def __init__(self, cpu_nodes=4, cpu_sockets=1, cpu_cores=1, cpu_threads=2,
kb_mem=1048576, mempages=None, **kwargs):
super(NUMATopology, self).__init__(**kwargs)
cpu_count = 0
for cell_count in range(cpu_nodes):
cell = vconfig.LibvirtConfigCapsNUMACell()
cell.id = cell_count
cell.memory = kb_mem // cpu_nodes
for socket_count in range(cpu_sockets):
for cpu_num in range(cpu_cores * cpu_threads):
cpu = vconfig.LibvirtConfigCapsNUMACPU()
cpu.id = cpu_count
cpu.socket_id = cell_count
cpu.core_id = cpu_num // cpu_threads
cpu.siblings = set([cpu_threads *
(cpu_count // cpu_threads) + thread
for thread in range(cpu_threads)])
cell.cpus.append(cpu)
cpu_count += 1
# If no mempages are provided, use only the default 4K pages
if mempages:
cell.mempages = mempages[cell_count]
else:
cell.mempages = create_mempages([(4, cell.memory // 4)])
self.cells.append(cell)
def _gen_numa_topology(cls, cpu_nodes, cpu_sockets, cpu_cores,
cpu_threads, kb_mem, numa_mempages_list=None):
topology = vconfig.LibvirtConfigCapsNUMATopology()
cpu_count = 0
for cell_count in range(cpu_nodes):
cell = vconfig.LibvirtConfigCapsNUMACell()
cell.id = cell_count
cell.memory = kb_mem // cpu_nodes
for socket_count in range(cpu_sockets):
for cpu_num in range(cpu_cores * cpu_threads):
cpu = vconfig.LibvirtConfigCapsNUMACPU()
cpu.id = cpu_count
cpu.socket_id = cell_count
cpu.core_id = cpu_num // cpu_threads
cpu.siblings = set([cpu_threads *
(cpu_count // cpu_threads) + thread
for thread in range(cpu_threads)])
cell.cpus.append(cpu)
cpu_count += 1
# Set mempages per numa cell. if numa_mempages_list is empty
# we will set only the default 4K pages.
if numa_mempages_list:
mempages = numa_mempages_list[cell_count]
else:
mempages = vconfig.LibvirtConfigCapsNUMAPages()
mempages.size = 4
mempages.total = cell.memory // mempages.size
mempages = [mempages]
cell.mempages = mempages
topology.cells.append(cell)
return topology
