[mdlug] [Fwd: Re: [opensuse] 64 bit vrs 32 bit advantages speed etc.]

[Aaron Kulkis]

-------- Original Message --------
Subject: Re: [opensuse] 64 bit vrs 32 bit advantages speed etc.
Date: Tue, 30 Oct 2007 14:42:23 -0400
From: Buddy Coffey <bcoffey at XXXXX.XXXX>
To: opensuse at opensuse.org


>>> Has anyone run benchmarks on an identical system with 32 bit vrs 64 bit?
>>>
>>>       
Here is a benchmark of 32 bit vs 64 bit openSuSE 10.3 on a Core 2 Duo
system.

I have both 32 bit and 64 bit versions installed in separate partitions
on the same system with all updates applied.

I ran my computationally intensive code GEMACS (http://www.gemacs.com)
compiled natively for both 32 and 64 bits with the Intel 9.1 compilers.
The code performs little I/O and zero graphics.  The code is
multi-threaded and fairly well balanced, hence, the total CPU numbers
are about 2X the elapsed time numbers.

64 bit:
   Elapsed time:  59.316 sec
   Total CPU time: 112.43 sec

32 bit:
    Elapsed time: 59.749 sec
    Total CPU time: 105.67 sec


I would be glad to run other comparisons if anyone would like them.

Buddy Coffey
Applied Research Associates
Computational and Applied Electromagnetics