On Tue, Aug 2, 2011 at 11:50 AM, Lukas Doktor <ldoktor@xxxxxxxxxx> wrote:
> From: root <root@xxxxxxxxxxxxxxxxxxxxxxxxxx>
Ok Lukas, give me some time to go through this, I have started this
but will probably take a while to finish.
Cheers!
> cgroup.py:
> * structure for different cgroup subtests
> * contains basic "cgroup-memory" test
>
> cgroup_common.py:
> * library for cgroup handling (intended to be used from kvm test in the future)
> * universal smoke_test for every module
>
> cgroup_client.py:
> * application which is executed and controled using cgroups
> * contains smoke, memory, cpu and devices tests which were manually tested to break cgroup rules and will be used in the cgroup.py subtests
>
> Signed-off-by: Lukas Doktor <ldoktor@xxxxxxxxxx>
> ---
> client/tests/cgroup/cgroup.py | 236 ++++++++++++++++++++++++++++++++++
> client/tests/cgroup/cgroup_client.py | 116 +++++++++++++++++
> client/tests/cgroup/control | 12 ++
> 3 files changed, 364 insertions(+), 0 deletions(-)
> create mode 100755 client/tests/cgroup/cgroup.py
> create mode 100755 client/tests/cgroup/cgroup_client.py
> create mode 100644 client/tests/cgroup/control
>
> diff --git a/client/tests/cgroup/cgroup.py b/client/tests/cgroup/cgroup.py
> new file mode 100755
> index 0000000..d043d65
> --- /dev/null
> +++ b/client/tests/cgroup/cgroup.py
> @@ -0,0 +1,236 @@
> +from autotest_lib.client.bin import test
> +from autotest_lib.client.common_lib import error
> +import os, logging
> +import time
> +from cgroup_common import Cgroup as CG
> +from cgroup_common import CgroupModules
> +
> +class cgroup(test.test):
> + """
> + Tests the cgroup functionalities
> + """
> + version = 1
> + _client = ""
> + modules = CgroupModules()
> +
> +
> + def run_once(self):
> + """
> + Try to access different resources which are restricted by cgroup.
> + """
> + logging.info('Start')
> +
> + err = ""
> + # Run available tests
> + for i in ['memory']:
> + try:
> + if self.modules.get_pwd(i):
> + if (eval ("self.test_%s()" % i)):
> + err += "%s, " % i
> + else:
> + logging.error("CGROUP: Skipping test_%s, module not "
> + "available/mounted", i)
> + err += "%s, " % i
> + except Exception, inst:
> + logging.error("CGROUP: test_%s fatal failure: %s", i, inst)
> + err += "%s, " % i
> +
> + if err:
> + raise error.TestFail('CGROUP: Some subtests failed (%s)' % err[:-2])
> +
> +
> + def setup(self):
> + """
> + Setup
> + """
> + logging.info('Setup')
> +
> + self._client = os.path.join(self.bindir, "cgroup_client.py")
> +
> + _modules = ['cpuset', 'ns', 'cpu', 'cpuacct', 'memory', 'devices',
> + 'freezer', 'net_cls', 'blkio']
> + if (self.modules.init(_modules) <= 0):
> + raise error.TestFail('Can\'t mount any cgroup modules')
> +
> +
> + def cleanup(self):
> + """
> + Unmount all cgroups and remove directories
> + """
> + logging.info('Cleanup')
> + self.modules.cleanup()
> +
> +
> + #############################
> + # TESTS
> + #############################
> + def test_memory(self):
> + """
> + Memory test
> + """
> + # Preparation
> + logging.info("Entering 'test_memory'")
> + item = CG('memory', self._client)
> + if item.initialize(self.modules):
> + logging.error("test_memory: cgroup init failed")
> + return -1
> +
> + if item.smoke_test():
> + logging.error("test_memory: smoke_test failed")
> + return -1
> +
> + pwd = item.mk_cgroup()
> + if pwd == None:
> + logging.error("test_memory: Can't create cgroup")
> + return -1
> +
> + logging.debug("test_memory: Memory filling test")
> +
> + f = open('/proc/meminfo','r')
> + mem = f.readline()
> + while not mem.startswith("MemFree"):
> + mem = f.readline()
> + # Use only 1G or max of the free memory
> + mem = min(int(mem.split()[1])/1024, 1024)
> + mem = max(mem, 100) # at least 100M
> + if (item.get_property("memory.memsw.limit_in_bytes", supress=True)
> + != None):
> + memsw = True
> + # Clear swap
> + os.system("swapoff -a")
> + os.system("swapon -a")
> + f.seek(0)
> + swap = f.readline()
> + while not swap.startswith("SwapTotal"):
> + swap = f.readline()
> + swap = int(swap.split()[1])/1024
> + if swap < mem / 2:
> + logging.error("Not enough swap memory to test 'memsw'")
> + memsw = False
> + else:
> + # Doesn't support swap+memory limitation, disable swap
> + logging.info("'memsw' not supported")
> + os.system("swapoff -a")
> + memsw = False
> + logging.debug("test_memory: Initializition passed")
> +
> + ################################################
> + # Fill the memory without cgroup limitation
> + # Should pass
> + ################################################
> + ps = item.test("memfill %d" % mem)
> + ps.stdin.write('\n')
> + i = 0
> + while ps.poll() == None:
> + if i > 60:
> + break
> + i += 1
> + time.sleep(1)
> + if i > 60:
> + logging.error("test_memory: Memory filling failed (WO cgroup)")
> + ps.terminate()
> + return -1
> + if not ps.stdout.readlines()[-1].startswith("PASS"):
> + logging.error("test_memory: Unsuccessful memory filling "
> + "(WO cgroup)")
> + return -1
> + logging.debug("test_memory: Memfill WO cgroup passed")
> +
> + ################################################
> + # Fill the memory with 1/2 memory limit
> + # memsw: should swap out part of the process and pass
> + # WO memsw: should fail (SIGKILL)
> + ################################################
> + ps = item.test("memfill %d" % mem)
> + if item.set_cgroup(ps.pid, pwd):
> + logging.error("test_memory: Could not set cgroup")
> + return -1
> + if item.set_property("memory.limit_in_bytes", (1024*1024*mem/2), pwd):
> + logging.error("test_memory: Could not set mem limit (mem)")
> + return -1
> + ps.stdin.write('\n')
> + i = 0
> + while ps.poll() == None:
> + if i > 60:
> + break
> + i += 1
> + time.sleep(1)
> + if i > 60:
> + logging.error("test_memory: Memory filling failed (mem)")
> + ps.terminate()
> + return -1
> + out = ps.stdout.readlines()
> + if len(out) < 2:
> + logging.error("test_memory: Process failed; output:\n%s", out)
> + return -1
> + if memsw:
> + if not out[-1].startswith("PASS"):
> + logging.error("test_memory: Unsuccessful memory filling (mem)")
> + logging.error("test_memory: cgroup_client.py returned %d; "
> + "output:\n%s", ps.poll(), out)
> + return -1
> + else:
> + if out[-1].startswith("PASS"):
> + logging.error("test_memory: Unexpected memory filling (mem)")
> + return -1
> + else:
> + filled = int(out[-2].split()[1][:-1])
> + if mem/2 > 1.5*filled:
> + logging.error("test_memory: Limit = %dM, Filled = %dM (+ "
> + "python overhead upto 1/3 (mem)", mem/2, filled)
> + else:
> + logging.debug("test_memory: Limit = %dM, Filled = %dM (+ "
> + "python overhead upto 1/3 (mem)", mem/2, filled)
> + logging.debug("test_memory: Memfill mem only cgroup passed")
> +
> + ################################################
> + # Fill the memory with 1/2 memory+swap limit
> + # Should fail
> + ################################################
> + if memsw:
> + ps = item.test("memfill %d" % mem)
> + if item.set_cgroup(ps.pid, pwd):
> + logging.error("test_memory: Could not set cgroup (memsw)")
> + return -1
> + if item.set_property("memory.memsw.limit_in_bytes",
> + (1024*1024*mem/2), pwd):
> + logging.error("test_memory: Could not set mem limit (memsw)")
> + return -1
> + ps.stdin.write('\n')
> + i = 0
> + while ps.poll() == None:
> + if i > 60:
> + break
> + i += 1
> + time.sleep(1)
> + if i > 60:
> + logging.error("test_memory: Memory filling failed (mem)")
> + ps.terminate()
> + return -1
> + out = ps.stdout.readlines()
> + if len(out) < 2:
> + logging.error("test_memory: Process failed; output:\n%s", out)
> + return -1
> + if out[-1].startswith("PASS"):
> + logging.error("test_memory: Unexpected memory filling (memsw)",
> + mem)
> + return -1
> + else:
> + filled = int(out[-2].split()[1][:-1])
> + if mem/2 > 1.5*filled:
> + logging.error("test_memory: Limit = %dM, Filled = %dM (+ "
> + "python overhead upto 1/3 (memsw)", mem/2, filled)
> + else:
> + logging.debug("test_memory: Limit = %dM, Filled = %dM (+ "
> + "python overhead upto 1/3 (memsw)", mem/2, filled)
> + logging.debug("test_memory: Memfill mem+swap cgroup passed")
> +
> + # cleanup
> + if item.rm_cgroup(pwd):
> + logging.error("test_memory: Can't remove cgroup directory")
> + return -1
> + os.system("swapon -a")
> + logging.debug("test_memory: Cleanup passed")
> +
> + logging.info("Leaving 'test_memory': PASSED")
> + return 0
> diff --git a/client/tests/cgroup/cgroup_client.py b/client/tests/cgroup/cgroup_client.py
> new file mode 100755
> index 0000000..ff098ef
> --- /dev/null
> +++ b/client/tests/cgroup/cgroup_client.py
> @@ -0,0 +1,116 @@
> +#!/usr/bin/python
> +# -*- coding: utf-8 -*-
> +"""
> +Interactive python script for testing cgroups
> +
> +@copyright: 2011 Red Hat Inc.
> +@author: Lukas Doktor <ldoktor@xxxxxxxxxx>
> +"""
> +import array, sys, time, math
> +
> +def test_smoke():
> + """
> + SIGSTOP the process and after SIGCONT exits.
> + """
> + print "TEST: smoke"
> + print "TEST: wait for input"
> + raw_input()
> + print "PASS: smoke"
> +
> +
> +def test_memfill(size=1024):
> + """
> + SIGSTOP and after SIGCONT fills the memory up to size size.
> + """
> + print "TEST: memfill (%dM)" % size
> + print "TEST: wait for input"
> + raw_input()
> + mem = array.array('B')
> + buf = ""
> + for i in range(1024*1024):
> + buf += '\x00'
> + for i in range(size):
> + mem.fromstring(buf)
> + #for j in range(1024*1024):
> + # mem.append(0)
> + print "TEST: %dM" % i
> + print "PASS: memfill (%dM)" % size
> +
> +
> +def test_cpu():
> + """
> + Stress the CPU
> + """
> + print "TEST: cpu"
> + print "TEST: wait for input"
> + raw_input()
> + while True:
> + for i in range (1000, 10000):
> + math.factorial(i)
> +
> +
> +def test_devices_read():
> + """
> + Inf read from /dev/zero
> + """
> + print "TEST: devices read"
> + print "TEST: wait for input"
> + raw_input()
> +
> + dev = open("/dev/zero", 'r')
> + while True:
> + print "TEST: tick"
> + dev.flush()
> + dev.read(1024*1024)
> + time.sleep(1)
> +
> +
> +def test_devices_write():
> + """
> + Inf write into /dev/null device
> + """
> + print "TEST: devices write"
> + print "TEST: wait for input"
> + raw_input()
> +
> + dev = open("/dev/null", 'w')
> + buf = ""
> + for _ in range(1024*1024):
> + buf += '\x00'
> + while True:
> + print "TEST: tick"
> + dev.write(buf)
> + dev.flush()
> + time.sleep(1)
> +
> +
> +def main():
> + """
> + Main (infinite) loop.
> + """
> + if len(sys.argv) < 2:
> + print "FAIL: Incorrect usage"
> + return -1
> + if sys.argv[1] == "smoke":
> + test_smoke()
> + elif sys.argv[1] == "memfill":
> + if len(sys.argv) > 2:
> + test_memfill(int(sys.argv[2]))
> + else:
> + test_memfill()
> + elif sys.argv[1] == "cpu":
> + test_cpu()
> + elif sys.argv[1] == "devices":
> + if len(sys.argv) > 2:
> + if (sys.argv[2] == "write"):
> + test_devices_write()
> + else:
> + test_devices_read()
> + else:
> + test_devices_read()
> + else:
> + print "FAIL: No test specified"
> +
> +if __name__ == "__main__":
> + main()
> +
> diff --git a/client/tests/cgroup/control b/client/tests/cgroup/control
> new file mode 100644
> index 0000000..86aec06
> --- /dev/null
> +++ b/client/tests/cgroup/control
> @@ -0,0 +1,12 @@
> +AUTHOR = "Lukas Doktor <ldoktor@xxxxxxxxxx>"
> +NAME = "Cgroup"
> +TIME = "SHORT"
> +TEST_CATEGORY = "Functional"
> +TEST_CLASS = "General"
> +TEST_TYPE = "client"
> +
> +DOC = """
> +This test checks basic functionality of cgroups
> +"""
> +
> +job.run_test('cgroup')
> --
> 1.7.6
>
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--
Lucas
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