Re: 64-bit vs. 32-bit Computing

It probably has to do with the fact that Core Duo processors (and all
current "Core" branded products) are 32bit.

http://en.wikipedia.org/wiki/Intel_Core

The merom/conroe-based 64bit chips are expected sometime later this year.

Intel has done a good job of not explicitly stating that Core Duo and
Core Solo chips are 32bit, probably because of all the previous hype
about 64bit computing ala EM64T.

John

Jon Forrest wrote:
> There's no doubt that for certain applications the
> increased address space provided by a 64-bit computer
> is a good thing. But, there aren't that many of these
> applications.
>
> Now that the new 64-bit Intel Core Duo/Solo processors are
> out, and now that new AMD Athlons are all 64-bit, I'm
> wondering when and why people are running them in
> 64-bit mode other than for database applications.
>
> I just did a quick test on a new Dell server with a Core Duo
> and 1GB of RAM. I loaded Fedora Core 5 in 32-bit mode and
> timed a build of a fairly big app (subversion). I then loaded
> Fedora Core 5 in 64-bit mode on the same PC, and timed the
> same build. I think this is a reasonable test since
> it does a lot of both I/O and computation. The results weren't
> what I expected.
>
> It turned out that the build took 2 minutes of elapsed time
> in both cases. However, the 64-bit build took 12 seconds less
> of usermode time, and 12 seconds more of system time. Go
> figure.
>
> --
> Jon Forrest
> forrest@ce.berkeley.edu
> Computer Resources Manager
> Civil and Environmental Engineering Dept.
> 305 Davis Hall
> Univ. of Calif., Berkeley
> Berkeley, CA 94720-1710
> 510-642-0904
>
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Received on Thu Apr 13 00:10:29 2006