Re: sysbench+mysql(oltp, readonly) 30% regression with 2.6.26-rc1

From: Peter Zijlstra
Date: Fri May 09 2008 - 02:51:32 EST



> > > -rc1. Do you have the fix below applied?
> >
> > Oooh - good catch, that seems to be a post -rc1 merge.
> >
> > Yes this is required.

> With below patch+previous_fix_weight_calc, the result is improved, but is still
> about 10% worse than the one of pure 2.6.26-rc1.
> Number of threads: 16
> read/write requests: 6104336 (50867.11 per sec.)
>

So puzzling - could you try -git + fix_weight_calc, as I think that is
what Mike tested and proved good on his Quad.



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