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/*
* Copyright (c) 2016-2019 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.
*/
#ifndef __ARM_COMPUTE_CLSCHEDULER_H__
#define __ARM_COMPUTE_CLSCHEDULER_H__
#include "arm_compute/core/CL/CLHelpers.h"
#include "arm_compute/core/CL/CLTypes.h"
#include "arm_compute/core/CL/OpenCL.h"
#include "arm_compute/core/Error.h"
#include "arm_compute/core/Types.h"
#include "arm_compute/runtime/CL/ICLTuner.h"
namespace arm_compute
{
class ICLKernel;
class ICLTuner;
/** Provides global access to a CL context and command queue. */
class CLScheduler final
{
public:
/** Constructor */
CLScheduler();
/** Prevent instances of this class from being copied (As this class contains pointers) */
CLScheduler(const CLScheduler &) = delete;
/** Prevent instances of this class from being copied (As this class contains pointers) */
CLScheduler &operator=(const CLScheduler &) = delete;
/** Default destructor */
~CLScheduler() = default;
/** Access the scheduler singleton.
* This method has been deprecated and will be removed in future releases
* @return The scheduler
*/
static CLScheduler &get();
/** Initialises the context and command queue used by the scheduler to default values
* and sets a default device and kernel path for the @ref CLKernelLibrary.
*
* @param[in] cl_tuner (Optional) Pointer to ICLTuner (default=nullptr)
*/
void default_init(ICLTuner *cl_tuner = nullptr);
/** Initialises the scheduler with context and device provided by the user
*
* @param[in] device OpenCL device to be used
* @param[in] ctx OpenCL ctx to be used
* @param[in] cl_tuner (Optional) Pointer to ICLTuner (default=nullptr)
*/
void default_init_with_context(cl::Device &device, cl::Context &ctx, ICLTuner *cl_tuner = nullptr);
/** Schedule the execution of the passed kernel if possible.
*
* @param[in] kernel Kernel to execute.
* @param[in] flush (Optional) Specifies if the command queue will be flushed after running the kernel.
*/
void enqueue(ICLKernel &kernel, bool flush = true);
/** Initialises the context and command queue to be used by the scheduler.
*
* @param[in] context A CL context.
* @param[in] queue A CL command queue.
* @param[in] device A CL device.
* @param[in] cl_tuner (Optional) Pointer to OpenCL tuner (default=nullptr)
* Note: It is caller's responsibility to release the allocated memory for CLTuner
*/
void init(cl::Context context, cl::CommandQueue queue, const cl::Device &device, ICLTuner *cl_tuner = nullptr);
/** Accessor for the associated CL context.
*
* @return A CL context.
*/
cl::Context &context();
/** Accessor for the associated CL command queue.
*
* @return A CL command queue.
*/
cl::CommandQueue &queue();
/** Get the target GPU.
*
* @return The target GPU.
*/
GPUTarget target() const;
/** Accessor to set the CL context to be used by the scheduler.
*
* @param[in] context A CL context.
*/
void set_context(cl::Context context);
/** Accessor to set the CL command queue to be used by the scheduler.
*
* @param[in] queue A CL command queue.
*/
void set_queue(cl::CommandQueue queue);
/** Accessor to set target GPU to be used by the scheduler.
*
* @param[in] target The target GPU.
*/
void set_target(GPUTarget target);
/** Accessor to set the CL tuner to be used by the scheduler.
*
* @param[in] tuner A CL tuner
*/
void set_tuner(ICLTuner *tuner);
/** Blocks until all commands in the associated command queue have finished. */
void sync();
/** Enqueues a marker into the associated command queue and return the event.
*
* @return An event that can be waited on to block the executing thread.
*/
cl::Event enqueue_sync_event();
/** Tunes OpenCL kernel
*
* @param[in] kernel Kernel to tune
*/
void tune_kernel_static(ICLKernel &kernel);
bool is_initialised() const;
private:
/** Flag to ensure symbols initialisation is happening before Scheduler creation */
static std::once_flag _initialize_symbols;
cl::Context _context;
cl::CommandQueue _queue;
GPUTarget _target;
bool _is_initialised;
ICLTuner *_cl_tuner;
std::unique_ptr<ICLTuner> _cl_default_static_tuner;
};
}
#endif /* __ARM_COMPUTE_CLSCHEDULER_H__ */
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