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On Tue, 2006-03-14 at 01:50 -0500, Lee Revell wrote: > On Tue, 2006-03-14 at 07:40 +0100, Mike Galbraith wrote: > >> > > > > echo 64 > /sys/block/hd*/queue/max_sectors_kb > > > > > > There is basically a straight linear relation between whatever you set > > > this to and the maximum scheduling latency you see. It was developed to > > > solve the exact problem you are describing. > > > > <head-scratching> > > > > Is it possible that you mean pci latency? I'm unable to measure any > > scheduling latency > 5ms while pushing IO for all my little Barracuda > > disk is worth. > > It's only a big problem if LBA48 is in use which allows 32MB of IO to be > in flight at once, this depends on the size of the drive. This is a 120G drive. > > What does that value default to? 512. > > I _can_ generate mp3 player audio dropout though, > > despite mp3 files living on a separate drive/controller. > > > > Does this go away if you run the mp3 player at nice -20? Nope. -Mike - 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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