Hi Stefan, I still have another concern like following.
Has x-data-plane been used (or accepted) widely in systems. I have this concern since if it hasn't been widely accepted, it may have/cause some problems we don't know. Do you know some hidden problems which may caused by QEMU x-data-plane feature in systems? Thanks, Weiwei Jia On Fri, Dec 16, 2016 at 9:32 AM, Weiwei Jia <harryn...@gmail.com> wrote: > 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
