[CentOS] how to debug hardware lockups?
John R Pierce
pierce at hogranch.com
Thu Nov 20 08:38:49 UTC 2008
Rudi Ahlers wrote:
> This is when I realized that the Q9300 CPU could be too big a
> processor for the fan that I have installed.
> The fan that I have, is:
> So, it looks like it's not really made for a Q9300 CPU, although their
> specs say it is
that fan says its for up to 135 watt CPUs, I don't think a q9300 is
anywhere near that, so unless that heatsink fan is grossly under its
speced capability, I dont think thats a problem. Yeah, the Q9300 is
95W max, and thats with all 4 cores running heavy math...
HOWEVER. Intel desktop boards generally have a passive heatsink on the
northbridge and expect the downdraft from a conventional CPU fan to cool
said northbridge. your 1U configuration might not be moving enough air
past that northbridge. I know on my DG33TL in a desktop minitower, the
G33 northbridge runs pretty hot, and I had to arrange for some extra
airflow past it since I used a 'tower cooler' which blew the air
sideways rather than down.
I still think running four instances of mprime (from www.mersenne.org)
each bound to a different cpu affinity (-a0, -a1, -a2, -a3) and running
the 'torture test' overnight will tell you a lot. do this with xen
disabled, just the base system running at init 3. any sort of
computational or memory timing related glitch will show up as a numeric
error and be logged by the program.
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