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@LourensVeen LourensVeen released this 04 Mar 07:40
· 64 commits to develop since this release
0.8.0
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MUSCLE3 0.8.0

Documentation - GitHub

MUSCLE3 is the third incarnation of the Multiscale Coupling Library and Environment, and the successor to MUSCLE 2. Its purpose is to make creating coupled multiscale simulations easy, and to then enable efficient Uncertainty Quantification of such models using advanced semi-intrusive algorithms.

MUSCLE3 uses the Multiscale Modelling and Simulation Language (MMSL) to describe the structure of a multiscale model. MMSL can be expressed in the form of a diagram (gMMSL; not yet implemented) or as a YAML file (yMMSL; this is convenient both for people and for software). The MMSL lets one describe which components (submodels, scale bridges, data converters, UQ components, etc.) a multiscale model consist of, how many instances of each we need, and how they are wired together.

MUSCLE3 is intended to scale from your laptop to the exascale. At the low end, it supports a non-distributed but parallel mode in which an entire multiscale simulation, including all component implementations and the MMSL configuration, is in a single (short) Python file. Next is a distributed mode where the manager and component instances run on multiple nodes in a cluster, and communicate directly with one another. Beyond that, additional components and optimisations are envisioned that would allow scaling to huge machines or combinations of multiple machines. Our goal is to make the transitions between these modes as smooth as possible, so that extra compute power can be added gradually, as needed.

Added

  • Deadlock detection
  • MMSF validator
  • Configurable shell base environments
  • New native process management
  • Support for list-of-ints in settings
  • Support for MacOS 15 and Python 3.13

Improved

  • Legends outside of plot in profile plots
  • Increased data limit in profile timeline plot
  • Fixed compiling with GCC 14
  • Msgpack upgraded to >=3.2 to avoid bug in 3.1

Removed

  • Support for macOS 12

Thanks

  • Maarten at Ignition Computing for deadlock detection and the MMSF validator
  • Maarten and Rick at Ignition Computing for reporting bugs
  • David and Elisa for reporting issues
  • The ITER Organization (funding for Ignition Computing)
  • EUROfusion (funding for native process management and shell base environments)
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