On 10/27/2014 08:21 AM, Angel de Vicente wrote:
Hi, is anyone aware of troubles with PHDF5 and IntelMPI? A test code to reads an HDF5 file in parallel has trouble when scaling if I run it with IntelMPI, but no trouble if I run it, for example, with POE.
The curie web site says "Global File System" and "Lustre", so I don't know which one you're using.
If it's lustre, maybe this will help you: https://press3.mcs.anl.gov/romio/2014/06/12/romio-and-intel-mpi/ ==rob
I'm using Intel compilers 13.0.1, IntelMPI 4.1.3.049, and HDF5 1.8.10 The code just reads a 800x800x800 HDF5 file, and the times I get for reading it are: 128 procs - 0.7262E+01 1024 procs - 0.9815E+01 1280 procs - 0.9930E+01 1600 procs - ??????? (it gest stalled...) But the same code (compiled with the above modules), but submitted with IBM's POE instead of IntelMPI has no trouble with 1600 procs (actually no trouble at all with up to 4096 procs) and it reads the file in 0.8963E+01 secs. Any help appreciated, _______________________________________________ Hdf-forum is for HDF software users discussion. [email protected] http://mail.lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org Twitter: https://twitter.com/hdf5
-- Rob Latham Mathematics and Computer Science Division Argonne National Lab, IL USA _______________________________________________ Hdf-forum is for HDF software users discussion. [email protected] http://mail.lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org Twitter: https://twitter.com/hdf5
