On Wed, 2005-07-06 at 18:12 -0700, Andrew Morton wrote:
> Dave Jones <[email protected]> wrote:
> >
> > On Wed, Jul 06, 2005 at 12:57:19PM -0700, David S. Miller wrote:
> > > From: Paulo Marques <[email protected]>
> > > Date: Wed, 06 Jul 2005 15:23:56 +0100
> > >
> > > > What is weird is that most of the extra time is being accounted as
> > > > user-space time, but the user-space application is exactly the same in
> > > > both runs, only the "randomize_va_space" parameter changed.
> > >
> > > It might be attributable to more cpu cache misses in userspace since
> > > the virtual addresses of everything are changing each and every
> > > invocation.
> >
> > On Transmeta CPUs that probably triggers a retranslation of
> > x86->native bytecode, if it thinks it hasn't seen code at that
> > address before.
> >
>
> ouch. What do we do? Default to off? Default to off on xmeta?
off-on-xmeta would be my preference; I'll cook up a patch for that.
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