Specifications

2-11
Cisco AS5x00 Case Study for Basic IP Modem Services
11/24/1999
Section 2 Commissioning the Cisco AS5300 Hardware
Verifying Basic Setup
1.5 Inspecting CPU Utilization
Enter the
show processes cpu
command to investigate high CPU utilization. High utilization causes
network performance problems. For example, knowing when the router is running at over 50%
utilization is critical. The router might start dropping packets if an unexpected traffic burst comes
through or if OSPF gets recalculated. Fast switching reduces CPU utilization.
Router#show processes cpu
CPU utilization for five seconds: 1%/0%; one minute: 0%; five minutes: 0%
PID Runtime(ms) Invoked uSecs 5Sec 1Min 5Min TTY Process
1 0 18973 0 0.00% 0.00% 0.00% 0 Load Meter
2 44 122 360 0.57% 0.06% 0.01% 98 Virtual Exec
3 70388 12820 5490 0.00% 0.04% 0.05% 0 Check heaps
4 0 2 0 0.00% 0.00% 0.00% 0 Pool Manager
5 0 2 0 0.00% 0.00% 0.00% 0 Timers
6 0 2 0 0.00% 0.00% 0.00% 0 Serial Backgroun
7 68 1876 36 0.00% 0.00% 0.00% 0 ARP Input
8 8 22758 0 0.00% 0.00% 0.00% 0 HC Counter Timer
9 0 2 0 0.00% 0.00% 0.00% 0 DDR Timers
10 0 2 0 0.00% 0.00% 0.00% 0 Dialer event
11 4 2 2000 0.00% 0.00% 0.00% 0 Entity MIB API
12 0 1 0 0.00% 0.00% 0.00% 0 SERIAL A'detect
13 0 4 0 0.00% 0.00% 0.00% 0 Critical Bkgnd
14 3396 165554 20 0.00% 0.00% 0.00% 0 Net Background
15 8 43 186 0.00% 0.00% 0.00% 0 Logger
16 377776 94479 3998 0.40% 0.23% 0.24% 0 TTY Background
17 4 94488 0 0.00% 0.00% 0.00% 0 Per-Second Jobs
18 0 47432 0 0.00% 0.00% 0.00% 0 CSM periodical p
19 0 47435 0 0.00% 0.00% 0.00% 0 CSM timer proces
20 0 2 0 0.00% 0.00% 0.00% 0 CSM Tone process
21 0 6 0 0.00% 0.00% 0.00% 0 Call Management
. . .
Snip
Look at the top line of the output. If you see high utilization numbers, for example over 50%, inspect
the columns 5Sec, 1Min, and 5Min. Find the process that uses the most CPU power. For an idle chassis,
numbers larger than two percent indicate a problem.