db22bdcab5
Add aditional tests based around [1] that introduces guest deployments with multi-NUMA. The first new test is based on a symmetrical load with the same number of vCPUs and memory per physical NUMA. The second test limits a quarter of the resources to land on one NUMA and the remaining 75% on the other. For example a 4 vCPU 1024 RAM guest would configured NUMA 0 to hold 1 vCPU and 256 with NUMA 1 would hold the remaining for the guest. This type of deployment models high scale NFV architecture, where the control plane vCPUs may all be shared on a specific NUMA while the dataplane vCPUs would want to be dedicated and land on a NUMA that is connected to the compute host's NICs. [1] https://specs.openstack.org/openstack/nova-specs/specs/victoria/implemented/use-pcpu-vcpu-in-one-instance.html Change-Id: Iab013b22e60d9d86666fedd76b5a73fe45b3bb98
58 lines
2.1 KiB
Python
58 lines
2.1 KiB
Python
# Copyright 2021 Red Hat
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# All Rights Reserved.
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#
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# 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 whitebox_tempest_plugin import hardware
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class NUMAHelperMixin(object):
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"""Mixin class containing helpers to obtain NUMA-related information about
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a server from its XML.
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"""
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def get_pinning_as_set(self, server_id):
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pinset = set()
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root = self.get_server_xml(server_id)
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vcpupins = root.findall('./cputune/vcpupin')
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for pin in vcpupins:
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pinset |= hardware.parse_cpu_spec(pin.get('cpuset'))
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return pinset
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def get_server_emulator_threads(self, server_id):
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"""Get the host CPU numbers to which the server's emulator threads are
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pinned.
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:param server_id: The instance UUID to look up.
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:return emulator_threads: A set of host CPU numbers.
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"""
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root = self.get_server_xml(server_id)
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emulatorpins = root.findall('./cputune/emulatorpin')
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emulator_threads = set()
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for pin in emulatorpins:
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emulator_threads |= hardware.parse_cpu_spec(
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pin.get('cpuset'))
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return emulator_threads
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def get_host_pcpus_for_guest_vcpu(self, server_id, instance_cpu_ids):
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"""Search the xml vcpu element of the provided instance for its cpuset.
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Convert cpuset found into a set of integers.
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"""
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root = self.get_server_xml(server_id)
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vcpus = [root.find("./cputune/vcpupin[@vcpu='%s']" % cpu_id) for
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cpu_id in instance_cpu_ids]
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cpusets = [vcpu.attrib.get('cpuset') for vcpu in vcpus]
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return hardware.parse_cpu_spec(','.join(cpusets))
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