[mpich-discuss] Large memory allocations in MPI applications under Linux

[Sudarshan Raghunathan]

Thank you Pavan. I did consider this option, but unfortunately this is
not possible in a production system (normal users do not have root
access, we have to remember to turn it back on, etc. etc.). I am
wondering if something could be done at the application level because
it will then be much less difficult to deploy.

Regards,
Sudarshan

2009/4/15 Pavan Balaji <balaji at mcs.anl.gov>:
>
> One of the research groups that I have been working with had some problem
> with virtual address swapping as well. The solution they used was to run
> /sbin/swapoff, which essentially tells the OS to only use physical address
> space and return a NULL if there's no memory. They were using this to
> optimize their LINPACK performance, so they didn't really care if this
> returned a NULL pointer (for graceful termination) or just aborted the
> application. But you can try it.
>
>  -- Pavan