calcru: runtime went backwards, RELENG_6, SMP

Dmitry Morozovsky marck at
Fri Jun 8 12:52:43 UTC 2007

On Wed, 6 Jun 2007, Matthew Dillon wrote:

MD> :IV> > Upd: on GENERIC/amd64 kernel I got the same errors.
MD> :IV> 
MD> :IV> Do you perhaps run with TSC timecounter? (that's the only cause I've notice
MD> :IV> that can generate this message).
MD> :
MD> :Nope:
MD> :
MD> :marck at ct-new:~> sysctl kern.timecounter
MD> :kern.timecounter.tick: 1
MD> :kern.timecounter.choice: TSC(-100) ACPI-fast(1000) i8254(0) dummy(-1000000)
MD> :kern.timecounter.hardware: ACPI-fast
MD> :...
MD>     kgdb your live kernel and 'print cpu_ticks'.  See what the cpu ticker
MD>     is actually pointing at, because it might not be the time counter.
MD>     It could still be TSC.

Hmm, i'm not sure I understand you right: what do you mean by 'kgdb live 
kernel'? I send break over serial console, and in ddb got

db> print cpu_ticks
Symbol not found

D.Marck                                     [DM5020, MCK-RIPE, DM3-RIPN]
*** Dmitry Morozovsky --- D.Marck --- Wild Woozle --- marck at ***

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