How can this 'top' command output make sense? Load over 7 and
total CPU use ~5%
glen.j.barber at gmail.com
Mon May 25 19:31:25 UTC 2009
On Mon, May 25, 2009 at 3:24 PM, Wojciech Puchar
<wojtek at wojtek.tensor.gdynia.pl> wrote:
>> The CPU will perform the same, whether at 10% utilization, or at 100%
>> utilization, the system however won't.
>> That's the difference between load and utilization.
> still don't understand you.
> CPU will not perform the same at 10% utilization, it will perform 10 times
> less than at 100% utilization.
You are assuming this based on what?
> CPU load == CPU utilization == how big percentage of time CPU (or CPUs by
> average) are doing anything except being in idle loop or hlt/waiting for
> it's exactly the same words in that context.
Not true. top(1) can fully utilize the CPU. Doing so does not put
the system under full load.
> load average is how much processes (by average) is not doing calculations
> because something is not yet available and depends of computer resources(*)
> - like CPU time, disk I/O results etc..
> (*) - for example waiting on tty read is not calculated to load average as
> it's depends on human not computer.
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