aquila-borg 2.1.1

ARES/BORG engine packaged in a Python module

Please check the individual source files for the respective contributors.

Version 2.1

Description

This is the main component of the Bayesian Large Scale Structure inference pipeline.

A lot of complementary informations are available on the wiki https://www.aquila-consortium.org/.

Cloning all the modules

The ARES software is only the foundation for other modules that adds many more functionalities to the framework.

Notably, the Aquila collaboration has developped the BORG extension that encodes advanced forward model and complex likelihoods to run inferences on galaxy clustering, lyman-alpha, and more.

To get access to the extra modules please contact Aquila consortium members, who will tell you what are the policy in places. Once your account on bitbucket is authorized you may use the script get-aquila-modules.sh. The procedure is as follow:

• first change to the desired branch (i.e. develop/2.1) with git checkout the_interesting_branch

• clone all the adequate modules get-aquila-modules.sh –clone

• setup the branches for the modules get-aquila-modules.sh –branch-set

• Polish up your environment by installing the git hooks get-aquila-modules.sh –hooks

NOTE the git hook require the availability clang-format to check on the formatting. If it is not present, then it will fail the execution.

Building

There is a special command line that prepares prepares build system to compile all tools and libraries. It resides in the root directory of the ares source tree and is called “build.sh”. By default it will build everything in the “build” subdirectory. To get all the options please run with the option “–help”.

After the tool has bee run, you can move to the build directory and execute “make”, which will build everything.

Please pay attention warnings and error messages. The most important are color marked. Notably some problems may occur if two versions of the same compiler are used for C and C++. To adjust that it is sufficient to explicitly specify the compiler path with the options ‘–c-compiler’ and ‘–cxx-compiler’ of “build.sh”.

Note: When modules are present in extra/, you may prevent them from building by putting an empty file called DO_NOT_BUILD in the corresponding directory folder of the concerned module. For example, to prevent borg from building do touch extra/borg/DO_NOT_BUILD from the present directory and the build system will ignore borg.

Compiler compatibilities

Tested on GCC 7.0 - 10.2. Some performance regressions were noted with gcc 8.1. Countermeasures have been introduced though some corner cases may still be a bit slower. Clang is unaffected by this regression.

Note that GCC <= 6 fails because it does not support correctly C++14 features.

Documentation

Please refer to docs/README.txt.

The documentation is also available on https://docs.aquila-consortium.org/borg-public/2.1/

Modules

The core package supports to have extensions statically linked to the core. They have to be put in extra/ and the cmake scripts will automatically link to it. Check ‘extra/demo/’ for an example.

Usage policy

Please check the documentation for details on the citation requirements for using this software: https://www.aquila-consortium.org/docs/borg-public/2.1/.

Acknowledgements

This work has been funded by the following grants and institutions over the years:

• the DFG cluster of excellence “Origin and Structure of the Universe” (http://www.universe-cluster.de).

• Institut Lagrange de Paris (grant ANR-10-LABX-63, http://ilp.upmc.fr) within the context of the Idex SUPER subsidized by the French government through the Agence Nationale de la Recherche (ANR-11-IDEX-0004-02).

• BIG4 (ANR-16-CE23-0002) (https://big4.iap.fr)

• The “Programme National de Cosmologie et Galaxies” (PNCG, CNRS/INSU)

• Through the grant code ORIGIN, it has received support from the “Domaine d’Interet Majeur (DIM) Astrophysique et Conditions d’Apparitions de la Vie (ACAV)” from Ile-de-France region.