Open MPI logo

Open MPI User's Mailing List Archives

  |   Home   |   Support   |   FAQ   |   all Open MPI User's mailing list

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
jsquyres_at_[hidden]
For corporate legal information go to: http://www.cisco.com/web/about/doing_business/legal/cri/