MWAIT C-state hints
Hi all, I have pushed some changes to enable idle wait's mwait C-state hint auto tuning. It will allow you enter much deeper C-state, even when ACPI does not map its deepest C-state to the deepest cpu specific C-state (mwait hint). e.g. on my laptop, w/o power cable, ACPI C3 is mapped to cpu specific C4 sub-state 0, while the deepest supported cpu specific C-state is C4 sub-state 1; w/ power cable, there is no ACPI C3 at all and ACPI C2 is mapped to cpu specific C3 sub-state 0. You could set following tunable to enable the auto tuning: sysctl machdep.mwait.cpu_idle_hlt=1 sysctl machdep.mwait.CX.idle=AUTODEEP You could check how much time cpu specific C-states are entered by: sysctl machdep.mwait.C[0-7].entered Best Regards, sephe -- Tomorrow Will Never Die
Re: crash of unknown cause
On Wednesday, February 05, 2014 22:47:21 Sepherosa Ziehau wrote:
Hi,
Have you enabled RED or RIO in the altq configuration? I saw a
problem in the related code.
If that's a kernel config, no. I'm using the generic configuration. I do,
though, have this line in pf.conf:
altq on $int_if cbq bandwidth 984Kb queue { voip,dnsq,rest }
Pierre
--
Don't buy a French car in Holland. It may be a citroen.
Re: HEADSUP: New ACPI in master
:Hi everybody, : :I've upgraded ACPI in master on Monday. : :If you are seeing ACPI related error messages on the console or notice any :other weird issues that might be related, please make sure that your box :has the latest BIOS. It could be that a BIOS upgrade fixes the problems. : :Of course, feel free to ask here, too. :) : :Regards, :Sascha Haven't checked the BIOS yet but on the Acer c720 chromebook the new kernel's ACPI is complaining about the temperature every few seconds to the console: [ACPI Debug] String [0x14] CRITICAL TEMPERATURE [ACPI Debug] integer 0x000A02D0 It wasn't doing this before. -Matt Matthew Dillon dil...@backplane.com
