Package jline.solvers.fj

Class FJFixedPoint

java.lang.Object

jline.solvers.fj.FJFixedPoint

public final class FJFixedPoint
extends Object

Solver-agnostic driver of the fork-join fixed point.

The transformation (ModelAdapter.mmt, or ht under options.config.fork_join) turns the model into a plain network in which every fork is a router, every join a zero-service delay, and the parallelism is carried by auxiliary open classes of arrival rate (fanout-1)*forkLambda. Each pass solves that network, recomputes the synchronisation delays from the resulting metrics and updates forkLambda; the loop ends when the queue lengths stop moving.

FJFixedPoint.InnerSolve is the inner solve. Nothing in the loop reads a solver internal, so any solver whose analyzer honours that contract can be driven here: SolverMVA passes its analyzer dispatch, SolverNC the normalizing-constant analyzers. Port of matlab/src/solvers/@NetworkSolver/fjFixedPoint.m.

The carrier is MVAResult: it is the shape the loop consumes (QN, UN, RN, TN, CN, XN, iter, logNormConstAggr, method), and reusing it keeps the loop body unchanged.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	FJFixedPoint.FJOutcome	Outcome of the fixed point: the merged metrics and the retained state.
static class	FJFixedPoint.FJState	State the fixed point retains across calls, as MATLAB keeps on the solver.
static interface	FJFixedPoint.InnerSolve	The inner solve of one pass of the fixed point.

Method Summary

Modifier and Type	Method	Description
static FJFixedPoint.FJOutcome	run(Network model, NetworkStruct sn, SolverOptions options, FJFixedPoint.FJState state, FJFixedPoint.InnerSolve fcn, long T0)	Runs the fork-join fixed point, or the inner solve once when the model has no fork.

Methods inherited from class java.lang.Object

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

Method Details

run

public static FJFixedPoint.FJOutcome run(Network model,
 NetworkStruct sn,
 SolverOptions options,
 FJFixedPoint.FJState state,
 FJFixedPoint.InnerSolve fcn,
 long T0)

Runs the fork-join fixed point, or the inner solve once when the model has no fork.

Parameters:

model - the model being solved

sn - its struct, already compiled

options - the solver options

state - the retained transformation cache and warm start

fcn - the inner solve

T0 - the wall-clock marker of the enclosing analyzer

Returns:

the merged metrics, the working struct and the updated state