Weird system cpu usage

Daniel Gerzo danger at rulez.sk
Wed Mar 19 13:22:09 PDT 2008


Hello Oliver,

Wednesday, March 19, 2008, 6:53:36 PM, you wrote:

> Charlie Root <root at ha-web1.hockeyarena.net> wrote:
 >> [...]

> It's preferable to send mail as a real user, not as root,
> for various reasons.

I know, I've just forgot to edit the headers, my apologies.

 >> I have to report, that I have a very strange cpu usage by system (as
 >> the `top' reports).

> You haven't mentioned what exactly you think is strange
> in your top(1) output.  I think it looks pretty normal
> under the given circumstances.

What do you mean by "given" circumstances? I don't think that 50+% cpu
usage by system is that normal.

 >> root@[ha-web1 ~]# vmstat -i
 >> interrupt                          total       rate
 >> irq1: atkbd0                          12          0
 >> irq16: ohci0                           1          0
 >> irq17: ohci1 ohci3                     1          0
 >> irq18: ohci2 ohci4                     1          0
 >> irq20: em0                      86255835       1361
 >> irq22: em1 atapci0           18611379049     293795

> Now that looks unusual indeed.  Do you get that rate
> on irq22 right after boot, before the services have
> started?  It looks like either hardware or driver
> problems.  Do you have polling enabled on em1?

No, the rate slowly increases after the system boots. Polling is
disabled at the moment.

-- 
Best regards,
 Daniel                            mailto:danger at rulez.sk



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