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Re: kern/41733: Xeon 3520: CPU MHz wrong -> timecounter wrong
The following reply was made to PR kern/41733; it has been noted by GNATS.
From: Thomas Klausner <wiz%NetBSD.org@localhost>
To: matthew green <mrg%eterna.com.au@localhost>
Subject: Re: kern/41733: Xeon 3520: CPU MHz wrong -> timecounter wrong
Date: Sat, 18 Jul 2009 09:18:59 +0200
On Sat, Jul 18, 2009 at 12:27:50PM +1000, matthew green wrote:
> FWIW, my Q9450 sometimes reports the wrong speed too, though it
> does not seem to affect time.
> cpu0 at mainbus0 apid 0: Intel 686-class, 42028MHz, id 0x10677
> cpu0: "Intel(R) Core(TM)2 Quad CPU Q9450 @ 2.66GHz"
> i have kern.timecounter.hardware = hpet0.
Mine was set to "TSC" -- when I switch to hpet0, the time lost in 5
minutes decreases from 50s to 0.004s. Thanks for the hint!
So is it a bug with TSC or is it just caused by the wrong MHz
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