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[ubuntu] 50% CPU usage, but no processes using CPU

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http://ubuntuforums.org – My netbook is running slow, and System Monitor shows ~45% usage on each of two CPUs. However, the "Processes" tab of System Monitor shows all processes at 0% CPU usages. Any ideas for tools to help me investigate this? (Using UbuntuEEE on Asus EEE 900A) (Hardware)

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Submitted by colm on 07/21/2009

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Gnome System Monitor, an application that enables users to display basic system information and to monitor system processes, usage of system resources, and file systems, is now at version 3.7.5.

The application shows active processes and how processes are related to each other.

This is my first question here and i may not be very well versed with AIX too. But neverthless i am trying to solve the problem at hand and this is what i am stuck with.

We have an AIX 6.1 machine up and running. But the CPU usage as shown on topas seems to be always 100%. (user ~70% + kernel ~30%).

[ubuntu] Memory Usage tools 19 weeks 5 days ago

Hi,

I'm using the command "top" to see how much memory the system is using (ram). Now, when I go to the desktop and run the system monitor tool that comes by default with the OS, it shows lot less memory usage then "top".

Top shows I'm using 1.7GB memory while the system monitor tool shows I'm using 560MB...

I have a home server sometimes running at a high CPU usage rate of about 50 to 70 percents.

In htop, my favorite process manager, I can sort the processes by CPU usage, but often there isn't any process consuming more than 0 % CPU.

If I leave the System Monitor (KSysGuard) open for too long, it begins to display in the Process Table processes that are no longer running. For some reason, if I start a process, the entry may not disappear from the Process Table even when I close it. I know they aren't zombie processes (at least, they're not marked as such).

I had nothing better to do last night than stare at my system monitor.

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I want to have a whole list of all the processes with their memory usage. I want to sum up the memory usage of similar processes (i.e. processes with the same name or the same father process)

How can I do that, e.g. with command line tools?