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authorMaryam Tahhan <maryam.tahhan@intel.com>2016-08-10 12:19:58 +0000
committerGerrit Code Review <gerrit@172.30.200.206>2016-08-10 12:19:59 +0000
commit1dc40afad832bca427058380a629634aa3cb104c (patch)
tree1dc1b9320c9dd481b932e7073b3d66172fbf49ab /tools/hugepages.py
parenta9e754b1050b17464d9e77a942068956d872894e (diff)
parent5b0a5930281751842062c4b7f29de46c366b88f3 (diff)
Merge "hugepages: change default num pages + deallocate"
Diffstat (limited to 'tools/hugepages.py')
-rw-r--r--tools/hugepages.py43
1 files changed, 30 insertions, 13 deletions
diff --git a/tools/hugepages.py b/tools/hugepages.py
index 02e4f29c..bba40122 100644
--- a/tools/hugepages.py
+++ b/tools/hugepages.py
@@ -26,7 +26,7 @@ from tools import tasks
from conf import settings
_LOGGER = logging.getLogger(__name__)
-
+_allocated_hugepages = False
#
# hugepage management
#
@@ -53,23 +53,39 @@ def allocate_hugepages():
"""Allocate hugepages on the fly
"""
hp_size = get_hugepage_size()
-
if hp_size > 0:
- nr_hp = int(math.ceil(settings.getValue('HUGEPAGE_RAM_ALLOCATION')/hp_size))
- _LOGGER.info('Will allocate %s hugepages.', nr_hp)
+ nr_hp = int(math.ceil(settings.getValue('HUGEPAGE_RAM_ALLOCATION')/hp_size))
+ _LOGGER.info('Will allocate %s hugepages.', nr_hp)
+
+ nr_hugepages = 'vm.nr_hugepages=' + str(nr_hp)
+ try:
+ tasks.run_task(['sudo', 'sysctl', nr_hugepages],
+ _LOGGER, 'Trying to allocate hugepages..', True)
+ except subprocess.CalledProcessError:
+ _LOGGER.error('Unable to allocate hugepages.')
+ return False
+ global _allocated_hugepages
+ _allocated_hugepages = True
+ return True
- nr_hugepages = 'vm.nr_hugepages=' + str(nr_hp)
+ else:
+ _LOGGER.error('Division by 0 will be supported in next release')
+ return False
+
+def deallocate_hugepages():
+ """De-allocate hugepages that were allocated on the fly
+ """
+ global _allocated_hugepages
+ if _allocated_hugepages:
+ nr_hugepages = 'vm.nr_hugepages= 0'
try:
tasks.run_task(['sudo', 'sysctl', nr_hugepages],
- _LOGGER, 'Trying to allocate hugepages..', True)
+ _LOGGER, 'Trying to de-allocate hugepages..', True)
except subprocess.CalledProcessError:
- _LOGGER.error('Unable to allocate hugepages.')
+ _LOGGER.error('Unable to de-allocate hugepages.')
return False
- return True
-
- else:
- _LOGGER.error('Division by 0 will be supported in next release')
- return False
+ _allocated_hugepages = False
+ return True
def get_free_hugepages(socket=None):
@@ -178,4 +194,5 @@ def umount_hugepages():
except subprocess.CalledProcessError:
_LOGGER.error('Unable to umount hugepages.')
-
+ if not deallocate_hugepages():
+ _LOGGER.error('Unable to deallocate previously allocated hugepages.')