[PATCH v1 04/11] perf mem: Add statistics for peer snooping

From: Leo Yan <leo.yan@linaro.org>
To: Arnaldo Carvalho de Melo <acme@kernel.org>,
	Peter Zijlstra <peterz@infradead.org>,
	Ingo Molnar <mingo@redhat.com>,
	Mark Rutland <mark.rutland@arm.com>,
	Alexander Shishkin <alexander.shishkin@linux.intel.com>,
	Jiri Olsa <jolsa@kernel.org>, Namhyung Kim <namhyung@kernel.org>,
	Ian Rogers <irogers@google.com>, Alyssa Ross <hi@alyssa.is>,
	Like Xu <likexu@tencent.com>, Kajol Jain <kjain@linux.ibm.com>,
	Li Huafei <lihuafei1@huawei.com>, Ali Saidi <alisaidi@amazon.com>,
	German Gomez <german.gomez@arm.com>,
	James Clark <james.clark@arm.com>,
	linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org
Cc: Leo Yan <leo.yan@linaro.org>
Subject: [PATCH v1 04/11] perf mem: Add statistics for peer snooping
Date: Wed, 27 Apr 2022 23:50:06 +0800	[thread overview]
Message-ID: <20220427155013.1833222-5-leo.yan@linaro.org> (raw)
In-Reply-To: <20220427155013.1833222-1-leo.yan@linaro.org>

Since we have added the flag PERF_MEM_SNOOPX_PEER to support cache
snooping from peer core or cluster, this patch is to add statistics for
this new flag.

Signed-off-by: Leo Yan <leo.yan@linaro.org>
Tested-by: Ali Saidi <alisaidi@amazon.com>
---
 tools/perf/util/mem-events.c | 11 ++++++++++-
 tools/perf/util/mem-events.h |  1 +
 2 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/tools/perf/util/mem-events.c b/tools/perf/util/mem-events.c
index bfbac365e1e4..2086f067359b 100644
--- a/tools/perf/util/mem-events.c
+++ b/tools/perf/util/mem-events.c
@@ -525,6 +525,7 @@ int c2c_decode_stats(struct c2c_stats *stats, struct mem_info *mi)
 	u64 op     = data_src->mem_op;
 	u64 lvl    = data_src->mem_lvl;
 	u64 snoop  = data_src->mem_snoop;
+	u64 snoopx = data_src->mem_snoopx;
 	u64 lock   = data_src->mem_lock;
 	u64 blk    = data_src->mem_blk;
 	u64 lvl_num = data_src->mem_lvl_num;
@@ -568,10 +569,17 @@ do {				\
 			if (lvl & P(LVL, IO))  stats->ld_io++;
 			if (lvl & P(LVL, LFB)) stats->ld_fbhit++;
 			if (lvl & P(LVL, L1 )) stats->ld_l1hit++;
-			if (lvl & P(LVL, L2 )) stats->ld_l2hit++;
+			if (lvl & P(LVL, L2)) {
+				if (snoopx & P(SNOOPX, PEER))
+					stats->ld_peer++;
+				else
+					stats->ld_l2hit++;
+			}
 			if (lvl & P(LVL, L3 )) {
 				if (snoop & P(SNOOP, HITM))
 					HITM_INC(lcl_hitm);
+				else if (snoopx & P(SNOOPX, PEER))
+					stats->ld_peer++;
 				else
 					stats->ld_llchit++;
 			}
@@ -662,6 +670,7 @@ void c2c_add_stats(struct c2c_stats *stats, struct c2c_stats *add)
 	stats->ld_l1hit		+= add->ld_l1hit;
 	stats->ld_l2hit		+= add->ld_l2hit;
 	stats->ld_llchit	+= add->ld_llchit;
+	stats->ld_peer		+= add->ld_peer;
 	stats->lcl_hitm		+= add->lcl_hitm;
 	stats->rmt_hitm		+= add->rmt_hitm;
 	stats->tot_hitm		+= add->tot_hitm;
diff --git a/tools/perf/util/mem-events.h b/tools/perf/util/mem-events.h
index e0e8057c52e8..7b6c74e74354 100644
--- a/tools/perf/util/mem-events.h
+++ b/tools/perf/util/mem-events.h
@@ -75,6 +75,7 @@ struct c2c_stats {
 	u32	ld_l1hit;            /* count of loads that hit L1D */
 	u32	ld_l2hit;            /* count of loads that hit L2D */
 	u32	ld_llchit;           /* count of loads that hit LLC */
+	u32	ld_peer;             /* count of loads that hit peer core or cluster cache */
 	u32	lcl_hitm;            /* count of loads with local HITM  */
 	u32	rmt_hitm;            /* count of loads with remote HITM */
 	u32	tot_hitm;            /* count of loads with local and remote HITM */
-- 
2.25.1

