+ # Get huge pages information
+ huge_size = DUTSetup.get_huge_page_size(node)
+ huge_free = DUTSetup.get_huge_page_free(node, huge_size)
+ huge_total = DUTSetup.get_huge_page_total(node, huge_size)
+
+ # Check if memory reqested is available on host
+ if (mem_size * 1024) > (huge_free * huge_size):
+ # If we want to allocate hugepage dynamically
+ if allocate:
+ mem_needed = (mem_size * 1024) - (huge_free * huge_size)
+ huge_to_allocate = ((mem_needed / huge_size) * 2) + huge_total
+ max_map_count = huge_to_allocate*4
+ # Increase maximum number of memory map areas a process may have
+ ret_code, _, _ = ssh.exec_command_sudo(
+ 'echo "{0}" | sudo tee /proc/sys/vm/max_map_count'.
+ format(max_map_count))
+ if int(ret_code) != 0:
+ raise RuntimeError('Increase map count failed on {host}'.
+ format(host=node['host']))
+ # Increase hugepage count
+ ret_code, _, _ = ssh.exec_command_sudo(
+ 'echo "{0}" | sudo tee /proc/sys/vm/nr_hugepages'.
+ format(huge_to_allocate))
+ if int(ret_code) != 0:
+ raise RuntimeError('Mount huge pages failed on {host}'.
+ format(host=node['host']))
+ # If we do not want to allocate dynamicaly end with error
+ else:
+ raise RuntimeError('Not enough free huge pages: {0}, {1} MB'.
+ format(huge_free, huge_free * huge_size))
+ # Check if huge pages mount point exist
+ has_huge_mnt = False
+ ret_code, stdout, _ = ssh.exec_command('cat /proc/mounts')
+ if int(ret_code) == 0:
+ for line in stdout.splitlines():
+ # Try to find something like:
+ # none /mnt/huge hugetlbfs rw,relatime,pagesize=2048k 0 0
+ mount = line.split()
+ if mount[2] == 'hugetlbfs' and mount[1] == huge_mnt:
+ has_huge_mnt = True
+ break
+ # If huge page mount point not exist create one
+ if not has_huge_mnt:
+ ret_code, _, _ = ssh.exec_command_sudo(
+ 'mkdir -p {mnt}'.format(mnt=huge_mnt))
+ if int(ret_code) != 0:
+ raise RuntimeError('Create mount dir failed on {host}'.
+ format(host=node['host']))
+ ret_code, _, _ = ssh.exec_command_sudo(
+ 'mount -t hugetlbfs -o pagesize=2048k none {mnt}'.
+ format(mnt=huge_mnt))
+ if int(ret_code) != 0:
+ raise RuntimeError('Mount huge pages failed on {host}'.
+ format(host=node['host']))