[Beowulf] Re: RRDtools graphs of temp from IPMI

Dave Love d.love at liverpool.ac.uk
Tue Nov 11 09:41:06 EST 2008


Chris Samuel <csamuel at vpac.org> writes:

> The reason it worries about high load is that we
> used to see processes hang trying to read from the
> IPMI device, but haven't seen that with more recent
> kernels..

How recent?  We've seen similar trouble on Supermicros with a SuSE 10.3
(2.6.22.17) kernel, hence doing it out-of-band, as I just posted.
(Sorry I basically duplicated the in-band one of yours.)  It involves
the kipmi0 kernel thread going CPU-bound and sometimes getting a huge
load average from failed ipmitool instances hanging around.

By the way, the IPMI temperature sensors don't work on our
H8DCE-HTE/AOC-IPMI20-E Supermicros, although lmsensors does work.  Does
anyone know a fix for that?
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