GoMPI: Message Passing Interface for Parallel Computing

The gompi package is a lightweight wrapper to the OpenMPI C++ library designed to develop algorithms for parallel computing.

GoMPI is a fork of the gosl MPI library with additional methods.

Installation

1. install OpenMPI for your system
2. ensure golang.org/x/tools/cmd/stringer is installed (go get if not)
3. run make install

(Other make options include test, build, and clean.)

Performance

The latency benchmarks are as follows (note: the Go benchmark does not test a message size of zero bytes):

message size (bytes)	GoMPI (µs)	OSU MPI Latency Test v5.8 (µs)
0	n/a	0.36
1	0.45	0.33
2	0.45	0.32
4	0.42	0.31
8	0.45	0.30
16	0.43	0.32
32	0.43	0.32
64	0.43	0.32
128	0.45	0.35
256	0.47	0.37
512	0.60	0.41
1024	0.66	0.34
2048	0.74	0.45
4096	2.01	1.51
8192	2.75	1.82
16384	3.61	2.36
32768	4.83	3.32
65536	9.24	4.96
131072	17.15	10.53
262144	31.09	23.07
524288	57.01	43.78
1048576	117.72	84.43
2097152	235.34	220.47
4194304	599.43	619.64

Benchmark code may be found in cmd/latency.go.