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Whoah. Downvoters, care to explain your logic here? Or do you think that 30+ stage pipeline in actually optimal for improving ILP?
by MichaelSalib 14y ago
Whoah. Downvoters, care to explain your logic here? Or do you think that 30+ stage pipeline in actually optimal for improving ILP?
- rz2k 14y agoI didn't downvote but: >they can never come down because that would decrease clock rates and lots of people have been trained into believing that clock speeds indicate performance is a bold statement that is not likely to be true. Casual metrics of performance change, and I doubt there are many people confused as to whether they choose a 4GHz Pentium 4 over a lower clocked Core 2, much less something like a Xeon E5.
- wmf 14y agoPerhaps people are not confused simply because those older processors are no longer sold. AMD certainly felt the need to fudge their frequency back in the K7 days (although megahurtz marketing may be specific to the desktop market).
- wmf 14y agoI didn't downvote you, but there is research from Intel, IBM, and others showing that very deep pipelines (they disagree on the exact numbers) are indeed optimal if power isn't a concern (which it wasn't until ca. 2003). http://web.archive.org/web/20021211202017/http://systems.cs.colorado.edu/ISCA2002/ http://web.archive.org/web/20021211202017/http://systems.cs....