24 lines
1.0 KiB
Plaintext
24 lines
1.0 KiB
Plaintext
NAME = "Priority inversion tests"
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AUTHOR = "Michal Piotrowski <michal.k.k.piotrowski@gmail.com>"
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TIME = "SHORT"
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TEST_CATEGORY = "FUNCTIONAL"
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TEST_CLASS = "KERNEL"
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TEST_TYPE = "CLIENT"
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DOC = """
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The basic premise here is to set up a deadlock scenario and confirm that PI
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mutexes resolve the situation. Three worker threads will be created from the
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main thread: low, medium and high priority threads that use SCHED_FIFO as
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their scheduling policy. The low priority thread claims a mutex and then
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starts "working". The medium priority thread starts and preempts the low
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priority thread. Then the high priority thread runs and attempts to claim
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the mutex owned by the low priority thread. Without priority inheritance,
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this will deadlock the program. With priority inheritance, the low priority
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thread receives a priority boost, finishes it's "work" and releases the mutex,
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which allows the high priority thread to run and finish and then the medium
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priority thread finishes.
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That's the theory, anyway...
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"""
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job.run_test('pi_tests')
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