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Analyze alarm information deadloop occur on NE40E

Publication Date:  2012-07-27 Views:  38 Downloads:  0
Issue Description
1.topologoy:
N/A
2.version:
NE40E&80E V600R001C00SPC800
3.problem description:
Customer face the problem find one NE40E lpu card reset again and again.
4.LPU BOM:
03030FUK,NetEngine80E,CR53LPUF0,Flexible Card Line Processing Unit(LPUF-10,four slots)
Alarm Information
-----------------display alarm all-------------------
Index  Level      Date      Time                        Info
1      Emergency  11-02-24  01:17:26    Because of task deadloop occurs, the entity of LPU8 is resetting, not ready
2      Emergency  11-02-24  01:18:28    Because of task deadloop occurs, the entity of LPU8 is resetting, not ready,
3      Emergency  11-02-24  01:21:50    Because of task deadloop occurs, the entity of LPU8 is resetting, not ready
4      Emergency  11-02-24  01:22:50    Because of task deadloop occurs, the entity of LPU8 is resetting, not ready,
Handling Process
Null
Root Cause
After check the reset log file,because of  the IIC chip(chip number ADT7481) faulty,the CPU will use this chip to get board temperature information,during to this IIC chip faulty the CPU hang,then the LPU reset again and again.
below the logs showing the IIC chip number.
Corresponding task call stack info:
 -------------------------------------------------------------
 Task Name         = BMON
 Task VOS ID       = 115
 Task OSAL ID      = 0x1561210
 Task PC           = 0x40b548
 Task SP           = 0x1ac0e90
 Call stack        : 0x0040b548
      (sysMsDelay + 0x80)
  <-- 0x0040b4c8(sysMsDelay + 0x0) 
  <-- 0x005b7900(LPUF_I2C_ADT7481_Read + 0x29c)
  <-- 0x005b7bb0(LPUF_I2C_ADT7481_Get + 0xe4) 
  <-- 0x005b881c(LPUF_I2C_ADT7481_GetAll + 0x128)
  <-- 0x0057281c(bspScCommon8 + 0x38) 
  <-- 0x006c5880(syscallDispatch + 0x368)
  <-- 0x0060c150(syscallTrapHandle + 0x110) 
  <-- 0xd5561de4(rtp_bspScCommon8 + 0x18)
  <-- 0xd56eb3c8(LPUF_I2C_ADT7481_GetAll + 0x3c) 
  <-- 0xd555b47c(BDRV_Lpuf_GetCpuMonTem + 0x98)
  <-- 0xd5a982b0(HSL_LPU_GetCpuMonTemp + 0x54)
Suggestions
we decide this issue for LPU hardware issue.suggestion the customer replace the LPU. 

END