Open MPI logo

Open MPI User's Mailing List Archives

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

Subject: Re: [OMPI users] curious behavior during wait for broadcast: 100% cpu
From: Hicham Mouline (hicham_at_[hidden])
Date: 2010-12-09 15:37:57


> -----Original Message-----
> From: users-bounces_at_[hidden] [mailto:users-bounces_at_[hidden]] On
> Behalf Of Eugene Loh
> Sent: 08 December 2010 16:19
> To: Open MPI Users
> Subject: Re: [OMPI users] curious behavior during wait for broadcast:
> 100% cpu
>
> I wouldn't mind some clarification here. Would CPU usage really
> decrease, or would other processes simply have an easier time getting
> cycles? My impression of yield was that if there were no one to yield
> to, the "yielding" process would still go hard. Conversely, turning on
> "yield" would still show 100% cpu, but it would be easier for other
> processes to get time.
>
Any clarifications?