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What are the L2C single bit errors showing in logs?

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TitleWhat are the L2C single bit errors showing in logs?
Question
What are the L2C single bit errors showing in logs?
<Erro:Kern.Error> ERROR CVMX_L2C_ERR_VBF: 0x102c000000000000
<Erro:Kern.Error> ERROR L2C_TADX_INT(0)[VBFSBE]: VBF Single-Bit Error</span>


 
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Answer
  • The L2 CPU Cache memory is ECC Protected memory
  • When a stream of data arrives with a single bit altered (i.e. 0001011 arriving as 1001011) a single bit error is registered and logged
<Erro:Kern.Error> ERROR CVMX_L2C_ERR_VBF: 0x102c000000000000
<Erro:Kern.Error> ERROR L2C_TADX_INT(0)[VBFSBE]: VBF Single-Bit Error
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