Since 2002, the rate has slowed from a factor of 1.5 per year to a factor of only 1.03 per year because of the limits of power, available instruction-level parallelism, and long memory latency. |
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Product | AMD Opteron ×4 (Barcelona) | Intel Nehalem | IBM Power 6 | Sun Ultra SPARC T2 (Niagara 2) |
---|---|---|---|---|
Cores per chip | 4 | 4 | 2 | 8 |
Clock rate | 2.5 GHz | ∼ 2.5 GHz ? |
4.7 GHz | 1.4 GHz |
Microprocessor power | 120 W | ∼ 100 W ? |
∼ 100 W ? |
94 W |
Review: Uniprocessor Performance |
Available instruction-level parallelism High CPI (clock cycles per instruction) Limits of power Long memory latency |
Result: |
Francesca hit it out of the park with her speech today. It was fabulous. |