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    SubjectRe: [PATCH]sched: Isochronous class v2 for unprivileged soft rt scheduling
    Jack O'Quin wrote:
    > Looked at this way, there really is no question. The new scheduler
    > prototypes are falling short significantly. Could this be due to
    > their lack of priority distinctions between realtime threads? Maybe.
    > I can't say for sure. I'll be interested to see what happens when Con
    > is ready for me to try his new priority-based SCHED_ISO prototype.

    There are two things that the SCHED_ISO you tried is not that SCHED_FIFO
    is - As you mentioned there is no priority support, and it is RR, not
    FIFO. I am not sure whether it is one and or the other responsible. Both
    can be added to SCHED_ISO. I haven't looked at jackd code but it should
    be trivial to change SCHED_FIFO to SCHED_RR to see if RR with priority
    support is enough or not. Second the patch I sent you is fine for
    testing; I was hoping you would try it. What you can't do with it is
    spawn lots of userspace apps safely SCHED_ISO with it - it will crash,
    but it not take down your hard disk. I've had significantly better
    results with that patch so far. Then we cn take it from there.

    Cheers,
    Con
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