def setUp(self):
'''
Sets the Required params for dd and mounts the tmpfs dir
'''
self.swap_free = []
mem_free = memory.read_from_meminfo("MemFree") / 1024
mem = memory.read_from_meminfo("MemTotal") / 1024
swap = memory.read_from_meminfo("SwapTotal") / 1024
self.hugepage_size = memory.read_from_meminfo("Hugepagesize") / 1024
self.swap_free.append(memory.read_from_meminfo("SwapFree") / 1024)
self.mem_path = os.path.join(data_dir.get_tmp_dir(), 'thp_space')
self.dd_timeout = 900
# If swap is enough fill all memory with dd
if self.swap_free > (mem - mem_free):
self.count = (mem / self.hugepage_size) / 2
tmpfs_size = mem
else:
self.count = (mem_free / self.hugepage_size) / 2
tmpfs_size = mem_free
if swap <= 0:
self.skip("Swap is not enabled in the system")
if not os.path.ismount(self.mem_path):
if not os.path.isdir(self.mem_path):
os.makedirs(self.mem_path)
self.device = Partition(device="none", mountpoint=self.mem_path)
self.device.mount(mountpoint=self.mem_path,
fstype="tmpfs",
args="-o size=%sM" % tmpfs_size)
def test(self):
'''
Enables THP Runs dd, fills out the available memory and checks whether
THP is swapped out.
'''
# Enables THP
try:
memory.set_thp_value("enabled", "always")
except Exception as details:
self.fail("Failed %s" % details)
for iterator in range(self.count):
swap_cmd = "dd if=/dev/zero of=%s/%d bs=%sM "\
"count=1" % (self.mem_path, iterator,
self.hugepage_size * 2)
if (process.system(swap_cmd,
timeout=self.dd_timeout,
verbose=False,
ignore_status=True,
shell=True)):
self.fail('Swap command Failed %s' % swap_cmd)
self.swap_free.append(memory.read_from_meminfo("SwapFree") / 1024)
# Checks Swap is used or not
if self.swap_free[1] - self.swap_free[0] >= 0:
self.fail("Swap Space remains untouched")
def test(self):
"""
Execute 'stress' with proper arguments.
"""
length = self.params.get('stress_lenght', default=60)
threads = self.params.get('threads', default=None)
memory_per_thread = self.params.get('memory_per_thread', default=None)
file_size_per_thread = self.params.get('file_size_per_thread',
default=None)
if threads is None:
# We will use 2 workers of each type for each CPU detected
threads = 2 * multiprocessing.cpu_count()
if memory_per_thread is None:
# Sometimes the default memory used by each memory worker (256 M)
# might make our machine go OOM and then funny things might start
# to happen. Let's avoid that.
mb = (memory.freememtotal() +
memory.read_from_meminfo('SwapFree') / 2)
memory_per_thread = (mb * 1024) / threads
if file_size_per_thread is None:
# Even though unlikely, it's good to prevent from allocating more
# disk than this machine actually has on its autotest directory
# (limit the amount of disk used to max of 90 % of free space)
free_disk = disk.freespace(self.sourcedir)
file_size_per_thread = 1024 ** 2
if (0.9 * free_disk) < file_size_per_thread * threads:
file_size_per_thread = (0.9 * free_disk) / threads
# Number of CPU workers spinning on sqrt()
args = '--cpu %d ' % threads
# Number of IO workers spinning on sync()
args += '--io %d ' % threads
# Number of Memory workers spinning on malloc()/free()
args += '--vm %d ' % threads
# Amount of memory used per each worker
args += '--vm-bytes %d ' % memory_per_thread
# Number of HD workers spinning on write()/ulink()
args += '--hdd %d ' % threads
# Size of the files created by each worker in bytes
args += '--hdd-bytes %d ' % file_size_per_thread
# Time for which the stress test will run
args += '--timeout %d ' % length
# Verbose flag
args += '--verbose'
os.chdir(self.sourcedir)
cmd = ('./src/stress %s' % args)
process.run(cmd)
def test(self):
"""
Execute 'stress' with proper arguments.
"""
length = self.params.get('stress_lenght', default=60)
threads = self.params.get('threads', default=None)
memory_per_thread = self.params.get('memory_per_thread', default=None)
file_size_per_thread = self.params.get('file_size_per_thread',
default=None)
if threads is None:
# We will use 2 workers of each type for each CPU detected
threads = 2 * multiprocessing.cpu_count()
if memory_per_thread is None:
# Sometimes the default memory used by each memory worker (256 M)
# might make our machine go OOM and then funny things might start
# to happen. Let's avoid that.
mb = (memory.freememtotal() +
memory.read_from_meminfo('SwapFree') / 2)
memory_per_thread = (mb * 1024) / threads
if file_size_per_thread is None:
# Even though unlikely, it's good to prevent from allocating more
# disk than this machine actually has on its autotest directory
# (limit the amount of disk used to max of 90 % of free space)
free_disk = disk.freespace(self.sourcedir)
file_size_per_thread = 1024**2
if (0.9 * free_disk) < file_size_per_thread * threads:
file_size_per_thread = (0.9 * free_disk) / threads
# Number of CPU workers spinning on sqrt()
args = '--cpu %d ' % threads
# Number of IO workers spinning on sync()
args += '--io %d ' % threads
# Number of Memory workers spinning on malloc()/free()
args += '--vm %d ' % threads
# Amount of memory used per each worker
args += '--vm-bytes %d ' % memory_per_thread
# Number of HD workers spinning on write()/ulink()
args += '--hdd %d ' % threads
# Size of the files created by each worker in bytes
args += '--hdd-bytes %d ' % file_size_per_thread
# Time for which the stress test will run
args += '--timeout %d ' % length
# Verbose flag
args += '--verbose'
os.chdir(self.sourcedir)
cmd = ('./src/stress %s' % args)
process.run(cmd)
