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Subject: Re: [OMPI users] 1.7.1 Hang with MPI_THREAD_MULTIPLE set
From: Jeff Squyres (jsquyres) (jsquyres_at_[hidden])
Date: 2013-06-04 15:39:51

On Jun 4, 2013, at 8:20 AM, W Spector <w6ws_at_[hidden]> wrote:

>> Yes, this is true -- MPI_THREAD_MULITPLE support is fairly incomplete in Open MPI.
> One would hope a simple MPI_Barrier call would work though...

Underneath, I am pretty sure that barrier is doing an MPI_WAITALL.

Nathan actually just agreed to look at this bug today.

> My home linux system is nothing sophisticated. Just a quad core I-5 on a Intel DP55WB motherboard and Ubuntu Linux. No fancy interconnects.

I'm guessing it's a double lock of some kind (i.e., a coding error in OMPI); not related to your network.

Jeff Squyres
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