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Politics : Formerly About Advanced Micro Devices

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To: Jim McMannis who wrote (73760)	10/3/1999 1:27:00 PM
From: Steve Porter	Read Replies (1) of 1572717

Jim, Athlon has 3 load store units, and trust me (I know from hacking code for these thing), it's no slouch in the 'moving memory around' category. If you stay inside that wonderfully large 128K L1 cache, the 'memory' performance of that thing is stunning.. Add to that the huge sceduler in Athlon, and deep pipelines and the 3 FPU(mmx/3dnow) units and you can do an awful lot of work in a very small amount of time. My only gripe with Athlon is that load/store operations have a latency of 3 now (like the PII/PIII). This is a bit annoying, as it gets harder and ahrder to hide the latency of those (especially when you can have 3 instructions issued a clock.. you someone how have to find another 8 instructions before using the memory, or you 'waste' the cpu)... not easy at to do at all.. At least with only 2 pipe to fill on the PII you only had to find 5 insturctions to 'fill' the blank spots.. Regards, Steve

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