false, 0, 0, 0, out, true);
 }
@@ -1964,6 +2019,7 @@ static void print_pareto(FILE *out)
 
 	perf_hpp_list__init(&hpp_list);
 	ret = hpp_list__parse(&hpp_list,
+				"cl_num,"
 				"cl_rmt_hitm,"
 				"cl_lcl_hitm,"
 				"cl_stores_l1hit,"
@@ -2321,7 +2377,8 @@ static int build_cl_output(char *cl_sort)
 	}
 
 	if (asprintf(&c2c.cl_output,
-		"%s%s%s%s%s%s%s%s%s",
+		"%s%s%s%s%s%s%s%s%s%s",
+		c2c.use_stdio ? "cl_num_empty," : "",
 		"percent_rmt_hitm,"
 		"percent_lcl_hitm,"
 		"percent_stores_l1hit,"
@@ -2470,6 +2527,7 @@ static int perf_c2c__report(int argc, const char **argv)
 	}
 
 	c2c_hists__reinit(&c2c.hists,
+			"cl_idx,"
 			"dcacheline,"
 			"tot_recs,"
 			"percent_hitm,"
-- 
2.7.4

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