linux-kernel - [PATCH 2/6] tools/perf/json: Add cache metrics for s390 z16

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Date:   Mon, 13 Mar 2023 09:01:57 +0100
From:   Thomas Richter <tmricht@...ux.ibm.com>
To:     linux-kernel@...r.kernel.org, linux-perf-users@...r.kernel.org,
        acme@...nel.org, sumanthk@...ux.ibm.com
Cc:     svens@...ux.ibm.com, gor@...ux.ibm.com, hca@...ux.ibm.com,
        Thomas Richter <tmricht@...ux.ibm.com>
Subject: [PATCH 2/6] tools/perf/json: Add cache metrics for s390 z16

Add metrics for s390 z16
- Percentage sourced from Level 2 cache
- Percentage sourced from Level 3 on same chip cache
- Percentage sourced from Level 4 Local cache on same book
- Percentage sourced from Level 4 Remote cache on different book
- Percentage sourced from memory

For details about the formulas see this documentation:
https://www.ibm.com/support/pages/system/files/inline-files/CPU%20MF%20Formulas%20including%20z16%20-%20May%202022_1.pdf

Outpuf after:
 # ./perf stat -M l4rp -- dd if=/dev/zero of=/dev/null bs=10M count=10K
 .... dd output deleted

 Performance counter stats for 'dd if=/dev/zero of=/dev/null bs=10M count=10K':

                 0      IDCW_OFF_DRAWER_CHIP_HIT         #     0.00 l4rp
           431,866      L1I_DIR_WRITES
             2,395      IDCW_OFF_DRAWER_IV
                 0      ICW_OFF_DRAWER
                 0      IDCW_OFF_DRAWER_DRAWER_HIT
             1,437      DCW_OFF_DRAWER
       425,960,793      L1D_DIR_WRITES

      12.165030699 seconds time elapsed

       0.001037000 seconds user
      12.162140000 seconds sys

 #

Signed-off-by: Thomas Richter <tmricht@...ux.ibm.com>
Acked-By: Sumanth Korikkar <sumanthk@...ux.ibm.com>
---
 .../arch/s390/cf_z16/transaction.json         | 25 +++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/tools/perf/pmu-events/arch/s390/cf_z16/transaction.json b/tools/perf/pmu-events/arch/s390/cf_z16/transaction.json
index 86bf83b4504e..dde0735a7d22 100644
--- a/tools/perf/pmu-events/arch/s390/cf_z16/transaction.json
+++ b/tools/perf/pmu-events/arch/s390/cf_z16/transaction.json
@@ -18,5 +18,30 @@
     "BriefDescription": "Level One Miss per 100 Instructions",
     "MetricName": "l1mp",
     "MetricExpr": "((L1I_DIR_WRITES + L1D_DIR_WRITES) / INSTRUCTIONS) * 100"
+  },
+  {
+    "BriefDescription": "Percentage sourced from Level 2 cache",
+    "MetricName": "l2p",
+    "MetricExpr": "((DCW_REQ + DCW_REQ_IV + ICW_REQ + ICW_REQ_IV) / (L1I_DIR_WRITES + L1D_DIR_WRITES)) * 100"
+  },
+  {
+    "BriefDescription": "Percentage sourced from Level 3 on same chip cache",
+    "MetricName": "l3p",
+    "MetricExpr": "((DCW_REQ_CHIP_HIT + DCW_ON_CHIP + DCW_ON_CHIP_IV + DCW_ON_CHIP_CHIP_HIT + ICW_REQ_CHIP_HIT + ICW_ON_CHIP + ICW_ON_CHIP_IV + ICW_ON_CHIP_CHIP_HIT) / (L1I_DIR_WRITES + L1D_DIR_WRITES)) * 100"
+  },
+  {
+    "BriefDescription": "Percentage sourced from Level 4 Local cache on same book",
+    "MetricName": "l4lp",
+    "MetricExpr": "((DCW_REQ_DRAWER_HIT + DCW_ON_CHIP_DRAWER_HIT + DCW_ON_MODULE + DCW_ON_DRAWER + IDCW_ON_MODULE_IV + IDCW_ON_MODULE_CHIP_HIT + IDCW_ON_MODULE_DRAWER_HIT + IDCW_ON_DRAWER_IV + IDCW_ON_DRAWER_CHIP_HIT + IDCW_ON_DRAWER_DRAWER_HIT + ICW_REQ_DRAWER_HIT + ICW_ON_CHIP_DRAWER_HIT + ICW_ON_MODULE + ICW_ON_DRAWER) / (L1I_DIR_WRITES + L1D_DIR_WRITES)) * 100"
+  },
+  {
+    "BriefDescription": "Percentage sourced from Level 4 Remote cache on different book",
+    "MetricName": "l4rp",
+    "MetricExpr": "((DCW_OFF_DRAWER + IDCW_OFF_DRAWER_IV + IDCW_OFF_DRAWER_CHIP_HIT + IDCW_OFF_DRAWER_DRAWER_HIT + ICW_OFF_DRAWER) / (L1I_DIR_WRITES + L1D_DIR_WRITES)) * 100"
+  },
+  {
+    "BriefDescription": "Percentage sourced from memory",
+    "MetricName": "memp",
+    "MetricExpr": "((DCW_ON_CHIP_MEMORY + DCW_ON_MODULE_MEMORY + DCW_ON_DRAWER_MEMORY + DCW_OFF_DRAWER_MEMORY + ICW_ON_CHIP_MEMORY + ICW_ON_MODULE_MEMORY + ICW_ON_DRAWER_MEMORY + ICW_OFF_DRAWER_MEMORY) / (L1I_DIR_WRITES + L1D_DIR_WRITES)) * 100"
   }
 ]
-- 
2.39.1