Trouble Shooting¶

Here we provide a list of common problems and their solutions.

If you have a problem that is not listed or clearly explained by an error message, please create a ticket on our gitlab page.

My application crashes with a segmentation fault shortly after its launch¶

This could be due to having compiled with OpenMP, but not setting the following ulimit before launching your application, resulting in too little memory per core:

ulimit -s unlimited

My application is unexpectedly slow¶

There could be many reasons for this to happen, here are some tips to make your application faster:

• Make sure you compiled using appropriate optimisation flags (see Optimisation).
• Check if you need the resolution of output grid, number of particles, and timestep you are currently using and reduce these where possible. For an explanation of all options, see Configuration.
• Use more OpenMP threads when running your application.
• Make sure to set the following options in your command line (or submit script if you use one) before launching your application:

export OMP_PLACES=cores
export OMP_PROC_BIND=true