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On 01/06/15 13:41, Jung-uk Kim wrote:
> On 01/05/2015 22:57, Kevin Oberman wrote:
>> On Mon, Jan 5, 2015 at 4:56 PM, Sean Bruno
>> <sbr...@ignoranthack.me> wrote:
>>> -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512
>>> acpi_throttle0: <ACPI CPU Throttling> on cpu0 acpi_throttle0:
>>> P_CNT from P_BLK 0x1810 est0: <Enhanced SpeedStep Frequency
>>> Control> on cpu0 acpi_throttle1: <ACPI CPU Throttling> on cpu1
>>> acpi_throttle1: failed to attach P_CNT device_attach:
>>> acpi_throttle1 attach returned 6 est1: <Enhanced SpeedStep
>>> Frequency Control> on cpu1 acpi_throttle2: <ACPI CPU
>>> Throttling> on cpu2 acpi_throttle2: failed to attach P_CNT
>>> device_attach: acpi_throttle2 attach returned 6 est2: <Enhanced
>>> SpeedStep Frequency Control> on cpu2 acpi_throttle3: <ACPI CPU
>>> Throttling> on cpu3 acpi_throttle3: failed to attach P_CNT
>>> device_attach: acpi_throttle3 attach returned 6 est3: <Enhanced
>>> SpeedStep Frequency Control> on cpu3
>>> The call to acpi_bus_alloc_gas() in acpi_throttle.c seems to be
>>> failing to attach. What should I be poking at here?
>> Excellent! Throttling is counter-productive and always has been.
>> It's been at least 5 years since mav@ posted his excellent wiki
>> article on power management which demonstrated the futility of
>> throttling. More important, even if it was useful for power
>> management, it has long since been superseded by TCC. Intel
>> tried to make the purpose of TCC clear by the name: Thermal
>> Control Circuit. So it is ineffective for power management and
>> FreeBSD still tries to use it. Looks like the vendor broke ACPI
>> so throttling won't work. Or, maybe, Intel simply removed it as
>> unused legacy.
>> Don't worry. Be happy! Make sure that
>> hint.acpi_throttle.0.disabled=1 is set in /boot/loader.conf to
>> disable it. I'd strongly urge that you also disable P4TCC with
>> hint.p4tcc.0.disabled=1. It will trivially improve battery life
>> and will seriously compromise performance if powerd is enabled.
>> It can also cause hangs with elevated C-states on some systems.
> FYI, acpi_throttle and tcc have been disabled by default for a
> I guess Nathan forgot to MFC this commit?
> Jung-uk Kim
Well, I'm running -current. I don't know, for my case, that an MFC is
correct. Is it a bug that this stuff is appearing at all?
FreeBSD bruno 11.0-CURRENT FreeBSD 11.0-CURRENT #11 r276355M: Mon Jan
5 17:52:37 PST 2015 sbruno@bruno:/usr/obj/usr/src/sys/BRUNO amd64
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