On Tue, Oct 25, 2016 at 12:32:53AM +0200, Tommaso Cucinotta wrote: > Hi all, > > this is a tiny patch providing readings of the current (leftover) > runtime and absolute deadline in /proc/*/sched. Mostly useful for > debugging, I heard others playing with SCHED_DEADLINE had some need > for similar patches as well. > > In addition to debugging, reading the leftover runtime is generally > useful for adaptive/incremental RT logics that need to check whether > there's enough runtime left for refining the computed result, or just > use what we've computed so far and block till the next instance. > Also, knowing what the absolute scheduling deadline is (along with > what clock it refers to) might be useful for synchronization purposes. > (albeit, for real production code, I wouldn't like to parse /proc anyway, > rather I'd prefer to retrieve those params via eg sched_getscheduler()?)
So for programmatic use, this interface is not recommended. For debugging this is fine. Not sure what form the programmatic interface should take, we have precedence in sys_sched_rr_get_interval() for a syscall (we could even abuse this one). Anybody any ideas?
