Messages in this thread | | | Date | Mon, 21 Sep 2009 23:25:53 +1200 | From | Johannes Buchner <> | Subject | Influence of optimization level, preemption and scheduler on boot time |
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Hi all.
I measured the kernel (and system) boot times while varying the parameters: - Optimization level: -Os, -O2 and also -O3 - Preemptive model - Scheduler: CFQ, Anticipatory, Deadline, Noop
My conclusion was that the optimization level and the preemptive model had no significant influence on speed. CFQ let my system boot several seconds faster than the other schedulers.
Graphs can be found at: http://johannes.jakeapp.com/blog/?p=913
This conclusion may not be true for all situations, but I found it interesting that the optimization level is so irrelevant.
Cheers, Johannes
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