Re: [bgl-discuss] BGL compute node available memory

[Katherine M Riley <kmriley@xxxxxxxxxxxxxxxxxx>]

I've run malloc tests which indicate that I can get 508 MB before  
anything gets returned with a complaint.  I can rerun for the _exact_  
number, if you'd like.   But, as Andrew said, you can use very close  
to max.

-katherine

On Sep 20, 2005, at 4:35 PM, chad@xxxxxxxxxxx wrote:

> How much physical memory is available to a running process on a BGL
> compute node? I've searched google and the ML archive, but so far  
> all I've
> found is this:
>
> http://www-unix.mcs.anl.gov/~beckman/bluegene/SSW-Utah-2005/BGL- 
> SSW03-CNK-CIOD.pdf
>
> It shows that the CNK comprises four 256K pieces, and it also shows  
> the
> opposite end of memory being reserved for memory-mapped devices  
> (but not
> how much is reserved), with the application occupying the space in
> between.
>
> Mainly, I'm trying to figure out (at least roughly) how much scalar  
> data I
> could fit into a single compute node.
>
> Thanks,
> ccg
>
>
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