Learning Forum

[Shyam Prasad V Atri]

I have a tank which has these dimensions

x [-0.7,0.7]

y[-0.5 0.5]

z[-0.5 0.5]

I am trying to run the simulation with 4gpu and i keep getting error in the simulation. This error is so generic and i dont know why it is causing

Error:QSocketNotifier: Can only be used with threads started with QThread

I have given the correct gpu slicing --multi-gpu-slicing-direction=X but still i get this error

Can anyone suggest why?

[Lucas Bertollo Baggio]

Hello,

does it work for single GPU?

[Shyam Prasad V Atri]

It works for single gpu and two GPU the moment I request 3 GPU or 4gpu the simulation keeps erroring out 

[Lucas Bertollo Baggio]

Rocky works for single-node only. Are all your GPUs in the same node?

[Shyam Prasad V Atri]

Yes they are all on same node and same host 

[Shyam Prasad V Atri]

All 4gpus on same node and one computer. Still it errors out 

[Lucas Bertollo Baggio]

Would you give me more deatails about your case?

 

[Shyam Prasad V Atri]

Its a mixing tank of 1m diameter and 1m height. There is a top inlet pipe of  20cm and bottom outet pipe of 20cm in the x direction hence the total distance covered in x direction ranges from negative 0.7m to positive 0.7m. the pipe diameter is 10cm. I have about 700 sphero cylinder particles made of multiple elements (flexible one)

[Lucas Bertollo Baggio]

What GPUs are you using? Do you have license for using 4 GPUs? 

It also seems like you have very few particles for using 4 GPUs. 

[Shyam Prasad V Atri]

 

I gave 700 as an example… I have 70000 particles I want to add more than that too… I am using L40s or H100 or a100 gpu of University hpc cluster. I believe the universitys acadamic ansys license should allow the use of four gpus. i did not see any restrictions 

 

[Shyam Prasad V Atri]

Hello Lucas, Any idea why such a simulation is not working. Please let me know.