[Beowulf] MS HPC... Oh dear...
jcownie at cantab.net
Tue Jun 13 12:53:48 PDT 2006
On 12 Jun 2006, at 15:49, Joe Landman wrote:
> Ashley Pittman wrote:
>> On Mon, 2006-06-12 at 00:02 -0400, Joe Landman wrote:
>>> What Microsoft will do is to take away as much of this as they
>>> can. I
>>> haven't seen it yet, but I believe they will offer MPICH as a
>>> DLL, so if
>>> PathScale wants to work along side some other device, you can select
>>> this at runtime, and just have it work. This is a nice idea.
>> Perhaps I've missed something here, what do windows DLLs provide
>> that a
>> linux .so doesn't?
> Nothing. Unfortunately most folks use statically linked binaries for
> MPI, so .so's are not a factor. I could be wrong, and maybe there
> is a
> way to get statically linked binaries to respect LD_PRELOAD or
> LD_LIBRARY_PATH, but I am not aware of it.
> More to the point, this dynamic binding allows you to write to the
> present a consistent ABI, and handle the hardware details elsewhere
> in a
> driver which can be linked in by the .so/.dll/.eieio method at
> Which is about the complexity that most end users/customers want.
As I understand it this is what Intel's MPI (for LInux) does, so that
you can choose the underlying hardware transport without relinking
(FWIW I work for Intel, but not on MPI, and I certainly don't speak
for them ;-)
James Cownie <jcownie at cantab.net>
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