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

[Axel Thimm]

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.

> 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.
-- 
Axel.Thimm at ATrpms.net
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