[RC5] OGR: 32 vs 64bit

Kashani kashani at enteract.com
Fri Feb 18 16:55:37 EST 2000


As I understand it, Alpha NT is 32 bit because of OS limitations, which 
will directly affect any software running on it. Or can you run 64 bit code 
on a 32 bit OS on a 64 bit chip? :)

Kashani

At 10:48 AM 2/18/00 -0600, you wrote:
>At least on the alpha NT code it does not seem to be taking advantage of 64
>bit processing.  On my PIII 500 I get about 2.7 Gnodes in benchmarking, and
>on my Alpha 433 running NT I get about 2.1 Gnodes.  I was hoping it would
>scream on the Alpha like the DES contest did, but it seems to run about the
>same as an Intel box.
>
>Maybe there are more optimizations to come? :)
>
>-----Original Message-----
>From: Chris Frost [mailto:chris at frostnet.net]
>Sent: Wednesday, February 16, 2000 8:17 PM
>To: rc5 at lists.distributed.net
>Subject: [RC5] OGR: 32 vs 64bit
>
>
>I have read that 64bit versions of the ogr client are quite a bit faster
>than the 32bit (at least the previous group on aol's code, on which the
>dnetc core is based).
>
>Anyway, is the Irix n32 core 64bit? I thought that n32 was n64, except
>with 32bit pointers. This must be wrong though, as there is also an Irix
>n64 client, and I don't think dnetc has to worry about accessing more than
>a couple gigs of ram.
>
>thanks for any enlightenment!
>--
>Chris Frost  |  <http://www.frostnet.net/chris/>
>-------------+----------------------------------
>Public PGP Key:
>    Email chris at frostnet.net with the subject "retrieve pgp key"
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>
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