Subject: Re: "blocked" domUs
To: None <port-xen@netbsd.org>
From: david l goodrich <dlg@dsrw.org>
List: port-xen
Date: 04/08/2007 23:19:10
--A6N2fC+uXW/VQSAv
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
Content-Transfer-Encoding: quoted-printable

On Fri, Apr 06, 2007 at 07:53:27PM -0500, david l goodrich wrote:
> On Wed, Apr 04, 2007 at 08:30:43PM -0500, david l goodrich wrote:
> > Performance of the domUs on my Pentium D 3ghz dom0 is pretty
> > poor - for example, ssh'ing from a domU occasionally just pauses
> > and cpu utilization on the domu goes down to 0.  No discernible
> > reason that I can see.
> >=20
>=20
> Even communication between domUs on this computer is affected by
> this.  AFS fileservers on this dom0 are nigh unusable, volume
> moves are failing left and right as the domUs simply stop
> processing.
>=20
> Does anyone have some insight into this?

Well, if no-one else does, I do.

Booting the computer in single-processor mode (disabling SMP and
ioapic and ACPI) solves the problem.

Good enough, I'm sick of dealing with it.

Clearly, NetBSD is not ready for prime-time when it comes to SMP.
  --david



--A6N2fC+uXW/VQSAv
Content-Type: application/pgp-signature
Content-Disposition: inline

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.6 (NetBSD)

iD8DBQFGGb69HDmo5jqnP4QRAuYgAKCHEHdN5beieFfJGsPIBq1YDwvQwgCfRiXN
WvJ/IEpokmmIMkIPD16kJdk=
=KL7y
-----END PGP SIGNATURE-----

--A6N2fC+uXW/VQSAv--