Set breakpoints in GPU code before you start the process. If you start the process without setting any breakpoints, there are no prompts to set them afterward.

Note that breakpoints set in GPU code will slide to the next host (CPU) line in the source file, but once the program is running and the GPU code is loaded, TotalView recalculates the breakpoint expression and plants a breakpoint at the proper location in the GPU code. (See Sliding Breakpoints.)

Note that breakpoints set in GPU source code might slide to a host source line that is executed before the GPU code is loaded; thus, the process might unexpectedly stop at that line before it stops in the GPU kernel.