TK1 freezes on cudaDeviceSynchronize

Robotics & Edge Computing Jetson Systems Jetson TK1
1

We’ve posted a stackoverflow question for this issue here:

http://stackoverflow.com/questions/34642489/tk1-freezes-on-cudadevicesynchronize

In short:

I am trying to test two methods of allocating data on a TK1 Tegra: zero-copy and cudaMallocManaged(). I’m allocating, calling a kernel, synchronizing, and freeing in a loop. The problem is that the loop hangs.

When cudaDeviceSynchronize() is commented out, everything finishes. The loop also doesn’t hang if stepped through with gdb. It also does not hang if I allocate on host and device and copy back and forth (as in normal procedure for non-shared memory space).

So this seems like some sort of race condition, and we’re not sure how to proceed.

Thanks in advance.

2

Hi AaronMS,
Thanks for reporting the issue, we are currently investigating the case and we’ll let you know when we have an update.

Cheers.

3

Hi AaronMs,
Could you provude a built application that can help to reproduces the issue easily?

Thanks