Compiling the Einstein Toolkit

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The recommended way to compile the Einstein Toolkit is to use the Simulation Factory ("SimFactory").

Configuring SimFactory for your machine

The ET depends on various libraries, and needs to interact with machine-specific queueing systems and MPI implementations. As such, it needs to be configured for a given machine. For this, it uses SimFactory. Generally, configuring SimFactory means providing an optionlist, for specifying library locations and build options, a submit script for using the batch queueing system, and a runscript, for specifying how Cactus should be run, e.g. which mpirun command to use. For a cluster, a "machine definition file" is also required.

Supported clusters

SimFactory comes with support for many of the large supercomputers; run "simfactory/bin/sim list-machines" from your Cactus directory to see the currently-supported list of machines. If you are compiling on one of these, it should be sufficient to run

   simfactory/bin/sim setup

from your Cactus directory and answer the questions, and SimFactory will automatically detect the correct option list, submit script and run script.

Supported laptop/workstation operating systems

SimFactory also contains general support for specific operating systems commonly used on workstations or laptops, including Mac OS, Ubuntu, Cent OS and Scientific Linux. To configure SimFactory for one of these, you need to find the suitable files in simfactory/mdb/optionlists and simfactory/mdb/runscripts and specify their names on the sim setup command line. The following table lists the files that you need for each supported operating system:

Configuration files
Operating system Option list Run script Notes
Linux (inc. the Linux subsystem of Windows 10) generic.cfg
OS X (with MacPorts) osx-macports.cfg
OS X (with HomeBrew) osx-homebrew.cfg

You do not need to specify a submit script, as there is no queueing system on a workstation or laptop. For example, for Debian, after installing the packages listed in the offline tutorial,

   simfactory/bin/sim setup --optionlist=generic.cfg --runscript

will configure SimFactory for your machine.

Unsupported machines

If there is no existing optionlist or runscript (for a cluster, also a submit script) for your machine, you will need to write them yourself. It is recommended to start from one of the already-written files for another machine which is as close as possible to the machine you are trying to use. See Configuring a new machine for help with this. First, write the option list and run script, and run

   simfactory/bin/sim setup --optionlist=<optionlist> --runscript <runscript>

with the new configuration files. This will create a basic machine definition file in simfactory/mdb/machines named after your hostname. For a cluster, it is unlikely that this basic file will be enough, as SimFactory needs a lot of information about the details of the cluster.

Building the Einstein Toolkit

Assuming that SimFactory has been successfully set up on your machine, you should be able to build the Einstein Toolkit with

   simfactory/bin/sim build --thornlist path/to/