Issue#66647: Intel - Using RAPL utility to distribute power between CPU and GPU

  • Hi,

     

    We have i7-4790K processor with integrated HD 4600 graphics. It is a 88W TDP part.

     

    I recently used RAPL to measure power of x86-cores (pp0) , GPU (pp1) and the package (pkg) as a whole. One thing, I noticed during my experiments is that the maximum power dissipated in CPU and GPU devices are very different. In particular, I noticed that the maximum pp0 power is around 45W while maximum pp1 power is only about 18 watt across wide range of cpu-gpu workloads.

     

    Further, by putting a lower cap on pp0 and pp1 domains, I am able to bring down the power dissipation in each domain. However, I am not able to increase the maximum power allowed to dissipate in GPU (pp1). I am wondering if there is a way to increase the power limit of pp1 domain?

     

    Thanks,
    Kapil

    0 Answers

    Sorry, your answer is too short !

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