1a2443ce67
This patch includes the ppc64/ppc64le architectures to the list of host architectures that support NUMA via the libvirt driver. This change is for the PowerPC based servers that use the libvirt driver. This also introduces the minimum libvirt version needed for PowerPC to support NUMA from Nova. Also note, that in order to retain the unit test that excluded PPC from the NUMA supported architectures, an arbitrary choice of architecture is made (S390) - that is not a part of the list that supports NUMA. Change-Id: I51dd3e160153b40072a04095e9bf3f15abd74252 Closes-Bug: #1516578
15 lines
628 B
YAML
15 lines
628 B
YAML
---
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features:
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- |
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Enables NUMA topology reporting on PowerPC architecture
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from the libvirt driver in Nova but with a caveat as mentioned below.
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NUMA cell affinity and dedicated cpu pinning
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code assumes that the host operating system is exposed to threads.
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PowerPC based hosts use core based scheduling for processes.
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Due to this, the cores on the PowerPC architecture are treated as
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threads. Since cores are always less than or equal
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to the threads on a system, this leads to non-optimal resource usage
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while pinning. This feature is supported from libvirt version 1.2.19
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for PowerPC.
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