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package com.mbien.opencl;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import java.util.Arrays;
import org.junit.BeforeClass;
import org.junit.Test;
import static org.junit.Assert.*;
import static java.lang.System.*;
/**
* Test for testing basic functionality.
* @author Michael Bien
*/
public class JOCLTest {
public JOCLTest() {
}
@BeforeClass
public static void setUpClass() throws Exception {
out.println("OS: " + System.getProperty("os.name"));
out.println("VM: " + System.getProperty("java.vm.name"));
}
@Test
public void lowLevelTest1() {
out.println(" - - - lowLevelTest; contextless binding - - - ");
int ret = CL.CL_SUCCESS;
CL cl = CLContext.getLowLevelBinding();
int[] intBuffer = new int[1];
// find all available OpenCL platforms
ret = cl.clGetPlatformIDs(0, null, 0, intBuffer, 0);
checkForError(ret);
out.println("#platforms: "+intBuffer[0]);
long[] platformId = new long[intBuffer[0]];
ret = cl.clGetPlatformIDs(platformId.length, platformId, 0, null, 0);
checkForError(ret);
// print platform info
long[] longBuffer = new long[1];
ByteBuffer bb = ByteBuffer.allocate(128);
bb.order(ByteOrder.nativeOrder());
for (int i = 0; i < platformId.length; i++) {
long platform = platformId[i];
out.println("platform id: "+platform);
ret = cl.clGetPlatformInfo(platform, CL.CL_PLATFORM_PROFILE, bb.capacity(), bb, longBuffer, 0);
checkForError(ret);
out.println(" profile: "+new String(bb.array(), 0, (int)longBuffer[0]));
ret = cl.clGetPlatformInfo(platform, CL.CL_PLATFORM_VERSION, bb.capacity(), bb, longBuffer, 0);
checkForError(ret);
out.println(" version: "+new String(bb.array(), 0, (int)longBuffer[0]));
ret = cl.clGetPlatformInfo(platform, CL.CL_PLATFORM_NAME, bb.capacity(), bb, longBuffer, 0);
checkForError(ret);
out.println(" name: "+new String(bb.array(), 0, (int)longBuffer[0]));
ret = cl.clGetPlatformInfo(platform, CL.CL_PLATFORM_VENDOR, bb.capacity(), bb, longBuffer, 0);
checkForError(ret);
out.println(" vendor: "+new String(bb.array(), 0, (int)longBuffer[0]));
//find all devices
ret = cl.clGetDeviceIDs(platform, CL.CL_DEVICE_TYPE_ALL, 0, null, 0, intBuffer, 0);
checkForError(ret);
out.println("#devices: "+intBuffer[0]);
long[] devices = new long[intBuffer[0]];
ret = cl.clGetDeviceIDs(platform, CL.CL_DEVICE_TYPE_ALL, devices.length, devices, 0, null, 0);
//print device info
for (int j = 0; j < devices.length; j++) {
long device = devices[j];
ret = cl.clGetDeviceInfo(device, CL.CL_DEVICE_NAME, bb.capacity(), bb, longBuffer, 0);
checkForError(ret);
out.println(" device: "+new String(bb.array(), 0, (int)longBuffer[0]));
ret = cl.clGetDeviceInfo(device, CL.CL_DEVICE_TYPE, bb.capacity(), bb, longBuffer, 0);
checkForError(ret);
out.println(" type: " + CLDevice.Type.valueOf(bb.get()));
bb.rewind();
}
}
}
@Test
public void lowLevelTest2() {
out.println(" - - - lowLevelTest2; VectorAdd kernel - - - ");
// CreateContextCallback cb = new CreateContextCallback() {
// @Override
// public void createContextCallback(String errinfo, ByteBuffer private_info, long cb, Object user_data) {
// throw new RuntimeException("not yet implemented...");
// }
// };
long[] longBuffer = new long[1];
ByteBuffer bb = ByteBuffer.allocate(1024);
bb.order(ByteOrder.nativeOrder());
CL cl = CLContext.getLowLevelBinding();
int ret = CL.CL_SUCCESS;
int[] intArray = new int[1];
long context = cl.clCreateContextFromType(null, 0, CL.CL_DEVICE_TYPE_ALL, null, null, null, 0);
out.println("context handle: "+context);
// TODO fix gluegen bug: array-buffer mixing... bb is a noop
ret = cl.clGetContextInfo(context, CL.CL_CONTEXT_DEVICES, 0, bb, longBuffer, 0);
checkError("on clGetContextInfo", ret);
int sizeofLong = 8; // TODO sizeof long...
out.println("context created with " + longBuffer[0]/sizeofLong + " devices");
ret = cl.clGetContextInfo(context, CL.CL_CONTEXT_DEVICES, bb.capacity(), bb, null, 0);
checkError("on clGetContextInfo", ret);
for (int i = 0; i < longBuffer[0]/sizeofLong; i++) {
out.println("device id: "+bb.getLong());
}
long firstDeviceID = bb.getLong(0);
// Create a command-queue
long commandQueue = cl.clCreateCommandQueue(context, firstDeviceID, 0, intArray, 0);
checkError("on clCreateCommandQueue", intArray[0]);
int iNumElements = 11444777; // Length of float arrays to process (odd # for illustration)
int szLocalWorkSize = 256; // set and log Global and Local work size dimensions
int szGlobalWorkSize = roundUp(szLocalWorkSize, iNumElements); // rounded up to the nearest multiple of the LocalWorkSize
int sizeofFloat = 4; // TODO sizeof float ...
// Allocate the OpenCL buffer memory objects for source and result on the device GMEM
long cmDevSrcA = cl.clCreateBuffer(context, CL.CL_MEM_READ_ONLY, sizeofFloat * szGlobalWorkSize, null, intArray, 0);
checkError("on clCreateBuffer", intArray[0]);
long cmDevSrcB = cl.clCreateBuffer(context, CL.CL_MEM_READ_ONLY, sizeofFloat * szGlobalWorkSize, null, intArray, 0);
checkError("on clCreateBuffer", intArray[0]);
long cmDevDst = cl.clCreateBuffer(context, CL.CL_MEM_WRITE_ONLY, sizeofFloat * szGlobalWorkSize, null, intArray, 0);
checkError("on clCreateBuffer", intArray[0]);
String src =
" // OpenCL Kernel Function for element by element vector addition \n"
+ "__kernel void VectorAdd(__global const float* a, __global const float* b, __global float* c, int iNumElements) { \n"
+ " // get index into global data array \n"
+ " int iGID = get_global_id(0); \n"
+ " // bound check (equivalent to the limit on a 'for' loop for standard/serial C code \n"
+ " if (iGID >= iNumElements) { \n"
+ " return; \n"
+ " } \n"
+ " // add the vector elements \n"
+ " c[iGID] = a[iGID] + b[iGID]; \n"
+ "} \n";
// Create the program
long program = cl.clCreateProgramWithSource(context, 1, new String[] {src}, new long[]{src.length()}, 0, intArray, 0);
checkError("on clCreateProgramWithSource", intArray[0]);
// Build the program
ret = cl.clBuildProgram(program, new long[] { firstDeviceID }, null, null, null);
checkError("on clBuildProgram", ret);
// Check program status
Arrays.fill(longBuffer, 42);
bb.rewind();
ret = cl.clGetProgramBuildInfo(program, firstDeviceID, CL.CL_PROGRAM_BUILD_STATUS, bb.capacity(), bb, null, 0);
checkError("on clGetProgramBuildInfo1", ret);
out.println("program build status: " + getBuildStatus(bb.getInt(0)));
assertEquals("build status", CL.CL_BUILD_SUCCESS, bb.getInt(0));
// Read build log
// TODO fix gluegen bug: array-buffer mixing... bb is a noop
ret = cl.clGetProgramBuildInfo(program, firstDeviceID, CL.CL_PROGRAM_BUILD_LOG, 0, bb, longBuffer, 0);
checkError("on clGetProgramBuildInfo2", ret);
out.println("program log length: " + longBuffer[0]);
bb.rewind();
ret = cl.clGetProgramBuildInfo(program, firstDeviceID, CL.CL_PROGRAM_BUILD_LOG, bb.capacity(), bb, null, 0);
checkError("on clGetProgramBuildInfo3", ret);
out.println("log:\n" + new String(bb.array(), 0, (int)longBuffer[0]));
// Create the kernel
long kernel = cl.clCreateKernel(program, "VectorAdd", intArray, 0);
checkError("on clCreateKernel", intArray[0]);
ret = cl.clReleaseContext(context);
checkError("on clReleaseContext", ret);
}
private String getBuildStatus(int status) {
switch(status) {
case CL.CL_BUILD_SUCCESS:
return "CL_BUILD_SUCCESS";
case CL.CL_BUILD_NONE:
return "CL_BUILD_NONE";
case CL.CL_BUILD_IN_PROGRESS:
return "CL_BUILD_IN_PROGRESS";
case CL.CL_BUILD_ERROR:
return "CL_BUILD_ERROR";
// can't find this flag in spec...
// case CL.CL_BUILD_PROGRAM_FAILURE:
// return "CL_BUILD_PROGRAM_FAILURE";
default:
return "unknown status: " + status;
}
}
@Test
public void highLevelTest() {
out.println(" - - - highLevelTest - - - ");
CLPlatform[] clPlatforms = CLContext.listCLPlatforms();
for (CLPlatform platform : clPlatforms) {
out.println("platform info:");
out.println(" name: "+platform.getName());
out.println(" profile: "+platform.getProfile());
out.println(" version: "+platform.getVersion());
out.println(" vendor: "+platform.getVendor());
CLDevice[] clDevices = platform.listCLDevices();
for (CLDevice device : clDevices) {
out.println("device info:");
out.println(" name: "+device.getName());
out.println(" profile: "+device.getProfile());
out.println(" vendor: "+device.getVendor());
out.println(" type: "+device.getType());
out.println(" global mem: "+device.getGlobalMemSize()/(1024*1024)+" MB");
out.println(" local mem: "+device.getLocalMemSize()/1024+" KB");
out.println(" clock: "+device.getMaxClockFrequency()+" MHz");
out.println(" max work group size: "+device.getMaxWorkGroupSize());
out.println(" max compute units: "+device.getMaxComputeUnits());
out.println(" extensions: "+device.getExtensions());
}
}
CLContext ctx = CLContext.create();
// CLDevice device = ctx.getMaxFlopsDevice();
// out.println("max FLOPS device: " + device);
ctx.release();
}
private final int roundUp(int groupSize, int globalSize) {
int r = globalSize % groupSize;
if (r == 0) {
return globalSize;
} else {
return globalSize + groupSize - r;
}
}
private final void checkForError(int ret) {
this.checkError("", ret);
}
private final void checkError(String msg, int ret) {
if(ret != CL.CL_SUCCESS)
throw new CLException(ret, msg);
}
}
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