15 lines
746 B
YAML
15 lines
746 B
YAML
---
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features:
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- |
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Introduces ``[compute]/cpu_shared_set`` option for compute nodes.
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Some workloads run best when the hypervisor overhead processes
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(emulator threads in libvirt/QEMU) can be placed on different
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physical host CPUs than other guest CPU resources. This allows
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those workloads to prevent latency spikes for guest vCPU threads.
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To place a workload's emulator threads on a set of isolated
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physical CPUs, set the ``[compute]/cpu_shared_set`` configuration
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option to the set of host CPUs that should be used for best-effort
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CPU resources. Then set a flavor extra spec to
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``hw:emulator_threads_policy=share`` to instruct nova to place
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that workload's emulator threads on that set of host CPUs. |