We should move from long to byte padding for False Sharing protection #12312
Description
We should use byte fields for padding to avoid upcoming false sharing problem in JDK 15+ where field ordering has changed
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We should use byte fields for padding to avoid upcoming false sharing problem in JDK 15+ where field ordering has changed
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normanmaurer commentedon Apr 19, 2022
@franz1981 want to give it a spin ?
chrisvest commentedon Apr 19, 2022
In the
mainbranch we've currently removed the padding fromInternalThreadLocalMap. There was a TODO that it hadn't been tested if it actually helped or not, so if we add padding back then I think we should also be able to show that it's an improvement.