Re: [Users] a problem met in running the sample code "Binary, inspiraling neutron stars forming a hypermassive neutron star" on Jimmy's own work station

Hello Jimmy,

the error is the level 0 warning at the end of the err file:

--8<-- WARNING level 0 from host dell-Precision-7920-Tower process 0 while executing schedule bin BoundaryConditions, routine RotatingSymmetry180::Rot180_ApplyBC in thorn RotatingSymmetry180, file /home/bai/ET/Cactus/configs/sim/build/RotatingSymmetry180/rotatingsymmetry180.c:492: -> TAT/Slab can only be used if there is a single local component per MPI process cactus_sim: /home/bai/ET/Cactus/configs/sim/build/Carpet/helpers.cc:275: int Carpet::Abort(const cGH*, int): Assertion `0' --8<--

namely "TAT/Slab can only be used if there is a single local component per MPI process".

To avoid this you will have to use more than 1 MPI ranks (the technical description is a bit complicated).

When using simulation factory you must ensure that the values for --procs / --cores (total number of threads created) and --num-threads (number of threads per MPI rank) are such that there are at least 2 MPI ranks.

Eg:

./simfactory/bin/sim submit --cores 12 --num-threads 6 ...

or when using mpirun directly the equivalent would be:

export OMP_NUM_THREADS=6 mpirun -n 2 ...

Yours, Roland

Hello, I met a problem when running the sample code "Binary, inspiraling neutron stars forming a hypermassive neutron star" in ET's gallery on my own work station and I'm looking forward to your help. It aborts unexpectedly after running a few minutes. The end of the Output-error-file reads as follows:

cactus_sim: /home/bai/ET/Cactus/configs/sim/build/Carpet/helpers.cc:275: int Carpet::Abort(const cGH*, int): Assertion `0' failed.
Rank 0 with PID 73447 received signal 6
Writing backtrace to nsnstohmns/backtrace.0.txt
Aborted (core dumped)

I also uploaded the entire error file for clearance.

I built the ET using 64 processors by using the following command:
simfactory/bin/sim build -j64 --thornlist thornlists/nsnstohmns.th

and I ran the simulation using 20 processors by using the following command:
./simfactory/bin/sim create-submit bns_merger /home/bai/ET/Cactus/par/nsnstohmns.par 20 24:0:0

Yours sincerely: Jimmy