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Problem Report 2110 Details

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Report 2110 Actions

    Problem Report Number 2110
    Submitter's Classification Test Suite problem
    State Resolved
    Resolution Test Suite Deficiency (TSD)
    Problem Resolution ID TSD.X.1075
    Raised 1999-08-18 08:00
    Updated 2003-03-13 08:00
    Published 1999-08-25 08:00
    Product Standard Multi-Purpose Realtime Operating System
    Certification Program The Open Brand certification program
    Test Suite VSTH version 5.1.3
    Test Identification PTHR.os/all/sched_yield 1
    Problem Summary TSD5TH.00067 The test has all but one threads in a process do a sched_yield() and expects the remaining thread to be scheduled first. In our multi-processor implementation, we don't guarantee which thread runs fi...
    Problem Text
    The test has all but one threads in a process do a sched_yield()
    and expects the remaining thread to be scheduled first. In our
    multi-processor implementation, we don't guarantee which thread
    runs first. The thread may infact successfully yield the processor
    but if there is no other thread ready to run, it might get scheduled
    immediately and race with the thread that did not yield.

    The above test fails often on a multi-proc system. If all but one
    processor are offlined (i.e the system is made to run in single-
    processor mode) the test passes.

    This appears to be test implementation issue.
    Test Output
    10|180 /tset/PTHR.os/all/sched_yield/T.sched_yield 13:02:32|TC Start, scenario r
    ef 183-0
    15|180 3.2-lite 1|TCM Start
    400|180 1 1 13:02:33|IC Start
    200|180 1 13:02:33|TP Start
    520|180 1 00003399 1 1|A call to sched_yield() shall force the calling thread to
    520|180 1 00003399 1 2|relinquish the processor and return 0 if successful.
    520|180 1 00003399 1 3|Posix Ref: Component SCHED_YIELD
    520|180 1 00003399 1 4|Assertion 9945-1:1996 13.3.5.2-1(A)
    520|180 1 00003399 16 1|T1_first, expected 0, got 6
    220|180 1 1 13:02:33|FAIL
    410|180 1 1 13:02:33|IC End
    80|180 0 13:02:34|TC End, scenario ref 183-0

    Review Information

    Review Type TSMA Review
    Start Date null
    Completed null
    Status Complete
    Review Recommendation No Resolution Given
    Review Response
    A test suite deficiency is recommended

    Review Type SA Review
    Start Date null
    Completed null
    Status Complete
    Review Resolution Test Suite Deficiency (TSD)
    Review Conclusion
    This is an agreed Test Suite Deficiency.

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