Dropbear around 50% CPU normal?

[LukeH]

Hi,
On my AC56U with merlin 378.65_2 I just noticed this:

  PID  PPID USER     STAT   VSZ %VSZ CPU %CPU COMMAND
18232 29338 admin    R     1172  0.4   0 49.2 dropbear -p [XXX] -s -j -k

Where [XXX] is the port I use as SSH service port. Is it normal that %CPU as it never seem to go under 45?
Thanks

 

[Nullity]

Is this while you are logged in? If so, maybe.

The application you are using to view the CPU usage, over what time-span is the average CPU usage calculated? The larger the time-span the more I would be concerned, and vice versa.

 

[LukeH]

Well, using top I was connected.
Attached is a picture from the administration GUI (I don't know how I could see CPU% other then logged in).
Around the red line (on pic) I killed the ssh client and it doesn't seem to improve.
But also while I was connected top didn't reflect the close to 100% (edit: 110-115 actually) usage summed on both cores as the web GUI seem to show.
I'm running OwnCloud and Transmission via chrouted debian.

EDIT:
Using 2 SSH session won't make top show higher value and from debian top shows

  PID USER      PR  NI    VIRT    RES    SHR S  %CPU %MEM     TIME+ COMMAND
18232 root      20   0    1172    208    168 R  98.0  0.1 494:35.89 dropbear

 

[Nullity]

Forget about "%CPU" (which is the average CPU usage during top's configured refresh interval) and configure top to display "TIME" or "TIME+", which displays the total CPU time since the task began, which is the most likely the measurement you want.
http://man7.org/linux/man-pages/man1/top.1.html

Personally I would install "htop" (via entware), rather than use "top".



Disregarding these measurements, are you having any noticeable network problems?