topic Re: 3GB in Windows-XP in Intel® Fortran Compiler

3GB in Windows-XP

shenhawju — Thu, 26 Jun 2003 15:23:50 GMT

I have tested a Fortran program that can use 3GB RAM in Windows-XP. However, we need to allocate several arrays for the 3GB RAM, and the maximum array has about 1.8 GB. To give 3GB RAM to only one array will produce error. The procedures are:

(1) Change the root system file boot to the following form (change 2gb to 3gb):

[boot loader]
timeout=30
default=multi(0)disk(0)rdisk(0)partition(1)WINDOWS
[operating systems]
multi(0)disk(0)rdisk(0)partition(1)WINDOWS="Microsoft Windows XP Professional" /3gb /fastdetect

(2) Link the Fortran program using LARGEADDRESSAWARE function.

Re: 3GB in Windows-XP

kostastse — Sun, 11 Sep 2005 19:15:13 GMT

How can someone implement the second step you're mentioning in a Windows XP pro system with IVF 8, in order to be able to allocate 3 GB of memory in a program?

I have already set the swap file @ 4096MB and included the /3GB switch @ boot.ini file.

Re: 3GB in Windows-XP

Steven_L_Intel1 — Mon, 12 Sep 2005 00:32:56 GMT

You have to use dynamic allocation to go beyond 2GB.

Re: 3GB in Windows-XP

kostastse — Mon, 12 Sep 2005 01:12:43 GMT

Ok.

But how will I be able to link the Fortran program using the LARGEADDRESSAWARE function, as mentioned to the first post.

I searched, but couldn't find any clear instructions.

Kostas

Re: 3GB in Windows-XP

Steven_L_Intel1 — Mon, 12 Sep 2005 04:02:03 GMT

Go to the project properties, linker page, command line, type in /largeaddressaware.

Re: 3GB in Windows-XP

kostastse — Tue, 13 Sep 2005 09:17:28 GMT

Thanks a lot for your reply. It worked eventually! I managed to allocate about 2.5GB of virtual memory on IVF 8.

I have another question now about single array memory allocation limit in 64-bit systems, but I'll post it in a new topic, just for referencing purposes.

Kostas