Re: [OMPI users] MPI_Allreduce on local machine

2010-07-27 Thread Anton Shterenlikht
95 -L/usr/local/lib tmp.f90 % ./a.out 8 % Kind 8 is (on most arch) 8-byte real, i.e. typically double precision. -- Anton Shterenlikht Room 2.6, Queen's Building Mech Eng Dept Bristol University University Walk, Bristol BS8 1TR, UK Tel: +44 (0)117 331 5944 Fax: +44 (0)117 929 4423

[OMPI users] does OpenMPI 1.3.2 support MPI 2.2 standard?

2010-07-20 Thread Anton Shterenlikht
Hi Does OpenMPI 1.3.2 support MPI 2.2 standard? I didn't get a clear answer from our sysadmin. many thanks anton -- Anton Shterenlikht Room 2.6, Queen's Building Mech Eng Dept Bristol University University Walk, Bristol BS8 1TR, UK Tel: +44 (0)117 331 5944 Fax: +44 (0)117 929 4423

Re: [OMPI users] is loop unrolling safe for MPI logic?

2010-07-18 Thread Anton Shterenlikht
On Sat, Jul 17, 2010 at 09:14:11AM -0700, Eugene Loh wrote: > Jeff Squyres wrote: > > >On Jul 17, 2010, at 4:22 AM, Anton Shterenlikht wrote: > > > > > >>Is loop vectorisation/unrolling safe for MPI logic? > >>I presume it is, but are there situati

Re: [OMPI users] is loop unrolling safe for MPI logic?

2010-07-17 Thread Anton Shterenlikht
On Sat, Jul 17, 2010 at 07:50:30AM -0400, Jeff Squyres wrote: > On Jul 17, 2010, at 4:22 AM, Anton Shterenlikht wrote: > > > Is loop vectorisation/unrolling safe for MPI logic? > > I presume it is, but are there situations where > > loop vectorisation could e.g. violate th

Re: [OMPI users] do all processors have to execute MPI_Bcast?

2010-07-17 Thread Anton Shterenlikht
On Sat, Jul 17, 2010 at 07:49:21AM -0400, Jeff Squyres wrote: > On Jul 17, 2010, at 4:13 AM, Anton Shterenlikht wrote: > > > Sorry, just to be absolutely clear, are you saying > > that even though only one process in the communicator > > is calling Bcast, the

[OMPI users] is loop unrolling safe for MPI logic?

2010-07-17 Thread Anton Shterenlikht
1) remark: LOOP WAS VECTORIZED. p-grains1.f90(250): (col. 35) remark: LOOP WAS VECTORIZED. Is loop vectorisation/unrolling safe for MPI logic? I presume it is, but are there situations where loop vectorisation could e.g. violate the order of execution of MPI calls? many thanks anton -- Anton Sh

Re: [OMPI users] do all processors have to execute MPI_Bcast?

2010-07-17 Thread Anton Shterenlikht
On Fri, Jul 16, 2010 at 05:20:53PM -0400, Prentice Bisbal wrote: > > > Eugene Loh wrote: > > Anton Shterenlikht wrote: > > > >> Will this bit of code work: > >> > >> if (rank .eq. ) then > >> > >> *chan

[OMPI users] do all processors have to execute MPI_Bcast?

2010-07-16 Thread Anton Shterenlikht
esses, similar to MPI_Barrier. Is this correct? many thanks anton -- Anton Shterenlikht Room 2.6, Queen's Building Mech Eng Dept Bristol University University Walk, Bristol BS8 1TR, UK Tel: +44 (0)117 331 5944 Fax: +44 (0)117 929 4423

Re: [OMPI users] ipath_userinit: userinit command failed: Cannot allocate memory

2010-07-09 Thread Anton Shterenlikht
real0m1.590s user0m0.070s sys 0m0.182s bigblue3> I'll ask my sysadmin about this. As I'm just starting MPI, I was worried I messed up something in my MPI program. This seems ok now. Many thanks for your help. anton > > Avneesh > > -Original Messa

[OMPI users] ipath_userinit: userinit command failed: Cannot allocate memory

2010-07-08 Thread Anton Shterenlikht
n failure on /dev/ipath where u02n065 is the node name. Please advise many thanks anton -- Anton Shterenlikht Room 2.6, Queen's Building Mech Eng Dept Bristol University University Walk, Bristol BS8 1TR, UK Tel: +44 (0)117 331 5944 Fax: +44 (0)117 929 4423