This is a pre-release version of the reference code for the upcoming GAP Benchmark Suite. It is designed to be a portable high-performance baseline that only requires a compiler with support for C++11. For parallelism it uses OpenMP, but it can also be compiled to run serially without OpenMP. The details of the benchmark can be found in the draft specification.

• Breadth-First Search (BFS)
• Single-Source Shortest Paths (SSSP)
• PageRank (PR)
• Connected Components (CC)
• Betweenness Centrality (BC)
• Triangle Counting (TC)

Build the project:

$ make

Override the default C++ compiler:

$ CXX=g++-4.9 make

Test the build:

$ make test

Run BFS on 1,024 vertices for 1 iteration:

$ ./bfs -g 10 -n 1

Additional command line flags can be found with -h

All of the binaries use the same command-line options for loading graphs:

• -g 20 generates a Kronecker graph with 2^20 vertices (Graph500 specifications)
• -u 20 generates a uniform random graph with 2^20 vertices (degree 16)
• -f graph.el loads graph from file graph.el
• -sf graph.el symmetrizes graph loaded from file graph.el

The graph loading infrastructure understands the following formats:

• .el plain-text edge-list with an edge per line as node1 node2
• .wel plain-text weighted edge-list with an edge per line as node1 node2 weight
• .gr 9th DIMACS Implementation Challenge format
• .graph Metis format (used in 10th DIMACS Implementation Challenge)
• .mtx Matrix Market format
• .sg serialized pre-built graph (use converter to make)
• .wsg weighted serialized pre-built graph (use converter to make)

• Release integration support for OpenTuner
• Scripts to perform official benchmark runs

Please cite this code by the benchmark specification:

Scott Beamer, Krste Asanović, David Patterson. The GAP Benchmark Suite. arXiv:1508.03619 [cs.DC], 2015.