MPI

Description

The module containing all MPI classes and constants

Methods

Informational Methods

MPI.wtime()

Returns a double precision floating-point number that is the time in seconds since some arbitrary point of time in the past. The point is guaranteed not to change during the lifetime of the process.

C equivalent: MPI_Wtime()

MPI.wtick()

Returns a double precision floating-point number that is the time in seconds between successive ticks of the clock.

C equivalent: MPI_Wtick()

MPI.initialized?()

Returns true if MPI has been initialized. (Note that because of the runtime system of MPI Ruby, this will always return true.)

C equivalent: MPI_Initialized()

MPI.processor_name()

Returns the processor name of the current processor.

C equivalent: MPI_Get_processor_name()

MPI.dims_create(nnodes, dims)

Returns an array containing cartesian dimensions suitable for use with MPI::Comm#cart_create(). nnodes is an integer specifying the total number of processes. The array dims should have length equal to the desired number of dimensions and should contain integers. If an entry i in dims is positive, the i-th entry in the returned array will be precisely dims[i]. If dims[i] is 0, the corresponding entry in the returned array will be determined by the method. A negative entry in dims is incorrect.

C equivalent: MPI_Dims_create()

Constants

MPI::UNDEFINED

An opaque value that is used by various methods to specify that a value is
undefined.