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Problem IT39748
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Status: Closed |
WHEN CPU SUPPORTS AVX2 A RARE TRAP IN PACKEDBANKSIMD IS POSSIBLE
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| product: |
DB2 FOR LUW / DB2FORLUW / B50 - DB2 |
| Problem description: |
If CPU supports AVX2 a trap in PackedBankSIMD is possible with
the following stack:
PackedBankSIMD::evalSIMD
PackedBankSIMD::evaluateRangeConjunctionOnSingleCol
PackedBank::evaluateRangeConjunctionOnSingleCol
PackedBank::evalEQ
ColumnGroupAccessor::getTSNsForRegion
LoadColValueEvaluator::processTSNRangeOnPage |
| Problem Summary: |
****************************************************************
* USERS AFFECTED: *
* BLU users on CPU having AVX2 *
****************************************************************
* PROBLEM DESCRIPTION: *
* See Error Description *
****************************************************************
* RECOMMENDATION: *
* Upgrade to Db2 v11.5.7.1 *
**************************************************************** |
| Local Fix: |
db2set DB2_CPU_FEATURE_DISABLE=AVX2 |
| Solution |
|
| Workaround |
****************************************************************
* USERS AFFECTED: *
* BLU users on CPU having AVX2 *
****************************************************************
* PROBLEM DESCRIPTION: *
* See Error Description *
****************************************************************
* RECOMMENDATION: *
* Upgrade to Db2 v11.5.7.1 *
**************************************************************** |
| Comment |
Fix will be contained in Db2 v11.5.7.1 |
| Timestamps |
Date - problem reported :
Date - problem closed :
Date - last modified :
| 25.01.2022
31.01.2022
31.01.2022 |
| Problem solved at the following versions (IBM BugInfos) |
|
| Problem solved according to the fixlist(s) of the following version(s) |
