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blocktim test does not work in cooperative

Posted by Yen on March 4, 2008
Hi all,

When running blocktim test with all the other tests in co-operative scheduler, the blocktim failed at this condition: if( xBlockedTime > ( xTimeToBlock + bktALLOWABLE_MARGIN ) ). It looks like it is affected by semtest, countsem and flop tests. However, it would pass at pre-emptive scheduler. Does anyone have the blocktim working at co-operative scheduler with all the other tasks running simultaneously please?

RE: blocktim test does not work in cooperative

Posted by Richard on March 4, 2008
The blocktim demo is checking/demoing the timing characteristics of tasks of varying priority with a preemptive scheduler. When the cooperative scheduler is in use the time between a event occurring and that event being processed in a task is dependent on the activities of other tasks (when and how often they yield) and will vary. I would therefore not expect the blocktim tasks to pass their timing tests unless the preemptive scheduler was being used.

Regards.


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