added my Recipes

meta-st/meta-st-openstlinux/recipes-extended/stm32-ddr-tools/files/stm32_ddr_pmu.py

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+#!/usr/bin/python3
+
+import getopt
+import re
+import sys
+
+with open('/proc/device-tree/compatible', 'r') as compatible:
+    if 'stm32mp15' in compatible.read():
+        word_length  = 4    # Bytes
+    else:
+        word_length  = 2    # Bytes
+
+burst_length = 8    # Words
+
+def usage():
+    print("Usage:")
+    print("  python stm32_ddr_pmu.py [-d <ddr_freq>] -f <perf_file>")
+    print("    -d ddr_freq: DDR frequency in MHz (533 MHz by default)")
+    print("    -f perf_file: text file containing the output of")
+    print("        perf stat -e stm32_ddr_pmu/read_cnt/,stm32_ddr_pmu/time_cnt/,stm32_ddr_pmu/write_cnt/ -a -o <perf_file> <command>")
+    print("The script considers bursts of %s words with %s bytes per word." % (burst_length, word_length))
+    sys.exit(2)
+
+ddr_freq = 533
+perf_file = None
+dic = {}
+
+try:
+    opts, args = getopt.getopt(sys.argv[1:], "d:f:")
+except getopt.GetoptError:
+    print("Error: invalid option !")
+    usage()
+
+for opt,arg in opts:
+    if opt == '-d':
+        ddr_freq = int(arg)
+    elif opt == '-f':
+        perf_file = arg
+    else:
+        usage()
+
+if perf_file == None:
+    print("Error: no perf file !")
+    usage()
+
+with open(perf_file) as file:
+    lines = file.readlines()
+    for line in lines:
+        a = re.match(".* ([0-9]+).*stm32_ddr_pmu\/(.*)\/.*", line)
+        try:
+            dic[a.groups()[1]] = a.groups()[0]
+        except:
+            continue
+
+constant = word_length * burst_length * ddr_freq * 1000000 / int(dic['time_cnt']) / (1024 * 1024)
+read_bw = int(dic['read_cnt']) * constant
+write_bw = int(dic['write_cnt']) * constant
+
+print("R = %s MB/s, W = %s MB/s, R&W = %s MB/s (DDR @ %s MHz)" % (read_bw.__round__(),
+      write_bw.__round__(), (read_bw + write_bw).__round__(), ddr_freq))