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by Const-me
1810 days ago
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> “dynamic frequency scaling”, a feature that allows software to instruct the CPU to run at a lower speed, commonly known as “CPU throttling” AFAIK that's not how it works in modern CPUs. Dynamic frequency scaling is a black box implemented in hardware. Software, and even OS kernels, have very little input over that. They can't subscribe for status updates. Even just getting the current frequency seems impossible, only indirectly by comparing RDTSC output (absolute time unscaled) with performance counters. |
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