FC4 and xen0 performance

[Jeffrey Buell]

> On 5 Apr 2005, at 20:53, Jeffrey Buell wrote:
> 
> > I installed FC4 test1 and xen0 straight from Fedora and ran 
> some simple
> > kernel microbenchmarks (loops over getpid, fork/wait, signal, etc.) 
> > and the
> > results are pretty ugly compared to a 2.6.1 install. FC4 
> ranges from 
> > 1.5X to
> > 20X slower, while xen0 is about 2X to 6X slower.  Is this 
> expected? I'm
> > looking for configuration differences now, but I'm wondering if 
> > anybody can
> > comment on how FC4 and xen0 were built. debug? asserts? One 
> difference
> > between FC4 and xen0 is that FC4 was configured with 
> HIGHMEM and xen0 
> > wasn't.
> 
> Did you moved /lib/tls to /lib/tls.disabled?

Yes.  Also, xen0 is configured with SMP and FC4 wasn't.  My 2.6.1 has neither
SMP or HIGHMEM, but these things shouldn't have that much effect, or could
they?

Jeff