[PATCH 20/52] perf c2c report: Add llc load miss dimension key

Arnaldo Carvalho de Melo
2016-10-20T15:07:37Z

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@kernel.org>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Don Zickus <dzickus@redhat.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-wojujik7zzen770mxn295mxa@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.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 6b601836b031..f525384dbbad 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,
};

--
2.7.4