On Fri, Dec 16, 2016 at 4:48 AM, Stefan Hajnoczi <stefa...@gmail.com> wrote: > 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!).
I have tried the old libvirt XML way in your blog with QEMU v2.2.0 and Libvirt v1.2.2. It seems that everything works well for me. I will try the modern libvirt XML syntax with latest QEMU and libvirt. Thank you, Weiwei Jia
