[Asterisk-Users] Performance differences 64-bit vs 32-bit

[Richard Scobie]

Morgan Gilroy wrote:
> As far as I know there will be no difference.
> 32bit runs natively on AMD64 chips.
> 
> The only advantage of 64bit is the extra address space and huge integers
> :)
> 
> But I could be wrong, iv not done any benchmarking myself just what i
> have read on the net.

I have no idea if Asterisk gains a significant advantage on 64bits v 32, 
but thought I would respond to the commonly perpetuated statement that, 
"The only advantage of 64bit is the extra address space and huge integers"

The x86 Instruction Set architecture allows for 8 general purpose 
registers.

The x86_64 ISA allows for 16, somewhat more flexible ones.

The potential here is for software that can effectively utilise the 
extra ones, will gain some benefit.

See http://www.techreport.com/reviews/2005q1/64-bits/index.x?pg=2 for 
more information.

Regards,

Richard