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Politics : Formerly About Advanced Micro Devices
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To: Ali Chen who wrote (40572)11/1/1998 8:22:00 PM
From: Tenchusatsu  Read Replies (2) of 1573716
 
<You and your buddies at Intel seem to have missed one more inflection point in modern technology: the time for old "busses" is over! By applying the whole power of your deduction, you may find out that the EV6 P2P is NOT a BUS, it is POINT-TO-POINT connection, and EXTREMELY FAST, without any tracing/termination/anti-reflection tweaks (where the major system production cost sits).>

Ali, tell that to Sequent. They seem to think that putting twenty processors on one bus is fine.

Perhaps you can tell us how server OEM's are going to create 4-way K7 chipsets without adding a crossbar, thus adding additional latency. Do you think that one north bridge chip will support four P2P connections? Perhaps you can have two north bridges each supporting two P2P connections, but once again, cache coherency is going to require additional latency cycles. Or maybe the 4-way K7 will go for a non-uniform memory architecture.

Ali, many engineers would disagree with your statement that the multiprocessor bus is old-fashioned compared to multiple P2P connections. It's just two different styles of designing server platforms. There are advantages and disadvantages to both.

By the way, Intel decided that Merced should go onto an SMP bus. According to you, they must be out of their minds to put new IA-64 technology on an "old-fashioned" bus.

Tenchusatsu
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