[Pixman] add enable-cache-prefetch option
xinyun.liu at intel.com
Tue Sep 21 09:15:10 PDT 2010
OK. here is the work to clear all cache prefetch. Please review it. 3x
On Tue, Sep 21, 2010 at 11:36:30PM +0800, Soeren Sandmann wrote:
> Liu Xinyun <xinyun.liu at intel.com> writes:
> > This patch is to add a new configuration option: enable-cache-prefetch,
> > which is default yes.
> > Here is a link which talks on cache issue.
> > http://lists.freedesktop.org/archives/pixman/2010-June/000218.html
> > When disable it on Atom CPU(configured with --enable-cache-prefetch=no),
> > it will have a little performance gain. Here is the patch.
> I think the cache prefetch code should just be deleted outright. No
> benchmarks that I'm aware of show it to be an improvement.
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