topic How to permanently assign processor affinity with single logical processor to Inventor.exe? in Inventor Forum

How to permanently assign processor affinity with single logical processor to Inventor.exe?

Anonymous — Mon, 26 Apr 2021 13:49:59 GMT

My Inventor is going into 'Not Responding' mode with 100% CPU utilization when run on multiple logical processers (vCPUs). This issue is not occurring when I run it on single logical processer by setting its affinity to CPU0. But every time I launch the the Inventor.exe I have to set it manually.

How can I set the affinity permanently so that I don't have to set it manually each time? Is there any way to set it without using third party software and without creating the shortcut of Inventor.exe?

Re: How to permanently assign processor affinity with single logical processor to Inventor.exe?

swalton — Mon, 26 Apr 2021 15:23:50 GMT

I am not aware of a method inside Inventor to control processor affinity.

I understand that processor affinity is controlled by the Operating System. You will have to use Windows 10 features and commands to control which processor Inventor is using. I don't think you will avoid a custom shortcut to this behavior.

The lock-up behavior you report is not expected behavior of Inventor. I would file a support request with your reseller or Autodesk to see if there is a known issue, another solution, or something that can be patched.

Re: How to permanently assign processor affinity with single logical processor to Inventor.exe?

Anonymous — Mon, 26 Apr 2021 16:12:28 GMT

As Inventor is a single threaded application I wanted to know how can we
run it using a single logical processor permanently on a multi core cpu.

Re: How to permanently assign processor affinity with single logical processor to Inventor.exe?

Frederick_Law — Mon, 26 Apr 2021 16:18:10 GMT

See if this helps: https://bitsum.com/

Re: How to permanently assign processor affinity with single logical processor to Inventor.exe?

swalton — Mon, 26 Apr 2021 17:05:14 GMT

@Anonymous wrote:
As Inventor is a single threaded application I wanted to know how can we
run it using a single logical processor permanently on a multi core cpu.

Inventor is predominantly single-threaded, but it does have several portions that are multi-threaded. See:https://knowledge.autodesk.com/support/inventor/troubleshooting/caas/sfdcarticles/sfdcarticles/Support-for-multi-core-processors.html

I have seen Inventor consume 100% of my CPU during large FEA and complex drawing view calculations. InvMark did a nice job of loading up my Ryzen 3600 system. You might try it on your system. https://forums.autodesk.com/t5/inventor-forum/invmark-by-tfi-amp-cadac-inventor-performance-hardware-benchmark/td-p/10244509

To the best of my understanding, you will have to use the Windows 10 operating system settings and configuration options to create custom shortcuts or batch files that force Inventor to run on a single core.

Re: How to permanently assign processor affinity with single logical processor to Inventor.exe?

mcgyvr — Mon, 26 Apr 2021 17:09:14 GMT

@Anonymous wrote:
As Inventor is a single threaded application I wanted to know how can we
run it using a single logical processor permanently on a multi core cpu.

There are functions in Inventor that can take advantage of multiple cores.

Setting it to only use one would hinder performance in other areas of Inventor.

These areas utilize multi-core processors..

Drawing views

Creating or computing a precise view
Computing multiple views with “Enable background update” option on

Graphics

All view related commands (zoom, pan, rotate, and so on)
Raytracing
Rendering
Selection
Generating mesh

Import workflows

Importing any non-Inventor CAD file

Modeling commands

Most geometry modeling commands
Mass properties calculation
Freeform commands

Simplification

Feature removal workflows

Task Scheduler

Tasks can be scheduled as parallel processes

Re: How to permanently assign processor affinity with single logical processor to Inventor.exe?

johnsonshiue — Mon, 26 Apr 2021 18:36:13 GMT

Hi! To add to experts' comments, I am wondering why you want to restrict Inventor.exe to one CPU. Is it because your system is under-powered? Does it meet the minimum system requirement?

You may consider running Fusion 360. It supports Windows and Mac natively. Also, the system requirement may be more flexible and some of the workflows are done using cloud compute (cloud rendering and simulation)

Many thanks!