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2013 Jul 10
3
Performance of Xen VCPU Scheduling
Hello,
I observed that a configuration where dom0 vcpus were pinned to a set of
pcpus in the host using dom0_vcpus_pin and the guests were prevented
from running on the dom0 pcpus (here called "exclusively-pinned dom0
vcpus", or xpin) caused the general performance of the guests in a host
with around 24 pcpus or more to increase during bootstorms and high
density of guests, even though there were less pcpus available to the
guests.
While trying to understand why this increased performance is not present
in the default non-...