Date: Sat, 23 Dec 1995 15:56:49 +0100 (MET) From: Mattias.Gronlund@sa.erisoft.se (Mattias Gronlund) To: freebsd-hackers@FreeBSD.ORG Subject: iostat and msps Message-ID: <9512231456.AA04185@sws021.sa.erisoft.se>
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Hi! I have been trying to use iostat to check how busy a my disks are, but the scsi-disk whant give me a value for msps. After lookung in the source I found that the sd device didn't implement dk_busy flag. After that I did a simple implementation of db_busy I found that iostat used dk_wpms to calculate msps but dk_wpms is a constant, why is that?? So my question is, why try to calculate msps from a constat that what I guess seldom have a value even near the corrspondign value for the drive?? wouldn't it be better just to give a value that says how many percent of the time the drive where busy? An other question that arise when I implemented dk_busy for the sd driver was what happen i I have more disks than DK_NDRIVE drives? shouldn't the dk_xxx variabels be better to have dynamic? /Mattias PS. A just have to thank for a wonderfull OS, thanks all who have contributed to this project! DS.
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