org.apfloat.samples

Class PiDistributed.DistributedBinarySplittingPiCalculator

java.lang.Object

org.apfloat.samples.Pi.BinarySplittingPiCalculator

org.apfloat.samples.PiParallel.ParallelBinarySplittingPiCalculator

org.apfloat.samples.PiDistributed.DistributedBinarySplittingPiCalculator

All Implemented Interfaces:

Serializable

Enclosing class:

PiDistributed

protected static class PiDistributed.DistributedBinarySplittingPiCalculator
extends PiParallel.ParallelBinarySplittingPiCalculator

Distributed version of the binary splitting algorithm. Uses multiple computers to calculate pi in parallel.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
DistributedBinarySplittingPiCalculator(Pi.BinarySplittingSeries series) Construct a distributed pi calculator with the specified precision and radix.

Method Summary

Modifier and Type	Method and Description
PiDistributed.Node[]	getNodes() Get the available set of operation executor nodes.
void	r(long n1, long n2, ApfloatHolder T, ApfloatHolder Q, ApfloatHolder P, ApfloatHolder F, PiDistributed.Node[] nodes) Entry point for the distributed binary splitting algorithm.
PiDistributed.Node[]	recombineNodes(PiDistributed.Node[] nodes, int numberNeeded) Attempt to combine or split nodes to form the needed number of nodes.

Methods inherited from class org.apfloat.samples.PiParallel.ParallelBinarySplittingPiCalculator

r

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

DistributedBinarySplittingPiCalculator

public DistributedBinarySplittingPiCalculator(Pi.BinarySplittingSeries series)

Construct a distributed pi calculator with the specified precision and radix.

Parameters:

series - The binary splitting series to be used.

Method Detail

r

public void r(long n1,
              long n2,
              ApfloatHolder T,
              ApfloatHolder Q,
              ApfloatHolder P,
              ApfloatHolder F,
              PiDistributed.Node[] nodes)
       throws ApfloatRuntimeException

Entry point for the distributed binary splitting algorithm.

Parameters:

n1 - Start term.

n2 - End term.

T - Algorithm parameter.

Q - Algorithm parameter.

P - Algorithm parameter.

F - Pointer to inverse square root parameter.

nodes - The operation executors to be used for the calculation.

Throws:

ApfloatRuntimeException

getNodes

public PiDistributed.Node[] getNodes()

Get the available set of operation executor nodes. This implementation returns RemoteOperationExecutors, which execute operations on the cluster's nodes.

Returns:

The nodes of the cluster.

recombineNodes

public PiDistributed.Node[] recombineNodes(PiDistributed.Node[] nodes,
                                           int numberNeeded)

Attempt to combine or split nodes to form the needed number of nodes. The returned number of nodes is something between the number of nodes input and the number of nodes requested. The requested number of nodes can be less than or greater than the number of input nodes.

Parameters:

nodes - The nodes to recombine.

numberNeeded - The requested number of nodes.

Returns:

The set of recombined nodes.