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Politics : Formerly About Advanced Micro Devices
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To: Steve Porter who wrote (66353)7/21/1999 5:49:00 PM
From: kapkan4u  Read Replies (1) of 1576317
 
<It's not alignment.. it's the fashion in which the FFT walks the memory.. it starts in the first iterations a 4 complex number offsets (32 byte offsets) and double from there. This reduces cache efficiency to almost nothing.>

This is what prefetch instructions were invented for.

Kap.

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