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152132f08a
* Keep track of the currently running threads. * Make use of that info to decide if a thread that becomes ready should preempt the running thread. * If we should preempt we send the target CPU a reschedule message. * This preemption strategy makes keeping track of idle CPUs by means of a bitmap superflous and it is therefore removed. * Right now only other CPUs are preempted though, not the current one. * Add missing initialization of the quantum tracking code. * Do not extend the quantum of the idle thread based quantum tracking as we want it to not run longer than necessary. Once the preemption works completely adding a quantum timer for the idle thread will become unnecessary though. * Fix thread stealing code, it did missed the last thread in the run queue. * When stealing, try to steal the highest priority thread that is currently waiting by taking priorities into account when finding the target run queue. * Simplify stealing code a bit as well. * Minor cleanups. git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@32503 a95241bf-73f2-0310-859d-f6bbb57e9c96