linux-kernel - Re: v4.8-rc1: thinkpad x60: running at low frequency even during kernel build

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Date:   Sat, 5 Nov 2016 14:10:01 +0100
From:   Pavel Machek <pavel@....cz>
To:     Zhang Rui <rui.zhang@...el.com>
Cc:     "Pandruvada, Srinivas" <srinivas.pandruvada@...el.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "viresh.kumar@...aro.org" <viresh.kumar@...aro.org>,
        "linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>,
        "rjw@...ysocki.net" <rjw@...ysocki.net>,
        "linux-acpi@...r.kernel.org" <linux-acpi@...r.kernel.org>,
        ibm-acpi@....eng.br, ibm-acpi-devel@...ts.sourceforge.net,
        platform-driver-x86@...r.kernel.org
Subject: Re: v4.8-rc1: thinkpad x60: running at low frequency even during
 kernel build

Hi!

> > So we seem to have thermal or ACPI regression in v4.9-rc3.
> > 
> To me, there are two problems,
> the first one is a 4.9-rc regression that BIOS limit stops working,
> results in overheating because of high cpu frequency. I agree with
> Srinivas to check acpi_cpufreq driver code for this one.

Ok.

> the second problem is that thermal passive cooling can not prevent the
> system from overheating, when there is no BIOS limit. To debug this,
> you can enable thermal dynamic debug by
> echo 'module thermal_sys +fp' > /sys/kernel/debug/dynamic_debug/control

How is thermal passive cooling different from BIOS limit?

Is this related?

pavel@duo:/sys/class/thermal/cooling_device1$ grep -r . .
./cur_state:0
./power/runtime_active_kids:0
./power/runtime_suspended_time:0
grep: ./power/autosuspend_delay_ms: Input/output error
./power/runtime_enabled:disabled
./power/runtime_active_time:0
./power/control:auto
./power/async:disabled
./power/runtime_usage:0
./power/runtime_status:unsupported
./type:Processor
./max_state:10

Hmm. I seem to get _some_ throttling, even when bios_limit is still
1.8GHz, but I don't understand where it comes from. And yes,
'thermal_sys +fp' seems to produce some output.

[I did not get absolute records in >100C range this time, but still
there are "THERMAL EMERGENCY:" messages from thinkpad_acpi already...]

[14049.733423] thinkpad_acpi: THERMAL EMERGENCY: a sensor reports something is extremely hot!
[14049.735412] thinkpad_acpi: temperatures (Celsius): 92 50 N/A 80 32 N/A 32 N/A 50 59 N/A N/A N/A N/A N/A N/A
[14049.736557] update_temperature: thermal thermal_zone1: last_temperature=92000, current_temperature=93000
[14049.736570] thermal_zone_trip_update: thermal thermal_zone1: Trip1[type=1,temp=92500]:trend=1,throttle=1
[14049.736577] get_target_state: thermal cooling_device2: cur_state=0
[14049.736580] thermal_zone_trip_update: thermal cooling_device2: old_target=0, target=1
[14049.736586] get_target_state: thermal cooling_device1: cur_state=0
[14049.736589] thermal_zone_trip_update: thermal cooling_device1: old_target=0, target=1
[14049.736593] thermal_cdev_update: thermal cooling_device2: zone1->target=1
[14049.736643] thermal_cdev_update: thermal cooling_device2: set to state 1
[14049.736647] thermal_cdev_update: thermal cooling_device1: zone1->target=1
[14049.736666] thermal_cdev_update: thermal cooling_device1: set to state 1
[14049.808333] update_temperature: thermal thermal_zone1: last_temperature=93000, current_temperature=91000
[14049.808352] thermal_zone_trip_update: thermal thermal_zone1: Trip1[type=1,temp=92500]:trend=2,throttle=0
[14049.808360] get_target_state: thermal cooling_device2: cur_state=1
[14049.808364] thermal_zone_trip_update: thermal cooling_device2: old_target=1, target=0
[14049.808371] get_target_state: thermal cooling_device1: cur_state=1
[14049.808375] thermal_zone_trip_update: thermal cooling_device1: old_target=1, target=0
[14049.808381] thermal_cdev_update: thermal cooling_device2: zone1->target=0
[14049.808409] thermal_cdev_update: thermal cooling_device2: set to state 0
[14049.808414] thermal_cdev_update: thermal cooling_device1: zone1->target=0
[14049.808432] thermal_cdev_update: thermal cooling_device1: set to state 0
[14049.888385] update_temperature: thermal thermal_zone1: last_temperature=91000, current_temperature=92000
[14049.888401] thermal_zone_trip_update: thermal thermal_zone1: Trip1[type=1,temp=92500]:trend=1,throttle=0
[14049.888408] get_target_state: thermal cooling_device2: cur_state=0
[14049.888411] thermal_zone_trip_update: thermal cooling_device2: old_target=0, target=0
[14049.888416] get_target_state: thermal cooling_device1: cur_state=0
[14049.888419] thermal_zone_trip_update: thermal cooling_device1: old_target=0, target=0
[14051.312646] thinkpad_acpi: THERMAL EMERGENCY: a sensor reports something is extremely hot!
[14051.314442] thinkpad_acpi: temperatures (Celsius): 93 50 N/A 80 32 N/A 32 N/A 50 59 N/A N/A N/A N/A N/A N/A
[14051.315544] update_temperature: thermal thermal_zone1: last_temperature=92000, current_temperature=94000
[14051.315557] thermal_zone_trip_update: thermal thermal_zone1: Trip1[type=1,temp=92500]:trend=1,throttle=1
[14051.315564] get_target_state: thermal cooling_device2: cur_state=0
[14051.315567] thermal_zone_trip_update: thermal cooling_device2: old_target=0, target=1
[14051.315572] get_target_state: thermal cooling_device1: cur_state=0
[14051.315575] thermal_zone_trip_update: thermal cooling_device1: old_target=0, target=1
[14051.315579] thermal_cdev_update: thermal cooling_device2: zone1->target=1
[14051.315629] thermal_cdev_update: thermal cooling_device2: set to state 1
[14051.315633] thermal_cdev_update: thermal cooling_device1: zone1->target=1
[14051.315652] thermal_cdev_update: thermal cooling_device1: set to state 1
[14051.334873] thinkpad_acpi: THERMAL EMERGENCY: a sensor reports something is extremely hot!
[14051.337322] thinkpad_acpi: temperatures (Celsius): 93 50 N/A 80 32 N/A 32 N/A 50 59 N/A N/A N/A N/A N/A N/A
[14051.338746] update_temperature: thermal thermal_zone1: last_temperature=94000, current_temperature=93000
[14051.338760] thermal_zone_trip_update: thermal thermal_zone1: Trip1[type=1,temp=92500]:trend=2,throttle=1
[14051.338767] get_target_state: thermal cooling_device2: cur_state=1
[14051.338770] thermal_zone_trip_update: thermal cooling_device2: old_target=1, target=0
[14051.338777] get_target_state: thermal cooling_device1: cur_state=1
[14051.338781] thermal_zone_trip_update: thermal cooling_device1: old_target=1, target=0
[14051.338787] thermal_cdev_update: thermal cooling_device2: zone1->target=0
[14051.338811] thermal_cdev_update: thermal cooling_device2: set to state 0
[14051.338815] thermal_cdev_update: thermal cooling_device1: zone1->target=0
[14051.338834] thermal_cdev_update: thermal cooling_device1: set to state 0
[14051.454544] thinkpad_acpi: THERMAL EMERGENCY: a sensor reports something is extremely hot!
[14051.456827] thinkpad_acpi: temperatures (Celsius): 93 50 N/A 80 32 N/A 32 N/A 50 59 N/A N/A N/A N/A N/A N/A
[14051.457944] update_temperature: thermal thermal_zone1: last_temperature=93000, current_temperature=94000
[14051.457957] thermal_zone_trip_update: thermal thermal_zone1: Trip1[type=1,temp=92500]:trend=1,throttle=1
[14051.457964] get_target_state: thermal cooling_device2: cur_state=0
[14051.457967] thermal_zone_trip_update: thermal cooling_device2: old_target=0, target=1
[14051.457973] get_target_state: thermal cooling_device1: cur_state=0

...

									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

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