[SOLVED] Help me understand why restarting a flight results in a dramatic performance boost

User Support Hub Hardware & Peripherals
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I hear you mate. However i am on a balancing act with the quest 3. The Quest is great in some ways, but really annoying in others. For example:

With no ASW the quest wont run stable. Not with link nor VDXR.

I can never reach native 72hz. Well i could, but graphcs would be rubbish, and i am so used to 3800+ resoloution (1.4 super sample) i simply cant go backwards.

ASW doesnt work at 40fps, nor 45fps. It only works smooth as butter at 36fps locked, and ASW takes me 72hz/fps.

If i go below 36, its good night vienna, total breakdown. If i have too much headroom fps, it rises above the lock, and i see 39-40-41 fps on the counter, and at that point i get stutters. So i have to tweak to get that range of 36-38. I got in bang on, but it took me months to tune, and now with this instability in game, its very tedious to say the least. Dont get me wrong, ive had some amazingly buttery smooth flights, and just when i think its stable, it gets whacked.

The pimax light will be here later this week, and i hear its more tolerant of roaming fps, but i do worry that it will be choppy at 36/40 and even 45fps. Its got no ASW/Frame interpolation, and i am worried it will chop. Funnily enough, no reviewers mention this, which makes me somewhat suspicious.

Quest has never worked at 45fps ASW off. It ghosts. Both on OpenXR and Steam VR and VDXR. It must be the latency of the USB connection.

Apologies for the rant. It literally just spewed out :wink: So is my frustration lately. The prospect of 2024 is itching me really badly. So much hope, yet so many fears :slight_smile:

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It’s more like this:

  • Rolling Cache is always ON
  • Exact same flight path with exactly the same settings and conditions.

Flight 1: 35 FPS / 35ms
Flight 2: 35 FPS / 35ms
Flight 3: 55 FPS / 22ms
Flight 4: 35 FPS / 35ms
Restart the flight. Not the sim…just the flight. 55 FPS / 22ms

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This might be interesting to know.
Specially for 7950x3d but also other AM5 based Ryzen CPUs I guess.

It’s about using a 3rd party software ( Process Lasso) to figure out which core is better and other deep-inside-the-BIOS stuff, so not for everyone.

The good thing is that with MSFS 2024 this might be absolete because of better multi threading :slight_smile:

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I’ve probably put 20 hours into fine-tuning both the PBO settings for my 7950X3D, as well as tuning core affinities, core sets, and core priorities for all the processes Process Lasso can control. IMO, PL is a must with this CPU.

I use CoreCycler to stress the cores one at a time, looking for the maximum negative offsets per core that remain stable and boost to the maximum rated frequency of the Vcache and non-Vcache cores.

In fact, I’m running core cycler on the gaming computer as I type this on my laptop.

I’ve also been experimenting with Game Mode, Xbox Game Bar, HAGS, and other more esoteric BIOS settings.

I’m posting all my test results in this thread.

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ooh… yeah, sorry…
I should have read your post more in-dept.
Hmmm strange one.
I have been about to press the “buy”-button several times the last week, but your problem isn’t great to think of.
it seems that some got “problems of some kind” with 7950 and others don’t.
I hope your problem will be solved (and that you post in here if you figure out something… please :slight_smile: )

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I honestly believe I’m seeing the results I’m seeing because of the primitive core optimization of FS2020 code.

There’s no doubt the 7950X3D is a beast of a CPU. But its architecture makes it a tuner’s chip. The 7800X3D is a lot easier to optimize for the current sim, and it’s a beast of a gaming chip in it’s own right.

Honestly, I should have bought the 7800X3D when it was discounted below $300 for a few weeks. But I didn’t, and ended up buying the 7950X3D for a good price during Amazon Prime Days.

I’ll continue posting my tuning methodologies and test results in my ‘Journey’ thread.

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I read somewhere that Microsoft and AMD has been/is “working together” about some game stuff.

Just thinking out loud, but…
If Seb has been involved too they might have some cool updates build-in for 2024 :thinking:

Yeah… I try not to buy anything yet (got a 3900x lol) to see how 2024 “acts up” and maybe even wait for the 99xxX3D…
It’s kinda tough to figure out as well what to actually buy.

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Im thinking that, in all fairness, this kind of granular performance problem may very well be caused by the Ms GDK. And if it is the case… i think there is little asobo can do about it.

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Just in case… :slight_smile: I guess I’m the only gamer in the world who hasn’t heard about/seen this video (just found it today), but posting it in this thread anyway.
There was also made a follow-up video on this some days later.

Also a link to the reddit thread where I saw this.
https://www.reddit.com/r/hardware/comments/1essf2t/windows_bug_found_hurts_ryzen_gaming_performance/

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So, I’ve got to reconfigure all my apps?

And of course @TenPatrol was correct as usual :wink:

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AMD CPU boost with Windows 11 preview version 24H2 - Discussion Hub / General Discussion - Microsoft Flight Simulator Forums

edit
@BegottenPoet228 has made several drastic changes to the system settings (Windows), NVIDIA drivers, and BIOS making it difficult to diagnose the root cause and I won’t even attempt it.
In any case, testing while flying over Europe is currently not recommended.
@BegottenPoet228 it’s good that you brought this issue to the community attention as it might spark some insight for the game developers.

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I posted this problem last night as a bug report.

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This will answer your questions if you are using the 7900X3D or the 7950X3D. Please give it a look.

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Thanks. I followed that video a week ago. My chipset drivers are up-to-date, my BIOS is set to use ‘Drivers’ and core parking is working as it should.

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Restarting a flight also helps to load a plane normally - for example, on my system the IniBuild A320N V2 does not call from the EFB the Jetway to connect to the plane, but if I restart the flight it calls (but does not allow to call for a tug).

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Once I start the flight and hit the “Fly” button I flew the plane for a few minutes and then restarted the flight and saw no improvement in performance. Tried a few more times and still no improvements. Do you have to restart the flight immediately after hitting the “Fly” button? Or maybe restart before you hit the “Fly” button?

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I do it just after I am in the cockpit, in a second or 2

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Tried that several times and no change in performance. :thinking:

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Repeatable performance bug - Restarting a flight drastically improves FPS and frametimes - Bug Reporting Hub / Install, Performance & Graphics - Microsoft Flight Simulator Forums

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I restart the flight around 15-20 seconds after hitting ‘Fly.’

Interestingly, I did a flight in the Bonanza over the Sahara yesterday, and did not experience this. But a floow up flight over NYC had the same issue. Photogrammetry, maybe? I’ll turn it off and test NYC.

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