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Thread: Powersave vs Conservative

  1. Senior Droid
    itwerk's Avatar
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    #1

    Exclamation Powersave vs Conservative

    which governer do you prefer? I just set all mine profile governer's to powersave. Anyone use conservative?
    DX 2.2 z4root
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  3. Developer
    adrynalyne's Avatar
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    #2
    Powersave locks you in at the low speed more often than not.

    No thanks

    Ondemand is fine. Although the kernel has its own omap profiles so I don't even know if these even actually make a difference.
  4. Senior Droid
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    #3
    i keep my normal use:
    max-1.2ghz
    min-125mhz
    governer-performance

    everything else i have on powersave. is this dumb?
    DX 2.2 z4root
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    #4
    Have you tested to see if it makes a difference?

    Like I said, there are omap specific cpu profiles in the kernel as well as these default governors. I am unsure if they even work...

    Someone else more schooled in the kernel than me will have to respond.
  6. Senior Droid
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    #5
    lol yea, i have no idea what "omap specific cpu profiles in the kernel" means
    DX 2.2 z4root
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    #6
    Alright, so in my kernel, these are the governors and how I have them set. Pretty much stock.

    # CPU Power Management
    #
    CONFIG_CPU_FREQ=y
    CONFIG_CPU_FREQ_TABLE=y
    # CONFIG_CPU_FREQ_DEBUG is not set
    CONFIG_CPU_FREQ_STAT=y
    # CONFIG_CPU_FREQ_STAT_DETAILS is not set
    CONFIG_CPU_FREQ_DEFAULT_GOV_PERFORMANCE=y
    # CONFIG_CPU_FREQ_DEFAULT_GOV_POWERSAVE is not set
    # CONFIG_CPU_FREQ_DEFAULT_GOV_USERSPACE is not set
    # CONFIG_CPU_FREQ_DEFAULT_GOV_ONDEMAND is not set
    # CONFIG_CPU_FREQ_DEFAULT_GOV_CONSERVATIVE is not set
    CONFIG_CPU_FREQ_GOV_PERFORMANCE=y
    # CONFIG_CPU_FREQ_GOV_POWERSAVE is not set
    CONFIG_CPU_FREQ_GOV_USERSPACE=y
    CONFIG_CPU_FREQ_GOV_ONDEMAND=y
    # CONFIG_CPU_FREQ_GOV_CONSERVATIVE is not set
    CONFIG_CPU_FREQ_MIN_TICKS=2
    CONFIG_CPU_FREQ_SAMPLING_LATENCY_MULTIPLIER=500
    CONFIG_CPU_IDLE=y
    CONFIG_CPU_IDLE_GOV_LADDER=y
    CONFIG_CPU_IDLE_GOV_MENU=y


    Now, there is another section in the kernel config that lists this:

    CONFIG_OMAP_SMARTREFLEX=y

    OMAP Frequently Asked Questions - TI
    18. What is Smart Reflex technology?

    Answer: TI’s SmartReflex™ Power and Performance Management Technologies reduce power consumption and optimize performance. SmartReflex technologies are a broad range of intelligent and adaptive hardware and software techniques that dynamically control voltage, frequency and power based on device activity, modes of operation and temperature. Key features include:

    The SmartReflex technologies approach is a holistic, aggressive way of reducing power while optimizing performance.
    SmartReflex technologies cross traditional boundary lines in systems, coordinating multiple processing cores.
    SmartReflex technologies alleviate chip-level leakage power dissipation at deep sub-micron process geometries.
    SmartReflex technologies go well beyond traditional device power management techniques and feature plans for next-generation solutions.
    TI has shipped hundreds of millions of devices with SmartReflex technologies.

    Now what I was saying is, I don't know if that replaces the default governor's functions, or if it works in tandem with them.
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    Matth3w's Avatar
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    #7
    I use ondemand. Not sure if I even notice a difference between it and conservative, but that's what I use.

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