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Subject: Re: [OMPI devel] Dynamically Turning On and Off Memory Manager of Open MPI at Runtime??
From: Patrick Geoffray (patrick_at_[hidden])
Date: 2007-12-10 21:19:35


Hi Peter,

Peter Wong wrote:
> Open MPI defines its own malloc (by default), so malloc of glibc
> is not called.
>
> But, without calling malloc of glibc, the allocator of libhugetlbfs
> to back text and dynamic data by large pages, e.g., 16MB pages on
> POWER systems, is not used.

You could modify ptmalloc2 in OpenMPI to allocate Huge Pages directly.
It would be a nice feature.

Patrick