On Thursday 28 April 2005 17:15, Axel Thimm wrote: > On Thu, Apr 28, 2005 at 05:09:22PM -0700, Brad Fuller wrote: > > Axel Thimm wrote: > > >On Wed, Apr 27, 2005 at 08:36:18AM -0700, Brad Fuller wrote: > > >>Axel Thimm wrote: > > >>>You do loose some performance currently due to MMX not working under > > >>>64 bits. > > >> > > >>Really? Are you refering to the sw part taking advantage of the HW? I > > >>haven't heard of any chip issues. > > > > > >It doesn*t build w/o turning off MMX. > > > > Well.. crummy! Why is that? (should I ask in the devel forum?) > > > > Does anyone have benchmarks, or even off the top of your head knowledge, > > on the performance difference w/o MMX on 64-bit vs. w/MMX on 32-bit. > > There have been some posts on this, check out the archives.
There's been some patches flying about in current CVS, I plan to try some
stuff out and get dtk some feedback...
> > For mythtv, is having MMX a decided "got-to-have"feature for
> > performance?
>
> It depends. If you have a 64 bit platform chances are that you have
> enough power to do well w/o MMX support.
My Athlon 64 3500+ box plays back 720p and 1080i streams w/deint filter just
fine.
--
Jarod Wilson
[EMAIL PROTECTED]
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