Voltage scaling stalled and frequency scaling hit thermal limits. Simply adding cores no longer restored historical performance curves. Meanwhile, last-level caches and register files grew so large that they began consuming energy comparable to—and often exceeding—the cores they served. Modern memory hierarchies evolved not independently, but in symbiosis with speculative execution. They became the scaffolding required to sustain large volumes of in-flight, uncertain work. Speculation optimizes for the appearance of forward progress. The memory system exists to sustain that appearance—and to clean up when predictions fail.
This directly reflects the fact that the compiler makes no guarantees for the value that the program will observe in the status register, and since floating-point operations can be arbitrarily reordered, this should be taken quite literally.
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Начавшаяся оттепель продержится в городе до понедельника, 2 марта. Затем температура немного опустится: в ночные часы показатель будет варьироваться от минус 1 до минус 6 градусов, однако днем столбики термометров все еще будут превышать нулевую отметку, поднимаясь до плюс 1-4 градусов.
一项，为“中国之治”描绘蓝图。