[OMPI users] Memory usage for MPI program

2015-06-01 Thread Manoj Vaghela
Hi OpenMPI users, I have been using OpenMPI for quite a few years now. Recently I figured out some memory related issues which are quite bothering me. I have OpenMPI 1.8.3 version installed on different machines. All machines are SMPs and linux x86_64. The Machine one and one-1 are installed with

Re: [OMPI users] Memory usage for MPI program

2015-06-01 Thread Nathan Hjelm
Just to be sure. How are you measuring the memory usage? If you are using /proc/meminfo are you subracting out the Cached memory usage? -Nathan On Mon, Jun 01, 2015 at 04:54:45AM -0400, Manoj Vaghela wrote: >Hi OpenMPI users, > >I have been using OpenMPI for quite a few years now. Recen

Re: [OMPI users] Memory usage for MPI program

2015-06-02 Thread Manoj Vaghela
Dear Nathan, After some initial debugging procedure, I found that the problem is with the CGNS (v 2.5) file which I am reading by each processor. The CGNS file which has 3-levels of userdefined data of descriptors/arrays is just read by each processor only for getting some texts, which in turn tak

Re: [OMPI users] Memory usage for MPI program

2015-06-17 Thread Manoj Vaghela
Hi, While checking for memory issues related with CGNS 2.5.5, on a test machine, the following output is display when just opening and closing CGNS file. Can anybody please help me on this? This machine is Centos 7 (minimal installation) with GCC 4.8.3 and CentOS 7. The gcc compiler is used. The

Re: [OMPI users] Memory usage for MPI program

2015-06-17 Thread Ralph Castain
How is the file read? From stdin? Or do they open it directly? If the latter, then it sure sounds like a CGNS issue to me - looks like they are slurping in the entire file, and then forget to free the memory when they close it. I can’t think of any solution short of getting them to look at the