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Subject: Re: [OMPI users] CPU burning in Wait state
From: Jeff Squyres (jsquyres_at_[hidden])
Date: 2008-09-03 04:39:43


On Sep 2, 2008, at 7:25 PM, Vincent Rotival wrote:

> I think I already read some comments on this issue, but I'd like to
> know of latest versions of OpenMPI have managed to solve it. I am
> now running 1.2.5
>
> If I run a MPI program with synchronization routines (e.g.
> MPI_barrier, MPI_bcast...), all threads waiting for data are still
> burning CPU. On the other hand when using non-blocking receives all
> threads waiting for data are not consuming any CPU.
>
> Would there be a possibility to use MPI_Bcast without burning CPU
> power ?

I'm afraid not at this time. We've talked about adding a blocking
mode for progress, but it hasn't happened yet (and is very unlikely to
happen for the v1.3 series).

-- 
Jeff Squyres
Cisco Systems