Oracle VM 3.4: xm vcpu-list shows CPUs pinned to the guest VMs although no manual pinning was performed

(Doc ID 2376844.1)

Last updated on MARCH 25, 2018

Applies to:

Oracle VM - Version 3.4.2 to 3.4.4 [Release OVM34]
Information in this document applies to any platform.

Goal

Why does xm vcpu-list shows CPUs pinned to the guest VMs although no manual pinning was performed on OVM 3.4.4?

As the following example shows, there is no hard pinning of vCPUs in the vm.cfg file for the DomU guest, and no pinning was performed using "xm vcpu-pin" command.

However, vcpu-list shows the vcpus are pinned to 0-15 pCPUs.

 

-- xm info

[..]

nr_cpus : 32
nr_nodes : 2
cores_per_socket : 8
threads_per_core : 2

[...]

-- xm list
Name ID Mem VCPUs State Time(s)
0004fb0000060000042409adef1574b1 1290 4099 2 -b---- 110047.9
0004fb00000600002472ae6f07e2a75b 1366 6147 2 r----- 76586.1
0004fb00000600003bcc148535c93550 21 8195 1 -b---- 41287.4
0004fb00000600003e421f2dd2bbefe9 1275 16387 4 -b---- 796231.4
0004fb0000060000456e0ce3ceb53e7a 5 8195 2 -b---- 284229.1
0004fb000006000050db5d5443d72f79 1334 32771 4 -b---- 52329.5 <<<<<<<<<<< Let's consider this VM

--xm vcpu-list

0004fb000006000050db5d5443d72f79 1334 0 5 -b- 12115.8 0-15
0004fb000006000050db5d5443d72f79 1334 1 12 -b- 12835.3 0-15
0004fb000006000050db5d5443d72f79 1334 2 14 -b- 12365.7 0-15
0004fb000006000050db5d5443d72f79 1334 3 13 -b- 13577.2 0-15

 

 


 

Solution

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