禁用 Linux 调度程序来测量特定机器代码指令的功耗
我怎样才能在Linux中运行一个程序，该程序运行大约10000次移位指令而不被调度程序中断？我想这样做是为了检查本机移位指令的功耗。
how can i run a programm in linux thats runs about 10000 times a shift instruction without it being interrupted by the scheduler? I want to do so in order to examine power consumption of the native shift instruction.
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除非需要运行其他任务，否则调度程序不会中断您的任务。不过，硬件中断（例如定时器）会发生，并且会中断一段时间，但通常不会很长时间。
然而，我真的不确定衡量特定指令的能力有何相关性；现代CPU实际上并不是这样工作的——它们不会一次只运行一条指令，并且没有“真正的”程序只使用单一类型的指令。
我认为硬件中断的影响不会很大，特别是如果您正在运行“无滴答”内核（通常在较新的系统上默认启用）。
The scheduler is not going to interrupt your task unless something else needs to run. Hardware interrupts (e.g. timers) will happen though, and they interrupt it for a while, but not very long normally.
However, I'm really not sure how measuring the power of a particular instruction is relevant; modern CPUs don't really work like that - they don't ever run just one instruction at once, and no "real" program uses just a single type of instruction.
I don't think the impact of hardware interrupts is going to be very much, especially if you're running a "tickless" kernel (which is usually enabled by default on newer systems).