AMD64 Java requires linux?

thaumielx72 · #1 (**permalink**) 01-13-2008, 06:16 PM

Hello.

I have a Toshiba laptop with an AMD64 processer. I have Vista Home loaded on it right now. I wish to
run a CPU intensive program on it that does pure mathematical calcualtions and can, and has, run for over two days straight. I believe it will speed up somewhat with a 64 bit application.

My question is: Can I run 64 bit java under VISTA (a 32 bit OS) or do I have to, as I suspect, use a Linux flavor?

And if so, what Linux (downloadable) system should I use? I have managed to get openSUSE, Ubuntu, and Debian
(both stable and testing) up and running on the little guy.

I appreciate any help you can give me on the subject. Thanks in advance.

afsina · #2 (**permalink**) 01-13-2008, 07:59 PM

64 bit Java windows version is available. You will see the options once selecting the Windows as OS after following the links on that page.

However, i am not sure about the 64 bit java browser plug-in, that may be an issue. One the other side, i would not make my hopes so high about the performance gains for 64 bits.

thaumielx72 · #3 (**permalink**) 01-14-2008, 04:05 AM

Quote:

Originally Posted by afsina

64 bit Java windows version is available. You will see the options once selecting the Windows as OS after following the links on that page.

However, i am not sure about the 64 bit java browser plug-in, that may be an issue. One the other side, i would not make my hopes so high about the performance gains for 64 bits.

I'm sorry sir but my hopes are not too high. You are talking about the 64 bit chip emulating 32 bit applications. I am not. Saying that a 64 bit chip will not Rape 32 bit applications is precisely the same as saying that the Intel Pentium is pretty much the same as the old 8086 IBM PC.

In the next 5 years you will see what I'm talking about.

But thanks for responding. (If I sound a little overbearing please forgive me when I started using computers the only way to input or get output was paper tape.)

afsina · #4 (**permalink**) 01-14-2008, 02:27 PM

Hello,
if it would be another chip architecture, i would be more positive about 64 bit performance, but x86-64 is a little bit of a different issue. As far as i know they do not really emulate 32 bits technically, 32 bit applications run on x86-84 chips full speed because registers an instructions are designed that way. that is why MOST of the time, performance gains will not be more than %5-10 level. There are cases you may even get slower performance. for java, it is usually easy to test this because you can run both 32 and 64 bit versions and test AFAIK.
Also, No sir, you are not overbearing, and i am no newbie either