Cerb
Elite Member
- Aug 26, 2000
- 17,484
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Some of the teh was re-implemented, but this time well, on a core that could take good advantage of it. On Netburst, HT on v. off was a serious decision, even for throughput applications! Starting with Nehalem, on was a good setting, unless you had reason to turn it off, and the niches that are better with it off keep shrinking, with each generation. The trace cache is another re-implemented feature.Actually, I think Netburst was sort of a tangent. Sandy and Ivy can trace their roots back to the Pentium M/Pentium 3 which was really based on the Pentium Pro. I think.I'm sure some of the Netburst tech was recycled, but I believe the bulk of the tech is ultimately based on the Pentium M/2/3.
It's not that SMT was bad, FI, but that there wasn't nearly enough cache to go around for multiple threads, and that in real-world applications, the other shared resources weren't always good at automatically balancing themselves, either.
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