On Tue, Mar 21, 2017 at 05:02:25PM -0700, Nadav Amit wrote: > > > On Mar 21, 2017, at 3:51 PM, Gabriel Somlo <gsomlo@xxxxxxxxx> wrote: > > > > And I get the exact same results on the MacBookAir4,2 (which exhibits > > no freezing or extreme sluggishness when running OS X 10.7 smp with > > Michael's KVM MWAIT-in-L1 patch)... > > Sorry for my confusion. I didn’t read the entire thread and thought that > the problem is spurious wake-ups. > > Since that is not the case, I would just suggest two things that you can > freely ignore: > > 1. According to the SDM, when an interrupt is delivered, the interrupt > is only delivered on the following instruction, so you may consider > skipping the MWAIT first. > > 2. Perhaps the CPU changes for some reason GUEST_ACTIVITY_STATE (which > is not according to the SDM). > > That is it. No more BS from me. > > Nadav Intersting. I found this errata: A REP STOS/MOVS to a MONITOR/MWAIT Address Range May Prevent Triggering of the Monitoring Hardware Could the macbook CPU be affected? -- MST
