Enabling CUDA MemoryChecker Feature

Totalview® for HPC User Guide : PART V Using the CUDA Debugger : Chapter 26 CUDA Debugging Tutorial : Enabling CUDA MemoryChecker Feature

You can detect global memory addressing violations and misaligned global memory accesses by enabling the CUDA MemoryChecker feature.

To enable the feature, use one of the following:

• Select "Enable CUDA memory checking" from the Startup Parameters dialog box in TotalView, as shown in Figure 267.

Figure 267 – Enabling CUDA memory checking from TotalView Startup Parameters

• Pass the -cuda_memcheck option to the totalview command.

• Set the TV::cuda_memcheck CLI state variable to true. For example:

dset TV::cuda_memcheck true

Note that global memory violations and misaligned global memory accesses will be detected only while the CUDA thread is running. Detection will not happen when single-stepping the CUDA thread.