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| Rev | Author | Line No. | Line |
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| 1655 | giacomo | 1 | AUTO - Another Unuseful Track simulatOr |
| 2 | --------------------------------------- |
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| 3 | |||
| 4 | by Marco Dallera and Marco Fiocca, 2001 |
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| 5 | |||
| 6 | --------------------------------------- |
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| 7 | |||
| 8 | This project was done as a Lab assignment during the course of |
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| 9 | "Informatica Industriale" at the University of Pavia, Italy. |
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| 10 | |||
| 11 | It simulates a race between cars under a set of 4 tracks. |
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| 12 | |||
| 13 | The authors provided also some pages that describes the application |
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| 14 | (auto.ps, in italian, on the website). |
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| 15 | |||
| 16 | To run the application, just compile it and call "x auto th" where tn is |
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| 17 | the track number (0 to 4). |
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| 18 | |||
| 19 | Since the control algorithm is quite complex, you need a quite powerful |
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| 20 | machine. If you get an exception 8 (WCET violation), you need a faster PC. |
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| 21 | You can anyway run the application making "auto2", that uses RR instead of |
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| 22 | EDF or CBS, or "auto3", that uses the EDFACT Module (you need yo copy |
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| 23 | the edfact.c and edfact.h files in the application directory to do that). |
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| 24 | |||
| 25 | To be run, the application needs to be compiled with the |
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| 26 | #define MAX_CAB set to a number greater than 20 (see include/modules/cabs.h). |
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| 27 | |||
| 28 | The control algorithm of the cars is not yet perfect, and if you look to |
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| 29 | the race for a long time, sometimes some cars go in the wrong direction. |
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| 30 | If you find a better algorithm, send me a patch :-) |
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| 31 | |||
| 32 | The code you can find in this directory is the original code of the |
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| 33 | students except for the MAX_CAB test into main(), and for the idle time |
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| 34 | monitor (that I took from the jumpball example) that can be useful to know |
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| 35 | when the system is overloaded. For example, on my PC there is idle time until |
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| 36 | the system has 9 cars. The tenth make the PC overloaded until one of them |
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| 37 | crashes :-). |
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| 38 | |||
| 39 | Finally note that the WCET and PERIODS specified by the authors are not so |
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| 40 | correct, and with this setting you can run 8 cars maximum before crashing the |
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| 41 | system. |
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| 42 | |||
| 43 | Have a nice race... |
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| 44 | |||
| 45 | Paolo |
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| 46 | pj@sssup.it |
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| 47 | |||
| 48 | PS: Sometimes on my portable the demo crashes. I wonder why!... If someone |
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| 49 | finds why, please tell me, I will patch it... |
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| 51 |