Messages in this thread | | | Date | Sat, 30 Oct 1999 12:55:14 +0200 | From | Pavel Machek <> | Subject | Re: Wrong bogomips after plugging in AC power |
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Hi!
> > > If I plug it into AC power, it will speed up to 300MHz, but bogomips > > > still have "slow" value. Therefore all udelays are wrong by factor of > > > two -- udelay(50) will only wait approx. 25usec. That seems pretty > > > dangerous to me. Maybe we need some other source of short loops? > > > > I suspect I'll see a similar problem on the PowerPC. The PPC has a way of > > throttling the rate instructions are delivered from the icache to the execution > > You may want to call the bogomips calibration on the x86 when you get power > notifications. What you do on the PPC I dont know. I assume such throttling
But: that would make correctness of kernel dependend on CONFIG_APM. That does not seem right. Also, bogomips recalibration is quite slow. Pavel -- I'm really pavel@ucw.cz. Look at http://195.113.31.123/~pavel. Pavel Hi! I'm a .signature virus! Copy me into your ~/.signature, please!
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