[mythtv-users] Gentoo 64bit and MythTV completely compatible?

[Brian Wood]

On Jan 27, 2007, at 12:14 PM, Rod Smith wrote:

>
> Have such inefficiencies in the 64-bit implementations of these  
> tools been
> eliminated in the intervening time? I'm currently running a 32-bit  
> Ubuntu
> installation on my 64-bit-capable Celeron D system, but if there  
> won't be any
> speed hit to running a 64-bit OS, I'll consider using one when it  
> comes time
> to do software upgrades. Although the speed benefits are small  
> (about 5-20%
> for most programs), x86_64 code can be a little faster than x86  
> code on the
> same CPU, all other things being equal.

I think that, at least a couple of months ago, the consensus was that  
there is nothing to be gained on a Myth system by running in 64-bit  
mode.

You have mentioned some of the reasons, code well optimized for 32- 
bit, compilers not well optimized for 64-bit etc.

It certainly couldn't hurt to try though, but I wouldn't expect any  
great performance gains and, as you said, some applications might  
even run slower.

If you could do actual real-world comparisons we'd all appreciate it  
I'm sure.

It's hard for me to believe that I still run into some of the same 64- 
bit issues that I ran into on a DEC Alpha system a dozen years ago,  
it's not like 64-bit is new.