Re: Problem about CPU stalling in hrtimer_intterrupts()
From: Thomas Gleixner
Date: Sat Oct 24 2015 - 05:59:44 EST
On Thu, 22 Oct 2015, Yang Yingliang wrote:
> But I found out when the cpu is stalling, basenow.tv64(7676664221321) is
> bigger than ktime_get().tv64(7336008904750) in hrtimer_interrupt() and
> the timer->_softexpires is 7336288000000. This makes it can not finish
> the while loop until ktime_get().tv64 arrives basenow.tv64.
> Is it correct that basenow bigger than ktime_get() ?
You only can compare basenow and ktime_get() for the clock monotonic
base. If you are actually observing this on clock monotonic base then
base->offset of clock monotonic is not 0, which should never happen.
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