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Cisco Bug: CSCvv09753 - BGP mass prefix withdrawal causing high CPU spikes for event_manager and policyelem

Last Modified

Sep 09, 2020

Products (1)

  • Cisco Nexus 9000 Series Switches

Known Affected Releases

7.0(3)I7(6)

Description (partial)

Symptom:
# sh processes cpu | exclude 0.00


PID    Runtime(ms)  Invoked   uSecs  1Sec    Process
-----  -----------  --------  -----  ------  -----------
   52    229124253  317691941    721   1.00%  ksmd
28182         1027       290   3543  31.25%  event_manager
28183         1948       523   3726   8.75%  policyelem
28341      1286455  10566658    121   1.50%  vman
28389          263       208   1266   0.50%  confelem
28466     12223331  12799864    954   0.50%  diagmgr
28531       183686   9203510     19   0.50%  nginx
28535       290028   5637064     51  15.75%  device_test
28689          275       123   2240   0.50%  adjmgr
30088       231051   4497027     51   0.50%  l2rib
30269      2085655   7006841    297   0.50%  diag_port_lb
30270     79629350  558705133    142   1.50%  ethpm
30409          365       364   1004   5.00%  bgp
30429          353       284   1245   0.50%  ospf
31735    183889131  2147483647     16   1.50%  mts-sync-thr




PID Runtime(ms) Invoked uSecs 1Sec Process
----- ----------- -------- ----- ------ -----------
11833 187091199 2147483647 17 2.00% mts-sync-thr
27844 996 282 3532 30.25% event_manager
27845 1928 541 3564 8.75% policyelem




PID Runtime(ms) Invoked uSecs 1Sec Process
----- ----------- -------- ----- ------ -----------
27844 996 282 3532 34.25% event_manager
27845 1928 541 3564 23.00% policyelem
28048 287 921 311 2.00% confelem

Conditions:
- Platform must have DME enabled.
- Router is spine/RR.
- Mass withdrawal of BGP prefixes.
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