Advanced Micro Devices - Moderated (AMD) Message Board

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Technology Stocks : Advanced Micro Devices - Moderated (AMD)

AMD 215.32

-0.2%

Dec 30 3:59 PM EST

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To: Scot who wrote (6848)	8/28/2000 10:21:47 PM
From: John Evans	Read Replies (1) of 275872

RE:"Some software applications cause circuit on 1.13 GHz Pentiums to fail" gcc is a good benchmark because it has a lot of potentially mispredicted branches and non-linear (all over the place) memory accesses. In other words, lots of stalls, flushes, bubbles, etc. In order to perform well, a processor must have a large L1 and L2 cache along with small penalties (cache miss, branch). I've been reading reports on instruction-level parallelism -- academic studies which try to determine how efficient superscalar and superpipelined designs will be on typical code. Invariably compilers are one of the hardest applications to execute efficiently. Among the worst is the unix program yacc ("yet another compiler compiler"). This is exactly the kind of code that will give Willy headaches. Take the press releases about "advanced branch prediction" with a grain of salt. Some branches are impossible to predict. gcc also represents the kind of code that is run on workstations and severs. Unless they can ramp the P4 quickly, Intel will lose this market to AMD.

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