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Yentl Van Tendeloo 2016-08-04 17:38:43 +02:00
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Version 2.4.0
+ Allow realtime interrupts on arbitrary ports
+ Allow realtime simulation to monitor specific ports
* Fixed bug while removing a port
* Fixed bug when adding a model during simulation
* Incremental update of direct connection
* Fixed external interrupts blocking internal transitions
* Set elapsed time attribute to None when you shouldn't access it
Version 2.3.1
+ Added nicer configuration for the optimized, minimal simulation kernel
Version 2.3.0
+ Added an optimized simulation kernel for sequentiel simulation
* Much faster direct connection algorithm
* Fixed bug in checkpointing when no state saving was being done
Version 2.2.4
+ Add setuptools installation
* Fixed bug in Dynamic Structure DEVS simulation for (dis)connectPorts
* Fixed bug in realtime simulation
* Fixed bug with checkpointing
* Restructured project
Version 2.2.3
* Fixed bug in the GVT algorithm where 'red' messages could be transient
* Changed termination detection algorithm to prevent bottlenecks
* Fixed missing import in realtime backend for exception handling
* Updated GVT test for previously reformed GVT algorithm
Version 2.2.2
* Changed realtime backend to not use threads in the 'threadless' variants
* Fixed elapsed attribute at initialisation
* Fixed allocator crashing due to new Z function support
* Fixed locking fairness for GVT setting (faster relocation/allocation)
* Fixed basic boundary relocator for when dynamic allocation
Version 2.2.1
+ Added user events in the loggers (optional) for 'state changes'
+ Allow continuing a previous simulation by calling simulate again
+ Added Z functions (output-to-input, input-to-input and output-to-output)
* Changed the reinit interface to make continuing possible
* Fixed massive memory leak by forgetting to set the
'temporaryIrreversible' flag in local simulation
* Change to the termination detection: wait for 100ms before sending
* Fixed complete horizon revertion (beyond GVT!)
* Activity-log file is only generated when useful
* ManualRelocator generates activity traces
Version 2.2.0
+ Added templates for scheduler, relocator, tracer and experiment files
+ Allow custom activity functions for pre-transition and post-transition
+ Allow the definition of custom schedulers, defined externally
+ Pass the horizon to the relocators
+ No state saving when relocation caused sequential simulation
+ Allow local checkpointing (in most cases)
+ Possibility for a 'test cycle' which saves message count (+visualize)
+ Test cycle simulation creates an 'advised' initial distribution
+ Schedulers can now be configured per-node instead of globally
+ Allow for pull based termination conditions (NOT recommended)
+ Tracers are a lot more plugable, multiple tracers can work simultaneous
+ Realtime interrupts can happen with method calls on the simulator
+ Initial allocation can be loaded from file
+ Allowed local nested simulation in a distributed simulation
+ Included a model of a subset of PythonPDEVS
+ Much faster tracing due to trace message grouping (remove all RTT calls)
+ Method to reset a models alterations before reinitialising it
+ Method to force sequential simulation
+ Ignore state saving when sequential simulation is possible due to
relocations
+ Added scaled realtime
+ Relocators can use a 'last state only' approach
* File reading for realtime happens on-demand
* Fixed GVT algorithm
* Fixed checkpoint restoration with severely broken files
* Rewrite of the realtime backend, works much better now
* Yielding of the main thread for anti-messages and relocations
* Split of the simulator configuration
* Various bugfixes
* External messages are processed differently, should give slight speedup
* Removal of (most) global variables
* Classic DEVS simulation bugfixes
- Removed auto-allocation: use the new 'allocators' instead
- Removed PyRO support
Version 2.1.5
+ Added optional memoization
+ Added the basis of an activity relocator, still very slow
+ User can choose between manual relocation, or automatic relocation
+ Relocation now uses 'async locking' and remote kernels will have a quick
stop feature to prevent many transitions that will simply be removed
+ Added Dirty Heap scheduler
+ Added 'discrete time' Scheduler
+ Added Minimal List scheduler
+ Progress bar visualizes when an error happens, process is now killable
+ Dynamic Structure DEVS added for local simulation
+ Added a polymorphic scheduler (still very unstable)
+ Activity tracking in distributed simulation now returns something usable
+ Added Classic DEVS simulation as an option
+ Added a random number generator for deterministic simulation
* Fixed deadlock in distributed simulation for an overfilled threadpool
* Activity is only counted for not-reverted functions
* Fixed the Syslog logger (some messages were in wrong order, some forgotten)
* Fixed GVT algorithm, deadlocks and incorrect GVTs should be solved
* Fixed termination algorithm
Version 2.1.4
+ Added a Cell DEVS styled activity tracer
+ Added a Cell DEVS styled location tracer
+ Added Cell DEVS styled tracer 'gnuplot' and 'libav' animation script
+ Start of Sphinx documentation
+ Added PyRO tests
+ Realtime simulation keeps track of the termination_time
* Realtime backend is now compliant with Python3
* Fixed PyRO simulation for nodes without actual models
* Default message copy method now uses pickle's HIGHEST PROTOCOL
* Fixed the *elapsed* attribute for the confluent transition function
Version 2.1.3
+ Added marshal library for use in the state saver
+ Added HeapSet scheduler
+ Added NoAge scheduler (only use when ALWAYS ta > 0)
+ Added SortedList scheduler
+ VCD and XML traces can also be saved to a user-defined filename
+ Added automatic model-to-node allocation as an option
+ Added some additional checks in the configuration setting
+ Checkpoint recovery for XML and VCD tracing is possible
+ Termination condition became somewhat more fine grained
+ Draw the model to a user-defined file
+ Added model reinitialisation: simply rerun simulate()
+ Added API for changing a model after it has been distributed (for reinit)
* Split up the state savers
* Game Loop realtime backend is now user-configurable for FPS
* Added some configuration options
* Nested simulation was completely rewritten
* Logging now respects the logging settings and messages before this
configuration are queued
* Fixed a simulation bug where some messages get resent due to revertions
* Fixed PyRO simulation
* Fixed several problems with relocation, still somewhat buggy
* Cleaned up tests
* Fixed memory leak in the MPI backend
* Fixed Python3 compliance
* Message scheduler became much cleaner and more maintainable
* Anti messages are sent 'en masse'
* Model distribution is faster by a factor 10 due to different pickling
- Nested simulation only works if both the nesting and the nested
simulation are local
- Configuration options for the nested simulation are removed as they are
no longer necessary
Version 2.1.2
+ Added a looping backend for realtime simulation
+ Looping realtime backend builtin in the simulator with calls
realtime_finished() and realtime_loop_call()
+ Allow even huge models to be transfered and checkpointed, by removing
artificial recursion when pickling fails otherwise (includes small test)
+ Added basic tests for VCD and XML tracing
+ Allow direct simulation of AtomicDEVS models
+ Added tests for the three different realtime backends
+ Added small smoke test for checkpointing
+ Model can be marked as 'used in termination condition'
+ Model has the new simSettings function to do model-specific configs
+ Lots of internal documentation added
+ Check for whether or not the number of used locations is actually
available
+ Edge labels can be hidden when drawing the model for small graphs
* Fixed a massive performance degradation in the MPI redirection
* Don't attempt to load an incomplete checkpoint (and subsequently crash)
* Minor changes to realtime simulation backends
* Relocation directives can be denied in case it is a model used in
termination condition
* Used dictionary comprehension instead of for loop at some places
* Progress bar now always ends with 'completely done' instead of partial
* Minor code cleanup
* Fixed a race condition in the external message scheduler
* Message scheduler was leaking memory by not cleaning up everything
- Termination condition can no longer run on any node, runs on controller
Version 2.1.1
+ Message copy can be ignored for performance (as in nearly all other
simulators)
+ Added realtime test
* Fixed several realtime termination bugs
* Realtime component now uses sys.stdin instead of raw_input
* Fixed PyRO middleware usage
* Fixed some critical bugs in the XML and VCD tracers
* Local simulation no longer runs on a thread for easy profiling/debugging
* Huge performance improvement for when lots of models are transitioning
* Changed the signalling protocol from message based (as in the abstract
simulator) to an optimized implementation
* Fixed some bugs in the scheduler
* Increased performance for the scheduler
* Bugfix for when a revertion was caused by an anti-message
Version 2.1
+ Models can be drawn before simulation using GraphViz
+ Added model migration
+ A node can now host any number of models, even atomics
+ Added model migration, including directives
+ Added an API to set all simulation options, with some sanity checking
+ Added a fetch_all option to the simulator to reconstruct the model
locally
+ Added automatic detection of middleware
+ Added RootDEVS class
+ Added progress visualisation, rather handy in distributed simulation
* Huge alterations to the internal representation of models
* Reduced code size by completely refactoring model and simulation setup
* Simulation can now be killed with ctrl-c without hanging
* Coupled models get completely removed by direct connection
* Direct connection works only once on the root model
* Model is constructed locally and then broadcast to other kernels
* Fixed fossil collection race condition
* Simplified checkpoint restoration and creation
* Cleaned up tests
* Simplified Solver core due to more agressive direct connection
- Removed the plethora of (incompatible) IDs in models
- Removed the mpirunner.py scripts
- Removed checks for wrong local invocations, should no longer happen
- Removed RemoteCDEVS class
- Removed irreversibility (except locally) due to problems with model relocation
- Removed remote code execution for model construction, normal code
execution is still possible
- Removed special Cython parts and build scripts
Version 2.0
+ Further optimisations to the main simulation algorithm
+ Added Parallel DEVS simulation
+ Output function now returns a dictionary of outputs
+ Realtime simulation can use manual and automated input simultaneously
+ Added distributed simulation, both PyRO and MPI4Py
+ Added syslog logger
+ Added checkpointing
+ Allow for termination time instead of termination condition
+ Added direct saving to file of output
+ Allow nested simulation in distributed environment
+ Made Python3 compliant
+ Made PyPy compliant
+ Made Cython compliant
+ Messages got their own class
+ Added NestingException exception for nesting problems
+ Added irreversibility for faster distributed simulation
+ Added actual automated tests using Python unittest instead of ad-hoc manual testing
* Split up several files due to huge amount of additions
* Optimized memory consumption of VCD and XML output
* Modularised simulation tracing
* Updated examples
* Transitions now take an additional argument indicating the input
* Fixed realtime simulation bugs
- Removed Classic DEVS simulation
- Removed Peek and Poke methods
- Removed Root output in verbose tracing
Version 1.2
+ Allow realtime simulation using Python threads and TkInter events
Version 1.1
+ Added custom 'copy()' function for messages
+ Added direct connection
* Optimized message scheduler
* Optimized message passing
- Removed INFINITY object, redirected to a float
Version 1.0.5
+ Added VCD tracing option
* Fixed non-determinism bug in sorting colliding models
Version 1.0.4
+ Added XML tracing option
Version 1.0.3
* Cleanup of terminology
* Use True/False instead of 1/0
Version 1.0.2
+ Added code to display atomic DEVS' initial conditions
Version 1.0.1
* Deal with DeprecationWarning
* Default timeAdvance returns INFINITY
Version 1.0
+ Initial version