Re: Awful FreeBSD 9 block IO performance in KVM

From: Adrian Chadd <adrian_at_freebsd.org>
Date: Fri, 20 Jul 2012 15:58:21 -0700
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
Received on Fri Jul 20 2012 - 20:58:21 UTC

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