about padding

[ckcfcc]

Can you explain the meaning of padding, thank you

[textnode]

Hi ckcfcc,

Yes, the padding is to ensure that each member is on a separate cache line (lastCommittedIndex does not share a cache line with nextFreeIndex, nextFreeIndex does not share a cache line with readerIndex....and so on...) to prevent false sharing and hence improve performance.

https://en.wikipedia.org/wiki/False_sharing

Best Regards,
Darren