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Parameter Name Description Type
VCPUs-params configuration parameters for
the selected VCPU policy.
You can tune a VCPU's
pinning with
xe vm-param-set \
uuid=<vm_uuid> \
VCPUs-params:mask=1,2,3
A VM created from this
template will then run on
physical CPUs 1, 2, and 3
only.
You can also tune the VCPU
priority (xen scheduling)
with the cap and weight
parameters; for example
xe vm-param-set \
uuid=<vm_uuid> \
VCPUs-params:weight=512
xe vm-param-set \
uuid=<vm_uuid> \
VCPUs-params:cap=100
A VM based on this template
with a weight of 512 will get
twice as much CPU as a
domain with a weight of 256
on a contended XenServer
host. Legal weights range
from 1 to 65535 and the
default is 256.
The cap optionally fixes the
maximum amount of CPU a
VM based on this template
will be able to consume, even
if the XenServer host has
idle CPU cycles. The cap is
expressed in percentage of
one physical CPU: 100 is 1
physical CPU, 50 is half a
CPU, 400 is 4 CPUs, etc. The
default, 0, means there is no
upper cap.
read/write map parameter
VCPUs-max maximum number of VCPUs read/write
VCPUs-at-startup boot number of VCPUs read/write