Name: branson
Owner: Los Alamos National Laboratory
Description: A Monte Carlo transport mini-app for studying new parallel algorithms
Created: 2017-04-04 21:34:42.0
Updated: 2018-05-07 19:21:17.0
Pushed: 2018-05-07 19:22:53.0
Homepage:
Size: 516
Language: C++
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README
Branson
So you've decided to use Branson…
Here are some things to know:
- Branson is not an acronym.
- Branson requires MPI 3.0+, Boost (headers only), Metis and ParMetis.
- The point of Branson is to study different algorithms for parallel
Monte Carlo transport. Currently it contains particle passing and
mesh passing methods for domain decomposition.
- Many of the parameters that impact parallel performance can be set in the
input file.
- The input file format is ugly right now and I don't have a good list of
parameters and what they do. Sorry.
- Input files are in XML, which makes them easy to generate and change in
python.
- Input files are complicated when you want to have multiple spatial regions
but are pretty simple otherwise.
Installing Branson:
- Branson uses CMake. The main CMakelist file is in the src directory.
- There is only one CMake user option right now: “CMAKE_BUILD_TYPE” which
can be set on the command line with “DCMAKE_BUILD_TYPE=” and
the default is release.
- Visualization is optional and will be turned on if HDF5 and SILO libraries
are found by CMake
Fake Multigrop Branson:
- The clean_mg branch has a new capability that mimics the data flow in real
multigroup transport.
- This branch sets the number of groups at the configure step in CMake. I know
this is messy from a usability standpoint but it makes the data layout very
easy to control when the number of groups is known at compile time. Use
the “N_GROUPS” CMake variable to set the number of groups (e.g. cmake
-DN_GROUPS=10 ../path/to/CMakeLists.txt).
- The code will still produce gray results! The physical value in each group
is the same and it's still set via the input deck.
- This branch samples a group with a uniform PDF (it does not weight the
opacity with a Planckian spectrum).
Authors
- Branson was written by Alex R. Long
- random123 is by D. E. Shaw Research, Copyright 2010-2011
- RNG.h uses code from Draco
Release
Branson is released under the BSD 3-Clause License. For more details see the
LICENSE.txt file.
LANL code designation: C17048
