cuda - How to start debug version of project in nsight with optirun command?

Question

I'we been writing some simple cuda program (I'm student so I need to practice), and the thing is I can compile it with nvcc from terminal (using Kubuntu 12.04LTS) and then execute it with optirun ./a.out (hardver is geforce gt 525m on dell inspiron) and everything works fine. The major problem is that I can't do anything from Nsight. When I try to start debug version of code the message is "Launch failed! Binaries not found!". I think it's about running command with optirun but I'm not sure. Any similar experiences? Thanks, for helping in advance folks. :)

Answer 1

As this was the first post I found when searching for "nsight optirun" I just wanted to wanted to write down the steps I took to make it working for me.

1. Go to Run -> Debug Configurations -> Debugger

2. Find the textbox for CUDA GDB executable (in my case it was set to "${cuda_bin}/cuda-gdb")

3. Prepend "optirun --no-xorg", in my case it was then "optirun --no-xorg ${cuda_bin}/cuda-gdb"

The "--no-xorg" option might not be required or even counterproductive if you have an OpenGL window as it prevents any of that to appear. For my scientific code however it is required as it prevents me from running into kernel timeouts.

Happy bug hunting.