def get_buddy_info(sleep=False):
"""Get buddy info"""
if sleep:
time.sleep(10)
buddy_info = utils_memory.get_buddy_info('0', session=session)['0']
logging.info('Checked buddy info, value is %s', buddy_info)
return buddy_info
def get_target_hugepages(self):
"""
Calculate the target number of hugepages for testing purposes.
"""
if self.vms < self.max_vms:
self.vms = self.max_vms
# memory of all VMs plus qemu overhead of 128MB per guest
# (this value can be overriden in your cartesian config)
vmsm = self.vms * (self.mem + self.qemu_overhead)
target_hugepages = int(vmsm * 1024 / self.hugepage_size)
# FIXME Now the buddyinfo can not get chunk info which is bigger
# than 4M. So this will only fit for 2M size hugepages. Can not work
# when hugepage size is 1G.
# And sometimes huge page can not get all pages so decrease the page
# for about 10 huge page to make sure the allocate can success
decreased_pages = 10
if self.hugepage_size > 2048:
self.hugepage_force_allocate = "yes"
if self.hugepage_force_allocate == "no":
hugepage_allocated = open(self.kernel_hp_file, "r")
available_hugepages = int(hugepage_allocated.read().strip())
hugepage_allocated.close()
chunk_bottom = int(math.log(self.hugepage_size / 4, 2))
chunk_info = utils_memory.get_buddy_info(">=%s" % chunk_bottom,
zones="DMA32 Normal")
for size in chunk_info:
available_hugepages += int(
chunk_info[size] *
math.pow(2, int(int(size) - chunk_bottom)))
available_hugepages = available_hugepages - decreased_pages
if target_hugepages > available_hugepages:
logging.warn("This test requires more huge pages than we"
" currently have, we'll try to allocate the"
" biggest number the system can support.")
target_hugepages = available_hugepages
available_mem = available_hugepages * self.hugepage_size
self.suggest_mem = int(available_mem / self.vms / 1024 -
self.qemu_overhead)
if self.suggest_mem < self.lowest_mem_per_vm:
raise MemoryError("Sugguest memory %sM is too small for"
" guest to boot up. Please check your"
" host memory "
"status." % self.suggest_mem)
return target_hugepages
def get_target_hugepages(self):
"""
Calculate the target number of hugepages for testing purposes.
"""
if self.vms < self.max_vms:
self.vms = self.max_vms
# memory of all VMs plus qemu overhead of 128MB per guest
# (this value can be overriden in your cartesian config)
vmsm = self.vms * (self.mem + self.qemu_overhead)
target_hugepages = int(vmsm * 1024 / self.hugepage_size)
# FIXME Now the buddyinfo can not get chunk info which is bigger
# than 4M. So this will only fit for 2M size hugepages. Can not work
# when hugepage size is 1G.
# And sometimes huge page can not get all pages so decrease the page
# for about 10 huge page to make sure the allocate can success
decreased_pages = 10
if self.hugepage_size > 2048:
self.hugepage_force_allocate = "yes"
if self.hugepage_force_allocate == "no":
hugepage_allocated = open(self.kernel_hp_file, "r")
available_hugepages = int(hugepage_allocated.read().strip())
hugepage_allocated.close()
chunk_bottom = int(math.log(self.hugepage_size / 4, 2))
chunk_info = utils_memory.get_buddy_info(">=%s" % chunk_bottom, zones="DMA32 Normal")
for size in chunk_info:
available_hugepages += int(chunk_info[size] * math.pow(2, int(int(size) - chunk_bottom)))
available_hugepages = available_hugepages - decreased_pages
if target_hugepages > available_hugepages:
logging.warn(
"This test requires more huge pages than we"
" currently have, we'll try to allocate the"
" biggest number the system can support."
)
target_hugepages = available_hugepages
available_mem = available_hugepages * self.hugepage_size
self.suggest_mem = int(available_mem / self.vms / 1024 - self.qemu_overhead)
if self.suggest_mem < self.lowest_mem_per_vm:
raise MemoryError(
"This host doesn't have enough free "
"large memory pages for this test to "
"run (only %s MB memory available for "
"each guest)" % self.suggest_mem
)
return target_hugepages