Re: [RFC][PATCH] linux-2.5.70_btime-fix_A0

john stultz (johnstul@us.ibm.com)
Wed, 04 Jun 2003 11:20:12 -0700


jw schultz wrote:
> On Tue, Jun 03, 2003 at 04:00:59PM -0700, john stultz wrote:
>> Since jiffies didn't necessarily start incrementing at a second
>> boundary, jiffies/HZ doesn't increment at the same moment as
>> xtime.tv_sec. This causes one second wobbles in the calculation of btime
>> (xtime.tv_sec - jiffies/HZ).
>
> Might it not be cheaper to start jiffies at the 1 second
> boundary or with a value that simulates that?

Ehhh... Mucking with the meaning of jiffies (# of timer ticks) just to fix a
math error in /proc/stat seems like a bit much.

But I'll look to see if I can improve the math some.

thanks
-john

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