This afternoon I finally figured out more with regarding to a strange
clock-slip problem we have on our asterisk box.
We have two TE410s, in E1 mode:
TE410P version c01a009b
They have their own interrupts:
66: 781648298 783747388 IO-APIC-level t4xxp
233: 253890977 1311504670
I've seen a similar problem before. Span 3 was throwing errors for
(what seemed to be) no reason at all. After some testing it seemed
that the number of errors thrown on Span 3 had a relationship to the
temperature inside the servers. After installing additional cooling
the errors had
