From mboxrd@z Thu Jan 1 00:00:00 1970 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on polar.synack.me X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham autolearn_force=no version=3.4.4 X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: 103376,3e4556421d347434 X-Google-Attributes: gid103376,public X-Google-ArrivalTime: 2002-10-18 12:15:17 PST Path: archiver1.google.com!news1.google.com!newsfeed.stanford.edu!canoe.uoregon.edu!arclight.uoregon.edu!wn13feed!worldnet.att.net!bgtnsc04-news.ops.worldnet.att.net.POSTED!not-for-mail Message-ID: <3DB05D7C.3020309@worldnet.att.net> From: Jim Rogers User-Agent: Mozilla/5.0 (Windows; U; Win98; en-US; rv:0.9.4) Gecko/20011128 Netscape6/6.2.1 X-Accept-Language: en-us MIME-Version: 1.0 Newsgroups: comp.lang.ada Subject: Re: ANNOUNCE : Cheddar 1.2p0 References: Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Date: Fri, 18 Oct 2002 19:15:17 GMT NNTP-Posting-Host: 12.86.39.88 X-Complaints-To: abuse@worldnet.att.net X-Trace: bgtnsc04-news.ops.worldnet.att.net 1034968517 12.86.39.88 (Fri, 18 Oct 2002 19:15:17 GMT) NNTP-Posting-Date: Fri, 18 Oct 2002 19:15:17 GMT Organization: AT&T Worldnet Xref: archiver1.google.com comp.lang.ada:29918 Date: 2002-10-18T19:15:17+00:00 List-Id: 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 > You might want to also post this message to comp.programming.threads. Jim Rogers