1. Forum
  2. USENET
  3. alt.comp.os.windows-11

  • Re: P cores and E cores

    From Brian Gregory@void-invalid-dead-dontuse@email.invalid to alt.comp.os.windows-11 on Fri Jan 2 22:02:32 2026
    From Newsgroup: alt.comp.os.windows-11

    On 24/11/2025 17:50, Andy Burns wrote:
    On a Win11 machine with an i5-1335U (2x P cores with hyperthreading, and
    8x E cores without HT)

    For manually setting CPU affinity, is it guaranteed that CPU0 to CPU3
    are the P cores and CPU4 to CPU11 are E cores?

    I don't know but on my Win 11 with 12th gen Intel PC it's the same, P
    cores starting from 0 then E cores.
    --
    Brian Gregory (in England).
    --- Synchronet 3.21a-Linux NewsLink 1.2
  • From Andy Burns@usenet@andyburns.uk to alt.comp.os.windows-11 on Sat Jan 3 00:33:18 2026
    From Newsgroup: alt.comp.os.windows-11

    Brian Gregory wrote:

    Andy Burns wrote:
    On a Win11 machine with an i5-1335U (2x P cores with hyperthreading,
    and 8x E cores without HT)

    For manually setting CPU affinity, is it guaranteed that CPU0 to CPU3
    are the P cores and CPU4 to CPU11 are E cores?

    I don't know but on my Win 11 with 12th gen Intel PC it's the same, P
    cores starting from 0 then E cores.
    Thanks, spent a couple of days messing with CPU affinity and using Intel extreme tuning utility (just for monitoring) and although the software
    seemed to be dividing it's load over multiple cores wuite well, it was
    hitting thermal throttling and quite soon afterwards power throttling,
    making it run choppily.

    Hoping to re-test on Core Ultra 5 instead of Core i5 soon ... more P
    cores and no hyperthreading at all ...


    --- Synchronet 3.21a-Linux NewsLink 1.2