Messages in this thread | | | Date | Thu, 23 Jun 2016 10:35:45 +0200 (CEST) | From | Thomas Gleixner <> | Subject | Re: [RESEND PATCH v2 2/2] power/idle: enhance the precision of sleep_length |
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On Thu, 23 Jun 2016, Zhaoyang Huang wrote: > On 23 June 2016 at 16:18, Thomas Gleixner <tglx@linutronix.de> wrote: > > On Thu, 23 Jun 2016, Zhaoyang Huang wrote: > >> On 23 June 2016 at 15:01, Thomas Gleixner <tglx@linutronix.de> wrote: > >> Thomas, I agree with you, I have discussed the modification with the > >> call back owner. However, I wonder if we can make the idle's framework > >> to be more precised without the assumption of short CPU_PM_ENTER > >> callbacks. Thank you! > > > > What's the point? To help people who put insanities into the idle code path? > > > > Thanks, > > > > tglx > > > Hi, Thomas. If the entry,exit,min time of one idle state sums up to > 500us in some platform, the 100us callback which should be common as > caused by cache miss would also generate 20% imprecision. Don't you
A cache miss is causing a 100us callback? What are you talking about?
Thanks,
tglx
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