OpenGL Interoperability problem (CUDA2.3) shouldn't call glBufferData after cudaGLRegisterBuffer

Accelerated Computing CUDA CUDA Programming and Performance
1

in our CUDA-Enabled application, we use OpenGL VBO to pass data between CUDA kernel and OpenGL rendering. with CUDA2.2 driver, the following code run smoothly.

...

unsigned int vbo;

unsigned int size = 1024;

glGenBuffersARB(1, &vbo);

//claim vbo size, but pass null data.

glBufferDataARB(GL_ARRAY_BUFFER_ARB, size ,  NULL, GL_DYNAMIC_DRAW_ARB);

//register vbo to CUDA first

cudaGLRegisterBufferObject(vbo);

...

//fill vbo with real data later on

glBindBufferARB(GL_ARRAY_BUFFER_ARB, vbo);

glBufferSubDataARB(GL_ARRAY_BUFFER_ARB, realdata);

glBindBufferARB(GL_ARRAY_BUFFER_ARB, 0);

...

But it did introduce potential problem under CUDA2.3 and corrupted the following calls to cudaMalloc/cudaMemcpy.

we fixed this problem by moving glBufferSubDataARB before cudaGLRegisterBufferObject.

CUDA Progamming guide hasn’t metioned the order of these operations, so I assume this is CUDA internal bug.

regards,

-Jacques