Howdy, Stranger!

It looks like you're new here. If you want to get involved, click one of these buttons!

Categories

In this Discussion

Tags in this Discussion

nsight OpenCL profiling issue
  • Vote Up0Vote Down ivanmalin
    Posts: 3
    Hi! I'm a beginner in OpenCL and would like to ask a question.
    I'm trying to get profiling information about my OpenCL app and get no success.
    Using MS VS 2010, parallel nsight 2.1 under Windows 7 x 64 with GTX 550 Ti card.
    I start new analysis activity, set its type to "Profile", experiment configuration to "Memory" and launch. But after it finishes its work, I get no information except for "Session Summary" and in the report events collection status is No Events Captured.
    How can I get all counters, statistics etc?

    P.S. Also, when I use nVidia Visual Profiler from 4.1 Toolkit, I get an error, saying "Unable to collect metric and event values" CUPTI_ERROR_PARAMETER_SIZE_NOT_SUFFICIENT
  • 5 Comments sorted by
  • Vote Up0Vote Down Rafael Campana
    Posts: 17
    Hello,

    At this moment, Nsight supports tracing of an OpenCL application (choose System Trace or Application Trace from the activity type section, and select OpenCL from the Trace Settings section). Profiling is supported for CUDA only.

    Regarding the Visual Profiler error, it sounds like an issue we need to address. We'll take a look.

    Thanks
  • Vote Up0Vote Down ivanmalin
    Posts: 3
    Ok, I'd like to provide some additional info about my profiler errors. I've reduced my kernel to a very simple one:


    __kernel void Inc( __global float* A, int N )
    {
    int i = get_global_id(0);

    if ( i < N )
    A[i] += 1;
    }

    Profiler error CUPTI_ERROR_PARAMETER_SIZE_NOT_SUFFICIENT appears when I check Global Memory Load Efficiency and Store Efficiency in Metrics Settings menu. Hope this will somehow help with localizing this problem.
  • Vote Up0Vote Down David Goodwin
    Posts: 4
    Hi,
    Can you confirm that you are using the production release of CUDA 4.1. There were some similar issues with the pre-production RC releases. Make sure you have both the production driver and toolkit available from www.nvidia.com/getcuda
  • Vote Up0Vote Down ivanmalin
    Posts: 3
    David Goodwin said:

    Hi,
    Can you confirm that you are using the production release of CUDA 4.1. There were some similar issues with the pre-production RC releases. Make sure you have both the production driver and toolkit available from www.nvidia.com/getcuda


    Yes, I have an 8.17.12.8619 driver (286.19) and Cuda 4.1.28 toolkit.
  • Vote Up0Vote Down David Goodwin
    Posts: 4
    We are having trouble reproducing your failure. Can you send the entire example so that we can run on our systems. Please send to cudatools@nvidia.com.
    It would also be helpful if you could send the output of NVIDIA Control Panel::System Information (right click on desktop background, select NVIDIA Control Panel, select System Information buttin in lower-left corner).
Add a Comment