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. 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 > Red Hat Enterprise Linux Server release 5.4 and others are CentOS 7. > > I am using 16 cores on each machine. If I see memory consumption for a > finite volume problem of 3 million cells, it should take nearly 3GB of > memory on each machine for 16 cores usage. The following are some of the > values of memory consumption which I got. > > machine mem used(GB) total memory(GB) per > core > > > memory usage(%) > ========================================================== > one 2.114413568 66.075424 > 0.2 > one-1 2.368967808 24.676748 > 0.6 > two 7.362867456 32.869944 > 1.4 > three 7.333295872 16.368964 > 2.8 > four 7.356667136 32.842264 > 1.4 > five 7.350758912 > 32.815888 1.4 > > I am wondering why machines two to five are taking high memory against the > machines one and one-1 for the same setup files for this problem. > > I have compiled OpenMPI with its default options on all machines. > > It will help if somebody has any idea on this problem. Is there anything > to be set while building OpenMPI ? or it is OS problem? > Thanks. > > Manoj > > _______________________________________________ > users mailing list > us...@open-mpi.org > Subscription: http://www.open-mpi.org/mailman/listinfo.cgi/users > Searchable archives: > http://www.open-mpi.org/community/lists/users/2015/06/27006.php
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