lmw and stmw instructions not used copy functions

[Joakim Tjernlund]

> Joakim Tjernlund wrote:
>
> > Did some crude benchmarking using clear_page() as my test function.
>
> I'm sure someone has done it before.

I searched this list and the dev list using "lmw" as search key
and it didn't turn up anything relevant.

> What did you use for a benchmark program?

I hacked my own. I just executed clear_page() in userspace a few times
with and without lmw and measured time with gettimeofday(). Not a very
good test but since the difference is so big, I don't think futher tests
are needed.

> You should also be reading the linuxppc-dev
> list, as there are many things like this discussed there.  The
> embedded stuff is just a subset of the global PowerPC development.
> Paul (among many others) has documented many benchmark and optimization
> activities.

Where is this documented? I can't find much in the lists.

 Jocke


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