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0x2000580D/README.md

hi

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  1. Using XCPM to sample P-States on Int... Using XCPM to sample P-States on Intel Macs
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    This is a demonstration on a simple way you can get CPU P-State distribution, turbo states, and average package frequency on Intel Macs by accessing the XCPM (XNU CPU Power Manager) through `ioctl`.
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    I figured it out while reverse engineering the x86 portion of [powermetrics](https://ss64.com/mac/powermetrics.html) and managed to find the function pointers [here](https://github.com/acidanthera/CPUFriend/blob/30c773385312b4b46255d9432aacf02c91fece4e/Tools/FrequencyVectors.bt#L123). Structures recreated from scratch.
    
              
    
              
    
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    Sadly requires root (as does everything of this nature on Intel). This only works on Haswell or newer though (no XCPM before then).
    
              
    
          
    
    
    
  
    

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