How come when issuing 'sho proc cpu' one gets a 5 sec, 1 min and 5 min
processor utilization which will be some large number, but that the list
of processes & their corresponding proc time does not add up to the time
interval average?
See below. The 5 minute average is 31%. I have filtered out the zero
values as can be seen. The resulting non-zero time processes add up to
less than say, 5%, but the 5 minute average is 31%. What's taking up
the rest of the CPU? Kernel processes?
Router#sh proc cpu | e 0.00%
CPU utilization for five seconds: 31%/20%; one minute: 32%; five
minutes: 31%
PID Runtime(ms) Invoked uSecs 5Sec 1Min 5Min TTY Process
3 9134376 452850 20170 5.06% 0.90% 0.72% 0 Check
heaps
11 4793060 54027297 88 0.49% 0.33% 0.32% 0 IPC Seat
Manager
41 6189208 33158352 186 0.49% 0.27% 0.29% 0 IP
Input
90 43215644 744506551 58 1.80% 1.85% 1.87% 0 Multilink
PPP
91 31468360 229878048 136 1.22% 1.42% 1.39% 0 Multilink
PPP ou
101 5396328 17159696 314 0.08% 0.26% 0.24% 0 BGP
Router
102 5369544 8211786 653 0.65% 0.42% 0.39% 0 BGP
I/O
The problem I'm really chasing is PPP Multilink CPU hogging. A small
4-T1 bundle increased an RSP4 from 5-10% avg utilization up to 25-30%
average. DCEF is enabled on all 4 T1s and the "sh run int" for the
multilink2 indicates DCEF is currently turned on. Strangely enough,
router squawks when you say "ip route-cache distributed" when configing
the multilink interface claiming distributed switching is not enabled on
mu2:
Router#conf t
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)#int mu2
Router(config-if)#ip route-cache distributed
Distributed switching not supported on Multilink2
gwRouter#sh run int mu2
Building configuration...
Current configuration:
!
interface Multilink2
...
no ip directed-broadcast
ip route-cache distributed
load-interval 30
no cdp enable
ppp multilink
multilink-group 2
end
Router#
Any recommendations on improving CPU utilization with MLPPP? Thanks for
any advice you have to share.
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