[CentOS] Kernel update = slower ?

[Sam Drinkard <sam@xxxxxxxxxx>]

This is really strange.  Day before, I updated the machine here (x86_64) 
and all went normal.  I rebooted, and everything came back just as I 
expected.  Next morning, I noticed one of my jobs during the night had 
finished, but finished late by about 8 or 9 minutes.  I really didn't 
think much of it, but after looking at jobs running today, I'm seeing 
the same thing.  Processes that used to take 3.75 hours to complete are 
now taking 4 hours.  ( I have cron jobs that were running to process the 
data after the main run, and they busted)  Nothing has changed in the 
way the model runs, and there have been no changes to input data or any 
other parameter that would cause a longer runtime.  So, the question is, 
did something change in the kernel that would make the machine run 
slower?  I do have threading turned on in the bios, and all 4 cpu's are 
shown via dmesg.  In fact, I looked at the dmesg output after a reboot 
and due to another message about losing clock tics, I just checked that 
I had not encountered the same.    Short of rebooting back into the 
previous kernel, is there any way to tell if something is slowing the 
box down?

--
Sam W.Drinkard -- sam@xxxxxxxxxx
WEB http://wa4phy.net
Augusta Area Mesonet
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Martinez Georgia, 30907-1304

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