On Fri, Dec 26, 2014 at 09:14:22PM +0530, Chanchal Paul wrote:

Hi all,

Hi Paul,

I am trying to implement my custom scheduling policy in rt patched linux kernel. I am working with version 3.14.25-rt22. I have successfully installed the kernel after patching with rt patch of same version.

Now the installed kernel also has SCHED_DEADLINE i.e. the EDF scheduling policy.

The problem in my hand is to introduce a parameter in the SCHED_DEADLINE policy which will further dynamically change the priority according to the supplied value while the task is submitted.

You do know that SCHED_DEADLINE does not use priorities but _deadlines_, right? care to elaborate a bit?

I have already simulated and tested my requirement. I am having problem with understanding the hierarchy of scheduler code.

You mean the order of the scheduling policies? If you look at the sched_class in the different classes, you'll find the following hierarchy: stop_sched_class dl_sched_class rt_sched_class fair_sched_class idle_sched_class So, first the scheduler sees if there's any deadline tasks, then -rt and so on. I (we) need a bit more info about what exactly it is you're struggling with

Thanks in advance -- To unsubscribe from this list: send the line "unsubscribe linux-rt-users" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html

-- Henrik Austad