[arm-allstar] High CPU

[David McGough]

Hi Bryan,

The answer to this question is simply that the "load average" numbers show
more that just CPU use. Under Linux, the load average is a combined number
including CPU usage, I/O usage, VM wait conditions (like swapping) and
time spent where a program is waiting on system resources (like
uninterpretable wait conditions), etc. It's easy to produce a program that
generates a 1.0 load average, while using virtually no CPU time or other
system resources.

The vmstat program (man vmstat) is one which will probably give you a
better picture of actual system utilization.

And, I just googl'ed the subject and found some possibly useful web pages
with more in-depth discussion:

https://unix.stackexchange.com/questions/393566/what-does-proc-loadavg-s-cpu-and-io-utilization-mean

http://www.brendangregg.com/blog/2017-08-08/linux-load-averages.html


73, David KB4FXC




On Thu, 23 Jan 2020, "Bryan St Clair via ARM-allstar" wrote:

> All,
> 
> I have noticed a higher than normal CPU load on my Pi.  Running 1 radio and
> a 2nd radioless setup, streaming too.
> 
> Loads are always in the .30+ range and I have seen them in the .70+ a few
> times.  Maybe I'm getting old, but I don't really remember them over even
> .10 most days.
> 
> Pi 3B, no real changes of recent, updates performed this week, current
> build.
> 
> What CPU loads are you seeing? I was checking on CLI.
> 
>