> I suspect latency may become an issue when more than one link is
> involved and there can be contention.
According to the AMD talk at OLS, worst case on a 4-way is better than current
best-case on a uniprocessor athlon.
> Beyond 8-way, you need glue logic (hypertransport switches?) and
> latency seems bound to become an issue.
Nope. Just extend the ladder. Each cpu talks to three other entities, either
cpu or I/O. Can be extended arbitrarily until latencies are too high.
Chris
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