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* Nick Piggin <nickpiggin@yahoo.com.au> wrote: > >This works much better, but wildly varying (my tests go from 2.8xCPU to > >~3.8x CPU for 4 CPUs. 2,3 CPU cases are ok). A bit more consistent > >results would be better though. > > Oh good, thanks Ingo. Andi you probably want to lower your minimum > balance time too then, and maybe try with an even lower maximum. Maybe > reduce cache_hot_time a bit too. i dont think we want to balance with that high of a frequency on NUMA Opteron. These tunes were for testing only. i'm dusting off the balance-on-clone patch right now, that should be the correct solution. It is based on a find_idlest_cpu() function which searches for the least loaded CPU and checks whether we can do passive load-balancing to it. Ie. it's yet another balancing point in the scheduler, _not_ some balancing logic change. Ingo - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ | ||||||||||||
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