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authorMichael Bien <[email protected]>2010-04-12 22:27:03 +0200
committerMichael Bien <[email protected]>2010-04-12 22:27:03 +0200
commit2c85c416d85205ab98b33e1a0b0daab32d4d81ff (patch)
tree4187ba06dec81da46495a300bb4f914e931f0c58 /src/com/mbien/opencl/demos/hellojocl
parentb51f2e1c254cdd74c9e43904c62694f64e6ae7e6 (diff)
changes due to package renaming in jocl.
Diffstat (limited to 'src/com/mbien/opencl/demos/hellojocl')
-rw-r--r--src/com/mbien/opencl/demos/hellojocl/HelloJOCL.java91
-rw-r--r--src/com/mbien/opencl/demos/hellojocl/VectorAdd.cl15
2 files changed, 0 insertions, 106 deletions
diff --git a/src/com/mbien/opencl/demos/hellojocl/HelloJOCL.java b/src/com/mbien/opencl/demos/hellojocl/HelloJOCL.java
deleted file mode 100644
index acbd84c..0000000
--- a/src/com/mbien/opencl/demos/hellojocl/HelloJOCL.java
+++ /dev/null
@@ -1,91 +0,0 @@
-package com.mbien.opencl.demos.hellojocl;
-
-import com.mbien.opencl.CLBuffer;
-import com.mbien.opencl.CLCommandQueue;
-import com.mbien.opencl.CLContext;
-import com.mbien.opencl.CLKernel;
-import com.mbien.opencl.CLProgram;
-import java.io.IOException;
-import java.nio.FloatBuffer;
-import java.util.Random;
-
-import static java.lang.System.*;
-import static com.mbien.opencl.CLMemory.Mem.*;
-
-/**
- * Hello Java OpenCL example. Adds all elements of buffer A to buffer B
- * and stores the result in buffer C.<br/>
- * Sample was inspired by the Nvidia VectorAdd example written in C/C++
- * which is bundled in the Nvidia OpenCL SDK.
- * @author Michael Bien
- */
-public class HelloJOCL {
-
- public static void main(String[] args) throws IOException {
-
- int elementCount = 11444777; // Length of arrays to process
- int localWorkSize = 256; // Local work size dimensions
- int globalWorkSize = roundUp(localWorkSize, elementCount); // rounded up to the nearest multiple of the localWorkSize
-
- // set up
- CLContext context = CLContext.create();
-
- CLProgram program = context.createProgram(HelloJOCL.class.getResourceAsStream("VectorAdd.cl")).build();
-
- CLBuffer<FloatBuffer> clBufferA = context.createFloatBuffer(globalWorkSize, READ_ONLY);
- CLBuffer<FloatBuffer> clBufferB = context.createFloatBuffer(globalWorkSize, READ_ONLY);
- CLBuffer<FloatBuffer> clBufferC = context.createFloatBuffer(globalWorkSize, WRITE_ONLY);
-
- out.println("used device memory: "
- + (clBufferA.getSize()+clBufferB.getSize()+clBufferC.getSize())/1000000 +"MB");
-
- // fill read buffers with random numbers (just to have test data; seed is fixed -> results will not change between runs).
- fillBuffer(clBufferA.getBuffer(), 12345);
- fillBuffer(clBufferB.getBuffer(), 67890);
-
- // get a reference to the kernel functon with the name 'VectorAdd'
- // and map the buffers to its input parameters.
- CLKernel kernel = program.createCLKernel("VectorAdd");
- kernel.putArgs(clBufferA, clBufferB, clBufferC).putArg(elementCount);
-
- // create command queue on fastest device.
- CLCommandQueue queue = context.getMaxFlopsDevice().createCommandQueue();
-
- // asynchronous write of data to GPU device, blocking read later to get the computed results back.
- long time = nanoTime();
- queue.putWriteBuffer(clBufferA, false)
- .putWriteBuffer(clBufferB, false)
- .put1DRangeKernel(kernel, 0, globalWorkSize, localWorkSize)
- .putReadBuffer(clBufferC, true);
- time = nanoTime() - time;
-
- // cleanup all resources associated with this context.
- context.release();
-
- // print first few elements of the resulting buffer to the console.
- out.println("a+b=c results snapshot: ");
- for(int i = 0; i < 10; i++)
- out.print(clBufferC.getBuffer().get() + ", ");
- out.println("...; " + clBufferC.getBuffer().remaining() + " more");
-
- out.println("computation took: "+(time/1000000)+"ms");
-
- }
-
- private static final void fillBuffer(FloatBuffer buffer, int seed) {
- Random rnd = new Random(seed);
- while(buffer.remaining() != 0)
- buffer.put(rnd.nextFloat()*100);
- buffer.rewind();
- }
-
- private static final int roundUp(int groupSize, int globalSize) {
- int r = globalSize % groupSize;
- if (r == 0) {
- return globalSize;
- } else {
- return globalSize + groupSize - r;
- }
- }
-
-} \ No newline at end of file
diff --git a/src/com/mbien/opencl/demos/hellojocl/VectorAdd.cl b/src/com/mbien/opencl/demos/hellojocl/VectorAdd.cl
deleted file mode 100644
index ac9dde2..0000000
--- a/src/com/mbien/opencl/demos/hellojocl/VectorAdd.cl
+++ /dev/null
@@ -1,15 +0,0 @@
-
- // OpenCL Kernel Function for element by element vector addition
- kernel void VectorAdd(global const float* a, global const float* b, global float* c, int numElements) {
-
- // get index into global data array
- int iGID = get_global_id(0);
-
- // bound check (equivalent to the limit on a 'for' loop for standard/serial C code
- if (iGID >= numElements) {
- return;
- }
-
- // add the vector elements
- c[iGID] = a[iGID] + b[iGID];
- } \ No newline at end of file