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| • | How
does a CPU find a valid copy of a |
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| specified
address’s data? |
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| 1. | Translate
virtual address to physical |
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| 2. | Physical
address includes bits which identify |
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| “home”
node |
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| 3. | Home
node is where DRAM for this address |
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| resides |
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| 4. | But
current valid copy may not be there – may be |
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| in
another CPU’s cache |
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| 5. | Home
node holds pointer to sharing chain, so |
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| always
knows where valid copy can be found |
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