> Well, if that's all you want them to use RDPMC 0 for, why not just make > PMCs programmable from userspace? First we need to have a cycle counter PMC anyways for the NMI watchdog. So it can as well be used for other purposes. And using virtual performance counters adds a large cost the context switch for changing the MSRs around. An always running counter avoids this problem. -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/
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