I posted some information at the issue.
IMHO it is likely a bug in one or more of hypre's smoothers that use OpenMP.
We have never tested them before (and likely hypre has not tested all the
combinations) and so would not have seen the bug. Hopefully they can just fix
it.
Barry
I got the problem to occur with ex56 with 2 MPI ranks and 4 OpenMP threads,
if I used less than 4 threads it did not generate an indefinite preconditioner.
> On Mar 14, 2021, at 1:18 PM, Eric Chamberland
> <[email protected]> wrote:
>
> Done:
>
> https://github.com/hypre-space/hypre/issues/303
> <https://github.com/hypre-space/hypre/issues/303>
> Maybe I will need some help about PETSc to answer their questions...
>
> Eric
>
> On 2021-03-14 3:44 a.m., Stefano Zampini wrote:
>> Eric
>>
>> You should report these HYPRE issues upstream
>> https://github.com/hypre-space/hypre/issues
>> <https://github.com/hypre-space/hypre/issues>
>>
>>
>>> On Mar 14, 2021, at 3:44 AM, Eric Chamberland
>>> <[email protected]
>>> <mailto:[email protected]>> wrote:
>>>
>>> For us it clearly creates problems in real computations...
>>>
>>> I understand the need to have clean test for PETSc, but for me, it reveals
>>> that hypre isn't usable with more than one thread for now...
>>>
>>> Another solution: force single-threaded configuration for hypre until this
>>> is fixed?
>>>
>>> Eric
>>>
>>> On 2021-03-13 8:50 a.m., Pierre Jolivet wrote:
>>>> -pc_hypre_boomeramg_relax_type_all Jacobi =>
>>>> Linear solve did not converge due to DIVERGED_INDEFINITE_PC iterations 3
>>>> -pc_hypre_boomeramg_relax_type_all l1scaled-Jacobi =>
>>>> OK, independently of the architecture it seems (Eric Docker image with 1
>>>> or 2 threads or my macOS), but contraction factor is higher
>>>> Linear solve converged due to CONVERGED_RTOL iterations 8
>>>> Linear solve converged due to CONVERGED_RTOL iterations 24
>>>> Linear solve converged due to CONVERGED_RTOL iterations 26
>>>> v. currently
>>>> Linear solve converged due to CONVERGED_RTOL iterations 7
>>>> Linear solve converged due to CONVERGED_RTOL iterations 9
>>>> Linear solve converged due to CONVERGED_RTOL iterations 10
>>>>
>>>> Do we change this? Or should we force OMP_NUM_THREADS=1 for make test?
>>>>
>>>> Thanks,
>>>> Pierre
>>>>
>>>>> On 13 Mar 2021, at 2:26 PM, Mark Adams <[email protected]
>>>>> <mailto:[email protected]>> wrote:
>>>>>
>>>>> Hypre uses a multiplicative smoother by default. It has a chebyshev
>>>>> smoother. That with a Jacobi PC should be thread invariant.
>>>>> Mark
>>>>>
>>>>> On Sat, Mar 13, 2021 at 8:18 AM Pierre Jolivet <[email protected]
>>>>> <mailto:[email protected]>> wrote:
>>>>>
>>>>>> On 13 Mar 2021, at 9:17 AM, Pierre Jolivet <[email protected]
>>>>>> <mailto:[email protected]>> wrote:
>>>>>>
>>>>>> Hello Eric,
>>>>>> I’ve made an “interesting” discovery, so I’ll put back the list in c/c.
>>>>>> It appears the following snippet of code which uses Allreduce() + lambda
>>>>>> function + MPI_IN_PLACE is:
>>>>>> - Valgrind-clean with MPICH;
>>>>>> - Valgrind-clean with OpenMPI 4.0.5;
>>>>>> - not Valgrind-clean with OpenMPI 4.1.0.
>>>>>> I’m not sure who is to blame here, I’ll need to look at the MPI
>>>>>> specification for what is required by the implementors and users in that
>>>>>> case.
>>>>>>
>>>>>> In the meantime, I’ll do the following:
>>>>>> - update config/BuildSystem/config/packages/OpenMPI.py to use OpenMPI
>>>>>> 4.1.0, see if any other error appears;
>>>>>> - provide a hotfix to bypass the segfaults;
>>>>>
>>>>> I can confirm that splitting the single Allreduce with my own MPI_Op into
>>>>> two Allreduce with MAX and BAND fixes the segfaults with OpenMPI (*).
>>>>>
>>>>>> - look at the hypre issue and whether they should be deferred to the
>>>>>> hypre team.
>>>>>
>>>>> I don’t know if there is something wrong in hypre threading or if it’s
>>>>> just a side effect of threading, but it seems that the number of threads
>>>>> has a drastic effect on the quality of the PC.
>>>>> By default, it looks that there are two threads per process with your
>>>>> Docker image.
>>>>> If I force OMP_NUM_THREADS=1, then I get the same convergence as in the
>>>>> output file.
>>>>>
>>>>> Thanks,
>>>>> Pierre
>>>>>
>>>>> (*) https://gitlab.com/petsc/petsc/-/merge_requests/3712
>>>>> <https://gitlab.com/petsc/petsc/-/merge_requests/3712>
>>>>>> Thank you for the Docker files, they were really useful.
>>>>>> If you want to avoid oversubscription failures, you can edit the file
>>>>>> /opt/openmpi-4.1.0/etc/openmpi-default-hostfile and append the line:
>>>>>> localhost slots=12
>>>>>> If you want to increase the timeout limit of PETSc test suite for each
>>>>>> test, you can add the extra flag in your command line TIMEOUT=180
>>>>>> (default is 60, units are seconds).
>>>>>>
>>>>>> Thanks, I’ll ping you on GitLab when I’ve got something ready for you to
>>>>>> try,
>>>>>> Pierre
>>>>>>
>>>>>> <ompi.cxx>
>>>>>>
>>>>>>> On 12 Mar 2021, at 8:54 PM, Eric Chamberland
>>>>>>> <[email protected]
>>>>>>> <mailto:[email protected]>> wrote:
>>>>>>>
>>>>>>> Hi Pierre,
>>>>>>>
>>>>>>> I now have a docker container reproducing the problems here.
>>>>>>>
>>>>>>> Actually, if I look at snes_tutorials-ex12_quad_singular_hpddm it
>>>>>>> fails like this:
>>>>>>>
>>>>>>> not ok snes_tutorials-ex12_quad_singular_hpddm # Error code: 59
>>>>>>> # Initial guess
>>>>>>> # L_2 Error: 0.00803099
>>>>>>> # Initial Residual
>>>>>>> # L_2 Residual: 1.09057
>>>>>>> # Au - b = Au + F(0)
>>>>>>> # Linear L_2 Residual: 1.09057
>>>>>>> # [d470c54ce086:14127] Read -1, expected 4096, errno = 1
>>>>>>> # [d470c54ce086:14128] Read -1, expected 4096, errno = 1
>>>>>>> # [d470c54ce086:14129] Read -1, expected 4096, errno = 1
>>>>>>> # [3]PETSC ERROR:
>>>>>>> ------------------------------------------------------------------------
>>>>>>> # [3]PETSC ERROR: Caught signal number 11 SEGV: Segmentation
>>>>>>> Violation, probably memory access out of range
>>>>>>> # [3]PETSC ERROR: Try option -start_in_debugger or
>>>>>>> -on_error_attach_debugger
>>>>>>> # [3]PETSC ERROR: or see
>>>>>>> https://www.mcs.anl.gov/petsc/documentation/faq.html#valgrind
>>>>>>> <https://www.mcs.anl.gov/petsc/documentation/faq.html#valgrind>
>>>>>>> # [3]PETSC ERROR: or try http://valgrind.org
>>>>>>> <http://valgrind.org/> on GNU/linux and Apple Mac OS X to find memory
>>>>>>> corruption errors
>>>>>>> # [3]PETSC ERROR: likely location of problem given in stack below
>>>>>>> # [3]PETSC ERROR: --------------------- Stack Frames
>>>>>>> ------------------------------------
>>>>>>> # [3]PETSC ERROR: Note: The EXACT line numbers in the stack are
>>>>>>> not available,
>>>>>>> # [3]PETSC ERROR: INSTEAD the line number of the start of
>>>>>>> the function
>>>>>>> # [3]PETSC ERROR: is given.
>>>>>>> # [3]PETSC ERROR: [3] buildTwo line 987
>>>>>>> /opt/petsc-main/include/HPDDM_schwarz.hpp
>>>>>>> # [3]PETSC ERROR: [3] next line 1130
>>>>>>> /opt/petsc-main/include/HPDDM_schwarz.hpp
>>>>>>> # [3]PETSC ERROR: --------------------- Error Message
>>>>>>> --------------------------------------------------------------
>>>>>>> # [3]PETSC ERROR: Signal received
>>>>>>> # [3]PETSC ERROR: [0]PETSC ERROR:
>>>>>>> ------------------------------------------------------------------------
>>>>>>>
>>>>>>> also ex12_quad_hpddm_reuse_baij fails with a lot more "Read -1,
>>>>>>> expected ..." which I don't know where they come from...?
>>>>>>>
>>>>>>> Hypre (like in diff-snes_tutorials-ex56_hypre) is also having
>>>>>>> DIVERGED_INDEFINITE_PC failures...
>>>>>>>
>>>>>>> Please see the 3 attached docker files:
>>>>>>>
>>>>>>> 1) fedora_mkl_and_devtools : the DockerFile which install fedore 33
>>>>>>> with gnu compilers and MKL and everything to develop.
>>>>>>>
>>>>>>> 2) openmpi: the DockerFile to bluid OpenMPI
>>>>>>>
>>>>>>> 3) petsc: The las DockerFile that build/install and test PETSc
>>>>>>>
>>>>>>> I build the 3 like this:
>>>>>>>
>>>>>>> docker build -t fedora_mkl_and_devtools -f fedora_mkl_and_devtools .
>>>>>>>
>>>>>>> docker build -t openmpi -f openmpi .
>>>>>>>
>>>>>>> docker build -t petsc -f petsc .
>>>>>>>
>>>>>>> Disclaimer: I am not a docker expert, so I may do things that are not
>>>>>>> docker-stat-of-the-art but I am opened to suggestions... ;)
>>>>>>>
>>>>>>> I have just ran it on my portable (long) which have not enough cores,
>>>>>>> so many more tests failed (should force --oversubscribe but don't know
>>>>>>> how to). I will relaunch on my workstation in a few minutes.
>>>>>>>
>>>>>>> I will now test your branch! (sorry for the delay).
>>>>>>>
>>>>>>> Thanks,
>>>>>>>
>>>>>>> Eric
>>>>>>>
>>>>>>> On 2021-03-11 9:03 a.m., Eric Chamberland wrote:
>>>>>>>> Hi Pierre,
>>>>>>>>
>>>>>>>> ok, that's interesting!
>>>>>>>>
>>>>>>>> I will try to build a docker image until tomorrow and give you the
>>>>>>>> exact recipe to reproduce the bugs.
>>>>>>>>
>>>>>>>> Eric
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>> On 2021-03-11 2:46 a.m., Pierre Jolivet wrote:
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>> On 11 Mar 2021, at 6:16 AM, Barry Smith <[email protected]
>>>>>>>>>> <mailto:[email protected]>> wrote:
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> Eric,
>>>>>>>>>>
>>>>>>>>>> Sorry about not being more immediate. We still have this in our
>>>>>>>>>> active email so you don't need to submit individual issues. We'll
>>>>>>>>>> try to get to them as soon as we can.
>>>>>>>>>
>>>>>>>>> Indeed, I’m still trying to figure this out.
>>>>>>>>> I realized that some of my configure flags were different than yours,
>>>>>>>>> e.g., no --with-memalign.
>>>>>>>>> I’ve also added SuperLU_DIST to my installation.
>>>>>>>>> Still, I can’t reproduce any issue.
>>>>>>>>> I will continue looking into this, it appears I’m seeing some
>>>>>>>>> valgrind errors, but I don’t know if this is some side effect of
>>>>>>>>> OpenMPI not being valgrind-clean (last time I checked, there was no
>>>>>>>>> error with MPICH).
>>>>>>>>>
>>>>>>>>> Thank you for your patience,
>>>>>>>>> Pierre
>>>>>>>>>
>>>>>>>>> /usr/bin/gmake -f gmakefile test test-fail=1
>>>>>>>>> Using MAKEFLAGS: test-fail=1
>>>>>>>>> TEST
>>>>>>>>> arch-linux2-c-opt-ompi/tests/counts/snes_tutorials-ex12_quad_hpddm_reuse_baij.counts
>>>>>>>>> ok snes_tutorials-ex12_quad_hpddm_reuse_baij
>>>>>>>>> ok diff-snes_tutorials-ex12_quad_hpddm_reuse_baij
>>>>>>>>> TEST
>>>>>>>>> arch-linux2-c-opt-ompi/tests/counts/ksp_ksp_tests-ex33_superlu_dist_2.counts
>>>>>>>>> ok ksp_ksp_tests-ex33_superlu_dist_2
>>>>>>>>> ok diff-ksp_ksp_tests-ex33_superlu_dist_2
>>>>>>>>> TEST
>>>>>>>>> arch-linux2-c-opt-ompi/tests/counts/ksp_ksp_tests-ex49_superlu_dist.counts
>>>>>>>>> ok ksp_ksp_tests-ex49_superlu_dist+nsize-1herm-0_conv-0
>>>>>>>>> ok diff-ksp_ksp_tests-ex49_superlu_dist+nsize-1herm-0_conv-0
>>>>>>>>> ok ksp_ksp_tests-ex49_superlu_dist+nsize-1herm-0_conv-1
>>>>>>>>> ok diff-ksp_ksp_tests-ex49_superlu_dist+nsize-1herm-0_conv-1
>>>>>>>>> ok ksp_ksp_tests-ex49_superlu_dist+nsize-1herm-1_conv-0
>>>>>>>>> ok diff-ksp_ksp_tests-ex49_superlu_dist+nsize-1herm-1_conv-0
>>>>>>>>> ok ksp_ksp_tests-ex49_superlu_dist+nsize-1herm-1_conv-1
>>>>>>>>> ok diff-ksp_ksp_tests-ex49_superlu_dist+nsize-1herm-1_conv-1
>>>>>>>>> ok ksp_ksp_tests-ex49_superlu_dist+nsize-4herm-0_conv-0
>>>>>>>>> ok diff-ksp_ksp_tests-ex49_superlu_dist+nsize-4herm-0_conv-0
>>>>>>>>> ok ksp_ksp_tests-ex49_superlu_dist+nsize-4herm-0_conv-1
>>>>>>>>> ok diff-ksp_ksp_tests-ex49_superlu_dist+nsize-4herm-0_conv-1
>>>>>>>>> ok ksp_ksp_tests-ex49_superlu_dist+nsize-4herm-1_conv-0
>>>>>>>>> ok diff-ksp_ksp_tests-ex49_superlu_dist+nsize-4herm-1_conv-0
>>>>>>>>> ok ksp_ksp_tests-ex49_superlu_dist+nsize-4herm-1_conv-1
>>>>>>>>> ok diff-ksp_ksp_tests-ex49_superlu_dist+nsize-4herm-1_conv-1
>>>>>>>>> TEST
>>>>>>>>> arch-linux2-c-opt-ompi/tests/counts/ksp_ksp_tutorials-ex50_tut_2.counts
>>>>>>>>> ok ksp_ksp_tutorials-ex50_tut_2
>>>>>>>>> ok diff-ksp_ksp_tutorials-ex50_tut_2
>>>>>>>>> TEST
>>>>>>>>> arch-linux2-c-opt-ompi/tests/counts/ksp_ksp_tests-ex33_superlu_dist.counts
>>>>>>>>> ok ksp_ksp_tests-ex33_superlu_dist
>>>>>>>>> ok diff-ksp_ksp_tests-ex33_superlu_dist
>>>>>>>>> TEST
>>>>>>>>> arch-linux2-c-opt-ompi/tests/counts/snes_tutorials-ex56_hypre.counts
>>>>>>>>> ok snes_tutorials-ex56_hypre
>>>>>>>>> ok diff-snes_tutorials-ex56_hypre
>>>>>>>>> TEST
>>>>>>>>> arch-linux2-c-opt-ompi/tests/counts/ksp_ksp_tutorials-ex56_2.counts
>>>>>>>>> ok ksp_ksp_tutorials-ex56_2
>>>>>>>>> ok diff-ksp_ksp_tutorials-ex56_2
>>>>>>>>> TEST
>>>>>>>>> arch-linux2-c-opt-ompi/tests/counts/snes_tutorials-ex17_3d_q3_trig_elas.counts
>>>>>>>>> ok snes_tutorials-ex17_3d_q3_trig_elas
>>>>>>>>> ok diff-snes_tutorials-ex17_3d_q3_trig_elas
>>>>>>>>> TEST
>>>>>>>>> arch-linux2-c-opt-ompi/tests/counts/snes_tutorials-ex12_quad_hpddm_reuse_threshold_baij.counts
>>>>>>>>> ok snes_tutorials-ex12_quad_hpddm_reuse_threshold_baij
>>>>>>>>> ok diff-snes_tutorials-ex12_quad_hpddm_reuse_threshold_baij
>>>>>>>>> TEST
>>>>>>>>> arch-linux2-c-opt-ompi/tests/counts/ksp_ksp_tutorials-ex5_superlu_dist_3.counts
>>>>>>>>> not ok ksp_ksp_tutorials-ex5_superlu_dist_3 # Error code: 1
>>>>>>>>> # srun: error: Unable to create step for job 1426755: More
>>>>>>>>> processors requested than permitted
>>>>>>>>> ok ksp_ksp_tutorials-ex5_superlu_dist_3 # SKIP Command failed so no
>>>>>>>>> diff
>>>>>>>>> TEST
>>>>>>>>> arch-linux2-c-opt-ompi/tests/counts/ksp_ksp_tutorials-ex5f_superlu_dist.counts
>>>>>>>>> ok ksp_ksp_tutorials-ex5f_superlu_dist # SKIP Fortran required for
>>>>>>>>> this test
>>>>>>>>> TEST
>>>>>>>>> arch-linux2-c-opt-ompi/tests/counts/snes_tutorials-ex12_tri_parmetis_hpddm_baij.counts
>>>>>>>>> ok snes_tutorials-ex12_tri_parmetis_hpddm_baij
>>>>>>>>> ok diff-snes_tutorials-ex12_tri_parmetis_hpddm_baij
>>>>>>>>> TEST
>>>>>>>>> arch-linux2-c-opt-ompi/tests/counts/snes_tutorials-ex19_tut_3.counts
>>>>>>>>> ok snes_tutorials-ex19_tut_3
>>>>>>>>> ok diff-snes_tutorials-ex19_tut_3
>>>>>>>>> TEST
>>>>>>>>> arch-linux2-c-opt-ompi/tests/counts/snes_tutorials-ex17_3d_q3_trig_vlap.counts
>>>>>>>>> ok snes_tutorials-ex17_3d_q3_trig_vlap
>>>>>>>>> ok diff-snes_tutorials-ex17_3d_q3_trig_vlap
>>>>>>>>> TEST
>>>>>>>>> arch-linux2-c-opt-ompi/tests/counts/ksp_ksp_tutorials-ex5f_superlu_dist_3.counts
>>>>>>>>> ok ksp_ksp_tutorials-ex5f_superlu_dist_3 # SKIP Fortran required for
>>>>>>>>> this test
>>>>>>>>> TEST
>>>>>>>>> arch-linux2-c-opt-ompi/tests/counts/snes_tutorials-ex19_superlu_dist.counts
>>>>>>>>> ok snes_tutorials-ex19_superlu_dist
>>>>>>>>> ok diff-snes_tutorials-ex19_superlu_dist
>>>>>>>>> TEST
>>>>>>>>> arch-linux2-c-opt-ompi/tests/counts/snes_tutorials-ex56_attach_mat_nearnullspace-1_bddc_approx_hypre.counts
>>>>>>>>> ok snes_tutorials-ex56_attach_mat_nearnullspace-1_bddc_approx_hypre
>>>>>>>>> ok
>>>>>>>>> diff-snes_tutorials-ex56_attach_mat_nearnullspace-1_bddc_approx_hypre
>>>>>>>>> TEST
>>>>>>>>> arch-linux2-c-opt-ompi/tests/counts/ksp_ksp_tutorials-ex49_hypre_nullspace.counts
>>>>>>>>> ok ksp_ksp_tutorials-ex49_hypre_nullspace
>>>>>>>>> ok diff-ksp_ksp_tutorials-ex49_hypre_nullspace
>>>>>>>>> TEST
>>>>>>>>> arch-linux2-c-opt-ompi/tests/counts/snes_tutorials-ex19_superlu_dist_2.counts
>>>>>>>>> ok snes_tutorials-ex19_superlu_dist_2
>>>>>>>>> ok diff-snes_tutorials-ex19_superlu_dist_2
>>>>>>>>> TEST
>>>>>>>>> arch-linux2-c-opt-ompi/tests/counts/ksp_ksp_tutorials-ex5_superlu_dist_2.counts
>>>>>>>>> not ok ksp_ksp_tutorials-ex5_superlu_dist_2 # Error code: 1
>>>>>>>>> # srun: error: Unable to create step for job 1426755: More
>>>>>>>>> processors requested than permitted
>>>>>>>>> ok ksp_ksp_tutorials-ex5_superlu_dist_2 # SKIP Command failed so no
>>>>>>>>> diff
>>>>>>>>> TEST
>>>>>>>>> arch-linux2-c-opt-ompi/tests/counts/snes_tutorials-ex56_attach_mat_nearnullspace-0_bddc_approx_hypre.counts
>>>>>>>>> ok snes_tutorials-ex56_attach_mat_nearnullspace-0_bddc_approx_hypre
>>>>>>>>> ok
>>>>>>>>> diff-snes_tutorials-ex56_attach_mat_nearnullspace-0_bddc_approx_hypre
>>>>>>>>> TEST
>>>>>>>>> arch-linux2-c-opt-ompi/tests/counts/ksp_ksp_tutorials-ex64_1.counts
>>>>>>>>> ok ksp_ksp_tutorials-ex64_1
>>>>>>>>> ok diff-ksp_ksp_tutorials-ex64_1
>>>>>>>>> TEST
>>>>>>>>> arch-linux2-c-opt-ompi/tests/counts/ksp_ksp_tutorials-ex5_superlu_dist.counts
>>>>>>>>> not ok ksp_ksp_tutorials-ex5_superlu_dist # Error code: 1
>>>>>>>>> # srun: error: Unable to create step for job 1426755: More
>>>>>>>>> processors requested than permitted
>>>>>>>>> ok ksp_ksp_tutorials-ex5_superlu_dist # SKIP Command failed so no
>>>>>>>>> diff
>>>>>>>>> TEST
>>>>>>>>> arch-linux2-c-opt-ompi/tests/counts/ksp_ksp_tutorials-ex5f_superlu_dist_2.counts
>>>>>>>>> ok ksp_ksp_tutorials-ex5f_superlu_dist_2 # SKIP Fortran required for
>>>>>>>>> this test
>>>>>>>>>
>>>>>>>>>> Barry
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>> On Mar 10, 2021, at 11:03 PM, Eric Chamberland
>>>>>>>>>>> <[email protected]
>>>>>>>>>>> <mailto:[email protected]>> wrote:
>>>>>>>>>>>
>>>>>>>>>>> Barry,
>>>>>>>>>>>
>>>>>>>>>>> to get a some follow up on --with-openmp=1 failures, shall I open
>>>>>>>>>>> gitlab issues for:
>>>>>>>>>>>
>>>>>>>>>>> a) all hypre failures giving DIVERGED_INDEFINITE_PC
>>>>>>>>>>>
>>>>>>>>>>> b) all superlu_dist failures giving different results with initia
>>>>>>>>>>> and "Exceeded timeout limit of 60 s"
>>>>>>>>>>>
>>>>>>>>>>> c) hpddm failures "free(): invalid next size (fast)" and
>>>>>>>>>>> "Segmentation Violation"
>>>>>>>>>>>
>>>>>>>>>>> d) all tao's "Exceeded timeout limit of 60 s"
>>>>>>>>>>>
>>>>>>>>>>> I don't see how I could do all these debugging by myself...
>>>>>>>>>>>
>>>>>>>>>>> Thanks,
>>>>>>>>>>>
>>>>>>>>>>> Eric
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>
>>>>>>>> --
>>>>>>>> Eric Chamberland, ing., M. Ing
>>>>>>>> Professionnel de recherche
>>>>>>>> GIREF/Université Laval
>>>>>>>> (418) 656-2131 poste 41 22 42
>>>>>>> --
>>>>>>> Eric Chamberland, ing., M. Ing
>>>>>>> Professionnel de recherche
>>>>>>> GIREF/Université Laval
>>>>>>> (418) 656-2131 poste 41 22 42
>>>>>>> <fedora_mkl_and_devtools.txt><openmpi.txt><petsc.txt>
>>>>>>
>>>>>
>>>>
>>> --
>>> Eric Chamberland, ing., M. Ing
>>> Professionnel de recherche
>>> GIREF/Université Laval
>>> (418) 656-2131 poste 41 22 42
>>
> --
> Eric Chamberland, ing., M. Ing
> Professionnel de recherche
> GIREF/Université Laval
> (418) 656-2131 poste 41 22 42
