Wednesday, December 26, 2018

[Avid-L2] Mac Activity Monitor CPU Usage vs. %CPU?

 

For the fun I often open Acitvity Monitor when transcoding or other processor intensive processes to see how much of the 12 core is being used.

I can get up to 2,000 percent usage on Avid Transcodes depending on the codec and perhaps other factors I'm unaware of.  Today it CC 2015 Adobe Media Encoder and the CPU Usage window is screaming with all 24 bars up to the top.  The second bar of the core hyper thread is just a little below top and the first bars are all to the top.  My visual math would suggest approx 2,100 cpu percentage but in the Activity monitor window the %CPU is bouncing around 1,400 to 1,600 %CPU.  Curious why CPU Usage bars look like more core is being used?  IIRC with Avid it's more visually bar graph and %CPU comparable.  Is there something about how AME processes that would cause the perceived discrepancy.  I am running parallel encoding with ProResHQ and 2 H_264 encodes for each file.  Not a broke but makes me curious.

John Moore Barking Trout Productions Studio City, CA bigfish@pacbell.net

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Posted by: John Moore <bigfish@pacbell.net>
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this is the Avid-L2

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