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Initialize input vectors to random values.

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Use smaller data blocks that can be verified visually.
Perform error checking when executing the kernel.
Wait for the command queue to finish before displaying the results.
This commit is contained in:
the_fiddler 2009-10-28 14:54:20 +00:00
parent 13a77d5452
commit fca4dde7cf
1 changed files with 17 additions and 5 deletions
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22
Source/Examples/OpenCL/VectorAdd.cs
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@ -17,7 +17,7 @@ namespace Examples
{
public static void Main()
{
const int cnBlockSize = 512;
const int cnBlockSize = 4;
const int cnBlocks = 3;
IntPtr cnDimension = new IntPtr(cnBlocks * cnBlockSize);
string sProgramSource = @"
@ -66,8 +66,12 @@ vectorAdd(__global const float * a,
float[] B = new float[cnDimension.ToInt32()];
float[] C = new float[cnDimension.ToInt32()];
// initialize host memory
// randomInit(pA, cnDimension);
//randomInit(pB, cnDimension);
Random rand = new Random();
for (int i = 0; i < A.Length; i++)
{
A[i] = rand.Next() % 256;
B[i] = rand.Next() % 256;
}
// allocate device memory
unsafe
@ -107,11 +111,19 @@ vectorAdd(__global const float * a,
new IntPtr(pB), 0, null, (IntPtr[])null);
// execute kernel
CL.EnqueueNDRangeKernel(hCmdQueue, hKernel, 1, null, &cnDimension, null, 0, null, null);
error = (ErrorCode)CL.EnqueueNDRangeKernel(hCmdQueue, hKernel, 1, null, &cnDimension, null, 0, null, null);
if (error != ErrorCode.Success)
throw new Exception(error.ToString());
// copy results from device back to host
CL.EnqueueReadBuffer(hCmdQueue, hDeviceMemC, true, IntPtr.Zero,
IntPtr event_handle = IntPtr.Zero;
error = (ErrorCode)CL.EnqueueReadBuffer(hCmdQueue, hDeviceMemC, true, IntPtr.Zero,
new IntPtr(cnDimension.ToInt32() * sizeof(float)),
new IntPtr(pC), 0, null, (IntPtr[])null);
if (error != ErrorCode.Success)
throw new Exception(error.ToString());
CL.Finish(hCmdQueue);
CL.ReleaseMemObject(hDeviceMemA);
CL.ReleaseMemObject(hDeviceMemB);