Re: qemu too slow ?

[David Brownlee <abs%netbsd.org@localhost>]

On 14 July 2012 18:22, Mayuresh <mayuresh%acm.org@localhost> wrote:
> I find emulators/qemu (1.1 which is fairly recent) to be too slow on
> NetBSD 6.0 BETA 2 on i386 with virtualization support enabled in the BIOS.
>
> I am trying microcore linux as guest, which is the only system I am able
> to boot with among 3/4 distros attempted. (Gentoo booted as well though
> was too slow to be useful.)
>
> The command I run is something like this:
>
> qemu-system-i386 -m 1024 -hda <img> -cdrom <microcore iso>
>
> Sometimes it starts fast though slows down slowly, to such an extent that
> a typed key takes 3/4 or more seconds to appear in guest OS terminal.
>
> What could be the reasons? Are there any aspects that can be examined?
>
> Is qemu being used reliably with NetBSD as host by anyone? If yes, what
> guest OS is it?

I've used it with WinXP for testing webpages in IE6 7 & 8. I've not
noticed any particular performance issues.

All of my Linux-VM requirements are very much satisfied by running
Xen, though that is on a server box so I've never had need to run X on
the DOM0.

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?