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Problem Report 1359 Details

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Report 1359 Actions

    Problem Report Number 1359
    Submitter's Classification Test Suite problem
    State Resolved
    Resolution Test Suite Deficiency (TSD)
    Problem Resolution ID TSD.X.0641
    Raised 1970-01-01 08:00
    Updated 2003-03-13 08:00
    Published 1997-01-10 08:00
    Product Standard Internationalised System Calls and Libraries Extended (UNIX 95)
    Certification Program The Open Brand certification program
    Test Suite VSU version 4.1.1
    Test Identification base/getitimer 2-3
    Problem Summary TSD4U.00176 This test may fail on implementations that optimize a needed loop out of existence.
    Problem Text
    This test may fail on implementations that optimize a needed loop out of
    existence.

    getitimer[2,3] tests fail because code in fgetitimer2.c (and 3.c
    also) is being optimized out by the compiler, thereby affecting
    the outcome of the test. In particular, when check_getitimer() is
    called with the 'which' argument set to ITIMER_VIRTUAL, the test
    intends to consume TIMER_CONSUMED (i.e., 18) seconds of user time
    within the 10 minute limit allotted to the test. Consumption of
    user time is accomplished by executing the following loop until
    the target quantity of user time is accrued:

    ================
    244 for (i = 0; i < 100000; i++)
    245 j = (i * i) - i + 3 * i;
    ================

    However, since the variables 'i' and 'j' are unused elsewhere in the
    program, this loop is optimized out (and rightfully so) by the compiler if
    the test is built using any optimization level including the default -O1.

    Test Output
    TEST PURPOSE #2
    A call to int getitimer(int which, struct
    itimerval *value) when which is ITIMER_VIRTUAL shall
    store the current value of the ITIMER_VIRTUAL timer
    into the structure pointed to by value and return 0.
    PREP: Open a temporary scratch file
    PREP: Set the ITIMER_VIRTUAL timer to a known value.
    PREP: Loop in the program for arbitrary time.
    Perform dummy I/O on temporary scratch file.
    ERROR: Test took longer than 600 seconds: presuming
    function is hung and terminating test
    2 FAIL

    TEST PURPOSE #3
    A successful call to int getitimer(int which, struct
    itimerval *value) when which is ITIMER_PROF shall
    store the current value of the ITIMER_PROF timer into
    the structure pointed to by value and return 0.
    PREP: Open a temporary scratch file
    PREP: Set the ITIMER_PROF timer to a known value.
    PREP: Loop in the program for arbitrary time.
    Perform dummy I/O on temporary scratch file.
    ERROR: Test took longer than 600 seconds: presuming
    function is hung and terminating test
    3 FAIL

    Review Information

    Review Type TSMA Review
    Start Date null
    Completed null
    Status Complete
    Review Recommendation No Resolution Given
    Review Response
    We agree this is a test suite deficiency in the test
    suite version(s) listed.

    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.

    Problem Reporting System Options:

     

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