Messages in this thread | | | Date | Mon, 13 Jun 2005 20:19:50 +1000 | From | Nick Piggin <> | Subject | Re: [RFC] blkstat |
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Con Kolivas wrote: > On Mon, 13 Jun 2005 20:02, Nick Piggin wrote: >
>>The problem with that is that it does not give you a % idle >>figure on the block device, so you basically can't see if >>the device is becoming a bottleneck. > > > I've often wondered how iostat gives a %busy figure and whether this > translated accurately without further info from the kernel. > >
Oh, it does havea "%util" in its extended stats. Sorry I missed that so you might be right.
Hmm, so I guess it uses io_ticks and that does appear to give the valid measure. I'll have a think about that - perhaps there is still a place for the split read/write statistics I'm using...
Thanks, Nick
-- SUSE Labs, Novell Inc.
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