* Re: 4.8.1 regression with cpufreq governors
2016-10-18 21:10 ` 4.8.1 regression with cpufreq governors Rafael J. Wysocki
@ 2016-10-19 14:06 ` Viresh Kumar
2016-10-19 20:06 ` Tim Walberg
1 sibling, 0 replies; 4+ messages in thread
From: Viresh Kumar @ 2016-10-19 14:06 UTC (permalink / raw)
To: Rafael J. Wysocki; +Cc: Tim Walberg, linux-kernel, Linux PM list
On 18-10-16, 23:10, Rafael J. Wysocki wrote:
> On Monday, October 17, 2016 07:46:06 PM Tim Walberg wrote:
> > May or may not be related to similar reports, but here's what I've just observed
> > on my system. Built a stock kernel from tags/v4.8.1, relevant cpufreq bits:
> >
> > CONFIG_ACPI_CPU_FREQ_PSS=y
> > CONFIG_CPU_FREQ=y
> > CONFIG_CPU_FREQ_GOV_ATTR_SET=y
> > CONFIG_CPU_FREQ_GOV_COMMON=y
> > CONFIG_CPU_FREQ_STAT=y
> > CONFIG_CPU_FREQ_STAT_DETAILS=y
> > # CONFIG_CPU_FREQ_DEFAULT_GOV_PERFORMANCE is not set
> > # CONFIG_CPU_FREQ_DEFAULT_GOV_POWERSAVE is not set
> > # CONFIG_CPU_FREQ_DEFAULT_GOV_USERSPACE is not set
> > # CONFIG_CPU_FREQ_DEFAULT_GOV_ONDEMAND is not set
> > CONFIG_CPU_FREQ_DEFAULT_GOV_CONSERVATIVE=y
> > # CONFIG_CPU_FREQ_DEFAULT_GOV_SCHEDUTIL is not set
> > CONFIG_CPU_FREQ_GOV_PERFORMANCE=y
> > CONFIG_CPU_FREQ_GOV_POWERSAVE=m
> > CONFIG_CPU_FREQ_GOV_USERSPACE=m
> > CONFIG_CPU_FREQ_GOV_ONDEMAND=m
> > CONFIG_CPU_FREQ_GOV_CONSERVATIVE=y
> > CONFIG_CPU_FREQ_GOV_SCHEDUTIL=m
> > # CONFIG_X86_PCC_CPUFREQ is not set
> > CONFIG_X86_ACPI_CPUFREQ=m
> > CONFIG_X86_ACPI_CPUFREQ_CPB=y
> >
> >
> > Conservative is set as default governer, yet when boot completes, all CPUs are
> > pegged at the highest frequency. Changing governor to powersave knocks them all
> > down to the lowest available frequency. Putting them back on conservative (or
> > ondemand) results in no change in frequency, despite generating load. Switching
> > to performance of course kicks them back up to high frequency. Basically, the
> > governors don't seem to be ... governing.
>
> The "convervative" governor issue seems to be the one fixed recently
> (http://git.kernel.org/cgit/linux/kernel/git/rafael/linux-pm.git/commit/?h=pm-cpufreq&id=abb6627910a1e783c8e034b35b7c80e5e7f98f41).
>
> I'm not sure why "ondemand" behaves incorrectly for you though.
@Tim: Can you please try this as well:
https://marc.info/?l=linux-kernel&m=147624218132250&w=2
Subject: [PATCH V2] cpufreq: skip invalid entries when searching the frequency
--
viresh
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: 4.8.1 regression with cpufreq governors
2016-10-18 21:10 ` 4.8.1 regression with cpufreq governors Rafael J. Wysocki
2016-10-19 14:06 ` Viresh Kumar
@ 2016-10-19 20:06 ` Tim Walberg
2016-10-20 3:29 ` Viresh Kumar
1 sibling, 1 reply; 4+ messages in thread
From: Tim Walberg @ 2016-10-19 20:06 UTC (permalink / raw)
To: Rafael J. Wysocki; +Cc: Tim Walberg, linux-kernel, Linux PM list, Viresh Kumar
This indeed turned out to be the fix.
On 10/18/2016 23:10 +0200, Rafael J. Wysocki wrote:
>> On Monday, October 17, 2016 07:46:06 PM Tim Walberg wrote:
>> > May or may not be related to similar reports, but here's what I've just observed
>> > on my system. Built a stock kernel from tags/v4.8.1, relevant cpufreq bits:
>> >
>> > CONFIG_ACPI_CPU_FREQ_PSS=y
>> > CONFIG_CPU_FREQ=y
>> > CONFIG_CPU_FREQ_GOV_ATTR_SET=y
>> > CONFIG_CPU_FREQ_GOV_COMMON=y
>> > CONFIG_CPU_FREQ_STAT=y
>> > CONFIG_CPU_FREQ_STAT_DETAILS=y
>> > # CONFIG_CPU_FREQ_DEFAULT_GOV_PERFORMANCE is not set
>> > # CONFIG_CPU_FREQ_DEFAULT_GOV_POWERSAVE is not set
>> > # CONFIG_CPU_FREQ_DEFAULT_GOV_USERSPACE is not set
>> > # CONFIG_CPU_FREQ_DEFAULT_GOV_ONDEMAND is not set
>> > CONFIG_CPU_FREQ_DEFAULT_GOV_CONSERVATIVE=y
>> > # CONFIG_CPU_FREQ_DEFAULT_GOV_SCHEDUTIL is not set
>> > CONFIG_CPU_FREQ_GOV_PERFORMANCE=y
>> > CONFIG_CPU_FREQ_GOV_POWERSAVE=m
>> > CONFIG_CPU_FREQ_GOV_USERSPACE=m
>> > CONFIG_CPU_FREQ_GOV_ONDEMAND=m
>> > CONFIG_CPU_FREQ_GOV_CONSERVATIVE=y
>> > CONFIG_CPU_FREQ_GOV_SCHEDUTIL=m
>> > # CONFIG_X86_PCC_CPUFREQ is not set
>> > CONFIG_X86_ACPI_CPUFREQ=m
>> > CONFIG_X86_ACPI_CPUFREQ_CPB=y
>> >
>> >
>> > Conservative is set as default governer, yet when boot completes, all CPUs are
>> > pegged at the highest frequency. Changing governor to powersave knocks them all
>> > down to the lowest available frequency. Putting them back on conservative (or
>> > ondemand) results in no change in frequency, despite generating load. Switching
>> > to performance of course kicks them back up to high frequency. Basically, the
>> > governors don't seem to be ... governing.
>>
>> The "convervative" governor issue seems to be the one fixed recently
>> (http://git.kernel.org/cgit/linux/kernel/git/rafael/linux-pm.git/commit/?h=pm-cpufreq&id=abb6627910a1e783c8e034b35b7c80e5e7f98f41).
>>
>> I'm not sure why "ondemand" behaves incorrectly for you though.
>>
>> Thanks,
>> Rafael
End of included message
--
twalberg@gmail.com, twalberg@comcast.net
^ permalink raw reply [flat|nested] 4+ messages in thread