Let the user set the chunk-size for CPU limit enforcement #84
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With a large chunk-size, the cpulimit command adds very little overhead, but the CPU usage of the limited process may vary wildly from moment to moment. With a small chunk-size, the cpulimit command can add significant overhead, but the CPU usage of the limited process stays very close to the requested value.
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I wanted to run an old video-game that used a busy-wait for proper timing, but I didn't want to spend gigahertz on a process designed for megahertz. I found your cpulimit tool, and it was almost what I wanted: it slowed things down nicely, but the default chunk-size of 100ms was too much. I could visibly see the game run a little bit, then pause, then run a little bit and pause again.
With this patch, I'm running my game with a chunk-size of 16ms, or about one frame at my monitor's 60Hz refresh rate, and it works beautifully.