Re: [kvm-devel] [patch 2/2] QEMU: decrease console "refresh rate" with -nographic

[Avi K. <av...@qu...>]

Carsten Otte wrote:
> Anthony Liguori wrote:
>> There is a 5th option.  Do away with the use of posix aio.  We get 
>> absolutely no benefit from it because it's limited to a single 
>> thread.  Fabrice has reverted a patch to change that in the past.
> How about using linux aio for it? It seems much better, because it 
> doesn't use userspace threads but has a direct in-kernel 
> implementation. I've had good performance on zldisk with that, and 
> it's stable.

Linux-aio is nice except that you can't easily complete network and disk 
requests simulateneously (no IO_CMD_POLL yet).  This means you need an 
additional thread.

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