Running Cosmolike projects (Basic instructions)

From Cocoa/Readme instructions:

Note

We provide several cosmolike projects that can be loaded and compiled using setup_cocoa.sh and compile_cocoa.sh scripts. To activate them, comment the following lines on set_installation_options.sh

[Adapted from Cocoa/set_installation_options.sh shell script] 
# The keys below control which cosmolike projects will be installed and compiled 
# inset # symbol in the lines below (i.e., unset these environmental keys)
#export IGNORE_COSMOLIKE_LSSTY1_CODE=1
export IGNORE_COSMOLIKE_DES_Y3_CODE=1
export IGNORE_COSMOLIKE_ROMAN_FOURIER_CODE=1
export IGNORE_COSMOLIKE_ROMAN_REAL_CODE=1

If users comment these lines (unsetting the corresponding IGNORE keys) after running setup_cocoa.sh and compile_cocoa.sh, there is no need to rerun these general scripts, which would reinstall many packages (slow). Instead, run the following three commands:

 source start_cocoa.sh

and

 source ./installation_scripts/setup_cosmolike_projects.sh

and

  source ./installation_scripts/compile_all_projects.sh

To run the example

Step 1️⃣: activate the cocoa Conda environment, and the private Python environment

  conda activate cocoa

and

  source start_cocoa.sh

Step 2️⃣: Select the number of OpenMP cores (below, we set it to 8).

export OMP_PROC_BIND=close; export OMP_NUM_THREADS=8

Step 3️⃣: The folder projects/roman_fourier contains examples. So, run the cobaya-run on the first example following the commands below.

One model evaluation:

   mpirun -n 1 --oversubscribe --mca pml ^ucx --mca btl vader,tcp,self --bind-to core:overload-allowed --rank-by slot --map-by numa:pe=${OMP_NUM_THREADS} cobaya-run ./projects/roman_fourier/EXAMPLE_EVALUATE1.yaml -f

MCMC:

  mpirun -n 1 --oversubscribe --mca pml ^ucx --mca btl vader,tcp,self --bind-to core:overload-allowed --rank-by slot --map-by numa:pe=${OMP_NUM_THREADS} cobaya-run ./projects/roman_fourier/EXAMPLE_MCMC1.yaml -f