Different result with concurrent kernel displayed in timeline

Developer Tools Nsight Visual Studio Edition
1

When I used Nsight to profile my practice of concurrent kernel, independent kernel not overlap. But it works fine with nvvp, I don’t know is it a bug?

Nsight ScreenShot: [url]http://i.imgur.com/Pzcht22.png?1[/url]

1653×620 42.9 KB

Visual Profiler Screenshot: [url]http://i.imgur.com/11OWrVQ.png[/url]
1345×782 43.6 KB

SystemInfo

  1. Display Info: Geforce GTX 660 Ti / Driver: 327.23
  2. CUDA toolkit: 5.5
  3. Nsight 3.2.0.13289 / CUDA Kernel Trace Mode already set to “Concurrent”
  4. Visual Profiler: 5.5.0
  5. IDE: visual studio 2010 4.0.30319
2

Hi,

Which application is that? Is it using the exact same sources?
What about the GPU, is it the same when you used the Visual Profiler vs Nsight VSE?

3

→ The result of profiling created by my own program,
but got the same result if profiling CUDA Sample - concurrent kernel.

→ Yes, I use exact the same source to profile with Nsight and Visual Profiler

→ I have only one display card on my PC (GTX 660 Ti), so the answer is the same.

Thanks for your response.

4

Thanks for the info.
Is there any way I could get a hold of your project?

5

Hi rafi

To give you my project is OK, but I don’t know why?
If I open the project of CUDA Sample (concurrent kernel) and use Nsight to profile it,
then time line shows that kernels running serially.

6

Hi flysnow,

I’ve sent you a private message with instructions on sending your project to us. We will try to reproduce the issue you are seeing.

Thanks,

-Jeff