Re: Finding what's using the CPU

In <gkr*PtKgs@xxxxxxxxxxxxxxxxxxxxxxxxxxx>
Peter Benie <peterb@xxxxxxxxxxxxxxxxxxxxxx> wrote:

In article <20080630160239.68e74941@xxxxxxxxx>,
Tony Houghton <h@xxxxxxxxxxx> wrote:
I'm using Ubuntu 8.04 and every so often something starts running
which uses a significant amount of CPU and network access. I can't
work out what it is because it's "niced" and top excludes nice when
sorting apps by CPU usage, and I can't find a way to make it include
nice. Can anyone recommend a similar tool to top which isn't so
helpful to potential malware?

If the process exits after doing whatever it does, it'll show up in
the process accounting logs. I doubt that this is installed and turned
on by default. The package is called 'acct'.

What makes you think that a significant amount of CPU and network are
being used? If you're using the load (as reported by 'uptime') as a
guide, be aware that this isn't actually a measure of CPU usage -
running updatedb over an NFS share would give a high load and network
usage but without using much CPU.

It was actually something I wrote myself, called SysBars, that alerted
me to it. It works much the same way as gkrellm. top reports that about
40% of CPU time is in nice (judging by SysBars' readout I think it might
be 40% of one core only) but in the list of processes there's nothing
listed as using that much, just the usual <1%.

--
TH * http://www.realh.co.uk

.

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