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    SubjectRe: Priority Inheritance Test (Real-Time Preemption)

    * Esben Nielsen <simlo@phys.au.dk> wrote:

    > Hi,
    > From realfeel I wrote a small, simple test to test how well priority
    > inheritance mechanism works.

    cool - this is a really useful testsuite.

    > I tested it on V0.7.26-0 and my own U9.2-priom. Both implementations
    > fails when the mutex is congested by more than 1 non-real-time task.
    > [...]

    i can confirm your measurements.

    I have fixed all the PI bugs that your suite uncovered (there were quite
    a number of them!), the fixes are included in the V0.7.30-0 patch
    available at the usual place:

    http://redhat.com/~mingo/realtime-preempt/

    with this patch i get the expected histogram with entries only in the
    0-1 msec buckets.

    Ingo
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