Quest+LINK stutter every 20-30 minutes despite good frames

[Nealius]

Using Quest 2 + LINK cable, currently locked 72fps (refresh rate) up high in most missions, I still get a 1-2 second stutter every 20-30 minutes. Sometimes it's minor and only shows up in the headset. Sometimes it's major and shows up both in the headset and in DCS. It is always accompanied by the sound of my PC fans spooling up and then spooling back down once the stutter stops; as if there's a sudden PC load for 1-2 seconds that then disappears. It only happens in VR. Running a track of the same missions for screenshots and videos, this never happens. 

It has happened on two different GPUs. It has happened on three different LINK cables. It happens on 5 USB ports, including a powered USB hub. It happens on multiple headset settings (resolution, refresh rate). It happens on multiple DCS graphics settings, from low to medium. It happens with and without core priority/affinity tweaks. It happens with and without NVIDIA CP tweaks. It happens with and without clearing fxo/metashaders. Oculus debug tool settings are default.

At this point I don't know where to look or how to fix. Current pc specs are:

i5-9600k at 4.8Ghz
RTX 4070Ti Super 16GB
48GB DDR4
SSD with 32GB allocated to pagefile
 

[LOW_Hitman]

Am 27.8.2024 um 04:51 schrieb Nealius:

Using Quest 2 + LINK cable, currently locked 72fps (refresh rate) up high in most missions, I still get a 1-2 second stutter every 20-30 minutes. Sometimes it's minor and only shows up in the headset. Sometimes it's major and shows up both in the headset and in DCS. It is always accompanied by the sound of my PC fans spooling up and then spooling back down once the stutter stops; as if there's a sudden PC load for 1-2 seconds that then disappears. It only happens in VR. Running a track of the same missions for screenshots and videos, this never happens. 

It has happened on two different GPUs. It has happened on three different LINK cables. It happens on 5 USB ports, including a powered USB hub. It happens on multiple headset settings (resolution, refresh rate). It happens on multiple DCS graphics settings, from low to medium. It happens with and without core priority/affinity tweaks. It happens with and without NVIDIA CP tweaks. It happens with and without clearing fxo/metashaders. Oculus debug tool settings are default.

At this point I don't know where to look or how to fix. Current pc specs are:

i5-9600k at 4.8Ghz
RTX 4070Ti Super 16GB
48GB DDR4
SSD with 32GB allocated to pagefile
 

Maybe a powermanagement setting?

[Nealius]

Power management is all set to max performance, All USB ports as well.

[Ramstein]

using Multi-threading? Oculus Tool Tray?

[Nealius]

Using MT, not using OTT. 

[Ahdidaas]

Core parking?

[Nealius]

Power management to max performance disables core parking. 

However, I have DCS set to not use cores 0 and 1 because Oculus seems to like using those, and DCS gets absolutely horrid framerates if I don't set affinity to cores 2~6. 

Edited August 29, 2024 by Nealius

[LOW_Hitman]

hags on or off? After i disabled Hags nearly all stutters are gone

[Nealius]

What are hags?

[MAXsenna]

What are hags?

Hardware Accelerated Graphics?

Sent from my SM-A536B using Tapatalk

[Nealius]

Ah yeah, that and "game mode" are both off. 

The only two bits of clues I've been able to find so far are:

1. At some point, all 6 of my cores go to 100% (but haven't matched the timing to see if it's related to the stutter)
2. When there's a stutter my GPU dedicated memory dips slightly and "Copy" increases

Edited August 31, 2024 by Nealius

[LOW_Hitman]

vor 7 Stunden schrieb MAXsenna:

Hardware Accelerated Graphics?

Sent from my SM-A536B using Tapatalk
 

Yes - after setting this to off i got less stutters and a overall better performance

[Ahdidaas]

I realized my GPU was throttling at 80C.  I couldn't find a hardware setting that would turn that off (maybe cause I have a gaming laptop?).  Anyway, it took 3 attempts, but I have a (quiet) good performant cooler now.  In the heaviest of times on DCS, I hit 79, yet don't hit 80.   It stopped my stuttering.

[Nealius]

I don't think mine goes above 70, but next time I fly I plan on using MSI Afterburner to run my fans at 100% during the session to see if that makes a difference.