I am trying to write some scripts that would:
1. Sense when the CPU temperature rises above a preset threshold level, and if it
does, launch a program to remedy the condition.
2. The launched program would kill the first process named "perl -w".
3. It would then sleep for some period of time, say 30 seconds, to allow time for
the prelink process to start, which seems to always come after the perl processes,
and which itself threatens an overheat.
4. Kill the prelink process.
Some of the scripts I have written so far:
psk:
kill `ps -ef | grep "$1" | egrep -v grep | awk '{print $2}'`
psu:
ps -ef --cols=500 | grep "$1" | egrep -v grep 2>&1 | tee `date +%y%m%d%H%M`_ps.log
soh (pseudocode):
if [overheat trigger, returns true when CPU temp > 49 C]
then
psk "perl -w"
sleep 30
psk prelink
end
My problem is to figure out how to write that overheat trigger, presumably based
on the sensors command in some way. Is there something already written that would
do that? I have been searching for one and haven't found one yet.
It also appears there are two prelink processes, and it is the second one that
needs to be halted. Only the first perl process needs to be killed, and it is
distinguished by the "-w" flag.
Attached are some diagnostic log files. It is clear that the prelink process is
luanched by anacron, but it is not clear what is launching the perl processes. I
have manually checked the CPU fan and it shows no sign of slowing or stopping when
the overheating condition arises.
-- Jon
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