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Politics : Formerly About Advanced Micro Devices
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To: Paul Engel who wrote (37491)9/28/1998 2:00:00 PM
From: Scumbria  Read Replies (1) of 1572159
 
Why would a single processor snoop its own bus - unless it wasn't aware of what it was doing ?

Paul,

MP busses have extra latency to allow for the possibility of snoops. The must provide the ability to invalidate data after a remote snoop hit, even if there is no such activity occurring.

If you want to build a minimum latency single processor bus, you will not implement an MP protocol. A good example of this is the Cyrix MediaGX, which has extremely low dram latencies.

Scumbria

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