The shared bus here is atomic in terms of transaction. That means only participants of a single transaction can use bus during the transaction. Here is An example from class. A cache asks for data in memory. With an atomic shared bus, this read transaction would occupy the bus until the data is sent back from the memory, even though there may be a period when the bus is actually idle. With a non-atomic bus, other transactions are allowed when the bus is idle.
The shared bus here is atomic in terms of transaction. That means only participants of a single transaction can use bus during the transaction. Here is An example from class. A cache asks for data in memory. With an atomic shared bus, this read transaction would occupy the bus until the data is sent back from the memory, even though there may be a period when the bus is actually idle. With a non-atomic bus, other transactions are allowed when the bus is idle.
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