Messages in this thread | | | From | "Ming Lei" <> | Subject | Re: Linux 2.4 scheduler is RTOS-alike? | Date | Thu, 22 May 2003 13:01:30 -0700 |
| |
will it be the same behavior If thread A and thread B both have a lot of printf? Suppose A get first run, does B get run at all?
> this question is regarding linux kernel 2.4.7-2.4.20. > linux 2.4 kernel does support real time sheduler. If using FIFO real time > schedule policy, would the case that higher priority thread starve the lower > priority thread happen? Similarly, let's say an example: if I have higher > prioority thread A and lower priority thread B, thread A is running without > any wait or blocking, is there a possiblity that 2.4 scheduler may want to > switch to thread B? Why?
Yes, FIFO threads that spin will block lower priority threads forever.
Sure, guaranteed if the high prio SCHED_FIFO task doesn't block at all. If you have a pure cpu burner, it will starve all lower priority threads.
- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |