Messages in this thread | | | Subject | Re: Fwd: dm perf scales poorly with 2.6.x kernel | From | Andi Kleen <> | Date | Thu, 17 Feb 2005 07:25:48 +0100 |
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Mike Snitzer <snitzer@gmail.com> writes: > > Ultimately there appears to be a disproportionate increase in the DM > performance hit as the IO throughput capability of the underlying > block device increases (I'm obviously using a limited sampling so...). > But given the current results it is clear there will be a performance > hit associated with using DM; but having that hit be fixed as the > throughput scales would be ideal.
You could do a oprofile run to see where to CPU time is going to and post the results.
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