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command_dispatcher.cpp
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command_dispatcher.cpp
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/******************************************************************************\
* ___ __ *
* /\_ \ __/\ \ *
* \//\ \ /\_\ \ \____ ___ _____ _____ __ *
* \ \ \ \/\ \ \ '__`\ /'___\/\ '__`\/\ '__`\ /'__`\ *
* \_\ \_\ \ \ \ \L\ \/\ \__/\ \ \L\ \ \ \L\ \/\ \L\.\_ *
* /\____\\ \_\ \_,__/\ \____\\ \ ,__/\ \ ,__/\ \__/.\_\ *
* \/____/ \/_/\/___/ \/____/ \ \ \/ \ \ \/ \/__/\/_/ *
* \ \_\ \ \_\ *
* \/_/ \/_/ *
* *
* Copyright (C) 2011-2013 *
* Dominik Charousset <dominik.charousset@haw-hamburg.de> *
* Raphael Hiesgen <raphael.hiesgen@haw-hamburg.de> *
* *
* This file is part of libcppa. *
* libcppa is free software: you can redistribute it and/or modify it under *
* the terms of the GNU Lesser General Public License as published by the *
* Free Software Foundation, either version 3 of the License *
* or (at your option) any later version. *
* *
* libcppa is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. *
* See the GNU Lesser General Public License for more details. *
* *
* You should have received a copy of the GNU Lesser General Public License *
* along with libcppa. If not, see <http://www.gnu.org/licenses/>. *
\******************************************************************************/
#include <sstream>
#include <iostream>
#include <stdexcept>
#include "cppa/cppa.hpp"
#include "cppa/opencl/command_dispatcher.hpp"
using namespace std;
namespace cppa { namespace opencl {
struct command_dispatcher::worker {
command_dispatcher* m_parent;
typedef command_ptr job_ptr;
job_queue* m_job_queue;
thread m_thread;
job_ptr m_dummy;
worker(command_dispatcher* parent, job_queue* jq, job_ptr dummy)
: m_parent(parent), m_job_queue(jq), m_dummy(dummy) { }
void start() {
m_thread = thread(&command_dispatcher::worker_loop, this);
}
worker(const worker&) = delete;
worker& operator=(const worker&) = delete;
void operator()() {
job_ptr job;
for (;;) {
/*
* todo:
* manage device usage
* wait for device
*/
// adopt reference count of job queue
job.adopt(m_job_queue->pop());
if(job != m_dummy) {
try {
cl_command_queue cmd_q =
m_parent->m_devices.front().cmd_queue.get();
job->enqueue(cmd_q);
cl_int err{clFlush(cmd_q)};
if (err != CL_SUCCESS) {
throw runtime_error("[!!!] clFlush: '"
+ get_opencl_error(err)
+ "'.");
}
}
catch (exception& e) {
cerr << e.what() << endl;
}
}
else {
cout << "worker done" << endl;
return;
}
}
}
};
void command_dispatcher::worker_loop(command_dispatcher::worker* w) {
(*w)();
}
void command_dispatcher::supervisor_loop(command_dispatcher* scheduler,
job_queue* jq, command_ptr m_dummy) {
unique_ptr<command_dispatcher::worker> worker;
worker.reset(new command_dispatcher::worker(scheduler, jq, m_dummy));
worker->start();
worker->m_thread.join();
worker.reset();
cout << "supervisor done" << endl;
}
void command_dispatcher::initialize() {
m_dummy = make_counted<command_dummy>();
cl_int err{0};
/* find up to two available platforms */
vector<cl_platform_id> ids(2);
cl_uint number_of_platforms;
err = clGetPlatformIDs(ids.size(), ids.data(), &number_of_platforms);
if (err != CL_SUCCESS) {
throw logic_error("[!!!] clGetPlatformIDs: '"
+ get_opencl_error(err)
+ "'.");
}
else if (number_of_platforms < 1) {
throw logic_error("[!!!] clGetPlatformIDs: 'no platforms found'.");
}
/* find gpu devices on our platform */
int pid{0};
cl_uint num_devices{0};
// cout << "Currently only looking for cpu devices!" << endl;
cl_device_type dev_type{CL_DEVICE_TYPE_GPU};
err = clGetDeviceIDs(ids[pid], dev_type, 0, NULL, &num_devices);
if (err == CL_DEVICE_NOT_FOUND) {
cout << "NO GPU DEVICES FOUND! LOOKING FOR CPU DEVICES NOW ..." << endl;
dev_type = CL_DEVICE_TYPE_CPU;
err = clGetDeviceIDs(ids[pid], dev_type, 0, NULL, &num_devices);
}
if (err != CL_SUCCESS) {
throw runtime_error("[!!!] clGetDeviceIDs: '"
+ get_opencl_error(err)
+ "'.");
}
vector<cl_device_id> devices(num_devices);
err = clGetDeviceIDs(ids[pid], dev_type, num_devices, devices.data(), NULL);
if (err != CL_SUCCESS) {
throw runtime_error("[!!!] clGetDeviceIDs: '"
+ get_opencl_error(err)
+ "'.");
}
/* create a context */
m_context.adopt(clCreateContext(0, 1, devices.data(), NULL, NULL, &err));
if (err != CL_SUCCESS) {
throw runtime_error("[!!!] clCreateContext: '"
+ get_opencl_error(err)
+ "'.");
}
for (auto& d : devices) {
device_ptr device;
device.adopt(d);
unsigned id{++dev_id_gen};
command_queue_ptr cmd_queue;
cmd_queue.adopt(clCreateCommandQueue(m_context.get(),
device.get(),
CL_QUEUE_PROFILING_ENABLE,
&err));
if (err != CL_SUCCESS) {
ostringstream oss;
oss << "[!!!] clCreateCommandQueue (" << id << "): '"
<< get_opencl_error(err) << "'.";
throw runtime_error(oss.str());
}
size_t return_size{0};
size_t max_work_group_size{0};
err = clGetDeviceInfo(device.get(),
CL_DEVICE_MAX_WORK_GROUP_SIZE,
sizeof(size_t),
&max_work_group_size,
&return_size);
if (err != CL_SUCCESS) {
ostringstream oss;
oss << "[!!!] clGetDeviceInfo ("
<< id
<< ":CL_DEVICE_MAX_WORK_GROUP_SIZE): '"
<< get_opencl_error(err) << "'.";
throw runtime_error(oss.str());
}
cl_uint max_work_item_dimensions = 0;
err = clGetDeviceInfo(device.get(),
CL_DEVICE_MAX_WORK_ITEM_DIMENSIONS,
sizeof(cl_uint),
&max_work_item_dimensions,
&return_size);
if (err != CL_SUCCESS) {
ostringstream oss;
oss << "[!!!] clGetDeviceInfo ("
<< id
<< ":CL_DEVICE_MAX_WORK_ITEM_DIMENSIONS): '"
<< get_opencl_error(err) << "'.";
throw runtime_error(oss.str());
}
vector<size_t> max_work_items_per_dim(max_work_item_dimensions);
err = clGetDeviceInfo(device.get(),
CL_DEVICE_MAX_WORK_ITEM_SIZES,
sizeof(size_t)*max_work_item_dimensions,
max_work_items_per_dim.data(),
&return_size);
if (err != CL_SUCCESS) {
ostringstream oss;
oss << "[!!!] clGetDeviceInfo ("
<< id
<< ":CL_DEVICE_MAX_WORK_ITEM_SIZES): '"
<< get_opencl_error(err) << "'.";
throw runtime_error(oss.str());
}
device_info dev_info{id,
cmd_queue,
device,
max_work_group_size,
max_work_item_dimensions,
move(max_work_items_per_dim)};
m_devices.push_back(move(dev_info));
}
m_supervisor = thread(&command_dispatcher::supervisor_loop,
this,
&m_job_queue,
m_dummy);
}
void command_dispatcher::destroy() {
m_dummy->ref(); // reference of m_job_queue
m_job_queue.push_back(m_dummy.get());
m_supervisor.join();
delete this;
}
void command_dispatcher::dispose() {
delete this;
}
} } // namespace cppa::opencl