© 2004 Cisco Systems, Inc. All rights reserved. Printed in USA.
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292929
© 2004 Cisco Systems, Inc. All rights reserved.
RST-3508
9805_05_2004_c2
cat4500# sh proc cpu
CPU utilization for five seconds: 73%/17%; one minute: 74%; five minutes: 76%
PID Runtime(ms) Invoked uSecs 5Sec 1Min 5Min TTY Process
1 2358396 1705816 1382 0.32% 1.17% 0.68% 0 IP-EIGRP Router
2 2337276 21210 110196 0.00% 0.80% 0.89% 0 Check heaps
8 6551276 3786002 1730 3.05% 4.41% 4.70% 0 IP Input
9 24211844 1644250 14725 27.91% 26.06% 25.45% 0
TCP Timer
22 15663744 474459 33014 19.71% 20.67% 21.89% 0 TCP Driver
32 508 36 14111 5.07% 0.73% 0.15% 13 Virtual Exec
Cisco IOS Supervisor CPU Usage
• Make sure to distinguish interrupt and process level
• A CPU utilization value of 20% to 50% is normal, even under
minimal load with Power over Ethernet (PoE) line cards
Interrupt level
Interrupt level
Average
Processing Time
Total CPU Utilization (Process + Interrupt)
303030
© 2004 Cisco Systems, Inc. All rights reserved.
RST-3508
9805_05_2004_c2
CPU Troubleshooting Commands:
Cisco IOS Supervisor
• The Mgt Hi-Priority and Mgt Low-Priority are two processes
that Cisco Catalyst 4500 platform code runs
• These two processes share total CPU usage among other
Cisco IOS processes
The reason there are two processes is when a job in Cisco Catalyst 4500
platform takes longer time than expected or exceeds the max allocated
CPU time, the job would be run under low-priority for sometime until it's
usage is reduced, this would give other higher priority (IOS) process a
chance to run
• If the above two processes consume most of the CPU time
further investigation is now needed
cat4500# sh proc cpu
CPU utilization for five seconds: 99%/0%; one minute: 27%; five minutes: 15%
PID Runtime(ms) Invoked uSecs 5Sec 1Min 5Min TTY Process
(truncated)
25 1599072 5303348 301 10.01% 9.20% 8.20% 0 Cat4k Mgmt HiPri
26 1869444 522959 3574 86.16% 78.67% 36.07% 0 Cat4k Mgmt LoPri
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