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SubjectRe: sched: Consequences of integrating the Per Entity Load Tracking Metric into the Load Balancer
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On Sat, 2013-01-05 at 09:13 +0100, Mike Galbraith wrote:

> I still have a 2.6-rt problem I need to find time to squabble with, but
> maybe I'll soonish see if what you did plus what I did combined works
> out on that 4x10 core box where current is _so_ unbelievably horrible.
> Heck, it can't get any worse, and the restricted wake balance alone
> kinda sorta worked.

Actually, I flunked copy/paste 101. Below (preeti) shows the real deal.

tbench, 3 runs, 30 secs/run
revert = 37407ea7 reverted
clients 1 5 10 20 40 80
3.6.0.virgin 27.83 139.50 1488.76 4172.93 6983.71 8301.73
29.23 139.98 1500.22 4162.92 6907.16 8231.13
30.00 141.43 1500.09 3975.50 6847.24 7983.98

3.6.0+revert 281.08 1404.76 2802.44 5019.49 7080.97 8592.80
282.38 1375.70 2747.23 4823.95 7052.15 8508.45
270.69 1375.53 2736.29 5243.05 7058.75 8806.72

3.6.0+preeti 26.43 126.62 1027.23 3350.06 7004.22 7561.83
26.67 128.66 922.57 3341.73 7045.05 7662.18
25.54 129.20 1015.02 3337.60 6591.32 7634.33

3.6.0+best_combined 280.48 1382.07 2730.27 4786.20 6477.28 7980.07
276.88 1392.50 2708.23 4741.25 6590.99 7992.11
278.92 1368.55 2735.49 4614.99 6573.38 7921.75

3.0.51-0.7.9-default 286.44 1415.37 2794.41 5284.39 7282.57 13670.80

Something is either wrong with 3.6 itself, or the config I'm using, as
max throughput is nowhere near where it should be (see default). On the
bright side, integrating the two does show some promise.

-Mike



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