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Linus Torvalds wrote: > > It's not as good as a pure user-mode solution using tsc could be, but > we've seen the kinds of complexities that has with multi-CPU systems, and > they are so painful that I suspect the sysenter approach is a lot more > palatable even if it doesn't allow for the absolute best theoretical > numbers. > The complexity only applies to nonsynchronized TSCs though, I would assume. I believe x86-64 uses a vsyscall using the TSC when it can provide synchronized TSCs, and if it can't it puts a normal system call inside the vsyscall in question. -hpa - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ | ||||||||||||
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