Monthly Downloads: 7
Programming language: Haskell
License: BSD 3-clause "New" or "Revised" License
Tags: Parallelism     Control     Monads     Distributed Computing     Hdph    
Latest version: v0.2.3

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HdpH (Haskell distributed parallel Haskell) GitHub repository

Haskell distributed parallel Haskell (HdpH) is a Haskell DSL for parallel computation on distributed-memory architectures. HdpH is implemented entirely in Haskell but does make use of GHC extensions, most notably TemplateHaskell.

A recent paper [1] presents the semantics of HdpH and evaluates its implementation. There are also earlier design papers [2,3]. Sources for the related reliable HdpH-RS DSL can also be found on GitHub [4].

Repository structure

This repository largely follows the git branching model of [5].

  • The master branch publishes releases. Its HEAD is always the latest release, and it contains a directory releases with archived cabal packages.

  • The develop branch tracks development integration. Its HEAD is the latest development version.

  • Branches named feature-foo (where foo is a descriptive string) are for the development or fixing of feature foo. They branch off develop and are eventually merged back into develop (or abandoned).

  • Branches named test-bar (where bar is a descriptive string) are for testing wacky ideas. They branch off develop but are not meant to be merged back.

  • Branches named release-a.b.c (where a.b.c is a version number) prepare for releases. They branch off develop and are merged back into master and develop.

  • Branches named hotfix-a.b.c.d (a.b.c.d is a version number) prepare for off-cycle fixes of released code. They branch off master (version a.b.c) and are merged back master and develop.

  • Only branches master and develop are considered public.

Package hdph is the main HdpH source. It relies on auxiliary packages hdph-closure and hdph-mpi-allgather; the latter is only required when using MPI node discovery instead of UDP.

Consult HISTORY.txt for information about package and compiler dependencies.

Building HdpH

Detailed build instructions can be found in hdph/README.md and hdph/doc/INSTALL.txt.

Building the auxiliary package hdph-closure is straightforward. Building package hdph-mpi-allgather requires furnishing the cabal installer with the paths to MPI libraries and includes, see hdph-mpi-allgather/README.md for examples; the package has been built successfully with recent OpenMPI and MPICH libraries.


HdpH is not production software; use at your own risk (see LICENSE). Documentation may be out of date.

Related Projects


  1. Patrick Maier, Rob Stewart, Phil Trinder. The HdpH DSLs for Scalable Reliable Computation. Proc. 2014 ACM SIGPLAN Symposium on Haskell (Haskell 2014), pp 65-76. DOI 10.1145/2633357.2633363

  2. Patrick Maier, Rob Stewart, Phil Trinder. Reliable Scalable Symbolic Computation: The Design of SymGridPar2. Proc. 28th ACM Symposium On Applied Computing (SAC 2013), pp. 1677-1684.

  3. Patrick Maier, Phil Trinder. Implementing a High-level Distributed-Memory Parallel Haskell in Haskell. Proc. 23rd Intl. Symposium on the Implementation and Application of Functional Languages (IFL 2011), pp. 35-50.

  4. Rob Stewart. HdpH-RS development repository

  5. Vincent Driessen. A successful Git branching model

*Note that all licence references and agreements mentioned in the hdph README section above are relevant to that project's source code only.