How to configure CPU Isolation in Red Hat Openstack Platform 8 / Red Hat Enterprise Linux 7.2

Solution Verified - Updated -

Issue

  • In Red Hat Openstack Platform 8 / Red Hat Enterprise Linux 7.2, using 'isolcpus' will result a re-use of only one Physical CPU (pCPU) , without load balancing with other pCPUs, with contrary to previous release where there was a load balance between them.
  • This behavior results a significant performance degradation as the number of cores assigned to the VM will increase.

Environment

  • Red Hat Openstack Platform 8 (with/without CPU pinning).
  • Red Hat Enterprise Linux 7.2 (with/without CPU pinning).
  • Not applicable for a KVM-RT environment.

Subscriber exclusive content

A Red Hat subscription provides unlimited access to our knowledgebase of over 48,000 articles and solutions.

Current Customers and Partners

Log in for full access

Log In
Close

Welcome! Check out the Getting Started with Red Hat page for quick tours and guides for common tasks.