Rev 1085 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 1085 | pj | 1 | EDFACT Scheduling Module |
| 2 | ------------------------ |
||
| 3 | by Paolo Gai 2001 |
||
| 4 | |||
| 5 | |||
| 6 | Pisa, 6, Jun 2001 |
||
| 7 | |||
| 8 | This Module implements a EDF scheduler. |
||
| 9 | |||
| 10 | It is very similar to the EDF Module distributed with the kernel sources, |
||
| 11 | except that: |
||
| 12 | - It does not support hard sporadic tasks |
||
| 13 | - It does not raise a deadline exception |
||
| 14 | - It does not raise a wcet violation exception |
||
| 15 | - Instead of raising an exception, the module simply COUNTS deadline misses |
||
| 16 | and wcet exaustions.. |
||
| 17 | |||
| 18 | Since a large part of the applications use only periodic tasks, this Module |
||
| 19 | can be a great improvement because the application will not hang up at |
||
| 20 | the first exception!!! (and this happens frequently when switching to a |
||
| 21 | slower PC :-( ) |
||
| 22 | |||
| 23 | I also wrote a simple test to show how the module works... |
||
| 24 | |||
| 25 | To use the Module in your applications, simply copy the edfact.c and edfact.h |
||
| 26 | into your application directory, and register edfact instead of the |
||
| 27 | tradictional edf... |
||
| 28 | |||
| 29 | For bugs, questions and comments please write to pj@sssup.it |
||
| 30 | |||
| 31 | Paolo |