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Bug 1693377 - [RFE] Add ability to use pinned and non-pinned CPUs in the same instance
Summary: [RFE] Add ability to use pinned and non-pinned CPUs in the same instance
Status: NEW
Alias: None
Product: Red Hat OpenStack
Classification: Red Hat
Component: openstack-nova
Version: 16.0 (T)
Hardware: Unspecified
OS: Unspecified
Target Milestone: ---
: ---
Assignee: nova-maint
QA Contact: nova-maint
Depends On: 1693372
TreeView+ depends on / blocked
Reported: 2019-03-27 16:55 UTC by Stephen Finucane
Modified: 2019-04-12 05:42 UTC (History)
9 users (show)

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Description Stephen Finucane 2019-03-27 16:55:32 UTC
Description of problem:

Currently, instances can be either pinned or unpinned. It is not possible to state that N cores and unpinned while the remainder are pinned. This is suboptimal since pinned cores cannot be overcommitted. For things like realtime, where we insist on some cores being marked as non-realtime, the non-realtime cores don't necessarily have to be pinned and we could improve resource utilization by allowing some cores to be shared.

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