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High CPU load average; how to find the root cause?

It is hard task to find the root cause of CPU load average many commands are used to give partial picture. I am not sure if somewhere we can find a tool that knows how many CPU's we have on machine ...
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1answer
101 views

What is the threshold for top to label a process as idle

With the top command I can toggle, whether to list idle processes or not. What is the CPU usage limit for a process to show up as idle or non-idle?
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1answer
3k views

What could be the cause for going to uniterruptable deep sleep state for this particular make process?

I am trying to understand 'D' state correctly. In my case, the following process went to 'D' state: make -f freac/CMakeFiles/freac_objs.dir/build.make freac/CMakeFiles/freac_objs.dir/build It is ...
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2answers
567 views

Why is the range of load average not 0-1+ for all cpu's together?

I know that load average is 0-1(or 0-1024) per cpu. E.g a busy quad-core can have a load average of 4.0 or higher. (e.g if there are many tasks). I understand it can be huge like 100+ etc. I also ...