On Thursday, October 31, 2002, at 02:22 AM, Jeremy T. Fox wrote:

I tried to find the most memory I could allocate via Fortran (g77) and

I got 2.25GB (on a G4 with 512MB of physical memory). Does Mac OS X

have a limit of 2.25GB per process, or is this something strange with

Fortran and/or my machine?

For comparison, Windows has a limit of 2GB per process (tunable to 3GB

if you shell out for Advanced Server), while I believe the default on

Linux is 3GB, which can be upgraded to 3.5GB with the right patch. I

don't know about FreeBSD. Clearly 64-bit machines do not have this

type of limitation.

Jeremy, who hopes that one day Apple will support 1GB DIMMs :)

--------------------

Jeremy T. Fox

jerfox@stanford.edu

Each user process can have 4GB - 4K of VM address space. However you do not have a larger than 1.5GB "hole" in that address space. If g77 must work in "contiguous VM", I think 1.5GB is the limit you will have to work in. --Umesh -- Umesh Vaishampayan Apple Computer, Inc. Mac OS X Kernel Ph: (408) 974 0229 _______________________________________________ darwin-kernel mailing list | darwin-kernel@lists.apple.com Help/Unsubscribe/Archives: http://www.lists.apple.com/mailman/listinfo/darwin-kernel Do not post admin requests to the list. They will be ignored.