openstack/nova
Code Issues Proposed changes

Assorted cleanups from numa-aware-vswitches series

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Resolve open issues from preceding patches.

Part of blueprint numa-aware-vswitches

Change-Id: I0c35109b67aa94cf19a4d20a97bf5ab15cf3db4e
This commit is contained in:
Stephen Finucane
2018-07-13 17:41:34 +01:00
committed by Dan Smith
parent 803f85d7e6
commit 24c016ed6c
7 changed files with 12 additions and 14 deletions
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4
doc/source/admin/cpu-topologies.rst
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@@ -31,13 +31,13 @@ Simultaneous Multi-Threading (SMT)
CPUs on the system and can execute workloads in parallel. However, as with
NUMA, threads compete for shared resources.
Non Uniform I/O Access (NUMA I/O)
Non-Uniform I/O Access (NUMA I/O)
In a NUMA system, I/O to a device mapped to a local memory region is more
efficient than I/O to a remote device. A device connected to the same socket
providing the CPU and memory offers lower latencies for I/O operations due to
its physical proximity. This generally manifests itself in devices connected
to the PCIe bus, such as NICs or vGPUs, but applies to any device support
memory mapped I/O.
memory-mapped I/O.
In OpenStack, SMP CPUs are known as *cores*, NUMA cells or nodes are known as
*sockets*, and SMT CPUs are known as *threads*. For example, a quad-socket,