[MPlayer-dev-eng] Cache optimized rotation.
Reimar.Doeffinger at stud.uni-karlsruhe.de
Tue Apr 10 14:21:07 CEST 2007
On Tue, Apr 10, 2007 at 01:33:50PM +0200, David Bateman wrote:
> On 4/10/07, Reimar Döffinger <Reimar.Doeffinger at stud.uni-karlsruhe.de>
> > Well, the simplest solution that works well enough is always preferred.
> > The second patch can probably be also better optimized of there are
> > streaming write instruction available that bypass the cache, the first
> > version there would have more cache trashing due to the block.
> I don't think the first solution should thrash the cache as the tile size
> can be selected to fit entirely within one cache line
It does to some level, since both with or without write instructions
that bypass the cache, additional space will be needed for this block.
It probably does not matter much and the second solution has other cache
problems, but still.
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