<html><head><style type="text/css"><!-- DIV {margin:0px;} --></style></head><body><div style="font-family:times new roman, new york, times, serif;font-size:12pt"><div style="font-family: times new roman,new york,times,serif; font-size: 12pt;">When I programmed in 16bit pc's there was a limit to the access of RAM. 32bit extended that and of course 64 goes even further, because now things are bigger. <br><br>You would have to restructure applications to take advantage of 64bit architecture. <br><br><br><br><div style="font-family: times new roman,new york,times,serif; font-size: 12pt;">----- Original Message ----<br>From: Aaron Kulkis <akulkis3@hotpop.com><br>To: MDLUG's Main discussion list <mdlug@mdlug.org><br>Sent: Wednesday, October 31, 2007 9:58:02 AM<br>Subject: Re: [mdlug] [Fwd: Re: [opensuse] 64 bit vrs 32 bit advantages speed etc.]<br><br>
David Lane wrote:<br>> The key to testing is the applications that exploit the 64bit chip.<br>> <br>> or handling a multi-tasked heavy load like what is the response from
a <br>> good sized data base query.<br>> <br>> The testing of adding the sums of the square roots from 1 to <br>> 1,000,000,000 is okay but what about rendering a movie and<br> > something else.<br>> <br>> <br><br>Right. This shows that, in a case like this (compiling)<br>which is not a fundamentally 64-bit task, there's no<br>real performance increase.<br><br>For the time being, if you're buying new equipment,<br>you're probably better off getting 32-bit hardware<br>at rock-bottom prices, because not only the software,<br>but that for most tasks being done today, the nature<br>of the problem being solved is still usually 32-bit<br>or even less.<br><br>> ----- Original Message ----<br>> From: Aaron Kulkis <<a ymailto="mailto:akulkis3@hotpop.com" href="mailto:akulkis3@hotpop.com">akulkis3@hotpop.com</a>><br>> To: "<a ymailto="mailto:mdlug@mdlug.org" href="mailto:mdlug@mdlug.org">mdlug@mdlug.org</a>" <<a
ymailto="mailto:mdlug@mdlug.org" href="mailto:mdlug@mdlug.org">mdlug@mdlug.org</a>><br>> Sent: Tuesday, October 30, 2007 3:09:34 PM<br>> Subject: [mdlug] [Fwd: Re: [opensuse] 64 bit vrs 32 bit advantages
speed <br>> etc.]<br>> <br>> <br>> <br>> -------- Original Message --------<br>> Subject: Re: [opensuse] 64 bit vrs 32 bit advantages speed etc.<br>> Date: Tue, 30 Oct 2007 14:42:23 -0400<br>> From: Buddy Coffey <<a ymailto="mailto:bcoffey@XXXXX.XXXX" href="mailto:bcoffey@XXXXX.XXXX">bcoffey@XXXXX.XXXX</a> <mailto:<a ymailto="mailto:bcoffey@XXXXX.XXXX" href="mailto:bcoffey@XXXXX.XXXX">bcoffey@XXXXX.XXXX</a>>><br>> To: <a ymailto="mailto:opensuse@opensuse.org" href="mailto:opensuse@opensuse.org">opensuse@opensuse.org</a> <mailto:<a ymailto="mailto:opensuse@opensuse.org" href="mailto:opensuse@opensuse.org">opensuse@opensuse.org</a>><br>> <br>> <br>> >>> Has anyone run benchmarks on an identical system with 32 bit vrs
64 <br>> bit?<br>> >>><br>> >>> <br>> Here is a benchmark of 32 bit vs 64 bit openSuSE 10.3 on a Core 2 Duo<br>> system.<br>> <br>> I have both 32 bit and 64 bit versions installed in separate
partitions<br>> on the same system with all updates applied.<br>> <br>> I ran my computationally intensive code GEMACS
(<a href="http://www.gemacs.com" target="_blank">http://www.gemacs.com</a>)<br>> compiled natively for both 32 and 64 bits with the Intel 9.1
compilers.<br>> The code performs little I/O and zero graphics. The code is<br>> multi-threaded and fairly well balanced, hence, the total CPU numbers<br>> are about 2X the elapsed time numbers.<br>> <br>> 64 bit:<br>> Elapsed time: 59.316 sec<br>> Total CPU time: 112.43 sec<br>> <br>> 32 bit:<br>> Elapsed time: 59.749 sec<br>> Total CPU time: 105.67 sec<br>> <br>> <br>> I would be glad to run other comparisons if anyone would like them.<br>> <br>> Buddy Coffey<br>> Applied Research Associates<br>> Computational and Applied Electromagnetics<br>> <br>> <br>> _______________________________________________<br>> mdlug mailing list<br>> <a ymailto="mailto:mdlug@mdlug.org" href="mailto:mdlug@mdlug.org">mdlug@mdlug.org</a> <mailto:<a ymailto="mailto:mdlug@mdlug.org" href="mailto:mdlug@mdlug.org">mdlug@mdlug.org</a>><br>> <a
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