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Re: [Qemu-devel] Lock contention in QEMU
From: |
Stefan Hajnoczi |
Subject: |
Re: [Qemu-devel] Lock contention in QEMU |
Date: |
Fri, 16 Dec 2016 09:48:50 +0000 |
User-agent: |
Mutt/1.7.1 (2016-10-04) |
On Thu, Dec 15, 2016 at 11:04:23AM -0500, Weiwei Jia wrote:
> On Thu, Dec 15, 2016 at 3:06 AM, Stefan Hajnoczi <address@hidden> 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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- [Qemu-devel] Lock contention in QEMU, Weiwei Jia, 2016/12/14
- Re: [Qemu-devel] Lock contention in QEMU, Stefan Hajnoczi, 2016/12/14
- Re: [Qemu-devel] Lock contention in QEMU, Weiwei Jia, 2016/12/14
- Re: [Qemu-devel] Lock contention in QEMU, Weiwei Jia, 2016/12/15
- Re: [Qemu-devel] Lock contention in QEMU, Stefan Hajnoczi, 2016/12/15
- Re: [Qemu-devel] Lock contention in QEMU, Weiwei Jia, 2016/12/15
- Re: [Qemu-devel] Lock contention in QEMU,
Stefan Hajnoczi <=
- Re: [Qemu-devel] Lock contention in QEMU, Weiwei Jia, 2016/12/16
- Re: [Qemu-devel] Lock contention in QEMU, Weiwei Jia, 2016/12/16
- Re: [Qemu-devel] Lock contention in QEMU, Stefan Hajnoczi, 2016/12/19
- Re: [Qemu-devel] Lock contention in QEMU, Weiwei Jia, 2016/12/19
- Re: [Qemu-devel] Lock contention in QEMU, Stefan Hajnoczi, 2016/12/15
- Re: [Qemu-devel] Lock contention in QEMU, Paolo Bonzini, 2016/12/15
- Re: [Qemu-devel] Lock contention in QEMU, Weiwei Jia, 2016/12/15
- Re: [Qemu-devel] Lock contention in QEMU, Weiwei Jia, 2016/12/15