Re: [OMPI users] Allgather in inter-communicator bug,

On May 20, 2010, at 2:52 PM, Lisandro Dalcin wrote: > Jeff, you should really learn Python and give a try to mpi4py. Even if > you do not consider Python a language for serious, production work > :-), it would be a VERY productive one for writing tests targeting > MPI. Freely admitted laziness

Re: [OMPI users] Allgather in inter-communicator bug,

On 20 May 2010 11:09, Jeff Squyres wrote: > Can you send us an all-C or all-Fortran example that shows the problem? > > We don't have easy access to test through the python bindings.  ...ok, I > admit it, it's laziness on my part.  :-) > Jeff, you should really learn Python

Re: [OMPI users] Allgather in inter-communicator bug,

Filed as https://svn.open-mpi.org/trac/ompi/ticket/2415. Thanks for the bug report! On May 20, 2010, at 1:33 PM, Edgar Gabriel wrote: > thanks for pointing the problem out. I checked in the code, the problem > is the MPI layer itself. The following check prevents us from doing > anything > >

Re: [OMPI users] Allgather in inter-communicator bug,

thanks for pointing the problem out. I checked in the code, the problem is the MPI layer itself. The following check prevents us from doing anything e.g. ompi/mpi/c/allgather.c if ((MPI_IN_PLACE != sendbuf && 0 == sendcount) || (0 == recvcount)) { return MPI_SUCCESS;

Re: [OMPI users] Buffer size limit and memory consumption problem on heterogeneous (32 bit / 64 bit) machines

I have done the test with v1.4.2 and indeed it fixes the problem. Thanks Nysal. Thank you also Terry for your help. With the fix I do not need anymore to use a huge value of btl_tcp_eager_limit (I keep the default value) which considerably decreases the memory consumption I had before. Everything

Re: [OMPI users] General question on the implementation of a"scheduler" on client side...

You're basically talking about implementing some kind of application-specific protocol. A few tips that may help in your design: 1. Look into MPI_Isend / MPI_Irecv for non-blocking sends and receives. These may be particularly useful in the server side, so that it can do other stuff while

Re: [OMPI users] Allgather in inter-communicator bug,

Hi, you are right, I should have provided C++ and Fortran example, so I am doing now Here is "cplusplus.cpp" #include #include using namespace std; int main() { MPI::Init(); char command[] = "./a.out"; MPI::Info info; MPI::Intercomm child = MPI::COMM_WORLD.Spawn(command,

Re: [OMPI users] Segmentation fault at program end with 2+ processes

I hope I'm not too late in my reply, and I hope I'm not repeating the same solution others have given you. I had a similar error in a code a few months ago. The error was this: I think I was doing an MPI_Pack/Unpack to send data between nodes. The problem was that I was allocating space for a

Re: [OMPI users] GM + OpenMPI bug ...

Hi Jose, On 5/12/2010 10:57 PM, Jos? Ignacio Aliaga Estell?s wrote: I think that I have found a bug on the implementation of GM collectives routines included in OpenMPI. The version of the GM software is 2.0.30 for the PCI64 cards. I obtain the same problems when I use the 1.4.1 or the 1.4.2

Re: [OMPI users] Allgather in inter-communicator bug,

Can you send us an all-C or all-Fortran example that shows the problem? We don't have easy access to test through the python bindings. ...ok, I admit it, it's laziness on my part. :-) But having a pure Open MPI test app would also remove some possible variables and possible sources of error.

Re: [OMPI users] Allgather in inter-communicator bug,

Hi Jody, I think that it is correct, you can test this example in your desktop, thanks, On Thu, May 20, 2010 at 3:18 AM, jody wrote: > Hi > I am really no python expert, but it looks to me as if you were > gathering arrays filled with zeroes: > a = array('i', [0]) * n >

Re: [OMPI users] How to show outputs from MPI program that runs on a cluster?

Thank you! Sang Chul On May 20, 2010, at 2:39 AM, jody wrote: > Hi > mpirun has an option for this (check the mpirun man page): > > -tag-output, --tag-output > Tag each line of output to stdout, stderr, and > stddiag with [jobid, rank] indicating the process jobid and >

Re: [OMPI users] Rép : openmpi + share points

I replied to this yesterday: http://www.open-mpi.org/community/lists/users/2010/05/13090.php On May 20, 2010, at 8:13 AM, Christophe Peyret wrote: > Hello, > > Thank for the advice, it works with NFS ! > > But : > > 1) it doesn't work anymore, if I remove --prefix

[OMPI users] Rép : openmpi + share points

Hello, Thank for the advice, it works with NFS ! But : 1) it doesn't work anymore, if I remove --prefix /Network/opt/openmpi-1.4.2 (is there a way to remove it on OSX, already declared ?) 2) I must use the option -static-intel at link else i have a problem with libiomp5.dylib not found

Re: [OMPI users] Buffer size limit and memory consumption problem on heterogeneous (32 bit / 64 bit) machines

2010/5/20 Nysal Jan > This probably got fixed in https://svn.open-mpi.org/trac/ompi/ticket/2386 > Can you try 1.4.2, the fix should be in there. > > I will test it soon (takes some time to install the new version on each node) . It would be perfect if it fixes it. I will tell

Re: [OMPI users] Buffer size limit and memory consumption problem on heterogeneous (32 bit / 64 bit) machines

Hello Terry, Thanks for your answer. 2010/5/20 Terry Dontje > Olivier Riff wrote: > > Hello, > > I assume this question has been already discussed many times, but I can not > find on Internet a solution to my problem. > It is about buffer size limit of MPI_Send and

Re: [OMPI users] Buffer size limit and memory consumption problem on heterogeneous (32 bit / 64 bit) machines

This probably got fixed in https://svn.open-mpi.org/trac/ompi/ticket/2386 Can you try 1.4.2, the fix should be in there. Regards --Nysal On Thu, May 20, 2010 at 2:02 PM, Olivier Riff wrote: > Hello, > > I assume this question has been already discussed many times, but I

Re: [OMPI users] Buffer size limit and memory consumption problem on heterogeneous (32 bit / 64 bit) machines

Olivier Riff wrote: Hello, I assume this question has been already discussed many times, but I can not find on Internet a solution to my problem. It is about buffer size limit of MPI_Send and MPI_Recv with heterogeneous system (32 bit laptop / 64 bit cluster). My configuration is : open mpi

[OMPI users] General question on the implementation of a "scheduler" on client side...

Hello, I have a general question about the best way to implement an openmpi application, i.e the design of the application. A machine (I call it the "server") should send to a cluster containing a lot of processors (the "clients") regularly task to do (byte buffers from very various size). The

[OMPI users] Buffer size limit and memory consumption problem on heterogeneous (32 bit / 64 bit) machines

Hello, I assume this question has been already discussed many times, but I can not find on Internet a solution to my problem. It is about buffer size limit of MPI_Send and MPI_Recv with heterogeneous system (32 bit laptop / 64 bit cluster). My configuration is : open mpi 1.4, configured with:

Re: [OMPI users] Allgather in inter-communicator bug,

Hi I am really no python expert, but it looks to me as if you were gathering arrays filled with zeroes: a = array('i', [0]) * n Shouldn't this line be a = array('i', [r])*n where r is the rank of the process? Jody On Thu, May 20, 2010 at 12:00 AM, Battalgazi YILDIRIM

Re: [OMPI users] How to show outputs from MPI program that runs on a cluster?

Hi mpirun has an option for this (check the mpirun man page): -tag-output, --tag-output Tag each line of output to stdout, stderr, and stddiag with [jobid, rank] indicating the process jobid and rank that generated the output, and the channel which generated