def setUp(self):
'''
Sets all the reqd parameter and also
mounts the tmpfs to be used in test.
'''
# Set params as per available memory in system
self.mem_path = self.params.get("t_dir",
default=os.path.join(
data_dir.get_tmp_dir(),
'thp_space'))
free_mem = self.params.get("mem_size",
default=memory.meminfo.MemFree.m)
self.dd_timeout = self.params.get("dd_timeout", default=900)
self.thp_split = None
try:
memory.read_from_vmstat("thp_split_page")
self.thp_split = "thp_split_page"
except IndexError:
self.thp_split = "thp_split"
# Set block size as hugepage size * 2
self.block_size = memory.meminfo.Hugepagesize.m * 2
self.count = free_mem // self.block_size
# Mount device as per free memory size
if not os.path.exists(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=%dM' % free_mem)
def setUp(self):
'''
Sets all the reqd parameter and also
mounts the tmpfs to be used in test.
'''
# Set params as per available memory in system
self.mem_path = os.path.join(data_dir.get_tmp_dir(), 'thp_space')
free_mem = int(memory.freememtotal() / 1024)
self.dd_timeout = 900
self.thp_split = None
try:
memory.read_from_vmstat("thp_split_page")
self.thp_split = "thp_split_page"
except IndexError:
self.thp_split = "thp_split"
# Set block size as hugepage size * 2
self.block_size = (memory.get_huge_page_size() / 1024) * 2
self.count = free_mem / self.block_size
# Mount device as per free memory size
if not os.path.exists(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=%dM' % free_mem)
def test(self):
'''
Enables THP , Runs the dd workload and checks whether THP
has been allocated.
'''
# Enables THP
try:
memory.set_thp_value("enabled", "always")
except Exception as details:
self.fail("Failed %s" % details)
# Read thp values before stressing the system
thp_alloted_before = int(memory.read_from_vmstat("thp_fault_alloc"))
thp_split_before = int(memory.read_from_vmstat(self.thp_split))
thp_collapse_alloc_before = int(
memory.read_from_vmstat("thp_collapse_alloc"))
# Start Stresssing the System
self.log.info('Stress testing using dd command')
for iterator in range(self.count):
stress_cmd = 'dd if=/dev/zero of=%s/%d bs=%dM count=1'\
% (self.mem_path, iterator, self.block_size)
if (process.system(stress_cmd,
timeout=self.dd_timeout,
verbose=False,
ignore_status=True,
shell=True)):
self.fail('dd command failed %s' % stress_cmd)
# Read thp values after stressing the system
thp_alloted_after = int(memory.read_from_vmstat("thp_fault_alloc"))
thp_split_after = int(memory.read_from_vmstat(self.thp_split))
thp_collapse_alloc_after = int(
memory.read_from_vmstat("thp_collapse_alloc"))
# Check whether THP is Used or not
if thp_alloted_after <= thp_alloted_before:
e_msg = "Thp usage count has not increased\n"
e_msg += "Before Stress:%d\nAfter stress:%d" % (thp_alloted_before,
thp_alloted_after)
self.fail(e_msg)
else:
thp_fault_alloc = thp_alloted_after - thp_alloted_before
thp_split = thp_split_after - thp_split_before
thp_collapse_alloc = (thp_collapse_alloc_after -
thp_collapse_alloc_before)
self.log.info("\nTest statistics, changes during test run:")
self.log.info(
"thp_fault_alloc=%d\nthp_split=%d\n"
"thp_collapse_alloc=%d\n", thp_fault_alloc, thp_split,
thp_collapse_alloc)
def test(self):
'''
Enables THP , Runs the dd workload and checks whether THP
has been allocated.
'''
# Enables THP
try:
memory.set_thp_value("enabled", "always")
except Exception as details:
self.fail("Failed %s" % details)
# Read thp values before stressing the system
thp_alloted_before = int(memory.read_from_vmstat("thp_fault_alloc"))
thp_split_before = int(memory.read_from_vmstat("thp_split_page"))
thp_collapse_alloc_before = int(memory.read_from_vmstat
("thp_collapse_alloc"))
# Start Stresssing the System
self.log.info('Stress testing using dd command')
for iterator in range(self.count):
stress_cmd = 'dd if=/dev/zero of=%s/%d bs=%dM count=1'\
% (self.mem_path, iterator, self.block_size)
if(process.system(stress_cmd, timeout=self.dd_timeout,
verbose=False, ignore_status=True, shell=True)):
self.fail('dd command failed %s' % stress_cmd)
# Read thp values after stressing the system
thp_alloted_after = int(memory.read_from_vmstat("thp_fault_alloc"))
thp_split_after = int(memory.read_from_vmstat("thp_split_page"))
thp_collapse_alloc_after = int(memory.read_from_vmstat
("thp_collapse_alloc"))
# Check whether THP is Used or not
if thp_alloted_after <= thp_alloted_before:
e_msg = "Thp usage count has not increased\n"
e_msg += "Before Stress:%d\nAfter stress:%d" % (thp_alloted_before,
thp_alloted_after)
self.fail(e_msg)
else:
thp_fault_alloc = thp_alloted_after - thp_alloted_before
thp_split = thp_split_after - thp_split_before
thp_collapse_alloc = (thp_collapse_alloc_after -
thp_collapse_alloc_before)
self.log.info("\nTest statistics, changes during test run:")
self.log.info("thp_fault_alloc=%d\nthp_split=%d\n"
"thp_collapse_alloc=%d\n",
thp_fault_alloc, thp_split, thp_collapse_alloc)
