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6513 SUP720 CPU high due to VLC player multicast streams

Hi,

We are running one linux PC with 3 VLC streams for our company Add, last couple days I notices that our multicast source router, where this VLC PC connected is running on high cpu utilization, and I did the following troubleshooting

After I disconneted this PC form network, the CPU process is normal.

The PC is running on Linux, what could be the probelm.


A-DISTT1#sh processes cpu sorted | exclude 0.00%
CPU utilization for five seconds: 92%/91%; one minute: 25%; five minutes: 22%
PID Runtime(ms)   Invoked      uSecs   5Sec   1Min   5Min TTY Process
395    97350452 389572702        249  0.15%  0.74%  0.69%   0 PIM Process     
155   2974377924264655218          0  0.15%  0.96%  1.57%   0 IP Input        
396    57168908  68962609        828  0.15%  0.39%  0.26%   0 MLSM Process    
   3       12376      2411       5133  0.07%  0.41%  0.47%   1 SSH Process     
350   121028320 392568888        308  0.07%  0.53%  0.53%   0 Port manager pe

A-DISTT2#sh processes cpu sorted | exclude 0.00%
CPU utilization for five seconds: 45%/33%; one minute: 38%; five minutes: 23%
PID Runtime(ms)   Invoked      uSecs   5Sec   1Min   5Min TTY Process
155   347591256 330574202       1051 10.87%  2.20%  1.46%   0 IP Input        
395   154942084 526796334        294  0.47%  0.70%  0.53%   0 PIM Process     
397    34611708  35864894        965  0.15%  0.09%  0.09%   0 MLSM Stat Proces
396    39788256 153516402        259  0.15%  0.21%  0.16%   0 MLSM Process    

A-DISTT1#sh processes cpu history
                                                             
    2222222111112222211111222222222211111111112222211111111111
    5577777999991111166666333332222299999555556666633333555552
100                                                          
90                                                          
80                                                          
70                                                          
60                                                          
50                                                          
40                                                          
30 *******                                   *****          
20 ***********************************************     *****
10 **********************************************************
   0....5....1....1....2....2....3....3....4....4....5....5....
             0    5    0    5    0    5    0    5    0    5   
               CPU% per second (last 60 seconds)
                                                             
    2159989999899998899999999999999889997999989999999999999999
    6247377575427883157615748084586688842776862785125887682872
100    *  ****  ***  *** ** * * ***  **  ****  ***  ****** **
90    ******* ****  ******************* *********************
80    ********************************* *********************
70    *******************************************************
60    *******************************************************
50   ************************************#************#***#**
40   *##*##****###****#*#####*####**#****###****#*##*##*####*
30 * *#######*#########################*####*################
20 # *#######################################################
10 ##########################################################
   0....5....1....1....2....2....3....3....4....4....5....5....
             0    5    0    5    0    5    0    5    0    5   
               CPU% per minute (last 60 minutes)
              * = maximum CPU%   # = average CPU%
                                                                         
    9224236422232233272499999999999999999999999999999999999999999999999999
    8770918257566815646499999999999999999999999999999999999899999999999999
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%

-------------------------------------------------------------------------------------

A-DISTT2#sh processes cpu history
                                                             
    111                                                      
    1114444444444333339999911111888884444466666444444444422222
100                                                          
90                                                          
80                                                          
70                                                          
60                                                          
50                                                          
40                                                          
30                                                          
20                                                          
10 ***               *****     *****     *****              
   0....5....1....1....2....2....3....3....4....4....5....5....
             0    5    0    5    0    5    0    5    0    5   
               CPU% per second (last 60 seconds)
                                                             
       9989999999999999999999979999999998889998899998999899999
    9798707677387474683822447660644006864779868968758886289656
100    ** **** ** * ** *    **  *    ***   ***  **** *** *****
90    ** ******************** ********* *************** *****
80    *******************************************************
70    *******************************************************
60    *******************************************************
50    ******************************************#************
40    ##*#####*###***##***###*####**###***###*####**###***##*
30    #######################################################
20    #######################################################
10 ***#######################################################
   0....5....1....1....2....2....3....3....4....4....5....5....
             0    5    0    5    0    5    0    5    0    5   
               CPU% per minute (last 60 minutes)
              * = maximum CPU%   # = average CPU%
                                                                         
    9922417242123212422199999999999999999999999999999999999999999999999999
    9733570000945192502989999999999999999999999999999999999999999999899999
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%

You can analysis by seeing the packet drops


A-DISTT1#sh int | in up | drop

Vlan120 is up, line protocol is up
  Input queue: 0/75/1452/1452 (size/max/drops/flushes); Total output drops: 0
  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0


source and destination and where the packet drop is ocurring


A-DISTT1#sh buffers input-interface vlan 120 header

Buffer information for Big buffer at 0x45A30684
  data_area 0x826A144, refcount 1, next 0x5026A528, flags 0x200
  linktype 7 (IP), enctype 1 (ARPA), encsize 14, rxtype 1
  if_input 0x47B08364 (Vlan120), if_output 0x0 (None)
  inputtime 00:00:00.000 (elapsed never)
  outputtime 21w5d (elapsed 21:33:01.704), oqnumber 65535
  datagramstart 0x826A1BA, datagramsize 1358, maximum size 1740
  mac_start 0x826A1BA, addr_start 0x826A1BA, info_start 0x0
  network_start 0x826A1C8, transport_start 0x826A1DC, caller_pc 0x41FFDF6C

  source: 192.168.120.200, destination: 239.232.3.2, id: 0xFA3C, ttl: 1,
  TOS: 0 prot: 17, source port 39598, destination port 5000

Buffer information for Big buffer at 0x45A5FA00
  data_area 0x8324744, refcount 1, next 0x5027A814, flags 0x200
  linktype 7 (IP), enctype 1 (ARPA), encsize 14, rxtype 1
  if_input 0x47B08364 (Vlan120), if_output 0x0 (None)
  inputtime 00:00:00.000 (elapsed never)
  outputtime 17w5d (elapsed 4w0d), oqnumber 65535
  datagramstart 0x83247BA, datagramsize 1358, maximum size 1740
  mac_start 0x83247BA, addr_start 0x83247BA, info_start 0x0
  network_start 0x83247C8, transport_start 0x83247DC, caller_pc 0x41FFDF6C

  source: 192.168.120.200, destination: 239.232.3.3, id: 0x156B, ttl: 1,
  TOS: 0 prot: 17, source port 50428, destination port 5000

A-DISTT2#sh buffers input-interface vlan 120 header

Buffer information for Big buffer at 0x45A76AF0
  data_area 0x839B744, refcount 1, next 0x502883FC, flags 0x200
  linktype 7 (IP), enctype 1 (ARPA), encsize 14, rxtype 1
  if_input 0x52C86C6C (Vlan120), if_output 0x0 (None)
  inputtime 00:00:00.000 (elapsed never)
  outputtime 14w5d (elapsed 21:21:01.044), oqnumber 65535
  datagramstart 0x839B7BA, datagramsize 1358, maximum size 1740
  mac_start 0x839B7BA, addr_start 0x839B7BA, info_start 0x0
  network_start 0x839B7C8, transport_start 0x839B7DC, caller_pc 0x41FFDF6C

  source: 192.168.120.200, destination: 239.232.3.2, id: 0xDDD3, ttl: 1,
  TOS: 0 prot: 17, source port 46214, destination port 5000

Buffer information for Big buffer at 0x45A77208
  data_area 0x839D344, refcount 1, next 0x502827C4, flags 0x200
  linktype 7 (IP), enctype 1 (ARPA), encsize 14, rxtype 1
  if_input 0x52C86C6C (Vlan120), if_output 0x0 (None)
  inputtime 00:00:00.000 (elapsed never)
  outputtime 14w5d (elapsed 16:51:56.084), oqnumber 65535
  datagramstart 0x839D3BA, datagramsize 1358, maximum size 1740
  mac_start 0x839D3BA, addr_start 0x839D3BA, info_start 0x0
  network_start 0x839D3C8, transport_start 0x839D3DC, caller_pc 0x41FFDF6C

  source: 192.168.120.200, destination: 239.232.3.3, id: 0xF9AD, ttl: 1,
  TOS: 0 prot: 17, source port 39010, destination port 5000

Regards

-Saji

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