The WriteEvictFull CHI opcode definition states the following
"Write-back of UniqueClean data to the next-level cache."..
If the line is already in UniqueClean state, why is a write-back of that line required?
This can improve performance for other RNs wishing to access the same data. The latency to the next level cache may be lower than snooping a cache within the RN.
Got it. Thanks.