Date: Thu, 28 Jan 1999 12:43:07 -0700 (MST) From: "Kenneth D. Merry" <ken@plutotech.com> To: pantzer@ludd.luth.se (Mattias Pantzare) Cc: freebsd-hackers@FreeBSD.ORG Subject: Re: Device statistics Message-ID: <199901281943.MAA75529@panzer.plutotech.com> In-Reply-To: <199901280843.JAA10784@zed.ludd.luth.se> from Mattias Pantzare at "Jan 28, 99 09:43:01 am"
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Mattias Pantzare wrote... > > Mattias Pantzare wrote... > > > I am trying to teach iostat to print the percent of time the disk is busy > > > (transactions in progress), for that I use the information in struct devstat. > > > > > > The problem is that start_time is recorded using getmicrouptime. If I replace > > > that with getmicrotime I can do my magic. > > > > > > Is there a function that I missed that can get the same time > > > as getmicrouptim but in userspace? > > > > Try the kern.boottime sysctl variable. That's what w/uptime uses to figure > > out how long the machine has been up. > > > > You can subtract the current time from the boot time to get the uptime. > > > > I used getmicrouptime(), since it increases monotonically, unlike the > > regular system time. (e.g., you're running xntpd, and it steps the time > > back some) > > That means that I can't use the current time to subtreact from boot time, as > that won't give the same time... > > If getmicrouptime was recorded in devstat when the sample is taken that would > work to (even better). If you look at last_comp_time, that's the time of the most recent transaction completion, as reported by getmicrouptime(). > > > > > Current temperature 99-01-28 00:19:17 -40.7 degrees Celsius (-41.2F) > > > > Wow, is that temperature accurate? > > Yes. Some places have almost -50 C Very impressive. :) Ken -- Kenneth Merry ken@plutotech.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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