George beat me to the reply. :-) His advice is the correct one (check out what's happening in a debugger). This will likely work better with a hand-built Open MPI (vs. Homebrew), because then you can configure/build Open MPI with -g so that the debugger will be able to see the source code. E.g.:
./configure CFLAGS=-g ... make -j 8 all [sudo] make install (put whatever other configure flags you want in there, such as a custom prefix, ... etc.) -- Jeff Squyres jsquy...@cisco.com ________________________________________ From: users <users-boun...@lists.open-mpi.org> on behalf of George Bosilca via users <users@lists.open-mpi.org> Sent: Wednesday, May 4, 2022 12:35 PM To: Open MPI Users Cc: George Bosilca Subject: Re: [OMPI users] mpirun hangs on m1 mac w openmpi-4.1.3 I compiled a fresh copy of the 4.1.3 branch on my M1 laptop, and I can run both MPI and non-MPI apps without any issues. Try running `lldb mpirun -- -np 1 hostname` and once it deadlocks, do a CTRL+C to get back on the debugger and then `backtrace` to see where it is waiting. George. On Wed, May 4, 2022 at 11:28 AM Scott Sayres via users <users@lists.open-mpi.org<mailto:users@lists.open-mpi.org>> wrote: Thanks for looking at this Jeff. No, I cannot use mpirun to launch a non-MPI application. The command "mpirun -np 2 hostname" also hangs. I get the following output if I add the -d command before (I've replaced the server with the hashtags) : [scotts-mbp.3500.dhcp.###:05469] procdir: /var/folders/l0/94hsdtwj09xd62d90nfh_3h00000gn/T//ompi.scotts-mbp.501/pid.5469/0/0 [scotts-mbp.3500.dhcp.###:05469] jobdir: /var/folders/l0/94hsdtwj09xd62d90nfh_3h00000gn/T//ompi.scotts-mbp.501/pid.5469/0 [scotts-mbp.3500.dhcp.###:05469] top: /var/folders/l0/94hsdtwj09xd62d90nfh_3h00000gn/T//ompi.scotts-mbp.501/pid.5469 [scotts-mbp.3500.dhcp.###:05469] top: /var/folders/l0/94hsdtwj09xd62d90nfh_3h00000gn/T//ompi.scotts-mbp.501 [scotts-mbp.3500.dhcp.###:05469] tmp: /var/folders/l0/94hsdtwj09xd62d90nfh_3h00000gn/T/ [scotts-mbp.3500.dhcp.###:05469] sess_dir_cleanup: job session dir does not exist [scotts-mbp.3500.dhcp.###:05469] sess_dir_cleanup: top session dir not empty - leaving [scotts-mbp.3500.dhcp.###:05469] procdir: /var/folders/l0/94hsdtwj09xd62d90nfh_3h00000gn/T//ompi.scotts-mbp.501/pid.5469/0/0 [scotts-mbp.3500.dhcp.###:05469] jobdir: /var/folders/l0/94hsdtwj09xd62d90nfh_3h00000gn/T//ompi.scotts-mbp.501/pid.5469/0 [scotts-mbp.3500.dhcp.###:05469] top: /var/folders/l0/94hsdtwj09xd62d90nfh_3h00000gn/T//ompi.scotts-mbp.501/pid.5469 [scotts-mbp.3500.dhcp.###:05469] top: /var/folders/l0/94hsdtwj09xd62d90nfh_3h00000gn/T//ompi.scotts-mbp.501 [scotts-mbp.3500.dhcp.###:05469] tmp: /var/folders/l0/94hsdtwj09xd62d90nfh_3h00000gn/T/ [scotts-mbp.3500.dhcp.###:05469] [[48286,0],0] Releasing job data for [INVALID] Can you recommend a way to find where mpirun gets stuck? Thanks! Scott On Wed, May 4, 2022 at 6:06 AM Jeff Squyres (jsquyres) <jsquy...@cisco.com<mailto:jsquy...@cisco.com>> wrote: Are you able to use mpirun to launch a non-MPI application? E.g.: mpirun -np 2 hostname And if that works, can you run the simple example MPI apps in the "examples" directory of the MPI source tarball (the "hello world" and "ring" programs)? E.g.: cd examples make mpirun -np 4 hello_c mpirun -np 4 ring_c -- Jeff Squyres jsquy...@cisco.com<mailto:jsquy...@cisco.com> ________________________________________ From: users <users-boun...@lists.open-mpi.org<mailto:users-boun...@lists.open-mpi.org>> on behalf of Scott Sayres via users <users@lists.open-mpi.org<mailto:users@lists.open-mpi.org>> Sent: Tuesday, May 3, 2022 1:07 PM To: users@lists.open-mpi.org<mailto:users@lists.open-mpi.org> Cc: Scott Sayres Subject: [OMPI users] mpirun hangs on m1 mac w openmpi-4.1.3 Hello, I am new to openmpi, but would like to use it for ORCA calculations, and plan to run codes on the 10 processors of my macbook pro. I installed this manually and also through homebrew with similar results. I am able to compile codes with mpicc and run them as native codes, but everything that I attempt with mpirun, mpiexec just freezes. I can end the program by typing 'control C' twice, but it continues to run in the background and requires me to 'kill <pid>'. even as simple as 'mpirun uname' freezes I have tried one installation by: 'arch -arm64 brew install openmpi ' and a second by downloading the source file, './configure --prefix=/usr/local', 'make all', make install the commands: 'which mpicc', 'which 'mpirun', etc are able to find them on the path... it just hangs. Can anyone suggest how to fix the problem of the program hanging? Thanks! Scott -- Scott G Sayres Assistant Professor School of Molecular Sciences (formerly Department of Chemistry & Biochemistry) Biodesign Center for Applied Structural Discovery Arizona State University
