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Re: [PATCH v2 4/5] thermal: bang-bang governor: act on lower trip boundary

Started byJavi Merino <javi.merino@arm.com>
First post2016-05-24 15:10 +0200
Last post2016-05-25 05:40 +0200
Articles 4 — 3 participants

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  Re: [PATCH v2 4/5] thermal: bang-bang governor: act on lower trip  boundary Javi Merino <javi.merino@arm.com> - 2016-05-24 15:10 +0200
    Re: [PATCH v2 4/5] thermal: bang-bang governor: act on lower trip  boundary "Peter Feuerer" <peter@piie.net> - 2016-05-24 15:20 +0200
    Re: [PATCH v2 4/5] thermal: bang-bang governor: act on lower trip  boundary "Peter Feuerer" <peter@piie.net> - 2016-05-24 19:40 +0200
      Re: [PATCH v2 4/5] thermal: bang-bang governor: act on lower trip  boundary Caesar Wang <wxt@rock-chips.com> - 2016-05-25 05:40 +0200

#1406141 — Re: [PATCH v2 4/5] thermal: bang-bang governor: act on lower trip boundary

FromJavi Merino <javi.merino@arm.com>
Date2016-05-24 15:10 +0200
SubjectRe: [PATCH v2 4/5] thermal: bang-bang governor: act on lower trip boundary
Message-ID<rCkfU-3Ft-27@gated-at.bofh.it>
Ccing Peter Feuerer, author of the bang bang governor.

On Tue, May 03, 2016 at 05:33:32PM +0800, Caesar Wang wrote:
> From: Sascha Hauer <s.hauer@pengutronix.de>
> 
> With interrupt driven thermal zones we pass the lower and upper
> temperature on which shall be acted, so in the governor we have to act on
> the exact lower temperature to be consistent. Otherwise an interrupt maybe
> generated on the exact lower temperature, but the bang bang governor does
> not react since The polling driven zones have to be one step cooler before
> the governor reacts.
> 
> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
> Signed-off-by: Caesar Wang <wxt@rock-chips.com>
> Cc: Zhang Rui <rui.zhang@intel.com>
> Cc: Eduardo Valentin <edubezval@gmail.com>
> Cc: linux-pm@vger.kernel.org
> 
> ---
> 
> Changes in v2:
> - Update the commit for patch[v2 4/5].
> 
>  drivers/thermal/gov_bang_bang.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/thermal/gov_bang_bang.c b/drivers/thermal/gov_bang_bang.c
> index 70836c5..9d1dfea 100644
> --- a/drivers/thermal/gov_bang_bang.c
> +++ b/drivers/thermal/gov_bang_bang.c
> @@ -59,7 +59,7 @@ static void thermal_zone_trip_update(struct thermal_zone_device *tz, int trip)
>  		if (instance->target == 0 && tz->temperature >= trip_temp)
>  			instance->target = 1;
>  		else if (instance->target == 1 &&
> -				tz->temperature < trip_temp - trip_hyst)
> +				tz->temperature <= trip_temp - trip_hyst)
>  			instance->target = 0;
>  
>  		dev_dbg(&instance->cdev->device, "target=%d\n",
> -- 
> 1.9.1
> 
> --
> To unsubscribe from this list: send the line "unsubscribe linux-pm" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html
> 

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#1406160

From"Peter Feuerer" <peter@piie.net>
Date2016-05-24 15:20 +0200
Message-ID<rCkpA-3IP-23@gated-at.bofh.it>
In reply to#1406141
Hi,

24. Mai 2016 15:06 Uhr, "Javi Merino" <javi.merino@arm.com> schrieb:
> Ccing Peter Feuerer, author of the bang bang governor.

thanks, will take care today in the evening.

--peter;


> 
> On Tue, May 03, 2016 at 05:33:32PM +0800, Caesar Wang wrote:
> 
>> From: Sascha Hauer <s.hauer@pengutronix.de>
>> 
>> With interrupt driven thermal zones we pass the lower and upper
>> temperature on which shall be acted, so in the governor we have to act on
>> the exact lower temperature to be consistent. Otherwise an interrupt maybe
>> generated on the exact lower temperature, but the bang bang governor does
>> not react since The polling driven zones have to be one step cooler before
>> the governor reacts.
>> 
>> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
>> Signed-off-by: Caesar Wang <wxt@rock-chips.com>
>> Cc: Zhang Rui <rui.zhang@intel.com>
>> Cc: Eduardo Valentin <edubezval@gmail.com>
>> Cc: linux-pm@vger.kernel.org
>> 
>> ---
>> 
>> Changes in v2:
>> - Update the commit for patch[v2 4/5].
>> 
>> drivers/thermal/gov_bang_bang.c | 2 +-
>> 1 file changed, 1 insertion(+), 1 deletion(-)
>> 
>> diff --git a/drivers/thermal/gov_bang_bang.c b/drivers/thermal/gov_bang_bang.c
>> index 70836c5..9d1dfea 100644
>> --- a/drivers/thermal/gov_bang_bang.c
>> +++ b/drivers/thermal/gov_bang_bang.c
>> @@ -59,7 +59,7 @@ static void thermal_zone_trip_update(struct thermal_zone_device *tz, int trip)
>> if (instance->target == 0 && tz->temperature >= trip_temp)
>> instance->target = 1;
>> else if (instance->target == 1 &&
>> - tz->temperature < trip_temp - trip_hyst)
>> + tz->temperature <= trip_temp - trip_hyst)
>> instance->target = 0;
>> 
>> dev_dbg(&instance->cdev->device, "target=%d\n",
>> --
>> 1.9.1
>> 
>> --
>> To unsubscribe from this list: send the line "unsubscribe linux-pm" in
>> the body of a message to majordomo@vger.kernel.org
>> More majordomo info at http://vger.kernel.org/majordomo-info.html

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#1406304

From"Peter Feuerer" <peter@piie.net>
Date2016-05-24 19:40 +0200
Message-ID<rCotc-6fG-17@gated-at.bofh.it>
In reply to#1406141
Hi,

24. Mai 2016 15:06 Uhr, "Javi Merino" <javi.merino@arm.com> schrieb:
> Ccing Peter Feuerer, author of the bang bang governor.
> 
> On Tue, May 03, 2016 at 05:33:32PM +0800, Caesar Wang wrote:
> 
>> From: Sascha Hauer <s.hauer@pengutronix.de>
>> 
>> With interrupt driven thermal zones we pass the lower and upper
>> temperature on which shall be acted, so in the governor we have to act on
>> the exact lower temperature to be consistent. Otherwise an interrupt maybe
>> generated on the exact lower temperature, but the bang bang governor does
>> not react since The polling driven zones have to be one step cooler before
>> the governor reacts.
>> 
>> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
>> Signed-off-by: Caesar Wang <wxt@rock-chips.com>
>> Cc: Zhang Rui <rui.zhang@intel.com>
>> Cc: Eduardo Valentin <edubezval@gmail.com>
>> Cc: linux-pm@vger.kernel.org

Acked-by: Peter Feuerer <peter@piie.net>


>> 
>> ---
>> 
>> Changes in v2:
>> - Update the commit for patch[v2 4/5].
>> 
>> drivers/thermal/gov_bang_bang.c | 2 +-
>> 1 file changed, 1 insertion(+), 1 deletion(-)
>> 
>> diff --git a/drivers/thermal/gov_bang_bang.c b/drivers/thermal/gov_bang_bang.c
>> index 70836c5..9d1dfea 100644
>> --- a/drivers/thermal/gov_bang_bang.c
>> +++ b/drivers/thermal/gov_bang_bang.c
>> @@ -59,7 +59,7 @@ static void thermal_zone_trip_update(struct thermal_zone_device *tz, int trip)
>> if (instance->target == 0 && tz->temperature >= trip_temp)
>> instance->target = 1;
>> else if (instance->target == 1 &&
>> - tz->temperature < trip_temp - trip_hyst)
>> + tz->temperature <= trip_temp - trip_hyst)
>> instance->target = 0;
>> 
>> dev_dbg(&instance->cdev->device, "target=%d\n",
>> --
>> 1.9.1
>> 
>> --
>> To unsubscribe from this list: send the line "unsubscribe linux-pm" in
>> the body of a message to majordomo@vger.kernel.org
>> More majordomo info at http://vger.kernel.org/majordomo-info.html

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#1406577

FromCaesar Wang <wxt@rock-chips.com>
Date2016-05-25 05:40 +0200
Message-ID<rCxPP-4ey-7@gated-at.bofh.it>
In reply to#1406304
On 2016年05月25日 01:34, Peter Feuerer wrote:
> Hi,
>
> 24. Mai 2016 15:06 Uhr, "Javi Merino" <javi.merino@arm.com> schrieb:
>> Ccing Peter Feuerer, author of the bang bang governor.
>>
>> On Tue, May 03, 2016 at 05:33:32PM +0800, Caesar Wang wrote:
>>
>>> From: Sascha Hauer <s.hauer@pengutronix.de>
>>>
>>> With interrupt driven thermal zones we pass the lower and upper
>>> temperature on which shall be acted, so in the governor we have to act on
>>> the exact lower temperature to be consistent. Otherwise an interrupt maybe
>>> generated on the exact lower temperature, but the bang bang governor does
>>> not react since The polling driven zones have to be one step cooler before
>>> the governor reacts.
>>>
>>> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
>>> Signed-off-by: Caesar Wang <wxt@rock-chips.com>
>>> Cc: Zhang Rui <rui.zhang@intel.com>
>>> Cc: Eduardo Valentin <edubezval@gmail.com>
>>> Cc: linux-pm@vger.kernel.org
> Acked-by: Peter Feuerer <peter@piie.net>

Okay, thanks your reviewing. :)

>
>
>>> ---
>>>
>>> Changes in v2:
>>> - Update the commit for patch[v2 4/5].
>>>
>>> drivers/thermal/gov_bang_bang.c | 2 +-
>>> 1 file changed, 1 insertion(+), 1 deletion(-)
>>>
>>> diff --git a/drivers/thermal/gov_bang_bang.c b/drivers/thermal/gov_bang_bang.c
>>> index 70836c5..9d1dfea 100644
>>> --- a/drivers/thermal/gov_bang_bang.c
>>> +++ b/drivers/thermal/gov_bang_bang.c
>>> @@ -59,7 +59,7 @@ static void thermal_zone_trip_update(struct thermal_zone_device *tz, int trip)
>>> if (instance->target == 0 && tz->temperature >= trip_temp)
>>> instance->target = 1;
>>> else if (instance->target == 1 &&
>>> - tz->temperature < trip_temp - trip_hyst)
>>> + tz->temperature <= trip_temp - trip_hyst)
>>> instance->target = 0;
>>>
>>> dev_dbg(&instance->cdev->device, "target=%d\n",
>>> --
>>> 1.9.1
>>>
>>> --
>>> To unsubscribe from this list: send the line "unsubscribe linux-pm" in
>>> the body of a message to majordomo@vger.kernel.org
>>> More majordomo info at http://vger.kernel.org/majordomo-info.html
>
>

-- 
caesar wang | software engineer | wxt@rock-chip.com

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