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#!/usr/bin/env python
# StressSuite, a unittest testSuite designed for stressing software and
# catching memory leaks.
#
# Copyright (C) 2001 Christian Reis <kiko@async.com.br>
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Library General Public
# License as published by the Free Software Foundation; either
# version 2 of the License, or (at your option) any later version.
#
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# Library General Public License for more details.
#
# You should have received a copy of the GNU Library General Public
# License along with this library; if not, write to the Free
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
import unittest, os, string, sys, time
# Needs to have certain number of variables set externally. Okay, so
# this is ugly. Sue me. :)
RUNS = 1000
NUM_SAMPLES = 30
TESTS = []
DEBUG = 0
# A simple stat class that monitors a single process for growth
class SingleStressStats:
def __init__(self):
self.mypid = str(os.getpid())
self.size = self.get_size()
self.start_size = self.get_size()
self.leak = 0
self.startTime = time.time()
def get_size(self):
return self.get_vmsize(self.mypid)
def get_vmsize(self, pid):
sizeh = open('/proc/'+pid+'/status')
lines = sizeh.readlines()
sizeh.close()
for l in lines:
if l[0:6] == "VmSize":
return int(string.split(l)[1])
raise "/proc/#/status broken - not found"
def __str__(self):
self.update()
curr = self.get_size()
diff = curr - self.start_size
tdiff = time.time() - self.startTime
stats = "(%02.2fs)" % ( tdiff )
# if we leak more than half the times
if ( self.leak > NUM_SAMPLES * 0.5 ):
stats = stats + \
"\n *** Leak in process: %.2f Kbytes, %d bytes per invocation" % \
( diff, (diff*1024)/ (RUNS) )
return stats
def update(self):
curr = self.get_vmsize(self.mypid)
# do x-y for curr and self.sizes in parallel
diff = curr - self.size
self.sizes = curr
# Attention: leak is a counter because we want to catch
# reproducible leaks, and not just a single leak (which could be
# caused by python startup or one-time growth
if diff:
self.leak = self.leak+1
return self.leak
# A StressStats class that reads information from /proc for two processes, a
# client and a server.
class ClientServerStressStats:
def __init__(self):
self.mypid = str(os.getpid())
# get server pid from "pid" file.
self.serverpid = string.strip( open('pid').readline() )
self.sizes = self.get_size()
self.start_sizes = self.get_size()
# store leaks in client and server
self.leak = [ 0, 0 ]
self.startTime = time.time()
def get_size(self):
return [ self.get_vmsize(self.serverpid),
self.get_vmsize(self.mypid) ]
# Reach for the crack pipe!
def __str__(self):
self.update()
curr = self.get_size()
diff = map(lambda x,y: x - y, curr, self.start_sizes)
tdiff = time.time() - self.startTime
stats = "(%02.2fs)" % ( tdiff )
if ( self.leak[0] > NUM_SAMPLES / 2 ):
stats = stats + \
"\n *** Leak in server: %.2f Kbytes, %d bytes per invocation" % \
( diff[0], (diff[0]*1024)/ (RUNS) )
if ( self.leak[1] > NUM_SAMPLES / 2 ):
stats = stats + \
"\n *** Leak in client: %.2f KBytes, %d bytes per invocation" % \
( diff[1], (diff[1]*1024)/ (RUNS) )
return stats
def get_vmsize(self, pid):
sizeh = open('/proc/'+pid+'/status')
lines = sizeh.readlines()
sizeh.close()
for l in lines:
if l[0:6] == "VmSize":
return int(string.split(l)[1])
raise "/proc/#/status broken - not found"
def update(self):
curr = [ self.get_vmsize(self.serverpid),
self.get_vmsize(self.mypid) ]
# do x-y for curr and self.sizes in parallel
diff = map(lambda x,y: x - y, curr, self.sizes)
self.sizes = curr
# Attention: leak is a counter because we want to catch
# reproducible leaks, and not just a single leak (which could be
# caused by python startup or one-time growth
if diff[0]:
self.leak[0] = self.leak[0]+1
if diff[1]:
self.leak[1] = self.leak[1]+1
return self.leak[0] + self.leak[1]
#
# Override this if you don't want the default C/S test.
#
STATS = ClientServerStressStats
#
# The suite itself.
#
class StressSuite(unittest.TestSuite):
def __init__(self, tests=() ):
unittest.TestSuite.__init__(self, tests)
# This is to get the tests running in the right order
# Names are of the type X## where X is any letter.
def _cmp_names(self,x,y):
nx = string.split(str(x),"_")[1]
ny = string.split(str(y),"_")[1]
# Don't try and reorder things with broken names
try:
int(nx[1:])
except ValueError:
return 0
if int(nx[1:]) > int(ny[1:]):
return 1
else:
return -1
def echo(self,str):
sys.stdout.write(str)
sys.stdout.flush()
def __call__(self, result):
SAMPLE_INTERVAL = int ( RUNS / NUM_SAMPLES )
self.echo("\n")
n = str("Test name")
self.echo(n)
for i in range(0,30 - len(n)):
self.echo(" ")
n = " Progress"
self.echo(n)
for i in range(0,NUM_SAMPLES + 3 - len(n)):
self.echo(" ")
self.echo(" Time")
self.echo("\n\n")
# get those tests in the right order
self._tests.sort(self._cmp_names)
for test in self._tests:
# filter our nostress tests
if str(test).find("nostress") != -1:
continue
# if TESTS exists, only run tests listed
if TESTS:
if string.split(str(test),"_")[1] not in TESTS:
continue
stats = STATS()
# No idea what this is - stolen from TestSuite
if result.shouldStop:
break
# Cut up name into something nice
fullname = string.split(str(test)," ")[0]
testname = string.split(fullname,"_",1)[1]
# truncate name and fix open progress bracket.
self.echo(testname[:28])
for i in range(0,30 - len(testname[:28])):
self.echo(" ")
# The testing loop
self.echo("[")
for i in range(0,RUNS):
if DEBUG: print i
test(result)
if not i % ( SAMPLE_INTERVAL ):
r = stats.update()
if r > NUM_SAMPLES * 0.75:
self.echo("O")
elif r > NUM_SAMPLES * 0.5:
self.echo("o")
elif r > NUM_SAMPLES * 0.25:
self.echo(".")
else:
self.echo("_")
self.echo("] "+str(stats)+"\n")
# Catch multiple errors and just use first one
if len(result.errors) > 0:
result.errors = [ result.errors[0], ]
if len(result.failures) > 0:
result.failures = [ result.failures[0], ]
return result
#
# Example run.
#
if __name__ == "__main__":
STATS = SingleStressStats
RUNS = 1000
class FooTest(unittest.TestCase):
hoard = []
def test_A0_nop(self):
pass
def test_A1_alloc(self):
self.hoard.append(open("/dev/zero").read(2048))
def test_A2_alloc_big(self):
self.hoard.append(open("/dev/zero").read(8192))
suites = unittest.makeSuite ( FooTest, suiteClass = StressSuite )
suite = unittest.TestSuite ( ( suites, ) )
runner = unittest.TextTestRunner( verbosity = 0)
runner.run(suite)
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