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author | sd386@font.cl.cam.ac.uk <sd386@font.cl.cam.ac.uk> | 2005-04-01 13:01:31 +0000 |
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committer | sd386@font.cl.cam.ac.uk <sd386@font.cl.cam.ac.uk> | 2005-04-01 13:01:31 +0000 |
commit | 60e19526de2a02efa8f66715629b25579f9f3a77 (patch) | |
tree | cea028a8bb224a54592e7fae4e32b269b1112dc2 /docs/misc | |
parent | 0e2e29a5d07411344a4e4af1cdf96df1d439da8e (diff) | |
download | xen-60e19526de2a02efa8f66715629b25579f9f3a77.tar.gz xen-60e19526de2a02efa8f66715629b25579f9f3a77.tar.bz2 xen-60e19526de2a02efa8f66715629b25579f9f3a77.zip |
bitkeeper revision 1.1159.170.109 (424d462b3t7TNRulCLgZcZNC5I8oew)
Added a very brief usage guide on the sedf scheduler.
Diffstat (limited to 'docs/misc')
-rw-r--r-- | docs/misc/sedf_scheduler_mini-HOWTO.txt | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/docs/misc/sedf_scheduler_mini-HOWTO.txt b/docs/misc/sedf_scheduler_mini-HOWTO.txt new file mode 100644 index 0000000000..ad3cc62e1f --- /dev/null +++ b/docs/misc/sedf_scheduler_mini-HOWTO.txt @@ -0,0 +1,44 @@ +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 sedf <dom-id> <period> <slice> <latency-hint> <extra> <weight>" + 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 sedf <dom-id> 20000000 5000000 0 0 0 + + best-effort domains (i.e. non-realtime): + xm sedf <dom-id> 20000000 0 0 1 0 + + normal EDF (20ms/5ms) + share of extra-time: + xm sedf <dom-id> 20000000 5000000 0 1 0 + + 4 domains with weights 2:3:4:2 + xm sedf <d1> 0 0 0 0 2 + xm sedf <d2> 0 0 0 0 3 + xm sedf <d3> 0 0 0 0 4 + xm sedf <d4> 0 0 0 0 2 + + 1 fully-specified (10ms/3ms) domain, 3 other domains share + available rest in 2:7:3 ratio: + xm sedf <d1> 10000000 3000000 0 0 0 + xm sedf <d2> 0 0 0 0 2 + xm sedf <d3> 0 0 0 0 7 + xm sedf <d4> 0 0 0 0 3
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