Open GL core profile: Better or not?
I do not believe it will make any noticeable difference in performance but may give much better graphics, depending on your graphics card and drivers. One thing that will help is to make sure you have the Limit effects to optimize performance checked.
John Hackney, Retired
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What kind of performance issues?
Can you describe that in more detail?
Can you specify "very large" ?
Thanks for providing those details.
300 is not a large component count. The often state performance "limit" is 1000+ components but I've seen models that perform just fine over that limit.
The symptoms you describe do not sound like graphics performance issues they sound more like selection issues and timeline re-computation issues. Is that assembly a design you can share ?
In general, most CAD systems don't utilize much of the GPU and not much of the CPU. Anything that has to do with creation/computation of geometry is preformed by the geometric modeling kernel. The development on most geometric modeling kernels (ASM a fork of the early ACIS kernel in this case), started before multi core processors and multi threading were a thing. Also, a lot of the the math that builds the foundation of these kernels does not lend itself to parallelization.
CAD systems perform best on computers with fewer cores but high clock frequency.
Based on this thread I would conclude that Open GL core should offer improved performance. But the thread is pretty old and hardware and OS have significantly changed since then.
If that does not answer your question, I can take this to the EE Slack Channel. Feedback might take a while though.
Also, in this thread on the Feedback Forum @dvd.mlm is asking for "slow assemblies". This might present a good opportunity for the Fusion 360 team to look into.
@Ex_Machina_Engineering wrote:
No, unfortunately, I cannot share the assembly.
As for the utilization in CAD. The GPU is going into power save mode when Fusion hangs. That means that nothing is asked of it. And the CPU is hovering around 5-8%. Which is basically idling in Windows. Again, this happens when working on isolated components inside subassemblies. Not when executing commands at the top level that will affect tens or hundreds of components.
What is the clock speed showing when you see 8%? Fusion will basically run one thread flatout when it's working hard, my PC with 8 threads will show 17% but the speed will go up to the max, more threads and cores would make no difference apart from the Utilisation would drop, 16 cores would show 8%.
Would you be able to share the design with someone from Autodesk like @jeff_strater ?
Mark
Mark Hughes
Owner, Hughes Tooling
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@Ex_Machina_Engineering wrote:
... utilization in the Windows Task Manager ...
I overlooked that "Windows" part. I doubt that OpenGL core has any performance advantages over DirectX in Fusion 360 on Window's machines.
On macOS there is no DirectX so there OpenGL is the only API available.
