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Multi-processor communication - Page 2

post #11 of 12
Quote:
Originally Posted by MrJava View Post

QPI's a ring bus, is it not?

I don't believe so. It's always been referred to as a point to point interconnect in anything I've seen on the topic, and I can't find any mention of it being a ring bus (or even a bus, strictly speaking) anywhere.

Maybe you are confusing it with the internal ring bus in Sandy and later Intel CPUs (also in the big Nehalem EX dies, I believe) that connects the uncore, system agent, and all the cores to the L3 cache slices?
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post #12 of 12
Quote:
Originally Posted by Blameless View Post

I don't believe so. It's always been referred to as a point to point interconnect in anything I've seen on the topic, and I can't find any mention of it being a ring bus (or even a bus, strictly speaking) anywhere.

Maybe you are confusing it with the internal ring bus in Sandy and later Intel CPUs (also in the big Nehalem EX dies, I believe) that connects the uncore, system agent, and all the cores to the L3 cache slices?

I should've said ring topology. Yes I stand corrected, its point-to-point like HT.
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