[c-nsp] high cpu on VIP in 7507

[Troy Beisigl]

Hi.

We are seeing a problem with high cpu usage on a VIP4/80 card when  
traffic hits above 10Mbps. Has anyone seen this type of behavior?  
Details are below.


The IOS version is rsp-pv-mz.124-23.

GigabitEthernet6/0/0 is up, line protocol is up
   Hardware is cyBus GigabitEthernet Interface, address is  
0003.32fd.f0c0 (bia 0003.32fd.f0c0)
   Description: feed to cat1.5/6
   Internet address is X.X.X.X/28
   MTU 1500 bytes, BW 1000000 Kbit/sec, DLY 10 usec,
      reliability 255/255, txload 5/255, rxload 6/255
   Encapsulation ARPA, loopback not set
   Keepalive set (10 sec)
   Full-duplex, 1000Mb/s, link type is autonegotiation, media type is SX
   output flow-control is XON, input flow-control is XON
   ARP type: ARPA, ARP Timeout 04:00:00
   Last input 00:00:00, output 00:00:00, output hang never
   Last clearing of "show interface" counters 7w6d
   Input queue: 0/75/38707/81008 (size/max/drops/flushes); Total  
output drops: 10276
   Queueing strategy: fifo
   Output queue: 0/40 (size/max)
   30 second input rate 24360000 bits/sec, 4195 packets/sec
   30 second output rate 21260000 bits/sec, 4126 packets/sec
      9833124494 packets input, 4733684298220 bytes, 0 no buffer
      Received 11921351 broadcasts, 0 runts, 0 giants, 1350 throttles
      2683847777 input errors, 0 CRC, 2683489514 frame, 4395 overrun,  
370684 ignored
      0 watchdog, 11568950 multicast, 0 pause input
      0 input packets with dribble condition detected
      10530489310 packets output, 7707156852297 bytes, 0 underruns
      0 output errors, 0 collisions, 4 interface resets
      6002 unknown protocol drops
      0 babbles, 0 late collision, 0 deferred
      8 lost carrier, 0 no carrier, 0 pause output
      0 output buffer failures, 0 output buffers swapped out

VIP-Slot6   10:43:52 AM Tuesday Jul 6 2010 PDT


     111111111111111111111111111111111111111111111111111111111111
     222233333222221111100000333331111100000222223333322222222221
100
  90
  80
  70
  60
  50
  40
  30
  20
  10 ************************************************************
    0....5....1....1....2....2....3....3....4....4....5....5....6
              0    5    0    5    0    5    0    5    0    5    0
                CPU% per second (last 60 seconds)


     151111351111111511852381153122211111212111161211118331181111
     415869924534233096537174664310543638877434467042630685635444
100
  90                   *   *
  80                   *   *                           *    *
  70                   *   *                    *      *    *
  60                   *   *  *                 *      *    *
  50  *     *       *  **  *  *                 *      *    *
  40  *    **       *  **  *  *                 *      ***  *
  30  *    **       *  *****  **   *     * *    *      ***  #
  20  #****## *     ***##**# *#* ***  * ****    #**  * #****#*
  10 ############################################################
    0....5....1....1....2....2....3....3....4....4....5....5....6
              0    5    0    5    0    5    0    5    0    5    0
                CPU% per minute (last 60 minutes)
               * = maximum CPU%   # = average CPU%


     996111  11 2111177379959211 1      1  1     211591 11    1      
259 28254
      
990060991298000194619949920948867990778889895220938009799089999829934946
100 **                  ** *                        *                *
  90 **                  ** *                        *                *
  80 **              *   ** *                        *                 
*  *
  70 **              ** *** *                        *                 
*  *
  60 ***             ** *** *                        *                 
*  *
  50 ***             ** *****                       **                
**  * **
  40 ***             ********                       **                
**  * **
  30 ***        *    *********                   *  **               
***  ****
  20 *** *      *    *********             *     *  **               
*** *****
  10  
#############################*********#**#*#######*******#*******#****#*
     
0 
....5....1....1....2....2....3....3....4....4....5....5....6....6....7..
              0    5    0    5    0    5    0    5    0    5    0     
5    0
                    CPU% per hour (last 72 hours)
                   * = maximum CPU%   # = average CPU%



Thanks,

-Troy