Because the TotalView GPU agent threads are in the same share group as are their host Linux processes, the Source view displays a unified view of lines and breakpoints set in both the host code and the GPU code. TotalView determines the equivalence of host and HIP source files by comparing the base name and directory path of each source file in the share group; if they are equal, the line number information is unified in the Source view.

This unified display is particularly visible when breakpoints are set. For example, Figure 152 shows source code before the kernel has launched. A breakpoint has been set at line 134 which slid to line 142 in the host code.

After kernel launch, Figure 153 shows that TotalView has read the line number information for the GPU image, and there is now a breakpoint corresponding to the line number in the full breakpoint expression in the Action Points tab.

Notice also that the source-line breakpoint markers for the kernel code have been unified with the CPU code. For example, lines 134 and 136-138 appeared with no bold before runtime, but after the kernel was launched, TotalView was able to identify line number symbol information there, so the line numbers now appear bold.