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Ian Campbell
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This document contains several 0xa0 characters (non-breaking spaces). These do not display correctly in (some) terminals or when the document is rendered by (some) browsers. Re-encode them as spaces. I'm not confident that this change will make it through being encoded as a patch and sent through email. Its effect can be replicated with: perl -i -p -e 's/\xa0/ /g' docs/misc/sedf_scheduler_mini-HOWTO.txt [ I ran the rune rather than trying to apply the patch -iwj ] Signed-off-by: Ian Campbell <ian.campbell@citrix.com> Committed-by: Ian Jackson <ian.jackson@eu.citrix.com>
45 lines
1.4 KiB
Plaintext
45 lines
1.4 KiB
Plaintext
sEDF scheduler
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--------------
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Author:
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Stephan.Diestelhorst@{cl.cam.ac.uk, inf.tu-dresden.de}
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Overview:
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This scheduler provides weighted CPU sharing in an intuitive way and
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uses realtime-algorithms to ensure time guarantees.
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Usage:
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-add "sched=sedf" on Xen's boot command-line
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-create domains as usual
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-use "xm sched-sedf <dom-id> <period> <slice> <latency-hint> <extra> <weight>"
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Where:
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-period/slice are the normal EDF scheduling parameters in nanosecs
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-latency-hint is the scaled period in case the domain is doing heavy I/O
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(unused by the currently compiled version)
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-extra is a flag (0/1), which controls whether the domain can run in
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extra-time
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-weight is mutually exclusive with period/slice and specifies another
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way of setting a domains cpu slice
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Examples:
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normal EDF (20ms/5ms):
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xm sched-sedf <dom-id> 20000000 5000000 0 0 0
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best-effort domains (i.e. non-realtime):
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xm sched-sedf <dom-id> 20000000 0 0 1 0
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normal EDF (20ms/5ms) + share of extra-time:
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xm sched-sedf <dom-id> 20000000 5000000 0 1 0
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4 domains with weights 2:3:4:2
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xm sched-sedf <d1> 0 0 0 0 2
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xm sched-sedf <d2> 0 0 0 0 3
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xm sched-sedf <d3> 0 0 0 0 4
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xm sched-sedf <d4> 0 0 0 0 2
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1 fully-specified (10ms/3ms) domain, 3 other domains share
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available rest in 2:7:3 ratio:
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xm sched-sedf <d1> 10000000 3000000 0 0 0
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xm sched-sedf <d2> 0 0 0 0 2
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xm sched-sedf <d3> 0 0 0 0 7
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xm sched-sedf <d4> 0 0 0 0 3
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