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intel / thermal_daemon

Thermal daemon for IA
GNU General Public License v2.0
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Handling of no_turbo #59

Closed pyamsoft closed 8 years ago

pyamsoft commented 9 years ago

To my understanding, writing a "1" to the no_turbo file in the intel_pstate sys directory will prevent the CPU from entering turbo frequencies. When a "1" is manually written to the no_turbo file, and then thermald is ran using the systemd service, thermald overwrites the manual assignment and enables turbo, writing a "0" as the value of no_turbo. Is there a way to prevent thermald from overriding manual assignment of the no_turbo value?

Arch Linux 64 bit Using the thermald package from the AUR modified to use the recently released thermald 1.4

spandruvada commented 9 years ago

On Mon, 2015-05-18 at 13:16 -0700, pyamsoft wrote:

To my understanding, writing a "1" to the no_turbo file in the intel_pstate sys directory will prevent the CPU from entering turbo frequencies. When a "1" is manually written to the no_turbo file, and then thermald is ran using the systemd service, thermald overwrites the manual assignment and enables turbo, writing a "0" as the value of no_turbo. Is there a way to prevent thermald from overriding manual assignment of the no_turbo value?

Good question. It will be a good enhancement. Currently thermald will own the field. You can remove Intel P state usage from thermald by removing "Intel P state" line from thermal-cpu-cdev-order.xml, search for this file from root

Arch Linux 64 bit Using the thermald package from the AUR modified to use the recently released thermald 1.4

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pyamsoft commented 9 years ago

I would not know though how thermald would be able to differentiate between writes to no_turbo that were manually made by a user, and writes made by a program or daemon like thermald. Perhaps it would be best that thermald owns the no_turbo field.

But thank you for your advice about the cdev-order file, I will see if it has the effect that I desire.

pyamsoft commented 9 years ago

Would there be a way to add a no_turbo like option to the thermal-conf.xml? This would be helpful for users who want thermald to manage the frequencies of the intel_pstate driver but not use turbo frequencies at all.