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MESI
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Protocol
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Modified (private,!=Memory)
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eXclusive (private,=Memory)
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Shared (shared,=Memory)
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Invalid
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Illinois
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Protocol
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Private
Dirty
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Private
Clean
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Shared
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Invalid
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Basic
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Protocol
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Exclusive
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Shared
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Invalid
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Berkeley
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Protocol
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Owned
Exclusive
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Owned
Shared
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Shared
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Invalid
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Owner can update via bus
invalidate operation
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Owner must write
back when replaced in cache
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If read sourced
from memory, then Private Clean
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if read sourced from other
cache, then Shared
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Can write in
cache if held private clean or dirty
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Advanced Computer Architecture Chapter 7.29
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