Re: ANNOUNCE : Cheddar 1.2p0

[Jim Rogers <jimmaureenrogers@worldnet.att.net>]

Frank Singhoff wrote:

> The LIMI/EA2215 team is pleased to announce a new release of Cheddar,
>  a free real time scheduling
> simulator. Cheddar is a scheduling framework designed for educational purpose
> and for quick  prototyping of real time scheduling algorithms. Cheddar
> is composed of two independent parts : a graphical editor used to 
> describe a real time application/system, and a library which includes
> classical real time scheduling/feasability algotithms/tests.
> 
> The current release is now 1-2p0.
> 
> 
> Cheddar is distributed under the GNU GPL license.  
> Source code, binairies and documentation can be downloaded from :
> 
> http://beru.univ-brest.fr/~singhoff/cheddar
> 
> Cheddar is written in ADA with GtkADA for the graphical editor part. 
> Cheddar runs on Solaris, Linux and
> win32 boxes and should run on every GNAT/GTKADA supported platforms
> (see ACT web site for details).
> 
> 
> With Cheddar, you can : 
>         - Draw scheduling with classical real time schedulers 
> 		(Rate Monotonic, Deadline Monotonic, 
> 		schedulers, Least Laxity First and Earliest Deadline 
> 		First, POSIX.4 queueing policies).		
> 	- Check scheduling faisability with :
>         	- Response times (with DM and RM).
>         	- Processor utilization (with EDF, LLF, RM and DM).
>         	- Scheduling for a given base period.
> 	- Support for aperiodic and periodic tasks (with jitter
> 		and deadline > period).
> 
> 
> 
> The new features are :
> 	- A small framework is provided to design/test multiprocessor 
> 	  schedulers. In the current
> 	  release, a scheduler with precedencies is built with this
> 	  framework
> 	- SCHED_FIFO/SCHED_RR/SCHED_OTHERS Posix 4
> 		scheduler
> 	- Shared resources support (scheduling and
> 		blocking time analysis).
> 		Supported protocols : PIP, PCP.
> 	- A small user's guide is now provided
> 	- Tools to express and do simulations with task precedencies.
> 	- Tindell end to end response time computation.
> 	- Chetto and Blazewicz task parameter modification algorithms
> 		to take care of task precedencies 
> 	- Tools to compute bounds on buffers shared
> 		by periodic tasks.
> 	- Many fixed bugs from the previous release
> 
> 
> Work in progress  : 
> 	- Write a user'guide of the framework
> 	- Response time for EDF and LLF schedulers.
> 	- SRP support.
> 	- Message scheduling.
> 
> 
> 
> 
> Feel free to contact us for help or bugs report.
> 
> 
> 
> Best Regards,
> The LIMI/EA2215 team
> 


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Jim Rogers