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 Welcome to the cosmological hydrodynamical code
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    ______       _________________
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   \__ \| | /| / // // /_   / /   
  ___/ /| |/ |/ // // __/  / /    
 /____/ |__/|__/___/_/    /_/     
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 SPH With Inter-dependent Fine-grained Tasking
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 Website: www.swiftsim.com
 Twitter: @SwiftSimulation
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See INSTALL.swift for install instructions.
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Usage: swift [OPTION]... PARAMFILE
       swift_mpi [OPTION]... PARAMFILE
       swift_fixdt [OPTION]... PARAMFILE
       swift_fixdt_mpi [OPTION]... PARAMFILE
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Valid options are:
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  -a          Pin runners using processor affinity
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  -c          Run with cosmological time integration
  -d          Dry run. Read the parameter file, allocate memory but does not read 
              the particles from ICs and exit before the start of time integration.
              Allows user to check validy of parameter and IC files as well as memory limits.
  -e          Enable floating-point exceptions (debugging mode)
  -f    {int} Overwrite the CPU frequency (Hz) to be used for time measurements
  -g          Run with an external gravitational potential
  -G          Run with self-gravity
  -s          Run with SPH
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  -t    {int} The number of threads to use on each MPI rank. Defaults to 1 if not specified.
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  -v     [12] Increase the level of verbosity 1: MPI-rank 0 writes 
              2: All MPI-ranks write
  -y    {int} Time-step frequency at which task graphs are dumped
  -h          Print this help message and exit

See the file examples/parameter_example.yml for an example of parameter file.