VR - Random Frame Skips

[Glazarus]

I bought a Valve Index headset and installed everything properly. Using a RTX 2080ti and a water cooled and slightly overclocked i9-7960x I have more than enough for simple VR games on low settings. 

The rendering is smooth in every game, even Half Life Alyx at Ultra settings. 

 

However, there are these very distinct frame skippings occurring randomly with around 8-10 seconds intervals. They doesn't seem to be related to any CPU bottlenecks or GPU problems, both being at 12% and 40% in Steam Home.

I've tried seeing any correlation between software jumping up in use in the activity monitor when the spike occurs, but nothing shows. I've tried all possible combination of settings in the NVidia settings and no luck.

 

Looking at the advance frame timing graph in SteamVR I can see that the "WaitGetPoses" drops entirely when the spike goes up for everything else. The "WaitGetPoses" has to do with the position of the headset, but I can't figure out if this is how the computer and software is handling and sending that data (out) or if this is before the computer and software handles the data (in).

 

I've looked around and seen that some Unity developers seem to have similar problems, but there are no consistent answers to any of this while the "reinstall windows 10" standard answers are the most common non-answers. I think that figuring out why this thing is happening is preferable before jumping to a solution.

 

Anyone else who experience this thing? 

 

 

 

 

 

[mbntr]

SIMPLE VR ON LOW SETTINGS?!?! that is one of the best possible cards you can find.

Regarding your problem it is likely to be be just a driver issue, or windows 10 being on crack

[Glazarus]

4 minutes ago, mbntr said:

SIMPLE VR ON LOW SETTINGS?!?! that is one of the best possible cards you can find.

Yeah, which is my point. The card is one of the best cards and the processor isn't the worst for gaming and within a very simple rendered environment, like the grid/mountain loading screen for SteamVR, which gets the timing of the GPU down to 0,4, you still get these hiccups from "WaitGetPoses".

 

Since everyone supposedly are on the same drivers for SteamVR and Nvidia, it would be interesting to hear the frame timing others have. This is an issue that can be hard to spot when just casually playing, but it's glaring in slower things and if you notice a large purple spike in the in-headset graph it's that thing.

[Stahlmann]

Try and play once without the OC on the CPU. Had weird Frame issues when overclocking the 8600K i had in the past.

[Glazarus]

38 minutes ago, Stahlmann98 said:

Try and play once without the OC on the CPU. Had weird Frame issues when overclocking the 8600K i had in the past.

Unfortunately I have and it's not that.