High gpu cooktime on inTOP

[motoishmz]

I am having trouble with the GPU Cook Time inTOP after renderTOP taking an abnormally long time. Even with a simple project like the screenshot, it takes 7 to 20 ms just for inTOP.

This issue seems to have been resolved in 2022.40000 in 2023,

FIXED: [2022.31030 win] Unusual high gpu cooktimes on inTOP

Hi there, I seem to get very high gpu cooktimes on the first inTOP I use after a renderTOP. First I thought it was just a printing error, but after some testing it really seems to take that amount of gpu time. I’ve also tried it using a selectTOP, but seems to give the same results. I’ve attached a proof of concept of the problem. Please check the gpu time of the inTOP inside the base1 comp. Cheers, tim ps. system used: windows 11, nvidia 2080ti [image] gpucooktimes.1.toe (8.6 KB)

but it appears to still be occurring.

High GPU timings on inTOPs

Hi Derivative team, I’ve been having some weird GPU timings in the latest versions of TD. Here in this screenshot you can see that I’m getting pretty high values on the gpu time of an inTOP. If I switch it to a slect TOP I still get really high timings. It seems pretty random and doesn’t always show up on the same TOPs when I open up my project file. Could something I’m doing be causing this? Sadly my project is quite big and I can’t reproduce this in a simpler file. Thanks for your help in ad…

Does anyone know of a solution?

OS:
Windows 11 Pro for Workstation

TouchDesigner / NVIDIA Driver Version (The latest as of today. Two types of drivers were tested):
2023.12370
Game Ready Driver 581.08 
Studio Driver 580.97

[motoishmz]

Reinstalling the NVIDIA driver (Studio/Game Ready) and restarting the PC will prevent this problem from occurring for a while. However, it will recur after 1-2 days. Once it recurs, the problem will continue indefinitely. Reproduction and debugging are difficult.

[malcolm]

Are you seeing frames drops when you see these high numbers, or is the only symptom the high number?

[motoishmz]

Sorry for the late reply.

In the end, I couldn’t figure out the exact cause.
It doesn’t seem that the inTOP itself has a heavy processing load — I think what’s shown there reflects some waiting time somewhere in the GPU pipeline.
The issue occurred even when GPU usage was under 10%, and sometimes there were frame drops, sometimes not. The problem reproduced inconsistently.

The strange thing is, the frame drops weren’t happening in this sample project I posted here, but in a production project I use for work. After downgrading TouchDesigner to version 2023.12000, the issue almost completely disappeared. There are still rare, random frame drops, but much less frequent now.

Since I can’t reliably reproduce or report the problem anymore, I’ll close this thread.
Sorry for the trouble, and thanks for your time!