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Cisco Bug: CSCvv17488 - [ISR4K + SM-X-ES3-* module] Memory leak in iomd

Last Modified

Oct 09, 2020

Products (1)

  • Cisco 4000 Series Integrated Services Routers

Known Affected Releases

16.9.5

Description (partial)

Symptom:
The router might experience a memory leak under iomd process

Router# show platform software status control-processor brief

Memory (kB)
 Slot  Status    Total     Used (Pct)     Free (Pct) Committed (Pct)
  RP0 Healthy  4037108  3324664 (82%)   712444 (18%)   3659316 (91%)


Router# show processes memory platform sorted
System memory: 4037108K total, 3325212K used, 711896K free,
Lowest: 711896K
   Pid    Text      Data   Stack   Dynamic       RSS     Total              Name  
--------------------------------------------------------------------------------
 22399  263378    892464     136       284    892464   3628288   linux_iosd-imag  
 27792   12875    160344     136     24856    160344   2233032     fman_fp_image  
 27735      90    182392     136     24888    182392   1748544        cpp_cp_svr  
  1144     519    786220     136    743764    786220   1540188              iomd  
 19635    7306     68616     136      2540     68616   1321180           fman_rp  


Router# show platform software process memory R0 all sorted
   Pid      VIRT       RSS       PSS      Heap    Shared   Private              Name  
------------------------------------------------------------------------------------
 22399   3628288    892468    828158       284     89472    802996   linux_iosd-imag  
  1144   1540188    786220    753887    743764     36892    749328              iomd  
 27621   1187852    283752    240924       404     63704    220048    qfp-ucode-utah  


Router#show platform software process list RP active sort memory
Name                     Pid    PPid  Group Id  Status    Priority  Size        
------------------------------------------------------------------------------
linux_iosd-imag        22399   18958     22399  S               20  3715362816  
fman_fp_image          27792   26450     27792  S               20  2286620672  
cpp_cp_svr             27735   25258     27735  S               20  1790504960  
iomd                    1144     557      1144  S               20  1577271296  
fman_rp                19635   17872     19635  S               20  1352884224  



Router# show platform software status control-processor brief

Memory (kB)
 Slot  Status    Total     Used (Pct)     Free (Pct) Committed (Pct)
  RP0 Critical  4037108  3845700 (95%)   191408 ( 5%)   4306632 (107%)

Router# show processes memory platform sorted
System memory: 4037108K total, 3846252K used, 190856K free,
Lowest: 190856K
   Pid    Text      Data   Stack   Dynamic       RSS     Total              Name  
--------------------------------------------------------------------------------
 22399  263378    812740     136       284    812740   3628416   linux_iosd-imag  
 27792   12875    129468     136     24856    129468   2233032     fman_fp_image  
  1144     519   1414072     136   1389640   1414072   2186064              iomd  +627852
 27735      90    165660     136     24888    165660   1748544        cpp_cp_svr  

Router# show platform software process memory R0 all sorted
   Pid      VIRT       RSS       PSS      Heap    Shared   Private              Name  
------------------------------------------------------------------------------------
  1144   2186064   1414080   1397124   1389640     18900   1395180              iomd  +627860
 22399   3628416    812744    786847       284     33148    779596   linux_iosd-imag  
 27621   1187852    275868    233038       404     63708    212160    qfp-ucode-utah  
 27735   1748544    165660    106331     24888     86856     78804        cpp_cp_svr  

Router# show platform software process list RP active sort memory
Name                     Pid    PPid  Group Id  Status    Priority  Size        
------------------------------------------------------------------------------
linux_iosd-imag        22399   18958     22399  S               20  3715493888  
fman_fp_image          27792   26450     27792  S               20  2286620672  
iomd                    1144     557      1144  S               20  2238525440  +661254144
cpp_cp_svr             27735   25258     27735  S               20  1790504960

Conditions:
It is seen  when the router has a switch module and a POE power supply
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