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by ishitatsuyuki
2081 days ago
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Linux has implemented hrtimer [1] a while ago and it can easily achieve sub-ms precision. You can just try some benchmark with nanosleep() on your system. It works in a similar way to the PIT you described, although I don't think it tries to offset the delay from interrupts. What I want to say is that we already have precise timers usable on modern hardware; as for why Windows doesn't use that properly, I have no idea, but I can guess that's some technical debt in the scheduler. [1] https://www.kernel.org/doc/ols/2006/ols2006v1-pages-333-346.... |
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