CPU 设计是否正在触及（软性）速度极限？
1 分•作者: leecommamichael•5 天前
我并非身处硬件行业，对未来发展感到好奇。
我们长期以来一直被困在 3-5 GHz 的频率范围内。我认为我们是通过增加缓存、核心和专用指令来扩展性能。鉴于阿姆达尔定律等观察结果，PC 爱好者在新机器上获得的性能提升并不显著。我们已经拥有 8 个或更多逻辑核心很长一段时间了。
CPU 中晶体管的物理尺寸越来越难以缩小，成本也越来越高。我们正接近一个量子效应开始发挥作用的尺度，晶体管实际上存在一个“最小尺度”。那么，我们接下来能走向何方？这些变化（或缺乏变化）将对软件开发产生什么影响？
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I'm not in the hardware industry, and am curious what the future might hold.<p>We've been stuck in the 3-5 Ghz range for a long time. I think we're scaling by adding cache, cores, and specialized instructions. Due to observations like Amdahl's Law, PC hobbyists aren't seeing great returns on new machines. We've had 8+ logical cores for a long time now.<p>The physical size of gates in the CPU is getting very difficult and costly for companies to shrink further. We are approaching a scale where more quantum effects are at play, and there is actually a "minimum scale" for transistors. So where can we go from here? What will the effects of these changes (or lack thereof) be on software development?