09-18-2013 02:51 AM - edited 03-04-2019 09:04 PM
Hi,
I have a cisco 2900 ISR G2 with a high cpu load and with the command "sh processes cpu sorted", I can't figure which process is the cause
If we look this example, the load is about 25% but the load total of process is around 2%...
CPU utilization for five seconds: 26%/24%; one minute: 23%; five minutes: 25%
PID Runtime(ms) Invoked uSecs 5Sec 1Min 5Min TTY Process
189 31112 1197414086 0 0.39% 0.35% 0.34% 0 HQF Output Shape
326 77808 346608032 0 0.39% 0.34% 0.32% 0 HSRP Common
120 9406884 308648542 30 0.31% 0.33% 0.30% 0 IP Input
3 1592 928 1715 0.15% 0.24% 0.12% 388 SSH Process
128 23956 653917473 0 0.15% 0.20% 0.21% 0 Ethernet Msec Ti
342 3340332 58413774 57 0.15% 0.12% 0.13% 0 OSPF-100 Hello
327 2882656 152727925 18 0.07% 0.07% 0.07% 0 HSRP IPv4
166 19060 149926818 0 0.07% 0.04% 0.05% 0 IPAM Manager
85 33800 4806733 7 0.07% 0.10% 0.08% 0 Per-Second Jobs
117 11952 9610784 1 0.07% 0.02% 0.01% 0 BPSM stat Proces
122 24040 4801629 5 0.07% 0.00% 0.00% 0 FHRP Main thread
328 13148 4693011 2 0.07% 0.04% 0.05% 0 CFT Timer Proces
33 1916 5008163 0 0.07% 0.00% 0.00% 0 ARP Background
13 3438280 80038 42958 0.00% 0.07% 0.05% 0 Licensing Auto U
Maybe I have missed to look something ?
Thanks for any tips
Solved! Go to Solution.
09-19-2013 03:36 AM
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Posting
Usually. In your case, 24% is interrupt CPU and 2% is other process CPU. Interrupt CPU within 2 to 4 percent of total CPU is generally good.
What you might check, is whether the interrupt CPU appears to corresponds to the total traffic passing through your router and rough match that router's documented PPS (packets per second) rate. If the PPS rate seems abnormally low, you might have packets causing extra forwarding load. It can be difficult to identify cause for this as we don't have much visibility into "interrupt" forwarding.
09-18-2013 02:55 AM
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The Author of this posting offers the information contained within this posting without consideration and with the reader's understanding that there's no implied or expressed suitability or fitness for any purpose. Information provided is for informational purposes only and should not be construed as rendering professional advice of any kind. Usage of this posting's information is solely at reader's own risk.
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In no event shall Author be liable for any damages whatsoever (including, without limitation, damages for loss of use, data or profit) arising out of the use or inability to use the posting's information even if Author has been advised of the possibility of such damage.
Posting
The bulk of your CPU is "interrupt" CPU which normally is the CPU load for forwarding "normal" traffic.
09-19-2013 02:16 AM
Thanks joseph
so the remaining cpu use is for forwarding process right ?
09-19-2013 03:36 AM
Disclaimer
The Author of this posting offers the information contained within this posting without consideration and with the reader's understanding that there's no implied or expressed suitability or fitness for any purpose. Information provided is for informational purposes only and should not be construed as rendering professional advice of any kind. Usage of this posting's information is solely at reader's own risk.
Liability Disclaimer
In no event shall Author be liable for any damages whatsoever (including, without limitation, damages for loss of use, data or profit) arising out of the use or inability to use the posting's information even if Author has been advised of the possibility of such damage.
Posting
Usually. In your case, 24% is interrupt CPU and 2% is other process CPU. Interrupt CPU within 2 to 4 percent of total CPU is generally good.
What you might check, is whether the interrupt CPU appears to corresponds to the total traffic passing through your router and rough match that router's documented PPS (packets per second) rate. If the PPS rate seems abnormally low, you might have packets causing extra forwarding load. It can be difficult to identify cause for this as we don't have much visibility into "interrupt" forwarding.
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