Re: Weird clock behaviour with current (amd64) kernel

[mlelstv%serpens.de@localhost (Michael van Elst)]

kre%munnari.OZ.AU@localhost (Robert Elz) writes:

>The issue only occurs when I boot a kernel with options PCI_CONFIG_DUMP
>enabled, which is (one way or the other) almost certainly responsible for
>the issue - though the problem you mention may be involved in the kernel's
>failure to detect that the TSC measurement is being messed up by that option.

The measurement runs with enabled interrupts. If you have lots of interrupts
or interrupts that take some time, the measurement is biased.

Console output can do this.