Dear Mr. Squyres. We will try to install your bug-fixed nigthly tarball of 2014-10-24 on Cluster5 to see whether it works or not. The installation however will take some time. I get back to you, if I know more.
Let me add the information that on the Laki each nodes has 16 GB of shared memory (there it worked), the login-node on Cluster 5 has 64 GB (there it worked too), whereas the compute nodes on Cluster5 have 128 GB (there it did not work). So possibly the bug might have something to do with the size of the physical shared memory available on the node. Greetings Michael Rachner -----Ursprüngliche Nachricht----- Von: users [mailto:users-boun...@open-mpi.org] Im Auftrag von Jeff Squyres (jsquyres) Gesendet: Freitag, 24. Oktober 2014 22:45 An: Open MPI User's List Betreff: Re: [OMPI users] Bug in OpenMPI-1.8.3: storage limition in shared memory allocation (MPI_WIN_ALLOCATE_SHARED) in Ftn-code Nathan tells me that this may well be related to a fix that was literally just pulled into the v1.8 branch today: https://github.com/open-mpi/ompi-release/pull/56 Would you mind testing any nightly tarball after tonight? (i.e., the v1.8 tarballs generated tonight will be the first ones to contain this fix) http://www.open-mpi.org/nightly/master/ On Oct 24, 2014, at 11:46 AM, <michael.rach...@dlr.de> <michael.rach...@dlr.de> wrote: > Dear developers of OPENMPI, > > I am running a small downsized Fortran-testprogram for shared memory > allocation (using MPI_WIN_ALLOCATE_SHARED and MPI_WIN_SHARED_QUERY) ) > on only 1 node of 2 different Linux-clusters with OPENMPI-1.8.3 and > Intel-14.0.4 /Intel-13.0.1, respectively. > > The program simply allocates a sequence of shared data windows, each > consisting of 1 integer*4-array. > None of the windows is freed, so the amount of allocated data in shared > windows raises during the course of the execution. > > That worked well on the 1st cluster (Laki, having 8 procs per node)) > when allocating even 1000 shared windows each having 50000 integer*4 array > elements, i.e. a total of 200 MBytes. > On the 2nd cluster (Cluster5, having 24 procs per node) it also worked on the > login node, but it did NOT work on a compute node. > In that error case, there occurs something like an internal storage limit of > ~ 140 MB for the total storage allocated in all shared windows. > When that limit is reached, all later shared memory allocations fail (but > silently). > So the first attempt to use such a bad shared data window results in a bus > error due to the bad storage address encountered. > > That strange behavior could be observed in the small testprogram but also > with my large Fortran CFD-code. > If the error occurs, then it occurs with both codes, and both at a storage > limit of ~140 MB. > I found that this storage limit depends only weakly on the number of > processes (for np=2,4,8,16,24 it is: 144.4 , 144.0, 141.0, 137.0, > 132.2 MB) > > Note that the shared memory storage available on both clusters was very large > (many GB of free memory). > > Here is the error message when running with np=2 and an array > dimension of idim_1=50000 for the integer*4 array allocated per shared > window on the compute node of Cluster5: > In that case, the error occurred at the 723-th shared window, which is the > 1st badly allocated window in that case: > (722 successfully allocated shared windows * 50000 array elements * 4 > Bytes/el. = 144.4 MB) > > > [1,0]<stdout>: ========on nodemaster: iwin= 722 : > [1,0]<stdout>: total storage [MByte] alloc. in shared windows so far: > 144.400000000000 > [1,0]<stdout>: =========== allocation of shared window no. iwin= 723 > [1,0]<stdout>: starting now with idim_1= 50000 > [1,0]<stdout>: ========on nodemaster for iwin= 723 : before writing > on shared mem > [1,0]<stderr>:[r5i5n13:12597] *** Process received signal *** > [1,0]<stderr>:[r5i5n13:12597] Signal: Bus error (7) > [1,0]<stderr>:[r5i5n13:12597] Signal code: Non-existant physical > address (2) [1,0]<stderr>:[r5i5n13:12597] Failing at address: > 0x7fffe08da000 [1,0]<stderr>:[r5i5n13:12597] [ 0] > [1,0]<stderr>:/lib64/libpthread.so.0(+0xf800)[0x7ffff6d67800] > [1,0]<stderr>:[r5i5n13:12597] [ 1] ./a.out[0x408a8b] > [1,0]<stderr>:[r5i5n13:12597] [ 2] ./a.out[0x40800c] > [1,0]<stderr>:[r5i5n13:12597] [ 3] > [1,0]<stderr>:/lib64/libc.so.6(__libc_start_main+0xe6)[0x7ffff69fec36] > [1,0]<stderr>:[r5i5n13:12597] [ 4] [1,0]<stderr>:./a.out[0x407f09] > [1,0]<stderr>:[r5i5n13:12597] *** End of error message *** > [1,1]<stderr>:forrtl: error (78): process killed (SIGTERM) > [1,1]<stderr>:Image PC Routine Line > Source > [1,1]<stderr>:libopen-pal.so.6 00007FFFF4B74580 Unknown > Unknown Unknown > [1,1]<stderr>:libmpi.so.1 00007FFFF7267F3E Unknown > Unknown Unknown > [1,1]<stderr>:libmpi.so.1 00007FFFF733B555 Unknown > Unknown Unknown > [1,1]<stderr>:libmpi.so.1 00007FFFF727DFFD Unknown > Unknown Unknown > [1,1]<stderr>:libmpi_mpifh.so.2 00007FFFF779BA03 Unknown > Unknown Unknown > [1,1]<stderr>:a.out 0000000000408D15 Unknown > Unknown Unknown > [1,1]<stderr>:a.out 000000000040800C Unknown > Unknown Unknown > [1,1]<stderr>:libc.so.6 00007FFFF69FEC36 Unknown > Unknown Unknown > [1,1]<stderr>:a.out 0000000000407F09 Unknown > Unknown Unknown > ---------------------------------------------------------------------- > ---- mpiexec noticed that process rank 0 with PID 12597 on node > r5i5n13 exited on signal 7 (Bus error). > ---------------------------------------------------------------------- > ---- > > > The small Ftn-testprogram was built by > mpif90 sharedmemtest.f90 > mpiexec -np 2 -bind-to core -tag-output ./a.out > > Why does it work on the Laki (both on login-node and on a compute > node) as well as on the login-node of Cluster5, but fails on an compute node > of Cluster5? > > Greetings > Michael Rachner > > > > _______________________________________________ > users mailing list > us...@open-mpi.org > Subscription: http://www.open-mpi.org/mailman/listinfo.cgi/users > Link to this post: > http://www.open-mpi.org/community/lists/users/2014/10/25572.php -- Jeff Squyres jsquy...@cisco.com For corporate legal information go to: http://www.cisco.com/web/about/doing_business/legal/cri/ _______________________________________________ users mailing list us...@open-mpi.org Subscription: http://www.open-mpi.org/mailman/listinfo.cgi/users Link to this post: http://www.open-mpi.org/community/lists/users/2014/10/25580.php
