Advanced Computer Architecture Chapter 7.21
Implementing
Strong Consistency: update…
Problems with update
1.What about if the cache line is several words long?
Each update to each word in the line leads
to a broadcast
2.What about old data which other processors are no longer interested in?
We’ll keep broadcasting updates
indefinitely…
Do we really have to broadcast every store?
It would be nice to know that we have
exclusive access to the cacheline
so we don’t have to broadcast
updates…