linux-kernel - [tip:perf/core] perf c2c report: Add llc load miss dimension key

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Message-ID: <tip-wojujik7zzen770mxn295mxa@git.kernel.org>
Date:   Sat, 22 Oct 2016 01:40:48 -0700
From:   tip-bot for Jiri Olsa <tipbot@...or.com>
To:     linux-tip-commits@...r.kernel.org
Cc:     tglx@...utronix.de, a.p.zijlstra@...llo.nl,
        linux-kernel@...r.kernel.org, jolsa@...nel.org, acme@...hat.com,
        namhyung@...nel.org, andi@...stfloor.org, hpa@...or.com,
        dsahern@...il.com, jmario@...hat.com, dzickus@...hat.com,
        mingo@...nel.org
Subject: [tip:perf/core] perf c2c report: Add llc load miss dimension key

Commit-ID:  04402d205a40d38d1ebf4b48fb369bba39d4e05b
Gitweb:     http://git.kernel.org/tip/04402d205a40d38d1ebf4b48fb369bba39d4e05b
Author:     Jiri Olsa <jolsa@...nel.org>
AuthorDate: Thu, 19 May 2016 10:10:51 +0200
Committer:  Arnaldo Carvalho de Melo <acme@...hat.com>
CommitDate: Wed, 19 Oct 2016 13:18:31 -0300

perf c2c report: Add llc load miss dimension key

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

  ld_llcmiss

It displays bare number of LLC misses for cacheline.

Signed-off-by: Jiri Olsa <jolsa@...nel.org>
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-wojujik7zzen770mxn295mxa@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
 tools/perf/builtin-c2c.c | 47 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 47 insertions(+)

diff --git a/tools/perf/builtin-c2c.c b/tools/perf/builtin-c2c.c
index 6b60183..f525384 100644
--- a/tools/perf/builtin-c2c.c
+++ b/tools/perf/builtin-c2c.c
@@ -421,6 +421,44 @@ STAT_FN(ld_l2hit)
 STAT_FN(ld_llchit)
 STAT_FN(rmt_hit)
 
+static uint64_t llc_miss(struct c2c_stats *stats)
+{
+	uint64_t llcmiss;
+
+	llcmiss = stats->lcl_dram +
+		  stats->rmt_dram +
+		  stats->rmt_hitm +
+		  stats->rmt_hit;
+
+	return llcmiss;
+}
+
+static int
+ld_llcmiss_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);
+
+	c2c_he = container_of(he, struct c2c_hist_entry, he);
+
+	return scnprintf(hpp->buf, hpp->size, "%*lu", width,
+			 llc_miss(&c2c_he->stats));
+}
+
+static int64_t
+ld_llcmiss_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;
+
+	c2c_left  = container_of(left, struct c2c_hist_entry, he);
+	c2c_right = container_of(right, struct c2c_hist_entry, he);
+
+	return llc_miss(&c2c_left->stats) - llc_miss(&c2c_right->stats);
+}
+
 #define HEADER_LOW(__h)			\
 	{				\
 		.line[1] = {		\
@@ -600,6 +638,14 @@ static struct c2c_dimension dim_ld_rmthit = {
 	.width		= 8,
 };
 
+static struct c2c_dimension dim_ld_llcmiss = {
+	.header		= HEADER_BOTH("LLC", "Ld Miss"),
+	.name		= "ld_llcmiss",
+	.cmp		= ld_llcmiss_cmp,
+	.entry		= ld_llcmiss_entry,
+	.width		= 7,
+};
+
 static struct c2c_dimension *dimensions[] = {
 	&dim_dcacheline,
 	&dim_offset,
@@ -619,6 +665,7 @@ static struct c2c_dimension *dimensions[] = {
 	&dim_ld_l2hit,
 	&dim_ld_llchit,
 	&dim_ld_rmthit,
+	&dim_ld_llcmiss,
 	NULL,
 };