Kevin and John,
A note about the "memory access errors".
If the router in question is using a MIPS CPU for example, interrupt
processing CPU utlization can also run higher than normal due to an error
called an alignment error. Alignment errors occur when the program running
on the CPU attempts to access a memory value at an address that violates the
memory alignment requirements of the CPU. On MIPS CPUs, 16 bit values must
begin at a memory address divisible by 2. 32 bit values must begin at a
memory address divisible by 4, and so on. If IOS attempts to access data at
an address that violates these restrictions, the CPU generates an exception
and calls a special IOS function that retreives the data in segments that
don't violate the restrictions. This exception funcation adds MANY more
instructions and more CPU time to an otherwise simple operation of accessing
a data item. For this reason, alignment errors can have a significant
negative impact on performance by consuming extra CPU cycles. You can check
the alignment errors by doing a show align from the CLI.
- raj
""Kevin Wigle"" <[EMAIL PROTECTED]> wrote in message
010d01c09520$ff4b7040$[EMAIL PROTECTED]">news:010d01c09520$ff4b7040$[EMAIL PROTECTED]...
> Dear group,
>
> Investigating a router that is starting to loaded down. When I do a sh
proc
> cpu I get 50% or cpu utilization but the stats don't seem to add up to
50%.
>
> Is there another way to try and see where the 50% is coming from?
>
> sh proc cpu
> CPU utilization for five seconds: 44%/44%; one minute: 50%; five minutes:
> 52%
> PID Runtime(ms) Invoked uSecs 5Sec 1Min 5Min TTY Process
> 1 43764 2491562 17 0.00% 0.00% 0.00% 0 Load Meter
> 2 116 36 3222 0.24% 0.05% 0.01% 66 Virtual Exec
> 3 18930504 1542973 12268 0.00% 0.12% 0.11% 0 Check heaps
> 4 0 1 0 0.00% 0.00% 0.00% 0 Chunk Manager
> 5 1876 1047 1791 0.00% 0.00% 0.00% 0 Pool Manager
> 6 0 2 0 0.00% 0.00% 0.00% 0 Timers
> 7 0 2 0 0.00% 0.00% 0.00% 0 Serial
Backgroun
> 8 0 1 0 0.00% 0.00% 0.00% 0 OIR Handler
> 9 22296 414731 53 0.00% 0.00% 0.00% 0 Environmental
mo
> 10 218428 427878 510 0.00% 0.00% 0.00% 0 ARP Input
> 11 0 2 0 0.00% 0.00% 0.00% 0 DDR Timers
> 12 0 2 0 0.00% 0.00% 0.00% 0 Dialer event
> 13 4 2 2000 0.00% 0.00% 0.00% 0 Entity MIB API
> 14 0 1 0 0.00% 0.00% 0.00% 0 SERIAL
A'detect
> 15 0 1 0 0.00% 0.00% 0.00% 0 Critical Bkgnd
> 16 1813952 1898284 955 0.00% 0.01% 0.00% 0 Net Background
> 17 280 401 698 0.00% 0.00% 0.00% 0 Logger
> 18 753540 12440407 60 0.00% 0.00% 0.00% 0 TTY Background
> 19 890280 12440425 71 0.00% 0.00% 0.00% 0 Per-Second
Jobs
> 20 4 2 2000 0.00% 0.00% 0.00% 0 VNM DSPRM MAIN
> 21 418788 12440411 33 0.00% 0.00% 0.00% 0 Partition
Check
> PID Runtime(ms) Invoked uSecs 5Sec 1Min 5Min TTY Process
> 22 0 1 0 0.00% 0.00% 0.00% 0 Net Input
> 23 31676 2491564 12 0.00% 0.00% 0.00% 0 Compute load
avg
> 24 6663988 207365 32136 0.00% 0.03% 0.00% 0 Per-minute
Jobs
> 25 271380 9070214 29 0.00% 0.00% 0.00% 0 NTP
> 26 0 2 0 0.00% 0.00% 0.00% 0 ATM OAM Input
> 27 0 2 0 0.00% 0.00% 0.00% 0 ATM OAM TIMER
> 28 376484 3755446 100 0.00% 0.00% 0.00% 0 ATM Periodic
> 29 0 1 0 0.00% 0.00% 0.00% 0 ATM ARP INPUT
> 30 41599556 18711784 2223 0.16% 0.33% 0.32% 0 IP Input
> 31 816012 1448197 563 0.00% 0.00% 0.00% 0 CDP Protocol
> 32 0 1 0 0.00% 0.00% 0.00% 0 Asy FS Helper
> 33 4 1 4000 0.00% 0.00% 0.00% 0 PPP IP Add
Route
> 34 684 20737 32 0.00% 0.00% 0.00% 0 MOP Protocols
> 35 0 1 0 0.00% 0.00% 0.00% 0 X.25 Encaps
Mana
> 36 0 1 0 0.00% 0.00% 0.00% 0 MPC Router
Proce
> 37 1579312 207411 7614 0.00% 0.00% 0.00% 0 IP Background
> 38 728 1317 552 0.00% 0.00% 0.00% 0 SSCOP Input
> 39 352 856 411 0.00% 0.00% 0.00% 0 SSCOP Output
> 40 36792 210450 174 0.00% 0.00% 0.00% 0 SSCOP Timer
> 41 196 59 3322 0.00% 0.00% 0.00% 0 ILMI Input
> 42 0 1 0 0.00% 0.00% 0.00% 0 SNMP Timers
> 43 518476 167742 3090 0.00% 0.00% 0.00% 0 ILMI Request
> PID Runtime(ms) Invoked uSecs 5Sec 1Min 5Min TTY Process
> 44 43616 205621 212 0.00% 0.00% 0.00% 0 ILMI Response
> 45 610604 1171380 521 0.00% 0.00% 0.00% 0 ILMI Timer
Proce
> 46 36 3 12000 0.00% 0.00% 0.00% 0 ATM PVC
Discover
> 47 0 2 0 0.00% 0.00% 0.00% 0 ATMSIG ILMI
Time
> 48 443584 12441294 35 0.00% 0.00% 0.00% 0 ATMSIG Timer
> 49 224 429 522 0.00% 0.00% 0.00% 0 ATMSIG Input
> 50 0 2 0 0.00% 0.00% 0.00% 0 ATMSIG Client
> 51 42576 304189 139 0.00% 0.01% 0.00% 0 TCP Timer
> 52 532 156 3410 0.00% 0.00% 0.00% 0 TCP Protocols
> 53 0 1 0 0.00% 0.00% 0.00% 0 Probe Input
> 54 0 1 0 0.00% 0.00% 0.00% 0 RARP Input
> 55 0 1 0 0.00% 0.00% 0.00% 0 HTTP Timer
> 56 0 1 0 0.00% 0.00% 0.00% 0 Socket Timers
> 57 16 6 2666 0.00% 0.00% 0.00% 0 DHCPD Receive
> 58 9109988 207362 43933 0.00% 0.13% 0.12% 0 IP Cache Ager
> 59 0 1 0 0.00% 0.00% 0.00% 0 PAD InCall
> 60 0 2 0 0.00% 0.00% 0.00% 0 X.25
Background
> 61 49512 207365 238 0.00% 0.00% 0.00% 0 TCP Intercept
Ti
> 62 0 2 0 0.00% 0.00% 0.00% 0 SPX Input
> 63 174548 207474 841 0.00% 0.00% 0.00% 0 Adj Manager
> 64 0 2 0 0.00% 0.00% 0.00% 0 Tag Input
> 65 0 2 0 0.00% 0.00% 0.00% 0 TC-ATM Proc
> PID Runtime(ms) Invoked uSecs 5Sec 1Min 5Min TTY Process
> 66 0 1 0 0.00% 0.00% 0.00% 0 ISDN Timer
> 67 0 1 0 0.00% 0.00% 0.00% 0 Time Range
Proce
> 69 4 2 2000 0.00% 0.00% 0.00% 0 CCVPM_HDSPRM
> 70 4 5 800 0.00% 0.00% 0.00% 0 CNS Event
Servic
> 71 0 1 0 0.00% 0.00% 0.00% 0 CCVPM_HTSP
> 72 4 1 4000 0.00% 0.00% 0.00% 0 CCSWVOICE
> 73 0 1 0 0.00% 0.00% 0.00% 0 ISDNMIB
Backgrou
> 74 0 1 0 0.00% 0.00% 0.00% 0 CallMIB
Backgrou
> 75 0 1 0 0.00% 0.00% 0.00% 0 SNMP
ConfCopyPro
> 76 0 1 0 0.00% 0.00% 0.00% 0 Syslog Traps
> 77 12 1 12000 0.00% 0.00% 0.00% 0 CCSWVOFR
> 78 29260520 868359 33696 0.00% 0.01% 0.03% 0 IP SNMP
> 79 32 5 6400 0.00% 0.00% 0.00% 0 SNMP Traps
> 80 0 2 0 0.00% 0.00% 0.00% 0 IP NAT Ager
> 82 36 41 878 0.00% 0.00% 0.00% 0 TCP Listener
> 84 908 103823 8 0.00% 0.00% 0.00% 0 DHCPD Timer
> 85 159208 3525037 45 0.00% 0.00% 0.00% 0 DHCPD Database
> 86 2087448 25762204 81 0.00% 0.00% 0.00% 0 BGP Router
> 87 422448 525767 803 0.00% 0.00% 0.00% 0 BGP I/O
> 88 17308692 207455 83436 0.00% 0.08% 0.09% 0 BGP Scanner
>
> tia
>
> Kevin Wigle
>
>
> _________________________________
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