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Subject: Re: [OMPI devel] RFC: convert send to ssend
From: Jeff Squyres (jsquyres_at_[hidden])
Date: 2009-08-24 15:30:23


On Aug 24, 2009, at 2:26 PM, George Bosilca wrote:

> > My point is that this is a fairly trivial-to-implement feature. It
> > can even be done in a way that doesn't impact performance at all
> > (default to compile out).
>
> It is more trivial than this: mpirun -np 2 --mca
> btl_tcp_rndv_eager_limit 0 --mca btl_tcp_eager_limit 72 --bynode ./
> NPmpi ?
>

You would have a user do that rather than

    mpirun --mca mpi_force_ssend 1 -np 2 --bynode ./NPmpi

?

I'm an OMPI implementor and I'll never remember that the TCP BTL
requires *2* eager limits, much less what their values are. :-)

-- 
Jeff Squyres
jsquyres_at_[hidden]