Re: netbsd-5 on Citrix XenClient 2.1 (on an HP EliteBook 8460p)

[Thor Lancelot Simon <tls%panix.com@localhost>]

On Mon, Feb 13, 2012 at 03:01:09PM +0100, Joerg Sonnenberger wrote:
> On Sun, Feb 12, 2012 at 05:17:01PM -0800, Greg A. Woods wrote:
> > One non-scientific observation was that systat both seemed to show a
> > large portion of CPU time was spent in the kernel (system time), and a
> > relatively small amount of CPU went to user-level, except perhaps when
> > the final sets tar files were being compressed.  I.e. it looked to me
> > quite different than when I had run the same build on the bare hardware.
> 
> That's not completely unexpected as Xen gives significantly higher
> system call and context switching overhead.

Also, his sources are on NFS, and he is not exactly using an efficient
network adapter driver -- PIO is particularly painful when virtualized.

Thor