On Thu, Dec 15, 2016 at 11:04:23AM -0500, Weiwei Jia wrote: > On Thu, Dec 15, 2016 at 3:06 AM, Stefan Hajnoczi <stefa...@gmail.com> wrote: > > On Thu, Dec 15, 2016 at 12:17:09AM -0500, Weiwei Jia wrote: > >> BTW, do we have an example to show users how to config following > >> virtio-blk dataplane commands into XML configuration file? > >> > >> qemu -object iothread,id=iothread0 \ > >> -drive if=none,id=drive0,file=test.img,format=raw,cache=none \ > >> -device virtio-blk-pci,iothread=iothread0,drive=drive0 > > > > https://libvirt.org/formatdomain.html#elementsIOThreadsAllocation > > > > See also <cputune><iothreadpin> and <driver iothread=>. > > It seems that the libvirt XML configuration in above link [1] is > different from the configuration which you said in your blog [2]. Your > blog just said how to use x-data-plane for virtio-blk but libvirt XML > configuration doesn't say anything about x-data-plane. Does it in > default support by latest QEMU version. If I want to test virtio-blk > or virtio-scsi data-plane to make timeslice more stable, what version > of QEMU/KVM should I use? Would you please give me some suggestions? > Thank you. > > [1] https://libvirt.org/formatdomain.html#elementsIOThreadsAllocation > [2] > http://blog.vmsplice.net/2013/03/new-in-qemu-14-high-performance-virtio.html
I will update the blog post (from 2013) with the modern libvirt XML syntax. Please use the https://libvirt.org/formatdomain.html#elementsIOThreadsAllocation documentation (unless you are using a really old QEMU and libvirt!). Stefan
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