Closed Solved

Physical and Logical Cores: Setting affinities?

I am trying to figure out when using two physical cores with two logical HT cores how are they designated in Task Manager (XP)?
They are listed as CPU 0,1,2,3.
If I got it right 0 and 2 are physical processor number one with secondary HT logical processor.
And 1 and 3 are physical processor two with secondary HT logical processor.
I want to make sure this right since I am using FFMpeg to encode using two threads and just want to use one CPU.
I use task manager though I have tried SeeSaw to control affinities also.
Any thoughts would be appreciated
4 answers Last reply Best Answer
More about physical logical cores setting affinities
  1. Best answer
    From my understanding 1 physical core is just seen as 2 logical cores within windows, it's not 1 physical and 1 logical. Setting affinity, you should see the same performance regardless of what 2 threads you select.
  2. I have a dual xeon rig where each cpu is has hyperthreading.
    So there is two physical cores with two logical.
    DVD Flick is mutithreaded when it runs FFMpeg to encode.
    So I wanted the two threads the encoder is running to run on one of the
    physical processors (1 cpu w/ HT) thereby leaving me the other physical processor to handle other
    Basically I want to force the threads to run on one cpu leaving the other one free.
  3. Best answer selected by king smp.
  4. This topic has been closed by Maziar
Ask a new question

Read More

CPUs Processors Task Manager