Re: memory usage of code compiled with gcc 3.2

[hektor monteiro x285 <hmonteiro at ctio dot noao dot edu>]

Hello everyone,

I think I found a solution for the problem. Somewhere on the web I found 
that if you compile the code with the flag ¨-static¨ it works, and it 
did (apparently!).

hektor

LLeweLLyn Reese wrote:

> hektor monteiro x285 <hmonteiro@ctio.noao.edu> writes:
>
> > Hi everyone! I am working with an astrophysical code that uses a lot
> > of memory (RAM). Basically because of a 3D matrix that I have to
> > define. I was working with 1G  of RAM before and could run the code
> > with a cube of 70^3 cells. Recently I bought a new super machine with
> > 4g of RAM and I am using the gcc 3.2 compiler on linux redhat 7.3. But
> > I am not able to run more than 70^3 cells on this. Can anyone give me
> > some clue?? I would think I should be able to do better no? Is this a
> > linux kernel limitation or gcc or something else??
> by default, linux kernels are built to address a max of 2G. If you
>    rebuild your kernel, you can change this options to allow 4G or
>    70T (virtual, not physical). I think this still leaves individual
>    processes limited to 2G, but at least other programs running at
>    the same time will not be biting into that.