IT28412: DB2 FAILS ON SOME AVX-512 CAPABLE CPUS

APAR status

• Closed as fixed if next.

Error description

• Db2 V11.1.4.4 utilizes the following Intel AVX-512 instructions
  extensions:
  AVX512DP,AVX512F,AVX512BW,AVX512CD,AVX512VL
  Not all Intel AVX-512 capable CPUs support all these extensions.
  Db2 currently only checks for AVX512F and AVX512CD.
  
  On Linux the supported instruction extensions can be verified
  using
  cat /proc/cpuinfo | grep flags
  

Local fix

• db2set DB2_CPU_FEATURE_DISABLE=AVX512
  

Problem summary

• ****************************************************************
  * USERS AFFECTED:                                              *
  * Db2 V11.1.4.4 users using certain Intel AVX512 CPUs.         *
  ****************************************************************
  * PROBLEM DESCRIPTION:                                         *
  * See Error Description                                        *
  ****************************************************************
  * RECOMMENDATION:                                              *
  * Upgrade to next release.                                     *
  ****************************************************************
  

Problem conclusion

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

Applicable component levels

• RB10 PSN

     UP

• RB10 PSY

     UP