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authorMichael Bien <[email protected]>2009-11-06 03:17:16 +0100
committerMichael Bien <[email protected]>2009-11-06 03:17:16 +0100
commit927ba4bbd684ad66da1da416562830af58d2cf57 (patch)
tree1b8c6f82dde07ca800ccc26af3b251d6576bd5ca /src/com/mbien/opencl/demos/hellojocl
parente6e94ab1c51654355c0df27a505c18bfe77fdc80 (diff)
changes due to api refactorings.
Diffstat (limited to 'src/com/mbien/opencl/demos/hellojocl')
-rw-r--r--src/com/mbien/opencl/demos/hellojocl/HelloJOCL.java23
1 files changed, 11 insertions, 12 deletions
diff --git a/src/com/mbien/opencl/demos/hellojocl/HelloJOCL.java b/src/com/mbien/opencl/demos/hellojocl/HelloJOCL.java
index 58cb5e9..aec01e2 100644
--- a/src/com/mbien/opencl/demos/hellojocl/HelloJOCL.java
+++ b/src/com/mbien/opencl/demos/hellojocl/HelloJOCL.java
@@ -6,7 +6,7 @@ import com.mbien.opencl.CLContext;
import com.mbien.opencl.CLKernel;
import com.mbien.opencl.CLProgram;
import java.io.IOException;
-import java.nio.ByteBuffer;
+import java.nio.FloatBuffer;
import java.util.Random;
import static java.lang.System.*;
@@ -33,12 +33,12 @@ public class HelloJOCL {
CLProgram program = context.createProgram(HelloJOCL.class.getResourceAsStream("VectorAdd.cl")).build();
- CLBuffer<ByteBuffer> clBufferA = context.createBuffer(globalWorkSize*SIZEOF_FLOAT, READ_ONLY);
- CLBuffer<ByteBuffer> clBufferB = context.createBuffer(globalWorkSize*SIZEOF_FLOAT, READ_ONLY);
- CLBuffer<ByteBuffer> clBufferC = context.createBuffer(globalWorkSize*SIZEOF_FLOAT, WRITE_ONLY);
+ 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.buffer.capacity()+clBufferB.buffer.capacity()+clBufferC.buffer.capacity())/1000000 +"MB");
+ + (clBufferA.buffer.capacity()+clBufferB.buffer.capacity()+clBufferC.buffer.capacity())*4/1000000 +"MB");
// fill read buffers with random numbers (just to have test data; seed is fixed -> results will not change between runs).
fillBuffer(clBufferA.buffer, 12345);
@@ -51,16 +51,15 @@ public class HelloJOCL {
.setArg(2, clBufferC)
.setArg(3, elementCount);
- // create command queue on first device.
- CLCommandQueue queue = context.getCLDevices()[0].createCommandQueue();
+ // 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)
.putNDRangeKernel(kernel, 1, 0, globalWorkSize, localWorkSize)
- .putReadBuffer(clBufferC, true)
- .finish();
+ .putReadBuffer(clBufferC, true);
time = nanoTime() - time;
// cleanup all resources associated with this context.
@@ -69,17 +68,17 @@ public class HelloJOCL {
// 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.buffer.getFloat() + ", ");
+ out.print(clBufferC.buffer.get() + ", ");
out.println("...; " + clBufferC.buffer.remaining()/SIZEOF_FLOAT + " more");
out.println("computation took: "+(time/1000000)+"ms");
}
- private static final void fillBuffer(ByteBuffer buffer, int seed) {
+ private static final void fillBuffer(FloatBuffer buffer, int seed) {
Random rnd = new Random(seed);
while(buffer.remaining() != 0)
- buffer.putFloat(rnd.nextFloat()*100);
+ buffer.put(rnd.nextFloat()*100);
buffer.rewind();
}