Messages in this thread | | | Date | Wed, 22 Oct 2003 12:08:08 -0700 | From | Dave Olien <> | Subject | Re: [BENCHMARK] I/O regression after 2.6.0-test5 |
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I don't know how useful this might but. I've been trying to track down which patches to as-iosched resulted in the performance drop. The results so far are a little confusing. I have been running reaim on an 8-way system, comparing as-iosched performance with deadline, on each kernel version. The numbers are "number of jobs per minute". So, larger is better.
Deadline As-iosched 2.6.0-test5 8542 8589 2.6.0-test5-mm1 8303 8401 2.6.0-test5-mm2 8309 8224 2.6.0-test5-mm3 8222 8417 2.6.0-test6 8302 6934 **** 2.6.0-test6-mm1 8375 8163 2.6.0-test6-mm2 ??? 8309
I'm still getting data on test6-mm*. It's curious that performance dropped for test6, but came back for test6-mm1.
On Wed, Oct 22, 2003 at 11:30:28AM -0700, Dave Olien wrote: > > Sorry, this patch didn't fix our performance problems. Mary just > finished running dbt2 on test8 with your patch: > > NOTPM kernel scheduler > 965 2.6.0-test8-np AS > 1632 2.6.-test6-mm4 deadline > > This is an 8-way system with DAC960 and 12 LUNs, using raw devices. > That's still quite a sizeable drop. > - 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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