27 Aug
2014
27 Aug
'14
6:21 p.m.
On Tue, Aug 26, 2014 at 1:38 AM, John Ferlan <jferlan@redhat.com> wrote:
+ value. Each device must use a unique IOThread and threads will + be numbered from 1 to the domain iothreads value.
It is reasonable for multiple devices to share the same IOThread. For example, if you define just 1 IOThread and bind all virtio-blk devices to it you have a similar setup as the QEMU (no IOThreads) with the big exception that the QEMU global mutex is not needed for virtio-blk I/O request processing. This can already result in a performance improvement and may make sense where there are many disks but few host CPUs. Stefan