Utility

Utility data structures and functions

StopWatch(start, interval, callback)

Initialize a stopwatch.

Arguments

• start::Float64: initial time (in seconds)
• interval::Float64 : interval to click (in seconds)
• callback : callback function after each click (interval seconds)

function MPIbcast!(data::AbstractArray)

Broadcast data from MPI root to other nodes. data is an array.

function MPIbcast(data)

Broadcast data from MPI root to other nodes. data can be an array or a scalar. The root node its own data, and other nodes return the broadcasted data from the root.

function MPIreduce(data, op = MPI.SUM)

Reduce data from MPI workers to root with the operation op. data can be an array or a scalar. The root node returns the reduced data with the operation op, and other nodes return their own data.

function MPIreduce!(data::AbstractArray, op = MPI.SUM)

Reduce data from MPI workers to root with the operation op. data should be an array.

check(stopwatch, parameter...)

Check stopwatch. If it clicks, call the callback function with the unpacked parameter

Convenience function to disable all threading and assert that Julia threading is off as well.

Number of processors used in MPI. Can be called without ensuring initialization.