linux-kernel - [PATCH v1 3/8] perf c2c: Add dimensions for LLC load hit

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Date:   Thu, 15 Oct 2020 15:50:36 +0100
From:   Leo Yan <leo.yan@...aro.org>
To:     Arnaldo Carvalho de Melo <acme@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...hat.com>,
        Namhyung Kim <namhyung@...nel.org>,
        Kan Liang <kan.liang@...ux.intel.com>,
        Andi Kleen <ak@...ux.intel.com>,
        Ian Rogers <irogers@...gle.com>, Joe Mario <jmario@...hat.com>,
        David Ahern <dsahern@...il.com>,
        Don Zickus <dzickus@...hat.com>, Al Grant <Al.Grant@....com>,
        James Clark <james.clark@....com>, linux-kernel@...r.kernel.org
Cc:     Leo Yan <leo.yan@...aro.org>
Subject: [PATCH v1 3/8] perf c2c: Add dimensions for LLC load hit

Add dimensions for LLC load hit and its associated percentage
calculation, which is to be displayed in the single cache line output.

Signed-off-by: Leo Yan <leo.yan@...aro.org>
---
 tools/perf/builtin-c2c.c | 51 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 51 insertions(+)

diff --git a/tools/perf/builtin-c2c.c b/tools/perf/builtin-c2c.c
index 5fb77fcd3c9c..3f6271a779c4 100644
--- a/tools/perf/builtin-c2c.c
+++ b/tools/perf/builtin-c2c.c
@@ -947,6 +947,7 @@ static double percent_ ## __f(struct c2c_hist_entry *c2c_he)			\
 
 PERCENT_FN(rmt_hitm)
 PERCENT_FN(lcl_hitm)
+PERCENT_FN(ld_llchit)
 PERCENT_FN(st_l1hit)
 PERCENT_FN(st_l1miss)
 
@@ -1012,6 +1013,37 @@ percent_lcl_hitm_cmp(struct perf_hpp_fmt *fmt __maybe_unused,
 	return per_left - per_right;
 }
 
+static int
+percent_llc_hit_entry(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp,
+		       struct hist_entry *he)
+{
+	int width = c2c_width(fmt, hpp, he->hists);
+	double per = PERCENT(he, ld_llchit);
+	char buf[10];
+
+	return scnprintf(hpp->buf, hpp->size, "%*s", width, PERC_STR(buf, per));
+}
+
+static int
+percent_llc_hit_color(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp,
+		      struct hist_entry *he)
+{
+	return percent_color(fmt, hpp, he, percent_ld_llchit);
+}
+
+static int64_t
+percent_llc_hit_cmp(struct perf_hpp_fmt *fmt __maybe_unused,
+		    struct hist_entry *left, struct hist_entry *right)
+{
+	double per_left;
+	double per_right;
+
+	per_left  = PERCENT(left, ld_llchit);
+	per_right = PERCENT(right, ld_llchit);
+
+	return per_left - per_right;
+}
+
 static int
 percent_stores_l1hit_entry(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp,
 			   struct hist_entry *he)
@@ -1377,6 +1409,14 @@ static struct c2c_dimension dim_cl_rmt_hitm = {
 	.width		= 7,
 };
 
+static struct c2c_dimension dim_cl_llc_hit = {
+	.header		= HEADER_SPAN("--- LLC Load ---", "LclHit", 1),
+	.name		= "cl_llc_hit",
+	.cmp		= ld_llchit_cmp,
+	.entry		= ld_llchit_entry,
+	.width		= 7,
+};
+
 static struct c2c_dimension dim_cl_lcl_hitm = {
 	.header		= HEADER_SPAN_LOW("Lcl"),
 	.name		= "cl_lcl_hitm",
@@ -1530,6 +1570,15 @@ static struct c2c_dimension dim_percent_lcl_hitm = {
 	.width		= 7,
 };
 
+static struct c2c_dimension dim_percent_llc_hit = {
+	.header		= HEADER_SPAN("---- LLC LD ----", "LclHit", 1),
+	.name		= "percent_llc_hit",
+	.cmp		= percent_llc_hit_cmp,
+	.entry		= percent_llc_hit_entry,
+	.color		= percent_llc_hit_color,
+	.width		= 7,
+};
+
 static struct c2c_dimension dim_percent_stores_l1hit = {
 	.header		= HEADER_SPAN("-- Store Refs --", "L1 Hit", 1),
 	.name		= "percent_stores_l1hit",
@@ -1673,6 +1722,7 @@ static struct c2c_dimension *dimensions[] = {
 	&dim_tot_hitm,
 	&dim_lcl_hitm,
 	&dim_rmt_hitm,
+	&dim_cl_llc_hit,
 	&dim_cl_lcl_hitm,
 	&dim_cl_rmt_hitm,
 	&dim_tot_stores,
@@ -1692,6 +1742,7 @@ static struct c2c_dimension *dimensions[] = {
 	&dim_percent_llchit,
 	&dim_percent_rmt_hitm,
 	&dim_percent_lcl_hitm,
+	&dim_percent_llc_hit,
 	&dim_percent_stores_l1hit,
 	&dim_percent_stores_l1miss,
 	&dim_dram_lcl,
-- 
2.17.1