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T3-1 or Netra T3-1 system board with misprogrammed thresholds (Doc ID 2020283.1)

Last updated on MAY 29, 2019

Applies to:

SPARC T3-1 - Version All Versions and later
Netra T3-1 - Version All Versions and later
Information in this document applies to any platform.

Symptoms

prtdiag reports a much lower processor speed than typical:

System Configuration:  Oracle Corporation  sun4v Netra SPARC T3-1
Memory size: 130560 Megabytes

================================ Virtual CPUs ================================


CPU ID Frequency Implementation         Status
------ --------- ---------------------- -------
0      749 MHz   SPARC-T3               on-line  
1      749 MHz   SPARC-T3               on-line  
2      749 MHz   SPARC-T3               on-line  
...

Also the V_VCORE sensor thresholds contain the values of a T5-x:

   MB/C0/V_VCORE    | 1.050      | Volts      | ok    | 0.725     | 0.775     | 0.825     | 1.325     | 1.375     | 1.400 


The proper output should appear like:


System Configuration:  Sun Microsystems  sun4v SPARC T3-1
Memory size: 15872 Megabytes

================================ Virtual CPUs ================================


CPU ID Frequency Implementation         Status
------ --------- ---------------------- -------
0      1649 MHz  SPARC-T3               on-line  
1      1649 MHz  SPARC-T3               on-line  
2      1649 MHz  SPARC-T3               on-line  

   MB/C0/V_VCORE    | 1.025      | Volts      | ok    | 0.925     | 0.950     | 1.000     | 1.075     | 1.100     | 1.125   

Cause

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