Messages in this thread | | | Date | Tue, 02 Sep 2003 18:04:33 +1000 | From | Nick Piggin <> | Subject | Re: [PATCH] Nick's scheduler policy v10 |
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Martin J. Bligh wrote:
>>>>Kernbench: (make -j vmlinux, maximal tasks) >>>> Elapsed System User CPU >>>> 2.6.0-test4 45.87 116.92 571.10 1499.00 >>>> 2.6.0-test4-nick10 46.91 114.03 584.16 1489.25 >>>> >>>> >>>Actually, now looks like you have significantly more idle time, so perhaps >>>the cross-cpu (or cross-node) balancing isn't agressive enough: >>> >>> >>Yeah, there is a patch for this in mm that is not in mine. It should >>help both mine and mainline though... >> > >Not convinced of that - mm performs worse than mainline for me. >
Well, one of Con's patches caused a lot of idle time on volanomark. The reason for the change was unclear. I guess either a fairness or wakeup latency change (yes, it was a very scientific process, ahem).
Anyway, in the process of looking at the load balancing, we found and fixed a problem (although it might now possibly over balance). This did cure most of the idle problems.
So it could just be small changes causing things to go out of whack. I will try to get better data after (if ever) the thing is working nicely on the desktop.
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