Is there a solution to the buffer overflow?

Omniverse Isaac Sim
1

Hello everyone,

I am trying to use Isaac Lab to apply reinforcement learning to an original Hexapod Robot. However, I am encountering the following error.

2024-07-11 06:56:38 [26,663ms] [Error] [omni.physx.plugin] PhysX error: Patch buffer overflow detected, please increase its size to at least 372736 in the scene desc!
, FILE /builds/omniverse/physics/physx/source/gpunarrowphase/src/PxgNarrowphaseCore.cpp, LINE 1272
2024-07-11 06:58:10 [118,262ms] [Error] [omni.physx.plugin] PhysX error: Patch buffer overflow detected, please increase its size to at least 351088 in the scene desc!
, FILE /builds/omniverse/physics/physx/source/gpunarrowphase/src/PxgNarrowphaseCore.cpp, LINE 1272
2024-07-11 06:58:10 [118,380ms] [Error] [omni.physx.plugin] PhysX error: Patch buffer overflow detected, please increase its size to at least 320646 in the scene desc!
, FILE /builds/omniverse/physics/physx/source/gpunarrowphase/src/PxgNarrowphaseCore.cpp, LINE 1272
2024-07-11 06:58:10 [118,774ms] [Warning] [omni.kit.notification_manager.manager] PhysX error: Patch buffer overflow detected, please increase its size to at least 351088 in the scene desc!

From this conversation, I understand that I need to manually extend the buffer. However, I am unsure where to implement this in the code.
Does anyone have a solution?
Also, are there any examples besides those in the official Isaac Lab documentation that you would recommend for reference?

I don't understand how to implement buffer settings with PhysxSchema
2

Under whatever environment name that inherits from ManagerBasedRLEnvCfg you can set this parameter via:

self.sim.physx.gpu_max_rigid_patch_count = 1024 * 1024 * 4

For isaac reach you can find this under lift_env_cfg.py at the bottom of the file.

See line 218 +:

3

Hi. The answer of @kevinjoseph774 is instructive. U can set those parameters below in the env u create, which inherits from ManagerBasedRLEnvCfg.

At the front of the file (for example, velocity_env_cfg.py), u need to import:
from omni.isaac.lab.envs import ManagerBasedRLEnvCfg

At the class (env) u create, u need to add (for example):
class LocomotionVelocityRoughEnvCfg(ManagerBasedRLEnvCfg):
def post_init(self):
self.sim.physx.gpu_temp_buffer_capacity = 16777216
self.sim.physx.gpu_max_rigid_patch_count = 327680

Note the number needs to be changed according to ur GPU capacity.

By the way, PhysCfg lists the details of the parameters.

4

Thank you all.
I’m using Direct Workflow, can I extend the buffer in the same way?

5

You can always increase the buffer in the USD file you are trying to simulate, the parameters are on a physicsScene primitive, one can change them like this:

from pxr import PhysxSchema

physxSceneAPI = PhysxSchema.PhysxSceneAPI.Apply(physics_scene_prim)
physxSceneAPI.CreateGpuTempBufferCapacityAttr(16 * 1024 * 1024 * 2)        
physxSceneAPI.CreateGpuHeapCapacityAttr(64 * 1024 * 1024 * 2)

Regards,
Ales

6

Thank you @AlesBorovicka .
I’ll give it a try.

7

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