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Politics : Formerly About Advanced Micro Devices

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To: Joe NYC who wrote (114299)	6/5/2000 9:11:00 AM
From: Scumbria	Read Replies (1) of 1575182

Joe, I think this scenario rare. You must have a fully utilized system with threads being independent. Under normal circumstances, CPUs are lightly loaded, and what you care about is that in the short periods, when the CPUs are not idle and are actually doing something, you want to get the result ASAP. Benchmarks typically load the system quite heavily, otherwise they would be useless as benchmarks. Applications that don't require a lot of computational power require neither a 2GHz CPU, or dual 1 GHz CPU's. One 2 GHz system will exhibit much lower latency than a system with two 1 GHz CPUs. Quite the contrary. A dual CPU system has twice as much cache than a single CPU system, and thus accesses DRAM much less frequently. In addition, the caches in the dual processor system are not thrashing, because the different threads are not interfering with each other. The problem of 1CPU 2GHz vs. 2CPU 1GHz requires some different analysis from the traditional 1CPU vs. 2CPU comparison at the same clock rate. 2CPU 1GHz is going to do much better! I believe that Sledgehammer will be a killer product for these reasons. Scumbria

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