[mythtv-users] Re: Status of MythTV in 64bit-FC_land

[Jarod Wilson]

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
jarod at wilsonet.com

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