Advanced Micro Devices Inc (AMD)

[dacaw]

"Absolutely false."

Actually the data you present shows him to be absolutely right.

Though the graph you present doesn't show any set-associative > 8-way it can be seen that the fully associative miss-ratio is essentially flat from 64K to infinite cache and the 8-way is flat from 128K onwards. (to my eye). 16-way and 1023-way must fall between the direct-mapped and the 8-way.

It seems reasonable that the posed 1023-way line would be very, very close to the fully associative case, if so then there is no advantage to going above 64K and the miss ratio would be the same in a 512K 16-way cache as a 64K 1023-way.

I've never heard of a 1023-way, is this a typo for a 1024 or is there a subtlety when one gets to high-associativity caches?