linux-kernel - [PATCH v8 3/5] perf mem: Print snoop peer flag

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Message-ID: <20220504184850.24986-4-alisaidi@amazon.com>
Date:   Wed, 4 May 2022 18:48:48 +0000
From:   Ali Saidi <alisaidi@...zon.com>
To:     <linux-kernel@...r.kernel.org>, <linux-perf-users@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>, <german.gomez@....com>,
        <leo.yan@...aro.org>, <acme@...nel.org>
CC:     <alisaidi@...zon.com>, <benh@...nel.crashing.org>,
        <Nick.Forrington@....com>, <alexander.shishkin@...ux.intel.com>,
        <andrew.kilroy@....com>, <james.clark@....com>,
        <john.garry@...wei.com>, <jolsa@...nel.org>, <kjain@...ux.ibm.com>,
        <lihuafei1@...wei.com>, <mark.rutland@....com>,
        <mathieu.poirier@...aro.org>, <mingo@...hat.com>,
        <namhyung@...nel.org>, <peterz@...radead.org>, <will@...nel.org>
Subject: [PATCH v8 3/5] perf mem: Print snoop peer flag

From: Leo Yan <leo.yan@...aro.org>

Since PERF_MEM_SNOOPX_PEER flag is a new snoop type, print this flag if
it is set.

Before:
       memstress  3603 [020]   122.463754:          1            l1d-miss:       8688000842 |OP LOAD|LVL L3 or L3 hit|SNP N/A|TLB Walker hit|LCK No|BLK  N/A               aaaac17c3e88 [unknown] (/home/ubuntu/memstress)
       memstress  3603 [020]   122.463754:          1          l1d-access:       8688000842 |OP LOAD|LVL L3 or L3 hit|SNP N/A|TLB Walker hit|LCK No|BLK  N/A               aaaac17c3e88 [unknown] (/home/ubuntu/memstress)
       memstress  3603 [020]   122.463754:          1            llc-miss:       8688000842 |OP LOAD|LVL L3 or L3 hit|SNP N/A|TLB Walker hit|LCK No|BLK  N/A               aaaac17c3e88 [unknown] (/home/ubuntu/memstress)
       memstress  3603 [020]   122.463754:          1          llc-access:       8688000842 |OP LOAD|LVL L3 or L3 hit|SNP N/A|TLB Walker hit|LCK No|BLK  N/A               aaaac17c3e88 [unknown] (/home/ubuntu/memstress)
       memstress  3603 [020]   122.463754:          1          tlb-access:       8688000842 |OP LOAD|LVL L3 or L3 hit|SNP N/A|TLB Walker hit|LCK No|BLK  N/A               aaaac17c3e88 [unknown] (/home/ubuntu/memstress)
       memstress  3603 [020]   122.463754:          1              memory:       8688000842 |OP LOAD|LVL L3 or L3 hit|SNP N/A|TLB Walker hit|LCK No|BLK  N/A               aaaac17c3e88 [unknown] (/home/ubuntu/memstress)

After:

       memstress  3603 [020]   122.463754:          1            l1d-miss:       8688000842 |OP LOAD|LVL L3 or L3 hit|SNP Peer|TLB Walker hit|LCK No|BLK  N/A              aaaac17c3e88 [unknown] (/home/ubuntu/memstress)
       memstress  3603 [020]   122.463754:          1          l1d-access:       8688000842 |OP LOAD|LVL L3 or L3 hit|SNP Peer|TLB Walker hit|LCK No|BLK  N/A              aaaac17c3e88 [unknown] (/home/ubuntu/memstress)
       memstress  3603 [020]   122.463754:          1            llc-miss:       8688000842 |OP LOAD|LVL L3 or L3 hit|SNP Peer|TLB Walker hit|LCK No|BLK  N/A              aaaac17c3e88 [unknown] (/home/ubuntu/memstress)
       memstress  3603 [020]   122.463754:          1          llc-access:       8688000842 |OP LOAD|LVL L3 or L3 hit|SNP Peer|TLB Walker hit|LCK No|BLK  N/A              aaaac17c3e88 [unknown] (/home/ubuntu/memstress)
       memstress  3603 [020]   122.463754:          1          tlb-access:       8688000842 |OP LOAD|LVL L3 or L3 hit|SNP Peer|TLB Walker hit|LCK No|BLK  N/A              aaaac17c3e88 [unknown] (/home/ubuntu/memstress)
       memstress  3603 [020]   122.463754:          1              memory:       8688000842 |OP LOAD|LVL L3 or L3 hit|SNP Peer|TLB Walker hit|LCK No|BLK  N/A              aaaac17c3e88 [unknown] (/home/ubuntu/memstress)

Signed-off-by: Leo Yan <leo.yan@...aro.org>
Reviewed-by: Ali Saidi <alisaidi@...zon.com>
Tested-by: Ali Saidi <alisaidi@...zon.com>
---
 tools/perf/util/mem-events.c | 18 +++++++++++++++---
 1 file changed, 15 insertions(+), 3 deletions(-)

diff --git a/tools/perf/util/mem-events.c b/tools/perf/util/mem-events.c
index efaf263464b9..db5225caaabe 100644
--- a/tools/perf/util/mem-events.c
+++ b/tools/perf/util/mem-events.c
@@ -410,6 +410,11 @@ static const char * const snoop_access[] = {
 	"HitM",
 };
 
+static const char * const snoopx_access[] = {
+	"Fwd",
+	"Peer",
+};
+
 int perf_mem__snp_scnprintf(char *out, size_t sz, struct mem_info *mem_info)
 {
 	size_t i, l = 0;
@@ -430,13 +435,20 @@ int perf_mem__snp_scnprintf(char *out, size_t sz, struct mem_info *mem_info)
 		}
 		l += scnprintf(out + l, sz - l, snoop_access[i]);
 	}
-	if (mem_info &&
-	     (mem_info->data_src.mem_snoopx & PERF_MEM_SNOOPX_FWD)) {
+
+	m = 0;
+	if (mem_info)
+		m = mem_info->data_src.mem_snoopx;
+
+	for (i = 0; m && i < ARRAY_SIZE(snoopx_access); i++, m >>= 1) {
+		if (!(m & 0x1))
+			continue;
+
 		if (l) {
 			strcat(out, " or ");
 			l += 4;
 		}
-		l += scnprintf(out + l, sz - l, "Fwd");
+		l += scnprintf(out + l, sz - l, snoopx_access[i]);
 	}
 
 	if (*out == '\0')
-- 
2.32.0