Re: [OMPI users] slot number calculation when no config files?

So default slots = "CPU"s/2 but there is some leeway in what is considered to be a CPU? So far I have not found the actual formula documented anywhere. Thanks, David Mathog On Mon, Jun 8, 2020 at 11:37 AM Ralph Castain via users wrote: > > Note that you can also resolve it

[OMPI users] slot number calculation when no config files?

: Little Endian CPU(s): 4 On-line CPU(s) list: 0-3 Thread(s) per core: 2 $ gcc --version gcc (GCC) 8.3.1 20190507 (Red Hat 8.3.1-4) Thanks, David Mathog

Re: [OMPI users] OMPI 4.0.1 valgrind error on simple MPI_Send()

On 30-Apr-2019 11:39, George Bosilca wrote: Depending on the alignment of the different types there might be small holes in the low-level headers we exchange between processes It should not be a concern for users. valgrind should not stop on the first detected issue except if --exit-on-first-e

[OMPI users] OMPI 4.0.1 valgrind error on simple MPI_Send()

ession file supplied with the release does not prevent that. How do I work around this? Thank you, David Mathog mat...@caltech.edu Manager, Sequence Analysis Facility, Biology Division, Caltech ___ users mailing list users@lists.open-mpi.org https

Re: [OMPI users] heterogenous cluster

m32 on the gcc commmand lines. Generally one does that by something like: export CFLAGS=-m32 before running configure to generate Makefiles. Regards, David Mathog mat...@caltech.edu Manager, Sequence Analysis Facility, Biology Division, Caltech

Re: [OMPI users] heterogenous cluster

ong with a 32 bit version of OpenMPI. At least that approach has worked so far for me. Regards, David Mathog mat...@caltech.edu Manager, Sequence Analysis Facility, Biology Division, Caltech

Re: [OMPI users] Hair depleting issue with Ompi143 and one program

_FLT4(a)(((__uni16)(a)).f4) fprintf(stderr,"DEBUG xEV values %f %f %f %f\n",EMM_FLT4(xEv)[0],EMM_FLT4(xEv)[1],EMM_FLT4(xEv)[2],EMM_FLT4(xEv)[3]);fflush(stderr); Thanks! David Mathog mat...@caltech.edu Manager, Sequence Analysis Facility, Biology Division, Caltech

Re: [OMPI users] Hair depleting issue with Ompi143 and one program

n emms is not invoked after an MMX run can be very strange. Grasping at straws here though, presumably both the OS and MPI (it it does this at all) preserve the state of all registers when swapping processes around on a machine. Thanks, David Mathog mat...@caltech.edu Manager, Sequence Analysis

[OMPI users] Hair depleting issue with Ompi143 and one program

chine (that's why the -m32 is there) or a 32 bit machine gives the same result. If any of you have seen something like this before and can suggest a way to proceed I would be very grateful. Thanks, David Mathog mat...@caltech.edu Manager, Sequence Analysis Facility, Biology Division, Caltech

Re: [OMPI users] mpirun --nice 10 prog ??

t does now. Or are we the only site where quick high priority jobs must run on the same nodes where long term low priority jobs are also running? Thanks, David Mathog mat...@caltech.edu Manager, Sequence Analysis Facility, Biology Division, Caltech

[OMPI users] mpirun --nice 10 prog ??

Is it possible using mpirun to specify the nice value for each program run on the worker nodes? It looks like some MPI implementations allow this, but "mpirun --help" doesn't say anything about it. Thanks, David Mathog mat...@caltech.edu Manager, Sequence Analysis Facility, B

[OMPI users] Valgrind suppression not so suppressed

algrind. Is there a suppression file for these versions that will shut down all messages under PMPI_INit but still allow the messages from the program being tested??? Thanks, David Mathog mat...@caltech.edu Manager, Sequence Analysis Facility, Biology Division, Caltech

Re: [OMPI users] MPI_Bcast vs. per worker MPI_Send?

eceding loop be replaced by MPI_Get_Counts (allocate memory as needed) MPI_Gatherv although I guess even that wouldn't be very efficient with memory, because there would usually be huge holes in the recv buffer. Thanks, David Mathog mat...@caltech.edu Manager, Sequence Analysis Facili

[OMPI users] MPI_Bcast vs. per worker MPI_Send?

two approaches? That is, does MPI_Bcast really broadcast, daisy chain, or use other similar methods to reduce bandwidth use when distributing its message, or does it just go ahead and run MPI_Send in a loop anyway, but hide the details from the programmer? Thanks, David Mathog mat...@caltech.edu

Re: [OMPI users] curious behavior during wait for broadcast: 100% cpu

0.0, 48.9, 5.1, 0.0] Top is even less help, it just shows the worker process on each node at >98% CPU. Thanks, David Mathog mat...@caltech.edu Manager, Sequence Analysis Facility, Biology Division, Caltech

Re: [OMPI users] Method for worker to determine its "rank" on a single machine?

Ashley Pittman wrote: > For a much simpler approach you could also use these two environment variables, this is on my current system which is 1.5 based, YMMV of course. > > OMPI_COMM_WORLD_LOCAL_RANK > OMPI_COMM_WORLD_LOCAL_SIZE That is simpler. It works on OMPI 1.4.3 too: cat >/usr/common/bin

[OMPI users] Guaranteed run rank 0 on a given machine?

ted mapping: Verify that you have mapped the allocated resources properly using the --host or --hostfile specification. ------ Thanks, David Mathog mat...@caltech.edu Manager, Sequence Analysis Facility, Biology Division, Caltech

Re: [OMPI users] Method for worker to determine its "rank" on a single machine?

t of rank numbers of all the local workers. The array llist must be of size lmax. Thanks, David Mathog mat...@caltech.edu Manager, Sequence Analysis Facility, Biology Division, Caltech

[OMPI users] Method for worker to determine its "rank" on a single machine?

ugly fast, especially if they don't all start at the same time. Thanks, David Mathog mat...@caltech.edu Manager, Sequence Analysis Facility, Biology Division, Caltech

Re: [OMPI users] Anybody built a working 1.4.1 on Solaris 8 (Sparc)?

compilers should generate faster code than gcc, and I would prefer to use them if possible. Thanks, David Mathog mat...@caltech.edu Manager, Sequence Analysis Facility, Biology Division, Caltech

[OMPI users] Anybody built a working 1.4.1 on Solaris 8 (Sparc)?

m_iFuncStatSortFlags is not accessible from Statistics::FuncStat_struct::operator<(const Statistics::FuncStat_struct&) const. 1 Error(s) detected. This error didn't go away when -DVT_OMP was removed, nor when -xopenmp was also taken away, and so the final score is: working OpenMPI 1.4.1 on So