IZ88919: INCORRECT SMT THREADS ON POWER7 HOST WITH ITM AIX

IBM Tivoli Monitoring: VIOS Premium Agent 6.2.2.1-TIV-ITM_VIOS_PREM-IF0002

APAR status

• Closed as program error.

Error description

• On Power7 host, Premium agent is reporting SMT threads 2 instead
  of 4.
  
  
  
  The amepat and lparstat commands show SMT Threads as 4.
  
  [testvioc][/opt/IBM/ITM/bin]>amepat | egrep -i threads
  
  SMT Threads                    : 4
  
  
  [testvioc][/opt/IBM/ITM/bin]>lparstat 2
  
  System configuration: type=Shared mode=Uncapped smt=4 lcpu=4
  mem=4096MB
  psize=8 ent=0.10
  
  But in the AIX Premium/AIX/System workspace..Under LPAR
  Attributes SMT
  Threads shows as 2.
  
  RECREATE INSTRUCTIONS:
  
  On a P7 host, run aix command smtctl to enable 4 smt threads.
  # smtctl -t 4
  Configured SMT threads can be viewed using smtctl
  # smtctl
  
  This system is SMT capable.
  This system supports up to 4 SMT threads per processor.
  SMT is currently enabled.
  SMT boot mode is not set.
  SMT threads are bound to the same physical processor.
  
  
  proc0 has 4 SMT threads.
  Bind processor 0 is bound with proc0
  Bind processor 1 is bound with proc0
  Bind processor 2 is bound with proc0
  Bind processor 3 is bound with proc0
  
  
  From the TEPS, using AIX Premium Agent, under "System" | "LPAR
  Attributes" panel, see the "SMT Threads" value, it will be
  showing 2 instead of 4.
  

Local fix

• To get the correct value of SMT threads, AIX command smtctl
  can be used.
  

Problem summary

• ****************************************************************
  *****
  * USERS AFFECTED: All users.
  ****************************************************************
  *****
  * PROBLEM DESCRIPTION: On IBM POWER7 systems, the agent is
  reporting
  * a value for SMT threads that does not match the output of
  * the "amepat" command.
  ****************************************************************
  *****
  * RECOMMENDATION: Apply 6.2.2.1-TIV-ITM_AIX_PREM-IF0001.
  ****************************************************************
  *****
  Interim Fix 6.2.2.1-TIV-ITM_AIX_PREM-IF0001 resolves the problem
  by
  reporting the correct value for SMT threads.
  

Problem conclusion

• The fix for this APAR is contained in the following maintenance
  package:
  
     | interim fix | 6.2.2.1-TIV-ITM_AIX_PREM-IF0001
  

Temporary fix

Comments

APAR Information

• APAR is sysrouted FROM one or more of the following:

• APAR is sysrouted TO one or more of the following:

Fix information

• Fixed component name

  ITM SE SYSP AIX

• Fixed component ID

  5724C04AP

Applicable component levels

• R622 PSY

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