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#
# Copyright (c) 2014 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 libxml2
from libxml2 import xmlNode
import matplotlib.pyplot as plt
doc = libxml2.parseFile("tmcontext01.scn")
ctx = doc.xpathNewContext()
colors = ['k', 'r', 'b', 'g', 'y', 'm']
def plot(y, color, label, first):
n=len(y)
x=range(0, n)
if first:
plt.plot(x, y, color=color, label=label)
else:
plt.plot(x, y, color=color)
plt.title("context switch timing test")
plt.xlabel('function nest level')
plt.ylabel('context switch time [ns]')
c = 0
for e in ["normal", "dirty"]:
first = True
for i in ["Min", "Q1", "Q2", "Q3", "Max"]:
y=map(xmlNode.getContent, ctx.xpathEval("/Test/ContextSwitchTest[@environment='" + e + "' and not(@load)]/Sample/" + i))
plot(y, colors[c], e, first)
first = False
c = c + 1
load = 1
while load > 0:
first = True
for i in ["Min", "Q1", "Q2", "Q3", "Max"]:
y=map(xmlNode.getContent, ctx.xpathEval("/Test/ContextSwitchTest[@environment='dirty' and @load='" + str(load) + "']/Sample/" + i))
if len(y) > 0:
plot(y, colors[c], "load " + str(load), first)
first = False
else:
load = 0
if load > 0:
load = load + 1
c = c + 1
plt.legend()
plt.show()
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