Found this very good video around Lasso and AMD 3D cache perf, you might be interested it … (Has EN subtitles from the CC menu)
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That was an interesting video. My biggest takeaway was that the 7950X3D performs best in two scenarios:
- Game Bar ON, no Process Lasso, ‘Balanced’ power plan.
- Game Bar OFF, Process Lasso to set CPU affinities, ‘High Performance’ power plan.
The latter being slightly preferred (although I’d like to see a CapFrameX comparison of 1% and 0.1% lows.)
For the 7800X3D (and presumably the 5800X3D) Game Bar ON, no Process Lasso, ‘Balanced’ power plan.
This contradicts my current understanding, but he seems knowledgable. More importantly, he did some actual testing.
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Interesting. Its a year later and MSFS has seen some optimisations, on my 7800X3D (SMT off when i tested it), MSFS used all cores but core 0. Will test again as i have SMT on now again.
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MSFS as been using all 8 (+8) of my cores for over a year
haha, weird. I gotta check tonight if that changes with the SMT on now.
So thinking of giving Lasso a try. I9 14900kf, W11. Just trying to make sure I’ve been understanding this correctly. Remove the sim from using Core 0(Windows core) and it could/should be using cores 1-7(performance cores)?
Now the external apps I use are the Fenix, Atmos, Mobiflight. I would imagine I would want the Fenix on the perf cores as well, but Atmos, Mobi and for instance, V-Pilot(If I ever join Vatsim) could/should run on the efficiency cores?
I don’t know much about Intel CPU’s, but the i9 14900KF has 24 cores: 8 P-cores and 16 E-cores. I assume those would should up as 48 cores with hyperthreading enabled.
Intel has a thread scheduler called APO (Application Process Optimizer) that works with 14th gen CPU’s like yours. Again, I don’t know much about it, but this video explains it fairly well.
His testing shows that in some games Process Lasso actually hurts gaming performance (in some cases making the game unplayable) mostly because you can’t disable APO, and it ‘fights’ Lasso. Unfortunately, he doesn’t test MSFS (2020 or 2024) so it’s up to you to decide whether to try it.
It is mentioned that Lasso has a feature called ‘CPU Sets’ which is similar to ‘Affinities,’ but works better on Intel CPU’s. This feature is only available on the Pro (paid) version of Lasso, however.
He ends the video advising against using Process Lasso on Intel.
But he also says “Test it yourself.”
I recommend CapFrameX for testing.
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