[Question] Time cost increased while running multiple IsaacLab instances

[ZhizhuoUp]

Question

I just tried to run multiple IsaacLab instances at the same time. However, I found the time cost increased. For example, one running instance will spend 2 hours, the time cost of two running instances doubled (4 hours per instance), and 3 running instances tripled.

I'm not sure whether this phenomenon is usual in IsaacLab or if I haven't correctly used IsaacLab.

[RandomOakForest]

Thank you for posting this. Is this with Isaac Lab 2.0? I will move this post into our Discussions section for follow up. Thanks.

[ZhizhuoUp]

Thank you for your following up. Actually, my version should be 1.2.0

[kellyguo11]

Hi there, this may be because each process is fighting for CPU resources. You can try limiting the CPU thread used for each process by following the logic here - https://github.com/isaac-sim/IsaacLab/blob/main/source/isaaclab/isaaclab/app/app_launcher.py#L523.