ptolemy.domains.psdf.kernel
Class PSDFDirector
java.lang.Object
ptolemy.kernel.util.NamedObj
ptolemy.kernel.util.Attribute
ptolemy.actor.Director
ptolemy.actor.sched.StaticSchedulingDirector
ptolemy.domains.sdf.kernel.SDFDirector
ptolemy.domains.psdf.kernel.PSDFDirector
- All Implemented Interfaces:
- java.io.Serializable, java.lang.Cloneable, Executable, Initializable, PeriodicDirector, Changeable, Debuggable, DebugListener, Derivable, ModelErrorHandler, MoMLExportable, Moveable, Nameable
public class PSDFDirector
- extends SDFDirector
The Parameterized Synchronous Dataflow (PSDF) domain is an
extension of the Synchronous Dataflow (SDF) domain that allows for
more extensive reconfiguration of models. The SDF domain uses
static analysis of variable dependence to detect cases where rate
parameters may change. By default, SDF disallows reconfiguration
of all rate parameters. If rate parameters are allowed to change,
then SDF checks that rate parameters do not change during execution
of the schedule, and declares that inferred rate parameters for
external ports change as often as the internal rate parameters.
This domain offers two key extensions:
- Dependence analysis is used to determine if the modification to the
rate parameters occurs during execution of the SDF schedule. If
this test passes, then a parameterized schedule is constructed.
- The generated schedule is checked for local synchrony, to determine
if external rate parameters may change. The correct dependency
information for external ports is then declared.
Note that the resulting behavior is identical to the SDF scheduler,
with rate parameter changes allowed, except much more efficient, since
scheduling on the fly is not necessary during every reconfiguration.
Additionally, code can be generated for the PSDF domain that allows
for efficient reconfiguration. The added precision of dependency analysis
for external rate parameters also means that some hierarchical models that
would be ruled out by the SDF checks are allowed.
- Since:
- Ptolemy II 3.1
- Version:
- $Id: PSDFDirector.java 57040 2010-01-27 20:52:32Z cxh $
- Author:
- Steve Neuendorffer
- See Also:
PSDFScheduler,
Serialized Form
- Accepted Rating:
- Proposed Rating:
| Fields inherited from class ptolemy.kernel.util.NamedObj |
_changeListeners, _changeLock, _changeRequests, _debugging, _debugListeners, _elementName, _isPersistent, _verbose, _workspace, ATTRIBUTES, CLASSNAME, COMPLETE, CONTENTS, DEEP, FULLNAME, LINKS |
|
Constructor Summary |
PSDFDirector()
Construct a director in the default workspace with an empty string
as its name. |
PSDFDirector(CompositeEntity container,
java.lang.String name)
Construct a director in the given container with the given
name. |
PSDFDirector(Workspace workspace)
Construct a director in the workspace with an empty name. |
|
Method Summary |
private void |
_init()
Initialize the object. |
void |
invalidateSchedule()
Indicate that a schedule for the model may no longer be valid. |
| Methods inherited from class ptolemy.domains.sdf.kernel.SDFDirector |
attributeChanged, clone, createSchedule, fireAt, getModelNextIterationTime, initialize, newReceiver, periodValue, postfire, prefire, preinitialize, suggestedModalModelDirectors, supportMultirateFiring, transferInputs, transferOutputs |
| Methods inherited from class ptolemy.actor.Director |
_description, _fireContainerAt, _isEmbedded, _isTopLevel, _transferInputs, _transferOutputs, addInitializable, defaultDependency, finish, fireAt, fireAtCurrentTime, getCausalityInterface, getCurrentTime, getErrorTolerance, getGlobalTime, getModelStartTime, getModelStopTime, getModelTime, getNextIterationTime, getStartTime, getStopTime, getTimeResolution, implementsStrictActorSemantics, initialize, invalidateResolvedTypes, isFireFunctional, isStopRequested, isStrict, iterate, preinitialize, removeInitializable, requestInitialization, setContainer, setCurrentTime, setModelTime, stop, stopFire, terminate, wrapup |
| Methods inherited from class ptolemy.kernel.util.Attribute |
_checkContainer, _getContainedObject, _propagateExistence, getContainer, moveDown, moveToFirst, moveToIndex, moveToLast, moveUp, setName, updateContent |
| Methods inherited from class ptolemy.kernel.util.NamedObj |
_addAttribute, _adjustOverride, _attachText, _cloneFixAttributeFields, _debug, _debug, _debug, _debug, _debug, _exportMoMLContents, _getIndentPrefix, _isMoMLSuppressed, _markContentsDerived, _propagateValue, _recordDecoratedAttributes, _removeAttribute, _splitName, _stripNumericSuffix, _validateSettables, addChangeListener, attributeList, attributeList, attributeTypeChanged, clone, containedObjectsIterator, deepContains, depthInHierarchy, description, description, event, executeChangeRequests, exportMoML, exportMoML, exportMoML, exportMoML, exportMoML, exportMoMLPlain, getAttribute, getAttribute, getAttributes, getChangeListeners, getClassName, getDecoratorAttribute, getDecoratorAttributes, getDerivedLevel, getDerivedList, getDisplayName, getElementName, getFullName, getModelErrorHandler, getName, getName, getPrototypeList, getSource, handleModelError, isDeferringChangeRequests, isOverridden, isPersistent, lazyContainedObjectsIterator, message, propagateExistence, propagateValue, propagateValues, removeChangeListener, requestChange, setClassName, setDeferringChangeRequests, setDerivedLevel, setDisplayName, setModelErrorHandler, setPersistent, setSource, sortContainedObjects, toplevel, toString, uniqueName, validateSettables, workspace |
| Methods inherited from class java.lang.Object |
equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
PSDFDirector
public PSDFDirector()
throws IllegalActionException,
NameDuplicationException
- Construct a director in the default workspace with an empty string
as its name. The director is added to the list of objects in
the workspace. Increment the version number of the workspace.
The PSDFDirector will have a default scheduler of type PDFScheduler.
- Throws:
IllegalActionException - If the name has a period in it, or
the director is not compatible with the specified container.
NameDuplicationException - If the container already contains
an entity with the specified name.
PSDFDirector
public PSDFDirector(Workspace workspace)
throws IllegalActionException,
NameDuplicationException
- Construct a director in the workspace with an empty name.
The director is added to the list of objects in the workspace.
Increment the version number of the workspace.
The PSDFDirector will have a default scheduler of type PDFScheduler.
- Parameters:
workspace - The workspace for this object.
- Throws:
IllegalActionException - If the name has a period in it, or
the director is not compatible with the specified container.
NameDuplicationException - If the container already contains
an entity with the specified name.
PSDFDirector
public PSDFDirector(CompositeEntity container,
java.lang.String name)
throws IllegalActionException,
NameDuplicationException
- Construct a director in the given container with the given
name. The container argument must not be null, or a
NullPointerException will be thrown. If the name argument is
null, then the name is set to the empty string. Increment the
version number of the workspace. The PSDFDirector will have a
default scheduler of type PSDFScheduler.
- Parameters:
container - Container of the director.name - Name of this director.
- Throws:
IllegalActionException - If the director is not compatible
with the specified container. May be thrown in a derived class.
NameDuplicationException - If the container is not a
CompositeActor and the name collides with an entity in the container.
invalidateSchedule
public void invalidateSchedule()
- Indicate that a schedule for the model may no longer be valid.
This method should be called when topology changes are made,
or for that matter when any change that may invalidate the
schedule is made. In this base class, this method sets a flag
that forces scheduling to be redone at the next opportunity.
If there is no scheduler, do nothing.
- Overrides:
invalidateSchedule in class StaticSchedulingDirector
_init
private void _init()
throws IllegalActionException,
NameDuplicationException
- Initialize the object. In this case, we give the PSDFDirector a
default scheduler of the class PSDFScheduler.
- Throws:
IllegalActionException
NameDuplicationException