Awful FreeBSD 9 block IO performance in KVM

[Adrian Chadd]

On 20 July 2012 15:26, Richard Yao <ryao at gentoo.org> wrote:


> I am in the process of setting up a VM instance specifically for this.
> While installing it, I noticed that qemu-kvm printed 'lsi_scsi: error:
> ORDERED queue not implemented', which might be a clue as to why the
> block device performance is bad.
>
> Also, I will try testing raw disk IO for Ivan after I have it setup.

Thanks for setting this up. Setting up an easily reproducible
environment is by far the biggest and most helpful step here.



Adrian