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g77 & RAM access
- From: Anuchit Aromsawa <g4136819 at student dot mahidol dot ac dot th>
- To: gcc at gcc dot gnu dot org
- Date: Wed, 22 Jan 2003 18:26:16 +0700 (ICT)
- Subject: g77 & RAM access
Hi,
What is the maximum physical memory (RAM) on PC
that g77 (or other fortran) can adrress?
Please correct me if I am wrong. For 32-bit fortran
compiler (g77 or others), there are 2^31 - 1 =
2,147,483,647 pointers or 2,147,483,647*8 =
17,179,869,176 byte of double precision.So 16 GB is
the answer,isn't it? However, the Linux 2.4.X provides
only 2.3GB - 3GB, the maximun of memory per single
process
(http://www.spack.org/index.cgi/LinuxRamLimits). It
means that g77 (or others) is reliable for less than 3GB
on PC-Linux system, doesn't it?
Anuchit Aromsawa
Student of Mathermatics
Mahidol University,
Thailand.
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