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
# ------------------------------------------------------------------------------
#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

(...)

# ------------------------------------------------------------------------------
# OVERWRITE_EXISTING_XXX_CODE=1 -> setup_cocoa overwrites existing PACKAGES ----
# overwrite: delete the existing PACKAGE folder and install it again -----------
# redownload: delete the compressed file and download data again ---------------
# These keys are only relevant if you run setup_cocoa multiple times -----------
# ------------------------------------------------------------------------------
(...)
export OVERWRITE_EXISTING_COSMOLIKE_CODE=1 # dangerous (possible lost of uncommit work)
                                           # if unset, users must manually delete
                                           # project if wants setup_cocoa to reclone it

(...)

# ------------------------------------------------------------------------------
# Cosmolike projects below -------------------------------------------
# ------------------------------------------------------------------------------
(...)
export ROMAN_REAL_URL="https://github.com/CosmoLike/cocoa_roman_real.git"
export ROMAN_REAL_NAME="roman_real"
#BRANCH: if unset, load the latest commit on the specified branch
#export ROMAN_REAL_BRANCH="main"
#COMMIT: if unset, load the specified commit
export ROMAN_REAL_COMMIT="23a774c32480b7b4bd5da5f637270310bc88f86c"
#BRANCH: if unset, load the specified TAG
#export ROMAN_REAL_TAG="v4.0-beta17"

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

or (in case users just want to compile roman_real project)

  source ./projects/roman_real/scripts/compile_roman_real.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_real 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_real/EXAMPLE_EVALUATE1.yaml -f

MCMC:

  mpirun -n 4 --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_real/EXAMPLE_MCMC1.yaml -f