[time] Worried newbie - odd graphs?

[Dreamy]

Hi Adrian, thanks for constructive reply,

> This one *is* odd.

Damn I thought so. :)

> The since wave per se is often seen related to temperature changes.
..
> So something is decidedly wrong with your machine.  A very bad motherboard
> clock perhaps, or the Linux issue Dave Hart has mentioned, perhaps.

I  am  using  Asus P5BV-C with older Xeon 3085, nothing is overclocked
and  temperatures  are very OK. This board is running nonstop for two
years and I've never seen any instability issues.

Linux  -  might be, Debian testing is nightmare, plus with XEN - hell.
Planning  to  reinstall. 'disable kernel' is now set, I am waiting for
graph.

May  it  also be upstream ntp server problem? May some clocks generate
such odd time?

> Also,  network  problems  don't usually cause this.  ntpd (you *are*
> using ntpd?

Network  is 100% fine, at least from my point of view. I tried to ping
a lot and everything seems stable.

Yes:
ii  ntp  1:4.2.6+dfsg-1  Network Time Protocol daemon and utility programs