On Wed, 13 Jul 2005, Benjamin LaHaise wrote: > That's one thing I truely dislike about the current timer code. If we > could program the RTC interrupt to come into the system as an NMI (iirc > oprofile already has code to do this), we could get much better TSC > interpolation since we would be sampling the TSC at a much smaller, less > variable offset, which can only be a good thing.
And we'd get a lot more crashes on broken systems that do not handle NMIs in the SMM -- this is the very reason the NMI watchdog is disabled these days by default. A whole lot of systems simply cannot handle NMIs happening randomly. Programming an I/O APIC to deliver the RTC interrupt (or any other that's edge-triggered) as an NMI is itself trivial (we can do this for the PIT for the NMI watchdog already). Maciej - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
