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package com.mbien.opencl;
import com.mbien.opencl.CLMemory.Mem;
import java.io.IOException;
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 CLConcurrencyTest {
@Test
public void testEvents() throws IOException {
out.println(" - - - event synchronization test - - - ");
final int groupSize = 256;
final int elements = roundUp(groupSize, ONE_MB/SIZEOF_INT * 5); // 5MB per buffer
CLContext context = CLContext.create();
CLBuffer<ByteBuffer> clBufferA = context.createByteBuffer(elements*SIZEOF_INT, Mem.READ_ONLY);
CLBuffer<ByteBuffer> clBufferB = context.createByteBuffer(elements*SIZEOF_INT, Mem.READ_ONLY);
CLBuffer<ByteBuffer> clBufferC = context.createByteBuffer(elements*SIZEOF_INT, Mem.READ_ONLY);
CLBuffer<ByteBuffer> clBufferD = context.createByteBuffer(elements*SIZEOF_INT, Mem.READ_ONLY);
fillBuffer(clBufferA.buffer, 12345);
fillBuffer(clBufferB.buffer, 67890);
CLProgram program = context.createProgram(getClass().getResourceAsStream("testkernels.cl")).build();
CLKernel vectorAddKernel = program.createCLKernel("VectorAddGM")
.setArg(3, elements);
CLCommandQueue queue = context.getCLDevices()[0].createCommandQueue();
final CLEventList events = new CLEventList(2);
assertEquals(0, events.size());
queue.putWriteBuffer(clBufferA, false, events) // write A
.putWriteBuffer(clBufferB, false, events); // write B
assertEquals(2, events.size());
queue.putWaitForEvents(events, true);
events.release();
assertEquals(0, events.size());
vectorAddKernel.setArgs(clBufferA, clBufferB, clBufferC); // C = A+B
queue.put1DRangeKernel(vectorAddKernel, 0, elements, groupSize, events);
vectorAddKernel.setArgs(clBufferA, clBufferB, clBufferD); // D = A+B
queue.put1DRangeKernel(vectorAddKernel, 0, elements, groupSize, events);
assertEquals(2, events.size());
queue.putWaitForEvent(events, 0, false)
.putWaitForEvent(events, 1, true);
queue.putReadBuffer(clBufferC, false)
.putReadBuffer(clBufferD, true);
events.release();
checkIfEqual(clBufferC.buffer, clBufferD.buffer, elements);
context.release();
out.println("results are valid");
}
@Test
public void concurrencyTest() throws IOException, InterruptedException {
out.println(" - - - QueueBarrier test - - - ");
final int elements = ONE_MB/SIZEOF_INT * 10; // 20MB per buffer
CLContext context = CLContext.create();
CLDevice[] devices = context.getCLDevices();
if(devices.length < 2) {
out.println("aborting test... need at least 2 devices");
context.release();
return;
}
final CLBuffer<ByteBuffer> clBufferC = context.createByteBuffer(elements*SIZEOF_INT, Mem.READ_ONLY);
final CLBuffer<ByteBuffer> clBufferD = context.createByteBuffer(elements*SIZEOF_INT, Mem.READ_ONLY);
final CLBuffer<ByteBuffer> clBufferA1 = context.createByteBuffer(elements*SIZEOF_INT, Mem.READ_ONLY);
final CLBuffer<ByteBuffer> clBufferB1 = context.createByteBuffer(elements*SIZEOF_INT, Mem.READ_ONLY);
final CLBuffer<ByteBuffer> clBufferA2 = context.createByteBuffer(elements*SIZEOF_INT, Mem.READ_ONLY);
final CLBuffer<ByteBuffer> clBufferB2 = context.createByteBuffer(elements*SIZEOF_INT, Mem.READ_ONLY);
CLProgram program = context.createProgram(getClass().getResourceAsStream("testkernels.cl")).build();
final CLKernel vectorAddKernel1 = program.createCLKernel("VectorAddGM")
.setArg(3, elements);
final CLKernel vectorAddKernel2 = program.createCLKernel("VectorAddGM")
.setArg(3, elements);
int secondDevice = devices.length > 1 ? 1 : 0;
final CLCommandQueue queue1 = devices[0 ].createCommandQueue();
final CLCommandQueue queue2 = devices[secondDevice].createCommandQueue();
if(secondDevice > 0)
System.out.println("using two devices");
final QueueBarrier barrier = new QueueBarrier(2);
Thread thread1 = new Thread("C") {
@Override
public void run() {
fillBuffer(clBufferA1.buffer, 12345);
fillBuffer(clBufferB1.buffer, 67890);
// System.out.println("C buffer");
queue1.putWriteBuffer(clBufferA1, false) // write A
.putWriteBuffer(clBufferB1, true); // write B
// System.out.println("C args");
vectorAddKernel1.setArgs(clBufferA1, clBufferB1, clBufferC); // C = A+B
// System.out.println("C kernels");
CLEventList events1 = new CLEventList(2);
queue1.put1DRangeKernel(vectorAddKernel1, 0, elements, 256, events1)
.putReadBuffer(clBufferC, false, events1);
barrier.waitFor(queue1, events1);
}
};
Thread thread2 = new Thread("D") {
@Override
public void run() {
fillBuffer(clBufferA2.buffer, 12345);
fillBuffer(clBufferB2.buffer, 67890);
// System.out.println("D buffer");
queue2.putWriteBuffer(clBufferA2, false) // write A
.putWriteBuffer(clBufferB2, true); // write B
// System.out.println("D args");
vectorAddKernel2.setArgs(clBufferA2, clBufferB2, clBufferD); // D = A+B
// System.out.println("D kernels");
CLEventList events2 = new CLEventList(2);
queue2.put1DRangeKernel(vectorAddKernel2, 0, elements, 256, events2)
.putReadBuffer(clBufferD, false, events2);
barrier.waitFor(queue2, events2);
}
};
out.println("starting threads");
thread1.start();
thread2.start();
barrier.await();
out.println("done");
checkIfEqual(clBufferC.buffer, clBufferD.buffer, elements);
context.release();
// vectorAddKernel2.release();
out.println("results are valid");
}
}
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