[petsc-users] PETSc and Windows 10

[Paolo Lampitella]

Not sure if I did the same. I first made the petsc install in a folder in my cygwin home and then copied the mpich executables, their .dll dependencies, my executable and its dependencies in a folder on my desktop.

Then I went there with both terminals (cygwin and window) and launched using mpiexec.hydra.exe in the folder (noting the difference between using ./ and .\ prepended to both executables in the two terminals).

With cygwin terminal things worked as expected. It is kind of premarure now for testing performances, but I feel that some compromise here can be admitted, considering the different constraints. I didn't pay too much attention in this phase but I haven't seen nothing suspiciously slow as well (the point is that I don't have a native linux install now to make a meaningful comparison).

However, running from the Windows terminal, things worked differently for me. It seems that it worked, but I had to give a second Enter hit... maybe I'm missing something behind the lines.

I still have to recompile with OpenMPI to have a meaningful comparison

Thanks

Paolo



Inviato da smartphone Samsung Galaxy.

-------- Messaggio originale --------
Da: Satish Balay <balay at mcs.anl.gov>
Data: 28/06/20 18:17 (GMT+01:00)
A: Satish Balay via petsc-users <petsc-users at mcs.anl.gov>
Cc: Paolo Lampitella <paololampitella at hotmail.com>, Pierre Jolivet <pierre.jolivet at enseeiht.fr>
Oggetto: Re: [petsc-users] PETSc and Windows 10

On Sun, 28 Jun 2020, Satish Balay via petsc-users wrote:

> On Sun, 28 Jun 2020, Paolo Lampitella wrote:

> >      *   For my Cygwin-GNU route (basically what is mentioned in PFLOTRAN documentation), am I expected to then run from the cygwin terminal or should the windows prompt work as well? Is the fact that I require a second Enter hit and the mismanagement of serial executables the sign of something wrong with the Windows prompt?
>
> I would think Cygwin-GNU route should work. I'll have to see if I can reproduce the issues you have.

I attempted a couple of builds - one with mpich and the other with cygwin-openmpi

mpich compiled petsc example works sequentially - however mpiexec appears to require cygwin env.

>>>>>>>>
C:\petsc-install\bin>ex5f
Number of SNES iterations =     4

C:\petsc-install\bin>mpiexec -n 1 ex5f
[cli_0]: write_line error; fd=448 buf=:cmd=init pmi_version=1 pmi_subversion=1
:
system msg for write_line failure : Bad file descriptor
[cli_0]: Unable to write to PMI_fd
[cli_0]: write_line error; fd=448 buf=:cmd=get_appnum
:
system msg for write_line failure : Bad file descriptor
Fatal error in MPI_Init: Other MPI error, error stack:
MPIR_Init_thread(467):
MPID_Init(140).......: channel initialization failed
MPID_Init(421).......: PMI_Get_appnum returned -1
[cli_0]: aborting job:
Fatal error in MPI_Init: Other MPI error, error stack:
MPIR_Init_thread(467):
MPID_Init(140).......: channel initialization failed
MPID_Init(421).......: PMI_Get_appnum returned -1

C:\petsc-install\bin>
<<<<<<

cygwin-openmpi compiled petsc example binary gives errors even for sequential run

>>>>>>>>
C:\Users\balay\test>ex5f
Warning: '/dev/shm' does not exists or is not a directory.

POSIX shared memory objects require the existance of this directory.
Create the directory '/dev/shm' and set the permissions to 01777.
For instance on the command line: mkdir -m 01777 /dev/shm
[ps5:00560] [[INVALID],INVALID] ORTE_ERROR_LOG: A system-required executable either could not be found or was not executable by this user in file /cygdrive/d/cyg_pub/devel/openmpi/v3.1/prova/openmpi-3.1.6-1.x86_64/src/openmpi-3.1.6/orte/mca/ess/singleton/ess_singleton_module.c at line 388
[ps5:00560] [[INVALID],INVALID] ORTE_ERROR_LOG: A system-required executable either could not be found or was not executable by this user in file /cygdrive/d/cyg_pub/devel/openmpi/v3.1/prova/openmpi-3.1.6-1.x86_64/src/openmpi-3.1.6/orte/mca/ess/singleton/ess_singleton_module.c at line 166
--------------------------------------------------------------------------
Sorry!  You were supposed to get help about:
    orte_init:startup:internal-failure
But I couldn't open the help file:
    /usr/share/openmpi/help-orte-runtime: No such file or directory.  Sorry!
--------------------------------------------------------------------------
<<<<<<<

So looks like you would need cygwin installed to run Cygwin-MPI binaries.. Also I don't know how cygwin/windows interaction overhead will affect parallel performance.

Satish
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