Hi,

Peter Zijlstra wrote:
> Right, and I think the solution to this problem is twofold, 1)
> application writers should start writing (soft) realtime applications if
> they want (soft) realtime behaviour -- there's just no way around that.

Just to avoid need for reviewing and reworking ~800 klocs of user space
code in just gstreamer, here's a second take on patches. This time
splitting things into smaller pieces. Attached patch exposes 40
priorities ~ nice values as something accessible through
sched_()/pthreads API in order to control priorities of individual
threads. Current Linux implementation of SCHED_OTHER is broken in a way,
that it exposes only one single priority level - 0. Thus no possibility
to properly control priorities of threads through pthread API. This is
patch is against 2.6.29.2 and not tested, but builds. I can also send
rest of the changes as separate small feature patches as needed.
However, before doing any more work I would like to hear opinions on
this and especially what is wrong with the code or idea...

> And 2), the kernel can help by providing a deadline based scheduler,
> which should make the above easier and less likely to mess up the rest
> of the system. ie. a deadline scheduled application will not exceed its
> allotted budget, unlike a FIFO scheduled app.

Any news on this one?


	- Jussi