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

Marcelo Tosatti
2008-04-14T17:24:47Z

On Mon, Apr 14, 2008 at 07:24:06PM +0300, Avi Kivity wrote:
> >Issue is that the dumb console timer "wakes up" the vcpu to do IO
> >processing in main_loop_wait().
> >
> >So while you're right that vga_hw_update() is a no-op for the -nographic
> >case, the indirect effect of the timer triggering main_loop_wait() is
> >needed for reading input from stdio in a way that feels interactive for
> >the user.
> >
> >
>
> Why not enable SIGIO on stdio input, like the rest of the fd handling in
> qemu?

Thats a possibility, but I think we've now agreed that doing select() with a
timeout is cleaner and possibly half a cent faster.