CPU usage displays as 0.00
Posted: Mon Apr 23, 2012 11:29 am
Have been wondering why my CPU usage amounts almost invariably read 0.00 even though the router was working quite hard. Just had a look and tried to generate some CPU usage, and managed to put some on there, but it seems the issue is that the GUI doesn't count all kinds of CPU usage as CPU usage.
Gui Output:
CPU Load Averages:0.02 / 0.01 / 0.00 (1/5/15 minutes)
Top Output:
CPU: 0% usr 0% sys 0% nic 77% idle 0% io 0% irq 22% sirq
Perhaps it'd be good if we can count anything that's not "idle" as "used" as that 22% servicing interrupts for routing counted under sirq isn't available to do other work...?
Any thoughts, or am I thinking about this in totally the wrong way?
Gui Output:
CPU Load Averages:0.02 / 0.01 / 0.00 (1/5/15 minutes)
Top Output:
CPU: 0% usr 0% sys 0% nic 77% idle 0% io 0% irq 22% sirq
Perhaps it'd be good if we can count anything that's not "idle" as "used" as that 22% servicing interrupts for routing counted under sirq isn't available to do other work...?
Any thoughts, or am I thinking about this in totally the wrong way?