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Cisco Bug: CSCvt47828 - Lot of SMs are in warn state because of "mme_app_allocate_sgsap_msg()" is taking almost 300MB memory

Last Modified

Sep 03, 2020

Products (1)

  • Cisco ASR 5000 Series

Known Affected Releases

21.5.17.71013

Description (partial)

-> On analysis of heap, I found that function "mme_app_allocate_sgsap_msg()" is taking almost 300MB of memory.

Symptom:
-> On analysis of heap, I found that function "mme_app_allocate_sgsap_msg()" is taking almost 300MB of memory.

Conditions:
We have extracted following call flow from the core files.
 
MME_EMM_STATE_REGISTERED_CONNECTED
MME_EMM_EVENT_HO_EVT
$55 = MME_PROTOCOL_INTERNAL
$56 = MME_INTERNAL_MESSAGE_TYPE_X2_HO_CONFIRM
timestamp = 1581516060
 
MME_EMM_STATE_REGISTERED_CONNECTED
MME_EMM_EVENT_TAU_REQ
$57 = MME_PROTOCOL_NAS
NAS msg: 72 Hex-Value: 48
timestamp = 1581516060
 
MME_EMM_STATE_REGISTERED_CONNECTED
MME_EMM_EVENT_CSFB_EVT
$58 = MME_PROTOCOL_SGS
10
timestamp = 1581516060
 
MME_EMM_STATE_REGISTERED_CONNECTED
MME_EMM_EVENT_COMMON_PROC_REQ
$59 = MME_PROTOCOL_NAS
NAS msg: 74 Hex-Value: 4a
timestamp = 1581516060
 
MME_EMM_STATE_REGISTERED_CONNECTED
MME_EMM_EVENT_TAU_REQ
$60 = MME_PROTOCOL_INTERNAL
$61 = MME_INTERNAL_MESSAGE_TYPE_TAU_CONFIRM
timestamp = 1581516060
 
MME_EMM_STATE_REGISTERED_CONNECTED
MME_EMM_EVENT_PATH_SWITCH_REQ
$62 = MME_PROTOCOL_S1
S1 msg: 35 Hex-Value: 23
timestamp = 1581516061
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