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List:       linux-rt
Subject:    [rtl] pthread_wakeup_np semantics
From:       Kenneth Jacker <khj () cs ! appstate ! edu>
Date:       2001-03-28 16:35:07
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Let Tlow and Thigh be two threads with priorities 3 and 7
respectively. Assume Tlow issues a pthread_wakeup_np(Thigh).

Will Thigh begin executing immediately?

The non-SMP code for pthread_wakeup_np() in rtl_sched.c is basically:

		pthread_kill(thread,RTL_SIGNAL_WAKEUP);
		rtl_reschedule_thread(thread);

But, rtl_reschedule_thread() just simplifies (for non-SMP) to:

                rtl_schedule()


It would seem that this would result in Thigh getting the CPU ...

Thanks for any clarifications!

  -Kenneth
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