Messages in this thread | | | Date | Tue, 06 Aug 2002 20:31:08 +1000 | From | Lincoln Dale <> | Subject | Re: Linux v2.4.19-rc5 |
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At 07:42 AM 6/08/2002 +0200, Jens Axboe wrote: > > Call me an optimist, but after all the reliability problems we had win the > > 2.5 series, I sort of hoped it would be better in performance, not > > increasingly worse. Am I misreading this? Can we fall back to the faster > > 2.4 code :-( > >try a work load that excercises the block i/o layer alone (O_DIRECT, >raw, whatnot) and then compare 2.4 and 2.5. ibm had some slides on this >from ols, unfortunately I don't know if they have then online.
the BIO in 2.5 kicks butt over the 2.4 BIO - both in terms of increased throughput and decreased cpu utilization. see some testing i previously did: http://marc.theaimsgroup.com/?l=linux-kernel&m=102635456620627&w=2
cheers,
lincoln.
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