Thanks for the tip! In my case though there were no single processes loading
the cpu:
#sh proc cpu | e 0.00
CPU utilization for five seconds: 48%/35%; one minute: 32%; five minutes:
32%
PID Runtime(ms) Invoked uSecs 5Sec 1Min 5Min TTY Process
196 21322228 427846338 49 0.31% 0.16% 0.17% 0 IP Input
460 5474156 285374 19182 0.55% 0.07% 0.03% 0 BGP Scanner
466 2868 6596 434 11.59% 0.96% 0.23% 1 Virtual Exec
A nice command to check how much traffic goes to the cpu:
#show ibc
Interface information:
Interface IBC0/0(idb 0x13764774)
5 minute rx rate 285758000 bits/sec, 23046 packets/sec
5 minute tx rate 594270000 bits/sec, 91869 packets/sec
110219721075 packets input, 170099314990812 bytes
109544766443 broadcasts received
218978746093 packets output, 173382310588137 bytes
283552367 broadcasts sent
0 Bridge Packet loopback drops
109343818646 Packets CEF Switched, 8 Packets Fast Switched
0 Packets SLB Switched, 0 Packets CWAN Switched
Label switched pkts dropped: 0
0 total martian ip v4 packets dropped
Xconnect pkts processed: 0, dropped: 0
Total paks copied for process level 0
Total throttle drops 612719 Input queue drops 2662
IBC resets = 1; last at 09:35:51.771 UTC Mon Aug 11 2008
Dev_Instance=0x1377F774
In our case the load was caused by packet fragmentation performed by the CPU
in interrupt mode I suppose.
Cheers,
Mihai
-----Original Message-----
From: Ge Moua [mailto:moua0...@umn.edu]
Sent: Thursday, February 19, 2009 7:05 PM
To: Mihai Todor
Cc: cisco-nsp@puck.nether.net
Subject: Re: [c-nsp] high cpu load not by processes
sh proc cpu | ex 0.00
sh proc cpu detailed [pid] | ex 0.00
Regards,
Ge Moua | Email: moua0...@umn.edu
Network Design Engineer
University of Minnesota | Networking & Telecommunications Services
Mihai Todor wrote:
> Hello,
>
> Do you have any ideea on how to see what interrups are loading a router's
> CPU?
>
> We're experiencing a high cpu load (60%) on a router, yet resources are
not
> consumed by processes. Some background info - the machine is a 7609-S
router
> with redundant SUP720-3BXL supervizors having a PE role.
>
> Thanks!
>
> Mihai
>
>
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