Re: Jiffies from userspace

From: Eli Carter (eli.carter@inet.com)
Date: Fri Feb 01 2002 - 15:58:54 EST


Jim wrote:
>
> Sorry if this question seems stupid, but would this be a
> reasonable way to get an estimate of the "current" value of the
> kernel's jiffies:
>
> set -- `cat /proc/self/stat`; echo ${22}
>
> ... my reasoning:
>
> The cat will start a new process, field 22? of its "stat" node
> under proc should have the jiffies value at the time the process
> was started; so the echo command execute "shortly" thereafter.
>
> But am I right about the struct of stat: Is that really in ${22}?
>
> (I'm not actually planning on using this technique, it's just a
> curiosity. The only practical use I can see for it might be for
> doing a sanity check on gettime; checking this for an increasing
> value has a hedge against settime discontinuities).

'cat /proc/uptime' might be more what you want...

Eli
--------------------. Real Users find the one combination of bizarre
Eli Carter \ input values that shuts down the system for days.
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