Re: [OMPI users] busy wait in MPI_Recv

Brian Budge wrote: Hi all - I just ran a small test to find out the overhead of an MPI_Recv call when no communication is occurring. It seems quite high. I noticed during my google excursions that openmpi does busy waiting. I also noticed that the option to -mca mpi_yield_when_idle seems

[OMPI users] busy wait in MPI_Recv

Hi all - I just ran a small test to find out the overhead of an MPI_Recv call when no communication is occurring. It seems quite high. I noticed during my google excursions that openmpi does busy waiting. I also noticed that the option to -mca mpi_yield_when_idle seems not to help much (in

Re: [OMPI users] my leak or OpenMPI's leak?

yes, sorry. I did mean 1.5. In my case, going back to 1.43 solved my oom problem. On Sun, Oct 17, 2010 at 4:57 PM, Ralph Castain wrote: > There is no OMPI 2.5 - do you mean 1.5? > > On Oct 17, 2010, at 4:11 PM, Brian Budge wrote: > >> Hi Jody - >> >> I noticed this exact

Re: [OMPI users] openmpi 1.5 build from rpm fails: --program-prefix now checked in configure

Thanks for the report. Someone reported pretty much the same issue to me off-list a few days ago for RHEL5. It looks like RHEL5 / 6 ship with Autoconf 2.63, and have a /usr/lib/rpm/macros that defines %configure to include options such as --program-suffix. We bootstrapped Open MPI v1.5

[OMPI users] Open MPI dynamic data structure error

Hi, I need to design a data structure to transfer data between nodes on Open MPI system. Some elements of the the structure has dynamic size. For example, typedef struct{ double data1;vector dataVec; } myDataType; The size of the dataVec depends on some intermidiate computing results. If I

Re: [OMPI users] a question about [MPI]IO on systems without network filesystem

As Rob mentions There are three capabilities to consider: 1) The process (or processes) that will do the I/O are members of the file handle's hidden communicator and the call is collective 2)) The process (or processes) that will do the I/O are members of the file handle's hidden communicator

Re: [OMPI users] a question about [MPI]IO on systems without network filesystem

On Thu, Sep 30, 2010 at 09:00:31AM -0400, Richard Treumann wrote: > It is possible for MPI-IO to be implemented in a way that lets a single > process or the set of process on a node act as the disk i/O agents for the > entire job but someone else will need to tell you if OpenMPI can do this, >

Re: [OMPI users] Number of processes and spawn

The fix should be there - just didn't get mentioned. Let me know if it isn't and I'll ensure it is in the next one...but I'd be very surprised if it isn't already in there. On Oct 19, 2010, at 3:03 AM, Federico Golfrè Andreasi wrote: > Hi Ralf ! > > I saw that the new realease 1.5 is out. >

Re: [OMPI users] Number of processes and spawn

Hi Ralf ! I saw that the new realease 1.5 is out. I didn't found this fix in the "list of changes", is it present but not mentioned since is a minor fix ? Thank you, Federico 2010/4/1 Ralph Castain > Hi there! > > It will be in the 1.5.0 release, but not 1.4.2 (couldn't

[OMPI users] openmpi 1.5 build from rpm fails: --program-prefix now checked in configure

Hi this is to report that building openmpi-1.5 from rpm fails on Linux SLES10sp3 x86_64, due to --program-prefix switch use now checked in configure script delivered with 1.5. rpm is version 4.4.2-43.36.1 rpmbuild --rebuild SRPMS/openmpi-1.5.0.src.rpm --define 'configure_options