HEAD UP acpi/mpbios/ioapic support commited

Hi Manuel,

On Wednesday 11 October 2006 19:05, Manuel Bouyer wrote:
> On Mon, Oct 09, 2006 at 08:28:49AM +1000, Sarton
O'Brien wrote:
> > On Saturday 07 October 2006 16:57, you wrote:
> > > > I tested with SMP and NFS under load
would fall over.
> > >
> > > How ?
> >
> > There wasn't any obvious error generated. A dd
from a mounted NFS to a
> > local FS caused the NFS server to stop servicing
_all_ requests. I
> > haven't had a chance to switch back to SMP and try
and see if I can
> > generate an error yet, but I will let you know
when I do.
>
> Is the NFS server on the same Xen hardware ? If not,
I'm not sure we can
> blame Xen/SMP for this. If it's on the same Xen, please
check if the
> network if completely dead, or if it's just NFS.

I've since had a chance to switch back to SMP and it appears
my problem was 
more than likely with the hungry memory usage of NFS. I
don't know why it was 
only prevalent under SMP but with additional RAM it is now
OK (this is an 
assumption, I did replace all Xen kernels while I had the
system down so 
maybe there was a cvs checkout that fixed it). The main
thing is that it 
doesn't seem to be a problem anymore.

I'm curious though, what are the typical or at least the
highest transfer 
speeds you would expect from one DOMU to another via NFS?

Anyone feel free to comment.

Sarton

On Thu, Oct 19, 2006 at 05:23:28PM +1000, Sarton O'Brien
wrote:
> I've since had a chance to switch back to SMP and it
appears my problem was 
> more than likely with the hungry memory usage of NFS. I
don't know why it was 
> only prevalent under SMP but with additional RAM it is
now OK (this is an 
> assumption, I did replace all Xen kernels while I had
the system down so 
> maybe there was a cvs checkout that fixed it). The main
thing is that it 
> doesn't seem to be a problem anymore.

If it's recent current sources it's possible that I fixed
it.

> 
> I'm curious though, what are the typical or at least
the highest transfer 
> speeds you would expect from one DOMU to another via
NFS?

I've not especilly tested NFS, but with ttcp I get about
60MB/s between dom0
and a domU, on a SMP Xeon system. Maybe impleenting some
kind of fake hardware
checkum could help a bit here ...

-- 
Manuel Bouyer, LIP6, Universite Paris VI.          
Manuel.Bouyerlip6.fr
     NetBSD: 26 ans d'experience feront toujours la
difference
--

On Thu, Oct 19, 2006 at 05:23:28PM +1000, Sarton O'Brien
wrote:
> I've since had a chance to switch back to SMP and it
appears my problem was 
> more than likely with the hungry memory usage of NFS. I
don't know why it was 
> only prevalent under SMP but with additional RAM it is
now OK (this is an 
> assumption, I did replace all Xen kernels while I had
the system down so 
> maybe there was a cvs checkout that fixed it). The main
thing is that it 
> doesn't seem to be a problem anymore.

If it's recent current sources it's possible that I fixed
it.

> 
> I'm curious though, what are the typical or at least
the highest transfer 
> speeds you would expect from one DOMU to another via
NFS?

I've not especilly tested NFS, but with ttcp I get about
60MB/s between dom0
and a domU, on a SMP Xeon system. Maybe impleenting some
kind of fake hardware
checkum could help a bit here ...

-- 
Manuel Bouyer, LIP6, Universite Paris VI.          
Manuel.Bouyerlip6.fr
     NetBSD: 26 ans d'experience feront toujours la
difference
--