Okay… now I’m extremely confused. Like beyond confused. Guys… I hate to say it but this might not be the Engine… I think it’s the 980 GTX or the current drivers from NVIDIA. Maybe I’m wrong and it is the engine but this is odd.
It might be how the card throttles itself under load but it’s fairly cool in my apartment and I just loaded up UE4 for the first time and did what you said . In a brand new project, it was roughly 2.3ms which is pretty much normal. So I said, well lets go back to my projects on a hunch not thinking it would make a difference and in my first project, I noticed that the Game Thread was barley over ~1.5ms and I had even more perf than my 4.6.1 build which was half that or a third. Then I decided to load the project I’ve been heavily working on for the dev grant program and my perf in my most intensive scene was 20+ more fps than even last night.
My guess is that it is something to do with the 980. I don’t know if that correlates with all the CPU - Wait For Event calls but Dealman, this makes me think there was a moment where you noticed good perf and then it got bad.
Now it could be the engine or something to do with the renderer but I hope this helps you and the team dig deeper into the issue . I’d have Epic give you or a tech an EVGA 980 GTX SC (Reference Cooler) to test and see if you notice inconsistencies with the engine. If so, keep an eye out for those Wait for events and maybe you may get more insight on what is going on.
EDIT: Then again, it being the card doesn’t explain why this wasn’t an issue in 4.6.1 but it might be possible that its just not 100% consistent. But I’ve seen quite a bit out there that people have suffered some perf issues why others have noticed the complete opposite. Staying positive though and thanks .
Thanks again and keep us posted!