Messages in this thread | | | Date | Fri, 06 Dec 2002 22:14:50 -0800 | From | Andrew Morton <> | Subject | Re: [BENCHMARK] max bomb segment tuning with read latency 2 patch in contest |
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Con Kolivas wrote: > > ... > >If the SMP machine is using scsi then that tends to make the elevator > >changes less effective. Because the disk sort-of has its own internal > >elevator which in my testing on a Fujitsu disk has the same ill-advised > >design as the kernel's elevator: it treats reads and writes in a similar > >manner. > > These are ide disks, in the same format as those used in the UP machine, so it > still should be showing the same effect? I think higher numbers in UP would > increase the resolution more for these results - apart from that is there any > disadvantage to doing it in SMP? If you think it's worth running them in UP > mode I'll do that.
Oh, OK. I was guessing, and guessed wrong. No, I don't expect you'd see much difference switching to UP for those tests which are sensitive to the IO scheduler policy. - 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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