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Intel Releases Linux Thermal Daemon

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  • GreatEmerald
    replied
    Originally posted by wargames View Post
    Quick question: why don't they just patch the current cpufreq subsystem ? Why reinvent the wheel ?

    Last question: that daemon runs in user space ? How efficient is that ? do we really a daemon for something that can be done by the kernel ?
    Why run it in kernel, if it can be run in userland? That's how all the power daemons worked so far (laptop-mode-tools, cpupower, fancontrol etc.), and the cpufreq kernel governors are just there to do one thing and one thing only - change the CPU frequency depending on the load. They don't detect temperatures and all that.

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  • wargames
    replied
    Quick question: why don't they just patch the current cpufreq subsystem ? Why reinvent the wheel ?

    Last question: that daemon runs in user space ? How efficient is that ? do we really a daemon for something that can be done by the kernel ?

    Leave a comment:


  • Ericg
    replied
    Originally posted by Kivada View Post
    Intel, why are you summoning these daemons?

    Interesting choice of a fire demon as a pun for a daemon that restricts heat.... more apt picture would have been an ice devil

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  • Kivada
    replied
    Originally posted by phoronix View Post
    Phoronix: Intel Releases Linux Thermal Daemon

    Intel has announced the release of an open-source Linux Thermal Daemon package for Linux. Intel's Linux Thermal Daemon is for monitoring and controlling platform temperatures...

    http://www.phoronix.com/vr.php?view=MTM2OTk
    Intel, why are you summoning these daemons?

    Leave a comment:


  • Ericg
    replied
    Originally posted by GreatEmerald View Post
    It doesn't really tell me anything. "latest cooling and P state drivers developed by Intel" does not necessarily mean Intel-specific. Although I didn't see a P-state listing in PowerTop on my AMD hardware, so I suppose it is Intel-specific? And I also have no clue what what the x86 register use means in this context.
    I'm assuming that Intel didn't develop drivers for AMD hardware, not really their style. So, yes, its Intel specific until AMD drivers are upstreamed and the daemon is patched to be aware of them.


    The register comment would imply that part of the x86 standard is defining a specific set of CPU registers that say "When this register is this, it means: go to xyz performance state." So somewhere there is a register, lets call it PowerLevel (i know its not) and when its set to 1, thats idle, 2 is low power, 3 is medium, 4 is high, and 5 is turbo. And this daemon can set specific registers to specific values to help control the temperature of the box.

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  • GreatEmerald
    replied
    Originally posted by Ericg View Post
    It says it will use the Intel specific drivers when available, when it can't use those then it will use the standarized x86 registers and the generic cpufreq infrastructure. Last line of the quoted text in the article.
    It doesn't really tell me anything. "latest cooling and P state drivers developed by Intel" does not necessarily mean Intel-specific. Although I didn't see a P-state listing in PowerTop on my AMD hardware, so I suppose it is Intel-specific? And I also have no clue what what the x86 register use means in this context.

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  • sheepdestroyer
    replied
    The specific driver you mention is already there in 3.9

    Michael, i crave a bench against usal ondemand and performance governors
    pretty please?

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  • Ericg
    replied
    Originally posted by GreatEmerald View Post
    That's interesting. Is it like PowerTop in that it's just developed by Intel, but works fine on AMD platforms as well?
    It says it will use the Intel specific drivers when available, when it can't use those then it will use the standarized x86 registers and the generic cpufreq infrastructure. Last line of the quoted text in the article.

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  • GreatEmerald
    replied
    That's interesting. Is it like PowerTop in that it's just developed by Intel, but works fine on AMD platforms as well?

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  • Ericg
    replied
    Just what I was looking for, for my ultrabook with only a single fan and an easily blocked vent haha

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