smptests/smplock01: Test TAS and TTAS locks

Cache align locks in the context.

1 files changed, 58 insertions, 0 deletions

diff --git a/testsuites/smptests/smplock01/smplock01fair.py b/testsuites/smptests/smplock01/smplock01fair.py
new file mode 100755
index 0000000000..23f85db23d
--- /dev/null
+++ b/testsuites/smptests/smplock01/smplock01fair.py
@@ -0,0 +1,58 @@
+#!/usr/bin/env python
+
+#
+# Copyright (c) 2016 embedded brains GmbH.  All rights reserved.
+#
+# The license and distribution terms for this file may be
+# found in the file LICENSE in this distribution or at
+# http://www.rtems.org/license/LICENSE.
+#
+
+import re
+import libxml2
+import math
+import statistics
+from libxml2 import xmlNode
+import matplotlib.pyplot as plt
+data = open('smplock01.scn').read()
+data = re.sub(r'\*\*\*.*\*\*\*', '', data)
+doc = libxml2.parseDoc(data)
+ctx = doc.xpathNewContext()
+
+plt.title('SMP Lock Fairness')
+plt.xlabel('Active Workers')
+plt.ylabel('Normed Coefficient of Variation')
+
+i = 1
+ticket = []
+mcs = []
+tas = []
+ttas = []
+
+def m(n):
+	return int(xmlNode.getContent(n))
+
+def normedCoefficientOfVariation(name, i):
+	y = map(m, ctx.xpathEval('/SMPLock01/' + name + '[@activeWorker=' + str(i) + ']/LocalCounter'))
+	if len(y) == 0:
+		raise
+	return (statistics.stdev(y) / statistics.mean(y)) / math.sqrt(len(y) - 1)
+
+try:
+	while True:
+		i = i + 1
+		ticket.append(normedCoefficientOfVariation('GlobalTicketLockWithLocalCounter', i))
+		mcs.append(normedCoefficientOfVariation('GlobalMCSLockWithLocalCounter', i))
+		tas.append(normedCoefficientOfVariation('GlobalTASLockWithLocalCounter', i))
+		ttas.append(normedCoefficientOfVariation('GlobalTTASLockWithLocalCounter', i))
+except:
+	pass
+
+x = range(1, len(ticket) + 1)
+plt.yscale('log')
+plt.plot(x, ticket, label = 'Ticket Lock', marker = 'o')
+plt.plot(x, mcs, label = 'MCS Lock', marker = 'o')
+plt.plot(x, tas, label = 'TAS Lock', marker = 'o')
+plt.plot(x, ttas, label = 'TTAS Lock', marker = 'o')
+plt.legend(loc = 'best')
+plt.show()