> I think that if interlock-free software scheduled CPUs allowed us to reach 20GHz clock speeds where complex superscalar machines were stuck at 3GHz we'd all b

> I think that if interlock-free software scheduled CPUs allowed us to reach 20GHz clock speeds where complex superscalar machines were stuck at 3GHz we'd all be jumping ship - but they're not Additionally, realize that clock speeds are not a relevant performance metric. Maybe, perhaps, it's possible for a software scheduled CPU to run at 2*n GHz, but that's not interesting, if it's slower in real-world workloads than todays tech at n GHz. And for breadth-deployment in data centers we're mostly looking at throughput per Watt. CPUs with high clock speeds don't do well in that area because semiconductor physics.