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Subject: Re: [OMPI users] testsome returns negative indices [diagnosis]
From: Jeff Squyres (jsquyres) (jsquyres_at_[hidden])
Date: 2014-03-21 16:31:21


On Mar 21, 2014, at 4:13 PM, Ross Boylan <ross_at_[hidden]> wrote:

> There was a problem in the R code that cause MPI_Request objects to be reused before the original request completed.
> Things are working much better now, though some bugs remain (not necessarily related to MPI_Isend or Testsome).
>
> Just for the record, isend in Rmpi is unreliable because the objects being sent are subject to garbage collection (by R) before the send completes. I am working on modifications to Rmpi to fix that.

Cool.

>> What should the integer size be for MPI on 64 bit architectures, specifically linux gcc (Debian 4.4.5-8) 4.4.5?
> I think it's still 32 bits and the problems were elsewhere.

It'll be whatever C defines an "int" to be. It's usually 32 bits, even for 64 bit applications.

-- 
Jeff Squyres
jsquyres_at_[hidden]
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