sEDF scheduler -------------- Author: Stephan.Diestelhorst@{cl.cam.ac.uk, inf.tu-dresden.de} Overview: This scheduler provides weighted CPU sharing in an intuitive way and uses realtime-algorithms to ensure time guarantees. Usage: -add "sched=sedf" on Xen's boot command-line -create domains as usual -use "xm sched-sedf " Where: -period/slice are the normal EDF scheduling parameters in nanosecs -latency-hint is the scaled period in case the domain is doing heavy I/O (unused by the currently compiled version) -extra is a flag (0/1), which controls whether the domain can run in extra-time -weight is mutually exclusive with period/slice and specifies another way of setting a domains cpu slice Examples: normal EDF (20ms/5ms): xm sched-sedf 20000000 5000000 0 0 0 best-effort domains (i.e. non-realtime): xm sched-sedf 20000000 0 0 1 0 normal EDF (20ms/5ms) + share of extra-time: xm sched-sedf 20000000 5000000 0 1 0 4 domains with weights 2:3:4:2 xm sched-sedf 0 0 0 0 2 xm sched-sedf 0 0 0 0 3 xm sched-sedf 0 0 0 0 4 xm sched-sedf 0 0 0 0 2 1 fully-specified (10ms/3ms) domain, 3 other domains share available rest in 2:7:3 ratio: xm sched-sedf 10000000 3000000 0 0 0 xm sched-sedf 0 0 0 0 2 xm sched-sedf 0 0 0 0 7 xm sched-sedf 0 0 0 0 3