private static String readFile(String fName) {
StringBuffer sb = new StringBuffer();
try {
// Scanner sc = new Scanner(new File(fName));
Scanner sc = new Scanner(CLAZZ.getResourceAsStream(fName));
while (sc.hasNext()) sb.append(sc.nextLine());
sc.close();
} catch (Exception e) {
Logger.logError(CLAZZ, "Could not read file: " + fName);
e.printStackTrace();
}
return sb.toString();
}
private static void initCL(CLDevice.Type clType) throws Exception {
/** * Hole OpenCL-Plattformen z.B. AMD APP, NVIDIA CUDA ** */
platforms = JavaCL.listPlatforms();
/** * Hole OpenCL-Device des geforderten Typs z.B. GPU, CPU ** */
EnumSet<CLDevice.Type> types = EnumSet.of(clType);
devices = new ArrayList<CLDevice>();
CLDevice[] devTmp;
for (CLPlatform platform : platforms) {
devTmp = platform.listDevices(types, true);
devices.addAll(Arrays.asList(devTmp));
}
/** * Erstelle OpenCL-Context und CommandQueue ** */
devTmp = new CLDevice[devices.size()];
context = JavaCL.createContext(null, devices.toArray(devTmp));
cmdQ = context.createDefaultQueue(QueueProperties.ProfilingEnable);
/** * OpenCL-Quellcode einlesen ** */
String src = readFile(KERNEL_PATH);
// String src = KERNEL_SRC;
/** * OpenCL-Programm aus Quellcode erstellen ** */
program = context.createProgram(src);
try {
program.build();
} catch (CLBuildException err) {
Logger.logError(CLAZZ, "Build log for \"" + devices.get(0) + "\n" + err.getMessage());
throw err;
}
/** * OpenCL-Kernel laden ** */
kernel = program.createKernel("addVec");
}
public static synchronized boolean addVec(
CLDevice.Type clType, int[] vecC, int[] vecA, int[] vecB) {
try {
if ((Logger.getLogMask() & Level.DEFAULT.DEBUG.getLevel().getValue())
== Level.DEFAULT.DEBUG.getLevel().getValue()) {
Logger.logDebug(CLAZZ, "addVec() vecA: " + Convert.toString(vecA));
Logger.logDebug(CLAZZ, "addVec() vecB: " + Convert.toString(vecB));
}
/** * Initialisiere OpenCL-Objekte ** */
initCL(clType);
/** * Ausgabe von Informationen ueber gewaehltes OpenCL-Device ** */
Logger.logInfo(CLAZZ, "max compute units: " + devices.get(0).getMaxComputeUnits());
Logger.logInfo(CLAZZ, "max work group sizes: " + devices.get(0).getMaxWorkGroupSize());
Logger.logInfo(
CLAZZ, "max global mem size (KB): " + devices.get(0).getGlobalMemSize() / 1024);
Logger.logInfo(CLAZZ, "max local mem size (KB): " + devices.get(0).getLocalMemSize() / 1024);
/** * Erstellen und Vorbereiten der Daten ** */
IntBuffer tmpBuffer =
ByteBuffer.allocateDirect(vecA.length * Integer.SIZE)
.order(context.getByteOrder())
.asIntBuffer();
tmpBuffer.put(vecA);
CLBuffer<IntBuffer> aBuffer = context.createBuffer(CLMem.Usage.Input, tmpBuffer, true);
tmpBuffer.clear();
tmpBuffer.put(vecB);
CLBuffer<IntBuffer> bBuffer = context.createBuffer(CLMem.Usage.Input, tmpBuffer, true);
CLBuffer<IntBuffer> cBuffer =
context.createBuffer(CLMem.Usage.Output, vecC.length, IntBuffer.class);
/** * Kernel-Argumente setzen ** */
kernel.setArg(0, cBuffer);
kernel.setArg(1, aBuffer);
kernel.setArg(2, bBuffer);
kernel.setArg(3, vecC.length);
/** * Kernel ausfuehren und auf Abarbeitung warten ** */
CLEvent event = kernel.enqueueNDRange(cmdQ, new int[] {vecC.length}, new CLEvent[0]);
event.waitFor();
cmdQ.finish();
/** * Daten vom OpenCL-Device holen ** */
cBuffer.read(cmdQ, tmpBuffer, true, new CLEvent[0]);
tmpBuffer.clear();
tmpBuffer.get(vecC);
if ((Logger.getLogMask() & Level.DEFAULT.DEBUG.getLevel().getValue())
== Level.DEFAULT.DEBUG.getLevel().getValue()) {
Logger.logDebug(CLAZZ, "addVec() vecC: " + Convert.toString(vecC));
}
} catch (CLException err) {
Logger.logError(CLAZZ, "OpenCL error:\n" + err.getMessage() + "():" + err.getCode());
err.printStackTrace();
return EXIT_FAILURE;
} catch (Exception err) {
Logger.logError(CLAZZ, "Error:\n" + err.getMessage() + "()");
err.printStackTrace();
return EXIT_FAILURE;
}
return EXIT_SUCCESS;
}