static inline double get_time(cl::Event& event)
{
using namespace std;
using namespace cl;
event.wait();
cl_ulong start = event.getProfilingInfo<CL_PROFILING_COMMAND_START>();
cl_ulong end = event.getProfilingInfo<CL_PROFILING_COMMAND_END>();
return (end - start) * 1.0e-9;
}
void wait(const bolt::cl::control &ctl, ::cl::Event &e)
{
const bolt::cl::control::e_WaitMode waitMode = ctl.getWaitMode();
if (waitMode == bolt::cl::control::BusyWait) {
const ::cl::CommandQueue& q = ctl.getCommandQueue();
q.flush();
while (e.getInfo<CL_EVENT_COMMAND_EXECUTION_STATUS>() != CL_COMPLETE) {
// spin here for fast completion detection...
};
} else if ((waitMode == bolt::cl::control::NiceWait) || (waitMode == bolt::cl::control::BalancedWait)) {
cl_int l_Error = e.wait();
V_OPENCL( l_Error, "wait call failed" );
} else if (waitMode == bolt::cl::control::ClFinish) {
const ::cl::CommandQueue& q = ctl.getCommandQueue();
cl_int l_Error = q.finish();
V_OPENCL( l_Error, "clFinish call failed" );
}
};
int MaxValueSimple::maxValueCL(int* values, size_t len) {
try {
cl_int status = CL_SUCCESS;
/*** Ausgabe von Informationen ueber gewaehltes OpenCL-Device ***/
/* TODO logging
Logger::logDebug(
METHOD,
Logger::sStream << "max compute units: " << devices[0].getInfo<
CL_DEVICE_MAX_COMPUTE_UNITS> ());
Logger::logDebug(
METHOD,
Logger::sStream << "max work item sizes: "
<< devices[0].getInfo<CL_DEVICE_MAX_WORK_ITEM_SIZES> ()[0]);
Logger::logDebug(
METHOD,
Logger::sStream << "max work group sizes: "
<< devices[0].getInfo<CL_DEVICE_MAX_WORK_GROUP_SIZE> ());
Logger::logDebug(
METHOD,
Logger::sStream << "max global mem size (KB): "
<< devices[0].getInfo<CL_DEVICE_GLOBAL_MEM_SIZE> ()
/ 1024);
Logger::logDebug(
METHOD,
Logger::sStream << "max local mem size (KB): "
<< devices[0].getInfo<CL_DEVICE_LOCAL_MEM_SIZE> ()
/ 1024);
*/
/*** Erstellen und Vorbereiten der Daten ***/
cl::Buffer vBuffer(context, CL_MEM_READ_WRITE | CL_MEM_COPY_HOST_PTR,
sizeof(cl_int) * len, &values[0], &status);
if (status != CL_SUCCESS) {
throw cl::Error(status, "cl::Buffer values");
}
cmdQ.finish();
/*** Arbeitsgroeszen berechnen ***/
// Anzahl der Work-Items = globalSize
// Work-Items pro Work-Group = localSize
const size_t MAX_GROUP_SIZE = devices[0].getInfo<
CL_DEVICE_MAX_WORK_GROUP_SIZE> ();
size_t globalSize;
size_t localSize;
do {
globalSize = len;
localSize = MaxValueSimple::calcWorkGroupSize(globalSize,
MAX_GROUP_SIZE);
if (localSize == 1) {
globalSize = ceil((double) len / WG_FAC) * WG_FAC;
localSize = MaxValueSimple::calcWorkGroupSize(globalSize,
MAX_GROUP_SIZE);
/* TODO logging
Logger::logDebug(
METHOD,
Logger::sStream << "GlobalSize has been extended to "
<< globalSize);
*/
}
/* TODO logging
Logger::logDebug(METHOD,
Logger::sStream << "globalSize: " << globalSize);
Logger::logDebug(METHOD,
Logger::sStream << "localSize: " << localSize);
*/
/*** Kernel-Argumente setzen ***/
status = kernel.setArg(0, vBuffer);
if (status != CL_SUCCESS) {
throw cl::Error(status, "Kernel.SetArg");
}
status = kernel.setArg(1, sizeof(cl_int) * localSize, NULL);
if (status != CL_SUCCESS) {
throw cl::Error(status, "Kernel.SetArg");
}
/*** Kernel ausfuehren und auf Abarbeitung warten ***/
cl::KernelFunctor func = kernel.bind(cmdQ, cl::NDRange(globalSize),
cl::NDRange(localSize));
event = func();
event.wait();
cmdQ.finish();
/*
runtimeKernel
+= event.getProfilingInfo<CL_PROFILING_COMMAND_END> ();
runtimeKernel
-= event.getProfilingInfo<CL_PROFILING_COMMAND_START> ();
*/
len = globalSize / localSize;
} while (globalSize > localSize && localSize > 1);
/*** Daten vom OpenCL-Device holen ***/
// TODO nur 1. element auslesen
status = cmdQ.enqueueReadBuffer(vBuffer, true, 0, sizeof(cl_int) * 1,
&values[0]);
if (status != CL_SUCCESS) {
throw cl::Error(status, "CommandQueue.enqueueReadBuffer");
}
/* TODO logging
Logger::log(
METHOD,
TIME,
Logger::sStream << "timeKernel=" << 1.0e-9 * runtimeKernel
<< ";");
*/
return values[0];
} catch (cl::Error& err) {
// TODO Logger::logError(METHOD, Logger::sStream << err.what());
std::cerr << "[ERROR] MaxValueSimple::maxValueCL(int*, size_t): "
<< err.what() << " (" << err.err() << ")" << std::endl;
return MaxValueSimple::MAX_FAILURE;
} catch (std::exception& err) {
// TODO Logger::logError(METHOD, Logger::sStream << err.what());
std::cerr << "[ERROR] MaxValueSimple::maxValueCL(int*, size_t): "
<< err.what() << std::endl;
return MaxValueSimple::MAX_FAILURE;
}
}