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#!/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
from libxml2 import xmlNode
import matplotlib.pyplot as plt
data = open('tmfine01.scn').read()
data = re.sub(r'\*\*\*.*\*\*\*', '', data)
doc = libxml2.parseDoc(data)
ctx = doc.xpathNewContext()
plt.title('Uncontested Mutex Performance')
plt.xlabel('Active Workers')
plt.ylabel('Operation Count')
def m(n):
return int(n.getContent())
def getCounterSums(variant):
w = 1
y = []
while True:
c = map(m, ctx.xpathEval('/TestTimeFine01/' + variant + '[@activeWorker="' + str(w) + '"]/Counter'))
if not c:
break
y.append(sum(c))
w = w + 1
return y
y = getCounterSums('ManySysLockMutex')
x = range(1, len(y) + 1)
plt.plot(x, y, label = 'Self-Contained Mutex', marker = 'o')
y = getCounterSums('ManyMutex')
plt.plot(x, y, label = 'Classic Mutex', marker = 'o')
plt.legend(loc = 'best')
plt.show()
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