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https://bugzilla.redhat.com/show_bug.cgi?id=1135491 $ virsh iothread --help NAME iothreadpin - control domain IOThread affinity SYNOPSIS iothreadpin <domain> <iothread> <cpulist> [--config] [--live] [--current] DESCRIPTION Pin domain IOThreads to host physical CPUs. OPTIONS [--domain] <string> domain name, id or uuid [--iothread] <number> IOThread ID number [--cpulist] <string> host cpu number(s) to set --config affect next boot --live affect running domain --current affect current domain Using the output from iothreadsinfo, allow changing the pinned CPUs for a single IOThread. $ virsh iothreadsinfo $dom IOThread ID CPU Affinity --------------------------------------------------- 1 2 2 3 3 0-1 $ virsh iothreadpin $dom 3 0-2 Then view the change $ virsh iothreadsinfo $dom IOThread ID CPU Affinity --------------------------------------------------- 1 2 2 3 3 0-2 If an invalid value is supplied or require option missing, then an error will be displayed: $ virsh iothreadpin $dom 4 3 error: invalid argument: iothread value out of range 4 > 3 $ virsh iothreadpin $dom 3 error: command 'iothreadpin' requires <cpulist> option
LibVirt : simple API for virtualization
Libvirt is a C toolkit to interact with the virtualization capabilities
of recent versions of Linux (and other OSes). It is free software
available under the GNU Lesser General Public License. Virtualization of
the Linux Operating System means the ability to run multiple instances of
Operating Systems concurrently on a single hardware system where the basic
resources are driven by a Linux instance. The library aim at providing
long term stable C API initially for the Xen paravirtualization but
should be able to integrate other virtualization mechanisms if needed.
Daniel Veillard <veillard@redhat.com>