Spyke
Wandererreply
r.nf

esync = alpha version

fsync = beta version

ntsync = final release

Ntsync got rid of performance degradation that can occur with some games under esync and fsync and that’s the why it's allowed to go in the mainline kernel, it has no downside.

39

Ntsync got rid of performance degradation that can occur with some games under esync and fsync

This explains SO MUCH! I was getting frustrated when games start out perfectly fine than 30 minutes in frames would drop significantly.

2
Laserreply
feddit.org

fsync isn't faster than ntsync, it's merely a workaround to match Linux to Windows synchronization primitives. From ntsync's official description:

It exists because implementation in user-space, using existing tools, cannot match Windows performance while offering accurate semantics.

So without this, you either have a huge perfomance hit in case of an accurate implementation or you have good performance, but might run into edge cases where software doesn't work well or at all because it's not accurate (see https://github.com/ValveSoftware/Proton/issues/2922 for examples)

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I don't think his statement is true though. If https://www.reddit.com/r/linux_gaming/comments/1ce7z19/gaming_on_linux_ep131_ntsync_vs_fsync_nobara_39/l1ho8od/ is not manipulated in any way, games with lots of these calls still get big improvements with ntsync over fsync (about 30% in this particular case, which is a massive boost). So while nobody can rule out that his statement may be true on average or in general, there are still cases where ntsync offers a tangible advantage – be it improved FPS or the fact that the game runs at all.

Edit: in the video that the thread is about, fsync didn't beat ntsync in a single one (or I missed it when jumping through it). In the best one, they were exactly tied. Sure, the difference wasn't really big, but again there are titles not working with fsync.

However, I want to stress that I'm not trying to talk about fsync. It's a good solution that significantly improved performance. But ntsync is, from everything I've seen, almost always better; how much depends on the case, and it never seems to be worse.

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lemmy.world

Well, he's talking about the kernel they are using in SteamOS. The Deck OS is also being extended to other handhelds.

4

Not sure there's a better way to say it. I guess "the SteamOS fork of the Linux kernel" would be more explicit, but I assume most people who would read this are aware that SteamOS is built on Linux.

3

I believe that NTsync delivers better compatibility. I do not remember the details but Fsync can cause problems sometimes. So this is more like performance without compromise.

Now that it is in the kernel, I would expect Wine to move to it and for Proton to follow suit.

One less hack to maintain.

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lemmy.world

That's pretty cool that PowerPC was mentioned. I wish I still had my IMac G5 to run Linux on.

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lemmy.world

You could also buy insanely expensive IBM enterprise hardware. I think they still do PowerPC stuff

3

I installed 6.14 on servers here and really see a non-trivial boost in efficiency, less CPU sitting in wait state and more executing applications.

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