Messages in this thread | | | Subject | Re: [patch] Real-Time Preemption, -RT-2.6.10-rc2-mm3-V0.7.32-6 | From | Steven Rostedt <> | Date | Fri, 10 Dec 2004 18:42:27 -0500 |
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On Thu, 2004-12-09 at 12:10 -0600, Mark_H_Johnson@raytheon.com wrote: > >but you never want your real application be delayed by things like IDE > >processing or networking workloads, correct? > For the most part, that I/O workload IS because I have the RT application > running. That was one of my points. I cannot reliably starve any of > those activities. The disk reads in my real application simulate a disk > read from a real world device. That data is needed for RT processing > in the simulated system. Some of the network traffic is also RT since > we generate a data stream that is interpreted in real time by other > systems.
[RFC] Has there been previously any thought of adding priority inheriting wait queues. With the IRQs that run as threads, have hooks in the code that allows a driver or socket layer to attach a thread to a wait queue, and when a RT priority task waits on the queue, a function is call to increase (if needed) the priority of the attached thread. I know that this would take some work, and would make the normal kernel and RT diverge more, but it would really help to solve the problem of a high priority process waiting for an interrupt that can be starved by other high priority processes.
Just a thought.
-- Steve
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