On Mon, Apr 03, 2017 at 08:06:23AM +0300, Ran Shalit wrote: > On Mon, Apr 3, 2017 at 5:38 AM, Alison Chaiken <alison@xxxxxxxxxxxxxxxx> wrote: > > Ran Shalit <ranshalit@xxxxxxxxx> wrote: > >> I have found in > >> https://wiki.linuxfoundation.org/realtime/documentation/howto/applications/cyclic > >> that there is EDF scheduler option for creating a periodic RT thread. > >> Yet, I could not understand what's behind the EDF scheduler > > > > > > Have a look at "Using SCHED_DEADLINE" at > > > > http://elinux.org/ELC_Europe_2016_Presentations > > > > Also, look for papers on this topic by Juri Lelli. > > > > HTH, > > Alison > > Hi Alison, > > Thank you very much. > I reviewed the material, which is very interesting, but I am not yet > sure which timer are used internally in SCHED_DEADLINE. > Is it posix or non-posix ? A "posix-timer" is a userspace-construct. A posix-timer will use the hrtimer in the kernel - which ends up in the same subsystem used by the deadline scheduler. -- Henrik Austad
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