On Sat, Sep 06, 2003 at 11:20:11PM +1000, Paul Mackerras wrote:
>
> Eugene Surovegin writes:
> > I think we should disable prefetch if CONFIG_NONCOHERENT_CACHE is defined.
> > Other more complex solutions are possible, e.g. we can still prefetch our
> > own buffer but don't touch anything outside
At 06:20 AM 9/6/2003, Paul Mackerras wrote:
> > I think we should disable prefetch if CONFIG_NONCOHERENT_CACHE is defined.
> > Other more complex solutions are possible, e.g. we can still prefetch our
> > own buffer but don't touch anything outside (I'll try to do some
> > performance testing to d
Eugene Surovegin writes:
> There are read prefetch optimization in several PPC specific functions
> responsible for copying memory (copy_page, __copy_tofrom_user). Current
> implementations will try to prefetch up to 4 (MAX_COPY_PREFETCH) cache
> lines _after_ the end of the source buffer.
>
> Un
Hi all!
There are read prefetch optimization in several PPC specific functions
responsible for copying memory (copy_page, __copy_tofrom_user). Current
implementations will try to prefetch up to 4 (MAX_COPY_PREFETCH) cache
lines _after_ the end of the source buffer.
Unfortunately, it's not a good
