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Cisco Bug: CSCul47441 - mmemgr CPU utilization shoots to 99% during card migration tests

Last Modified

Jan 29, 2017

Products (1)

  • Cisco ASR 5000 Series

Known Affected Releases

14.0(1) 15.0(14) 16.0(1)

Description (partial)

Symptom:
mmemgr CPU utilization shoots to 99% during card migration tests

Conditions:
The CPU profiler output for MME manager shows high CPU usage (99%) 
It points to most of the time spent in handling sn_event_timer.

Profile period 150ms [UP/DN]; depth 8 [1-8]; total samp 66
Filter: facility=120000 instance=1
     %    Samples  Function*
 37.9%         25  sn_event_timer_new()
                   [075b1dc3/X] mmemgr_aggregate_msg_to_sessmgr()
                   [075b09d8/X] mmemgr_send_pdu_to_smgr()
                   [075ad91f/X] MmLiSctDatInd()
                   [0c4d7eab/X] SbUiSctDatInd()
                   [0c485688/X] sbSqInSendUp()
                   [0c48645b/X] sbSqArrive()
                   [0c48a678/X] sbSgAssemble()
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