Re: qemu too slow ?

[Mayuresh <mayuresh%acm.org@localhost>]

On Sun, Jul 15, 2012 at 07:36:54PM +0100, David Brownlee wrote:
> On 14 July 2012 20:18, Mayuresh <mayuresh%acm.org@localhost> wrote:
> >
> > It's strange, though I find that if I do not put the qemu command in
> > background then it does not slow down as described above. It just blocks a
> > terminal that launched qemu, though runs at a decent speed.
> 
> Interesting... If you start normally in the shell then ^Z and bg does
> it suffer the slowdown at that point?

I checked: If I start with & up front, it doesn't slow down. But if I hit
Ctrl-Z bg after starting it, it starts slowing down.

Putting it back into foreground with fg is not found restoring the speed.

It's found to be repeatable.

I also noticed following message on terminal that may provide some hint:

udevadm settle - timeout of 5 s reached, the event queue contains:
/sys/module/squashfs (930)

I am running microcore Linux as guest and started the kernel with noapic
option to avoid the 8254 timer related bug.

Mayuresh