topic Re: CAM only using Intel E-cores in Fusion Support Forum

CAM only using Intel E-cores

l.mclarenXECR9 — Wed, 20 Sep 2023 03:49:17 GMT

I'm having an issue with the i7-12850HX in my laptop. The CAM operations (Blend and 3d addaptive) are only using the slow E-cores to calculate toolpaths. Is there any way to force it to use only the power cores?

Thanks,

Lachlan

Re: CAM only using Intel E-cores

lance.carocci — Wed, 20 Sep 2023 22:33:09 GMT

Thanks for the report, @l.mclarenXECR9! We will investigate this issue. Please let me know if you observe any other notable core optimization issues.

Re: CAM only using Intel E-cores

jeff.pek — Thu, 21 Sep 2023 09:24:45 GMT

@l.mclarenXECR9 - What OS/version are you using?

Thanks,

Jeff

Re: CAM only using Intel E-cores

HughesTooling — Thu, 21 Sep 2023 09:58:10 GMT

There have been a couple more reports of this problem.

https://forums.autodesk.com/t5/fusion-360-support/bug-report-rendering-on-cpus-with-p-cores-and-e-cores/m-p/11917086#M173250

https://forums.autodesk.com/t5/fusion-360-support/fusion-360-rendering-only-utilizes-e-cores-on-intel-12th-gen/m-p/11176858#M150671

Also looking at Google a big problem with games as well!

Re: CAM only using Intel E-cores

lance.carocci — Thu, 21 Sep 2023 15:48:45 GMT

@HughesTooling, yeah the rub here is that Intel/Microsoft have largely avoided giving apps a way to force execution on P vs E cores. In addition, Intel Thread Director's logic is much more robust in Windows 11 than it is in 10, and does a better job of reassigning these threads from E to P cores. 10 is pretty simple in its support.

@l.mclarenXECR9 from the screenshots it looks like you may be using Windows 10. While there may be some forms of optimization that can be done on the Fusion 360 side, by and large the best optimization of your processor is going to come from upgrading to Windows 11.

Re: CAM only using Intel E-cores

l.mclarenXECR9 — Fri, 22 Sep 2023 05:53:36 GMT

@jeff.pek I'm running Windows 10 Education (Version 22H2) . I'll see if IT has a Windows 11 build available and report back.