From 2193701dbf7f8dfe08054df4fc880f0d18081632 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Thomas=20R=C3=B6hl?= <Thomas.Roehl@googlemail.com>
Date: Wed, 21 Aug 2019 14:48:45 +0200
Subject: [PATCH] Python version of bench.pl

---
 MainMemory/bench.py | 73 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 73 insertions(+)
 create mode 100755 MainMemory/bench.py

diff --git a/MainMemory/bench.py b/MainMemory/bench.py
new file mode 100755
index 0000000..f8a7711
--- /dev/null
+++ b/MainMemory/bench.py
@@ -0,0 +1,73 @@
+#!/usr/bin/env python3
+
+# =======================================================================================
+#
+#      Author:   Thomas Gruber (tg), thomas.gruber@googlemail.com
+#      Copyright (c) 2019 RRZE, University Erlangen-Nuremberg
+#
+#      Permission is hereby granted, free of charge, to any person obtaining a copy
+#      of this software and associated documentation files (the "Software"), to deal
+#      in the Software without restriction, including without limitation the rights
+#      to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+#      copies of the Software, and to permit persons to whom the Software is
+#      furnished to do so, subject to the following conditions:
+#
+#      The above copyright notice and this permission notice shall be included in all
+#      copies or substantial portions of the Software.
+#
+#      THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+#      IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+#      FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+#      AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+#      LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+#      OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+#      SOFTWARE.
+#
+# =======================================================================================
+
+import sys, subprocess, re
+
+default_regex = "^(\w+):\s+([\d\.]+)"
+default_smt = 2
+
+if len(sys.argv) < 4 or len(sys.argv) > 5:
+    print("{} <command> <minthreads>-<maxthreads> <repeats> (<smt>)".format(sys.argv[0]))
+    print("Default <smt> value is {}".format(default_smt))
+    sys.exit(1)
+
+cmd = str(sys.argv[1])
+minthreads = maxthreads = 0
+try:
+    minthreads, maxthreads = sys.argv[2].split("-")
+    minthreads = int(minthreads)
+    maxthreads = int(maxthreads)
+    if (minthreads == 0 or minthreads > maxthreads):
+        print("Cannot use threads range values: {} {}".format(minthreads, maxthreads))
+        sys.exit(1)
+except:
+    print("<minthreads>-<maxthreads> option not readable: {}".format(sys.argv[2]))
+    sys.exit(1)
+repeats = int(sys.argv[3])
+smt = int(sys.argv[4]) if len(sys.argv) == 5 else default_smt
+
+maximum = bestthreads = 0
+bestkernel = "None"
+for numthreads in range(int(minthreads), int(maxthreads)+1):
+    runcmd = "likwid-pin -c E:S0:{}:1:{} {}".format(numthreads, smt, cmd)
+    for rep in range(repeats):
+        p = subprocess.Popen(runcmd, stdout=subprocess.PIPE,
+                                     stderr=subprocess.STDOUT,
+                                     shell=True)
+        p.wait()
+        if p.returncode == 0:
+            lines = [ l for l in p.stdout.read().decode('utf-8').split("\n") ]
+            for l in lines:
+                m = re.search(default_regex, l)
+                if m and maximum < float(m.group(2)):
+                    maximum = float(m.group(2))
+                    bestthreads = numthreads
+                    bestkernel = m.group(1)
+        else:
+            print("Execution failed: {}".format(runcmd))
+
+print("{} was best using {} threads: {}".format(bestkernel, bestthreads, maximum))