> > So my point is that you cannot use the PMU to account for wall-clock time > when you > go in halted state. Yet, you could use the idle notifier to compensate for it > by > recording let's say TSC prior to entry and computing delta on exit. But then > I am > not sure what you would do with it given that other events may or may not have > counted during that time, making scaling harder to do.
I think correcting it with the TSC is fine. It might not be perfect, but it's good enough for most uses. Certainly much better than idle=poll > Once solution, implemented by Itanium Montecito processor, is to have a PMU > event > that counts cycles spent in halted state. This solution is incompatible with aggressive power management. -Andi - 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/
