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terintamel
newbie
Topic Author
Posts: 47
Joined: Sun Sep 05, 2010 3:09 am

CPU usage does not match Profile usage

Sat Apr 20, 2019 10:34 pm

Question. Should the CPU usage shown in the Profile tool match the CPU usage shown in Winbox and shown in the /System Resources section?

I am trying to track down a CPU usage issue viewtopic.php?f=15&t=147817 and I am having a hard time because the CPU usage between Profile and Resources do not match.

When I total all the items listed in Profile it shows cpu0 using 23% but under /system resources it shows cpu0 using 46%. Which is correct?
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terintamel
newbie
Topic Author
Posts: 47
Joined: Sun Sep 05, 2010 3:09 am

Re: CPU usage does not match Profile usage

Sat Apr 20, 2019 10:37 pm

If I do an internal UDP btest to 127.0.0.1 the CPU usage in Profile and Resources then do match and show 100%. I am confused.
 
terintamel
newbie
Topic Author
Posts: 47
Joined: Sun Sep 05, 2010 3:09 am

Re: CPU usage does not match Profile usage

Mon Apr 22, 2019 3:25 am

So sometimes the Profile listed usage and the Resource listed usage are within a few % but at other times they can be 20-30% off from each other.

Right now Winbox/Resource listed usage is 47%. When looking at the usage under /system resources per core It is as follows.

cpu0 - 44
cpu1 - 44
cpu2 - 36
cpu3 - 64

So add them all together and divide by 4 you get 47%

Then during the same time the profile tool listed usage as follows
ethernet - 7.0
firewall - 4.8
management - 0.6
networking - 11.8
queuing - 2.0
routing - 5.2
unclassified - 0.8
winbox - 0.0
Total - 32.2%

So which is correct? It is not a lag thing where the profile tool lags a few seconds behind the resource listed usage as at times it is always on average 10-20% lower. For example I can watch the winbox listed usage be reaching 60% usage and the Profile tool listed usage never gets above 35-40%
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