Re: [OMPI users] spin-wait backoff

2010-09-02 Thread Douglas Guptill
Hi David: On Fri, Sep 03, 2010 at 10:50:02AM +1000, David Singleton wrote: > > I'm sure this has been discussed before but having watched hundreds of > thousands of cpuhrs being wasted by difficult-to-detect hung jobs, I'd > be keen to know why there isn't some sort of "spin-wait backoff" option.

[OMPI users] spin-wait backoff

2010-09-02 Thread David Singleton
I'm sure this has been discussed before but having watched hundreds of thousands of cpuhrs being wasted by difficult-to-detect hung jobs, I'd be keen to know why there isn't some sort of "spin-wait backoff" option. For example, a way to specify spin-wait for x seconds/cycles/iterations then backo

Re: [OMPI users] simplest way to check message queues

2010-09-02 Thread Ashley Pittman
On 1 Sep 2010, at 23:32, Jaison Mulerikkal wrote: > Hi, > > I am getting interested in this thread. > > I'm looking for some solutions, where I can redirect a task/message > (MPI_send) to a particular process (say rank 1), which is in a queue (at rank > 1) to another process (say rank 2), if t

Re: [OMPI users] simplest way to check message queues

2010-09-02 Thread Ashley Pittman
On 2 Sep 2010, at 15:56, Brock Palen wrote: > Ashly still having trouble using padb with openmpi/1.4.2 > > [dianawon@nyx0862 ~]$ /home/software/rhel5/padb/3.0/padb -a -Q > [nyx0862.engin.umich.edu:30717] [[16608,0],0]-[[25542,0],0] oob-tcp: > Communication retries exceeded. Can not communicate

Re: [OMPI users] simplest way to check message queues

2010-09-02 Thread Brock Palen
Ashly still having trouble using padb with openmpi/1.4.2 [dianawon@nyx0862 ~]$ /home/software/rhel5/padb/3.0/padb -a -Q [nyx0862.engin.umich.edu:30717] [[16608,0],0]-[[25542,0],0] oob-tcp: Communication retries exceeded. Can not communicate with peer [nyx0862.engin.umich.edu:30717] [[16608,0],0]

Re: [OMPI users] simplest way to check message queues

2010-09-02 Thread Brock Palen
Ah ok, I put it there just because the user couldn't read that from my home space, and never even thought of that. gahhh. Thanks, BTW I tried joining the padb mailing list. Brock Palen www.umich.edu/~brockp Center for Advanced Computing bro...@umich.edu (734)936-1985 On Sep 1, 2010, at 6:11

Re: [OMPI users] Problem including C MPI code from C++ using C linkage

2010-09-02 Thread Jeff Squyres
On Aug 31, 2010, at 5:39 PM, Patrik Jonsson wrote: > It seems a bit presumptuous of mpi.h to just include mpicxx.h just > because __cplusplus is defined, since that makes it impossible to link > C MPI code from C++. The MPI standard requires that work in both C and C++ applications. It also re