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/*
* Copyright (c) 2016-2018 ARM Limited.
*
* SPDX-License-Identifier: MIT
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to
* deal in the Software without restriction, including without limitation the
* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
* sell copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include "arm_compute/runtime/CL/CLScheduler.h"
#include "arm_compute/core/CL/ICLKernel.h"
#include "arm_compute/runtime/CL/CLTuner.h"
#include "arm_compute/runtime/CL/tuners/Tuners.h"
using namespace arm_compute;
namespace
{
#if defined(ARM_COMPUTE_DEBUG_ENABLED)
void printf_callback(const char *buffer, unsigned int len, size_t complete, void *user_data)
{
printf("%.*s", len, buffer);
}
#endif /* defined(ARM_COMPUTE_DEBUG_ENABLED) */
} // namespace
std::once_flag CLScheduler::_initialize_symbols;
CLScheduler::CLScheduler()
: _context(), _queue(), _target(GPUTarget::MIDGARD), _is_initialised(false), _cl_tuner(nullptr), _cl_default_static_tuner(nullptr)
{
}
CLScheduler &CLScheduler::get()
{
std::call_once(_initialize_symbols, opencl_is_available);
static CLScheduler scheduler;
return scheduler;
}
void CLScheduler::default_init(ICLTuner *cl_tuner)
{
if(!_is_initialised)
{
std::vector<cl::Platform> platforms;
cl::Platform::get(&platforms);
ARM_COMPUTE_ERROR_ON_MSG(platforms.size() == 0, "Couldn't find any OpenCL platform");
cl::Platform p = platforms[0];
cl::Context ctx;
cl::Device device;
std::vector<cl::Device> platform_devices;
p.getDevices(CL_DEVICE_TYPE_DEFAULT, &platform_devices);
ARM_COMPUTE_ERROR_ON_MSG(platform_devices.size() == 0, "Couldn't find any OpenCL device");
device = platform_devices[0];
#if defined(ARM_COMPUTE_DEBUG_ENABLED)
// Query devices in the context for cl_arm_printf support
if(device_supports_extension(device, "cl_arm_printf"))
{
// Create a cl_context with a printf_callback and user specified buffer size.
cl_context_properties properties[] =
{
CL_CONTEXT_PLATFORM, reinterpret_cast<cl_context_properties>(p()),
// Enable a printf callback function for this context.
CL_PRINTF_CALLBACK_ARM, reinterpret_cast<cl_context_properties>(printf_callback),
// Request a minimum printf buffer size of 4MB for devices in the
// context that support this extension.
CL_PRINTF_BUFFERSIZE_ARM, 0x1000,
0
};
ctx = cl::Context(device, properties);
}
else
#endif // defined(ARM_COMPUTE_DEBUG_ENABLED)
{
cl_context_properties properties[] =
{
CL_CONTEXT_PLATFORM, reinterpret_cast<cl_context_properties>(p()),
0
};
ctx = cl::Context(device, properties);
};
cl::CommandQueue queue = cl::CommandQueue(ctx, device);
CLKernelLibrary::get().init("./cl_kernels/", ctx, device);
init(ctx, queue, device, cl_tuner);
// Create a default static tuner and set if none was provided
_cl_default_static_tuner = tuners::TunerFactory::create_tuner(_target);
}
// Set CL tuner
_cl_tuner = (cl_tuner == nullptr) ? _cl_default_static_tuner.get() : cl_tuner;
}
void CLScheduler::enqueue(ICLKernel &kernel, bool flush)
{
ARM_COMPUTE_ERROR_ON_MSG(!_is_initialised,
"The CLScheduler is not initialised yet! Please call the CLScheduler::get().default_init(), \
or CLScheduler::get()::init() and CLKernelLibrary::get()::init() function before running functions!");
// Tune the kernel if the CLTuner has been provided
if(_cl_tuner != nullptr)
{
// Tune the OpenCL kernel
_cl_tuner->tune_kernel_dynamic(kernel);
}
// Run kernel
kernel.run(kernel.window(), _queue);
if(flush)
{
_queue.flush();
}
}
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