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Re: [Qemu-devel] virtio-blk multiqueue support in qemu.
From: |
Paolo Bonzini |
Subject: |
Re: [Qemu-devel] virtio-blk multiqueue support in qemu. |
Date: |
Mon, 13 Jul 2015 13:24:15 +0200 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.0.1 |
On 13/07/2015 13:21, Michael S. Tsirkin wrote:
> > Yes, this is already how virtio-scsi multiqueue is implemented. The
> > speedup is noticeable. However, for virtio-blk there is a huge
> > consumption of interrupt vectors in the guest, so it doesn't scale to
> > multiple disks as well as virtio-scsi.
>
> Could you elaborate please? interrupt vector usage is generally
> up to the guest, so whatever the issue is might be fixable by driver
> changes alone.
Yes, but in practice neither Linux nor Windows (AFAIK) are able to share
the same vector across multiple MSIs.
Paolo
- [Qemu-devel] virtio-blk multiqueue support in qemu., Naredula Janardhana Reddy, 2015/07/01
- Re: [Qemu-devel] virtio-blk multiqueue support in qemu., Fam Zheng, 2015/07/01
- Re: [Qemu-devel] virtio-blk multiqueue support in qemu., Michael S. Tsirkin, 2015/07/08
- Re: [Qemu-devel] virtio-blk multiqueue support in qemu., Stefan Hajnoczi, 2015/07/09
- Message not available
- Re: [Qemu-devel] virtio-blk multiqueue support in qemu., Michael S. Tsirkin, 2015/07/09
- Re: [Qemu-devel] virtio-blk multiqueue support in qemu., Naredula Janardhana Reddy, 2015/07/10
- Re: [Qemu-devel] virtio-blk multiqueue support in qemu., Stefan Hajnoczi, 2015/07/13
- Re: [Qemu-devel] virtio-blk multiqueue support in qemu., Paolo Bonzini, 2015/07/13
- Re: [Qemu-devel] virtio-blk multiqueue support in qemu., Michael S. Tsirkin, 2015/07/13
- Re: [Qemu-devel] virtio-blk multiqueue support in qemu.,
Paolo Bonzini <=
- Re: [Qemu-devel] virtio-blk multiqueue support in qemu., Michael S. Tsirkin, 2015/07/13