Re: [Qemu-devel] [4341] qemu: generate signals on tap I/O

[Anders]

Anthony Liguori wrote:
> You're seeing improvement with normal QEMU?  Can you please post a 
> description of what you're seeing improve with SIGIO.  SIGIO should 
> really only slow things down.
>   

I found this issue in KVM. I have not timed in QEMU, but the issue 
seemed generic, so I posted it upstream.

My usecase was a new VNC connection delaying until the next timer tick 
(which is a really long time in some KVM configurations).

The improvement is from running the select() immediately, rather than 
waiting around for a timer to expire.

Thanks,
Anders.