Messages in this thread | | | Date | Tue, 10 Jan 2006 21:25:51 -0800 | From | Andrew Morton <> | Subject | Re: [PATCH 0/5] multiple block allocation to current ext3 |
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Mingming Cao <cmm@us.ibm.com> wrote: > > Tests done so far includes fsx,tiobench and dbench. The following > numbers collected from Direct IO tests (1G file creation/read) shows > the system time have been greatly reduced (more than 50% on my 8 cpu > system) with the patches. > > 1G file DIO write: > 2.6.15 2.6.15+patches > real 0m31.275s 0m31.161s > user 0m0.000s 0m0.000s > sys 0m3.384s 0m0.564s > > > 1G file DIO read: > 2.6.15 2.6.15+patches > real 0m30.733s 0m30.624s > user 0m0.000s 0m0.004s > sys 0m0.748s 0m0.380s > > Some previous test we did on buffered IO with using multiple blocks > allocation and delayed allocation shows noticeable improvement on > throughput and system time.
I'd be interested in seeing benchmark results for the common allocate-one-block case - just normal old buffered IO without any additional multiblock patches. Would they show any regression? - 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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