CPU threads and CUDA contexts

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C#

Hi,

I want to use GPU by too many threads (CPU threads).When I load modules by once thread and call "EnableMultithreading()" method then call a GPU module's by another thread a "ErrorInvalidContext" exception accrued. (My system has only one GPU)

Here is my simply code:

class Worker
  {
    public GPGPU gpu { get; set; }
    public int TID { get; set; }
    public void test(object stateObject)
    {
      int[] dev0 = gpu.Allocate<int>(512);
      int gridSize = 1;
      int blockSize = 512;
      gpu.Launch(gridSize, blockSize, "aaa", dev0);
      int[] host0 = new int[512];
      gpu.CopyFromDevice<int>(dev0, host0);
      gpu.FreeAll();

      Console.WriteLine(TID + " thread done.");

      Console.ReadKey();
    }
  }

  class Program
  {
    static void Main(string[] args)
    {
      GPGPU gpu = CudafyHost.GetDevice();
      CudafyModule module = CudafyModule.TryDeserialize();
      if (module == null || !module.TryVerifyChecksums())
      {
        module = CudafyTranslator.Cudafy();
        module.Serialize();
      }
      if (!gpu.IsModuleLoaded(module.Name))
      {
        gpu.LoadModule(module);
      }
      if (!gpu.IsMultithreadingEnabled)
      {
        gpu.EnableMultithreading();
      }
      

      List<Thread> threadArray = new List<Thread>();
      for (int i = 0; i < 10; i++)
      {
        Worker w = new Worker() { gpu = gpu, TID=i };
        Thread t = new Thread(w.test);
        t.Start();
        threadArray.Add(t);
      }
    }

    [Cudafy]
    public static void aaa(GThread thread, int[] a)
    {
      int tid = thread.threadIdx.x;
      a[tid] = 1;
    }

Please guide me how to use GPU by multithreads.

Thank you!
Zollie