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Re: qemu success with -current

On Sat, Mar 05, 2011 at 04:12:14PM +0200, Antti Kantee wrote:
> [...]
> p.s. qemu-system-sparc takes a full CPU on the host regardless of
> guest load.  is that a bug or a feature?

It depends on the system you're emulating.
Some sparc CPUs don't have a idle instruction so the kernel just
spins waiting to have something to do.

The apc(4) driver should allow some sparc to go to sleep waiting for
the next interrupt; it's not enabled by default (it's reported that some
system hang trying to use it).

apc(4) works fine with the pkgsrc qemu emulating a SPARCstation 5, and
allows the qemu process to go idle when the guest is idle.

Manuel Bouyer <bouyer%antioche.eu.org@localhost>
     NetBSD: 26 ans d'experience feront toujours la difference

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