On Thu, 27 Oct 2016, Ville Syrjälä wrote: > On Thu, Oct 27, 2016 at 08:48:57PM +0200, Thomas Gleixner wrote: > > What that old patch did, was: > > > > 1) Make sure that the broadcast device is actually armed at resume. > > > > That might cause the HPET to resume proper. > > > > 2) Force a max. 3 seconds rearm when the targeted expiry time is > than 10 > > seconds > > > > That might make sure that lower C-States are never entered. > > Doh. I lost the other hunk somewhere. Let's try that again... And indeed > with the other hunk in tow the machine would appear to resume properly. So it would be interesting whether that hunk in resume_broadcast() is sufficient. > > What's the lowest C-State with acpi-idle and what's the lowest one with > > intel_idle? > > acpi_idle > /sys/devices/system/cpu/cpu0/cpuidle/state3/desc:ACPI FFH INTEL MWAIT 0x30 > /sys/devices/system/cpu/cpu0/cpuidle/state3/disable:0 > /sys/devices/system/cpu/cpu0/cpuidle/state3/latency:100 > /sys/devices/system/cpu/cpu0/cpuidle/state3/name:C3 > /sys/devices/system/cpu/cpu0/cpuidle/state3/power:0 > /sys/devices/system/cpu/cpu0/cpuidle/state3/residency:200 > /sys/devices/system/cpu/cpu0/cpuidle/state3/time:5677316 > /sys/devices/system/cpu/cpu0/cpuidle/state3/usage:5920 > > intel_idle: > /sys/devices/system/cpu/cpu0/cpuidle/state3/desc:MWAIT 0x30 > /sys/devices/system/cpu/cpu0/cpuidle/state3/disable:0 > /sys/devices/system/cpu/cpu0/cpuidle/state3/latency:100 > /sys/devices/system/cpu/cpu0/cpuidle/state3/name:C4-ATM > /sys/devices/system/cpu/cpu0/cpuidle/state3/power:0 > /sys/devices/system/cpu/cpu0/cpuidle/state3/residency:400 > /sys/devices/system/cpu/cpu0/cpuidle/state3/time:7146705 > /sys/devices/system/cpu/cpu0/cpuidle/state3/usage:6826 Does the machine work, when you limit intel idle to C3, which would then match acpi idle ? Thanks, tglx
