I’m receiving a couple warning pop-ups, and I can’t figure out their cause. When I first run my program in nvvp, I get the following dialog:
Dropped Invalid Data
The start and end timestamps on 5 kernels, memcpys, and other collected profile data are invalid. Those profiling records have been dropped and will not be displayed in the timeline.
Ok, I say. Then when I run Examine Kernel Performance, I get a different dialog after the program finishes:
Unable to Calculate All Metrics
Some collected events, metrics, or source-level results could not be associated with the session timeline. This may prevent event, metric and source-level results from being assigned to some kernels.
The program that I’m running is the cfd benchmark for the Rodinia benchmark suite. I’ve narrowed down the cause to one of the four kernels, cuda_compute_flux. When this kernel is not called, the pop-ups don’t occur.
-lineinfo and -arch=sm_20 are included in the compile flags.
Thank you in advance for any suggestions. Let me know if other details would help. In general, though, I don’t even know what can cause these errors – my particular context aside.