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For more information, aggregatoe section Choose the type you'd like to provide: So Shaohua Li went back and implemented this functionality as a driver instead. Our new feedback system is built on GitHub Issues.
The ACPI processor aggregator driver. At least not until we end up having the same issue on some other architecture too, and it turns from a hacky ACPI thing into something more.
ACPI Processor Aggregator Drivers Download for Free | Driver Talent
Report the thermal zone's temperature: As I am procesdor to start a project around Linux, realtime with electrical economy in mind, I will both watch and intervene on the subject - for its good I hope: The ACPI folks had originally proposed procesosr some hacks into the scheduler to implement this functionality.
This device describes and reports the status of a clamshell device's lid. For more information about thermal management, see the document titled "Thermal Management in Windows" on the Microsoft Connect website.
For more information, see section 9. And that's where things stand. Logical processor idling as a thermal mitigation The platform can indicate to the operating system that processor cores in the thermal zone should be idled instead of throttled.
ACPI provides a mechanism by which it can ask the system to make processors go idle in emergency situations; these can include power problems or an overheating system. The driver is little loved, but it will also be little used, can be replaced with a better mechanism if the right people care, and, in the mean time, it may solve a real problem for some users.
These changes, it seems, were little loved; that was the patch that Peter Zijlstra blocked outright. For more information, see the following: For example, a UEFI call to get the time should return the same time that the operating system would get by using the Time and Alarm device.
For more information, see the following:. Read about this change aggregatorr our blog post. Posted Oct 16, Product feedback Sign in to give documentation feedback. You may also leave feedback directly on GitHub.
When the emergency passes, the thread will go away and normal life resumes. Sensor devices track the temperature in each thermal aggregatpr. Specify thermal thresholds at which actions must be taken: It is expected that the time on the platform will be consistent when different firmware interfaces are used to query the platform time.
A certain commit merged for 2. Optionally, receive notifications of additional temperature threshold crossings: That thread, when it "runs," will simply put the CPU into procrssor relatively deep sleep state for a while.
For more information, see section 8. In fact, the only reason the scheduler people even know about it is that Len at first tried to do something more invasive, and was shot down.
When a thermal zone starts pocessor overheat, the operating system can take actions to cool down the devices in the zone.
The ACPI processor aggregator driver
For example, ACPI defines a power button, a sleep button, and system indicators. These capabilities maintain time-of-day information across system power transitions, and keep track of time even when the platform is turned off.
These actions can be categorized as either passive cooling or active cooling.
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