On Mon, 2005-10-10 at 14:20 +0800, Paolo Alexis Falcone wrote: > On 10/10/05, Miguel A Paraz <[EMAIL PROTECTED]> wrote: > > > My guess is - AMD64 is better on servers that have little chance of > > running 32-bit binaries? >
Unless you're doing a lot of double precision math on your workstation, you're not going to really need the 64bit processor anyway. Of course, aside from the fact that in the near future AMD might discontinue the 32bit processor line, then you have no choice when you upgrade. ;) I'd like AMD64 on my cluster nodes (preferrably the dual/quad core variants) since most of the cluster computing being done is math centric anyway and floating point operations are king. :) > They're good on both - as a 32-bit platform math computations are done > using the wide registers and not the horribly outdated x87, thus the > unintended, fortunate side effect of being faster. As a 64-bit > platform it effectively dispels the law of diminishing returns when > accessing more than 4GB of memory via PAE in current 32bit > architectures (I'm not sure if apps are still limited to 4GB of > addressable space in 32bit mode, as a 64bit machine should do away > with that). The catch though is you'd need more memory, as the > footprint's usually twice the size. > Isn't memory management being controlled by the Operating System? Last time I checked Linux still handles the total amount of memory addressable by processes running in the system. And the last time I checked, there was a 4GB limit still on a per-process basis. I dunno though about 64bit -- but this was true for 32bit. BTW, if you're talking about the address bus, you still have a 32 bit limit on the address bus, unless they come up with a 64 bit address bus. HTH -- Dean Michael C. Berris <[EMAIL PROTECTED]> GPG Key: 0x08AE6EAC http://mikhailberis.blogspot.com Mobile: +63 928 7291459
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