Wesley PA4WDH [pa4...@yahoo.com] wrote:
> 
> I just received my 6501 and i don't have any disks yet. However, i'm able to 
> boot into 32bit 64bit linux kernels and i'm able to enable/disable SMP.
> The kernel version will be 2.6.37 with some Gentoo patches.
> 
> Since i can't yet use it for what i planned to do with it i'm happy to do 
> some performance testing. Anything that doesn't take too much disk space or 
> requires installation of additional packages is possible. Just keep in mind 
> that whatever i boot, userspace will always be 32bit. If it's really 
> nescessary i can see if i can change that but i rather not.
> 
> Any test suggestions ?
> 

There is no advantage to 64bit on this box unless forward-looking binary 
compatibility is on your list. Some Linux distros are only coming in 64bit 
flavors now.

The pointers are twice as long, 64bit applications tend to be larger, use more 
memory, and have more data to move around so 64bit mode can actually be slower. 
There are features to potentially make 64bit mode faster like the extra 
registers but the automatic register remapping happens in 32bit mode, too.
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