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package com.mbien.opencl;
import com.mbien.opencl.CLMemory.Mem;
import com.mbien.opencl.CLMemory.Map;
import com.sun.opengl.util.BufferUtil;
import java.nio.ByteBuffer;
import org.junit.Test;
import static org.junit.Assert.*;
import static java.lang.System.*;
import static com.mbien.opencl.TestUtils.*;
import static com.sun.gluegen.runtime.BufferFactory.*;
/**
*
* @author Michael Bien
*/
public class CLBufferTest {
@Test
public void writeCopyReadBufferTest() {
out.println(" - - - highLevelTest; copy buffer test - - - ");
final int elements = NUM_ELEMENTS;
CLContext context = CLContext.create();
// the CL.MEM_* flag is probably completely irrelevant in our case since we do not use a kernel in this test
CLBuffer<ByteBuffer> clBufferA = context.createByteBuffer(elements*SIZEOF_INT, Mem.READ_ONLY);
CLBuffer<ByteBuffer> clBufferB = context.createByteBuffer(elements*SIZEOF_INT, Mem.READ_ONLY);
// fill only first read buffer -> we will copy the payload to the second later.
fillBuffer(clBufferA.buffer, 12345);
CLCommandQueue queue = context.getDevices()[0].createCommandQueue();
// asynchronous write of data to GPU device, blocking read later to get the computed results back.
queue.putWriteBuffer(clBufferA, false) // write A
.putCopyBuffer(clBufferA, clBufferB, clBufferA.buffer.capacity()) // copy A -> B
.putReadBuffer(clBufferB, true) // read B
.finish();
context.release();
out.println("validating computed results...");
checkIfEqual(clBufferA.buffer, clBufferB.buffer, elements);
out.println("results are valid");
}
@Test
public void bufferWithHostPointerTest() {
out.println(" - - - highLevelTest; host pointer test - - - ");
final int elements = NUM_ELEMENTS;
CLContext context = CLContext.create();
ByteBuffer buffer = BufferUtil.newByteBuffer(elements*SIZEOF_INT);
// fill only first read buffer -> we will copy the payload to the second later.
fillBuffer(buffer, 12345);
CLCommandQueue queue = context.getDevices()[0].createCommandQueue();
Mem[] bufferConfig = new Mem[] {Mem.COPY_BUFFER, Mem.USE_BUFFER};
for(int i = 0; i < bufferConfig.length; i++) {
out.println("testing with "+bufferConfig[i] + " config");
CLBuffer<ByteBuffer> clBufferA = context.createBuffer(buffer, Mem.READ_ONLY, bufferConfig[i]);
CLBuffer<ByteBuffer> clBufferB = context.createByteBuffer(elements*SIZEOF_INT, Mem.READ_ONLY);
// asynchronous write of data to GPU device, blocking read later to get the computed results back.
queue.putCopyBuffer(clBufferA, clBufferB, clBufferA.buffer.capacity()) // copy A -> B
.putReadBuffer(clBufferB, true) // read B
.finish();
assertEquals(2, context.getMemoryObjects().size());
clBufferA.release();
assertEquals(1, context.getMemoryObjects().size());
clBufferB.release();
assertEquals(0, context.getMemoryObjects().size());
// uploading worked when a==b.
out.println("validating computed results...");
checkIfEqual(clBufferA.buffer, clBufferB.buffer, elements);
out.println("results are valid");
}
context.release();
}
@Test
public void mapBufferTest() {
out.println(" - - - highLevelTest; map buffer test - - - ");
final int elements = NUM_ELEMENTS;
final int sizeInBytes = elements*SIZEOF_INT;
CLContext context;
CLBuffer<?> clBufferA;
CLBuffer<?> clBufferB;
// We will have to allocate mappable NIO memory on non CPU contexts
// since we can't map e.g GPU memory.
if(CLPlatform.getDefault().listCLDevices(CLDevice.Type.CPU).length > 0) {
context = CLContext.create(CLDevice.Type.CPU);
clBufferA = context.createBuffer(sizeInBytes, Mem.READ_WRITE);
clBufferB = context.createBuffer(sizeInBytes, Mem.READ_WRITE);
}else{
context = CLContext.create();
clBufferA = context.createByteBuffer(sizeInBytes, Mem.READ_WRITE, Mem.USE_BUFFER);
clBufferB = context.createByteBuffer(sizeInBytes, Mem.READ_WRITE, Mem.USE_BUFFER);
}
CLCommandQueue queue = context.getDevices()[0].createCommandQueue();
// fill only first buffer -> we will copy the payload to the second later.
ByteBuffer mappedBufferA = queue.putMapBuffer(clBufferA, Map.READ_WRITE, true);
assertEquals(sizeInBytes, mappedBufferA.capacity());
fillBuffer(mappedBufferA, 12345); // write to A
queue.putUnmapMemory(clBufferA) // unmap A
.putCopyBuffer(clBufferA, clBufferB); // copy A -> B
// map B for read operations
ByteBuffer mappedBufferB = queue.putMapBuffer(clBufferB, Map.READ, true);
assertEquals(sizeInBytes, mappedBufferB.capacity());
out.println("validating computed results...");
checkIfEqual(mappedBufferA, mappedBufferB, elements); // A == B ?
out.println("results are valid");
queue.putUnmapMemory(clBufferB); // unmap B
context.release();
}
}
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