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Politics : Formerly About Advanced Micro Devices -- Ignore unavailable to you. Want to Upgrade?

To: Scumbria who wrote (44325)	12/29/1998 8:45:00 PM
From: Tenchusatsu	Read Replies (1) \| Respond to of 1584437

<K7 may well achieve SPEC scores close to those of 21264 and Merced. In a Von Neumann architecture, instructions tend to have a lot of dependencies on previous instructions. Even if you had 20 execution units available, only about two of them are of any value at any given time.> Based on this, what will make the K7 so much faster than the P6 SPEC-wise? And if P6 is already far behind the 21264 in the SPEC benchmarks, and given that the K7 is more like a P6-plus than a seventh-generation architecture, then why would you think that the K7 can even come close to the 21264? Tenchusatsu

To: Scumbria who wrote (44325)	12/29/1998 9:06:00 PM
From: Steve Porter	Read Replies (1) \| Respond to of 1584437

Scumbria: Spec is a synthetic benchmark which is designed to run out of the L1 cache. System level benchmarks, Scumbria, please check your data.. the working data set for SpecINT is huge and was designed NOT to fit into any L1, L2 or L3 cache.. this change happened when the 21064 came out with (at the time) huge caches and multiple levels... Intel and other CPU vendors (IBM, MOT, etc.) freaked and they changed it so that the data set for SPEC is MANY MANY MEGS.. Regards, Steve