I don't know OpenMP, but I saw these in your configure
OMP_PROC_BIND = 'TRUE'
OMP_PLACES = '{0:24}'
Try not to do any binding and let OS freely schedule threads.
--Junchao Zhang
On Fri, Apr 7, 2023 at 7:17 PM Astor Piaz wrote:
> Thanks for your reply Matt.
>
> The problem seems to be th
I'm sorry I meant OpenMP threads are able to spawn MKL processes
On Fri, Apr 7, 2023 at 8:29 PM Dave May wrote:
>
>
> On Fri 7. Apr 2023 at 07:06, Astor Piaz wrote:
>
>> Hello petsc-users,
>> I am trying to use a code that is parallelized with a combination of
>> OpenMP and MKL parallelisms, wh
On Fri 7. Apr 2023 at 07:06, Astor Piaz wrote:
> Hello petsc-users,
> I am trying to use a code that is parallelized with a combination of
> OpenMP and MKL parallelisms, where OpenMP threads are able to spawn MPI
> processes.
>
Is this really the correct way to go?
Would it not be more suitabl
Thanks for your reply Matt.
The problem seems to be the MKL threads I just realized.
Inside the MatShell I call:
call omp_set_nested(.true.)
call omp_set_dynamic(.false.)
call mkl_set_dynamic(0)
Then, inside the omp single thread I use:
nMkl0 = mkl_set_num_threads_local(nMkl)
where nMkl is se
On Fri, Apr 7, 2023 at 2:26 PM Astor Piaz wrote:
> Hi Matthew, Jungchau,
> Thank you for your advice. The code still does not work, I give more
> details about it below, I can specify more about it as you wish.
>
> I am implementing a spectral method resulting in a block matrix where the
> off-di
> OpenMP threads are able to spawn MPI processes
I am curious why you have this usage. Is it because that you want a pure
OpenMP code (i.e., not MPI capable) to call petsc?
--Junchao Zhang
On Fri, Apr 7, 2023 at 9:06 AM Astor Piaz wrote:
> Hello petsc-users,
> I am trying to use a code that
On Fri, Apr 7, 2023 at 10:06 AM Astor Piaz wrote:
> Hello petsc-users,
> I am trying to use a code that is parallelized with a combination of
> OpenMP and MKL parallelisms, where OpenMP threads are able to spawn MPI
> processes.
> I have carefully scheduled the processes such that the right amoun
Hello petsc-users,
I am trying to use a code that is parallelized with a combination of OpenMP
and MKL parallelisms, where OpenMP threads are able to spawn MPI processes.
I have carefully scheduled the processes such that the right amount is
launched, at the right time.
When trying to use my code i
