50 lines
2.1 KiB
Python
50 lines
2.1 KiB
Python
# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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from nova import objects
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from nova.scheduler import filters
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from nova.virt import hardware
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class NUMATopologyFilter(filters.BaseHostFilter):
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"""Filter on requested NUMA topology."""
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@filters.compat_legacy_props
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def host_passes(self, host_state, filter_properties):
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ram_ratio = host_state.ram_allocation_ratio
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cpu_ratio = host_state.cpu_allocation_ratio
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request_spec = filter_properties.get('request_spec', {})
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instance = request_spec.get('instance_properties', {})
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requested_topology = hardware.instance_topology_from_instance(instance)
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host_topology, _fmt = hardware.host_topology_and_format_from_host(
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host_state)
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pci_requests = instance.get('pci_requests')
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if pci_requests:
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pci_requests = pci_requests.requests
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if requested_topology and host_topology:
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limits = objects.NUMATopologyLimits(
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cpu_allocation_ratio=cpu_ratio,
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ram_allocation_ratio=ram_ratio)
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instance_topology = (hardware.numa_fit_instance_to_host(
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host_topology, requested_topology,
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limits=limits,
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pci_requests=pci_requests,
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pci_stats=host_state.pci_stats))
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if not instance_topology:
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return False
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host_state.limits['numa_topology'] = limits
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return True
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elif requested_topology:
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return False
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else:
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return True
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