> Another explanation is that because we ACK the NMI early, we leave the > door open to other interrupts, incl. NIC, and we are interrupting the > execution
PMI executes with interrupts off. > of the PMU IRQ handler, yet that detour is measured in the PMU handler > latency, causing more throttling than needed. Is that a plausible scenario > too? > And if so, I think we need to narrow the window for timing errors, by > acking late > on all processors and not just HSW. If you think there's a concrete problem please show an ftrace. -Andi -- [email protected] -- Speaking for myself only -- 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/
