On Mon, Aug 19, 2013 at 11:16:54AM +0200, Stephane Eranian wrote: > On Thu, Aug 15, 2013 at 3:53 PM, Andi Kleen <[email protected]> wrote: > >> > >> I think its a NOP; this is the global ctrl register but > >> intel_pmu_disable_event() writes PERFEVTSELx.EN = 0, so even if you > >> enable it in the global mask, the event should still be disabled. > > > > Yes the hardware ANDs the various enable bits in the different > > registers. > > > Andi is correct. There is a logical AND between GLOBAL_CTRL and > the individual PERFEVTCTL.EN bits. If the EN bit is zero, then the > counter does not count. That also applies to fixed counters.
right, peter mentioned I could have seen already queded NMI comming in for that event.. jirka -- 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/
