src/gpu/cl/kernels/ClMatMulNativeMMULKernel.cpp - ml/ComputeLibrary - Gitiles

 /*
  * Copyright (c) 2023 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 "src/gpu/cl/kernels/ClMatMulNativeMMULKernel.h"

 #include "arm_compute/core/CL/CLHelpers.h"
 #include "arm_compute/core/CL/ICLTensor.h"
 #include "arm_compute/core/ITensorPack.h"
 #include "arm_compute/core/KernelDescriptors.h"
 #include "arm_compute/core/TensorInfo.h"
 #include "arm_compute/core/utils/helpers/AdjustVecSize.h"
 #include "arm_compute/core/utils/misc/ShapeCalculator.h"
 #include "arm_compute/core/utils/StringUtils.h"

 #include "src/common/utils/Log.h"
 #include "src/core/helpers/AutoConfiguration.h"
 #include "src/gpu/cl/kernels/helpers/MatMulKernelHelpers.h"
 #include "support/Cast.h"
 #include "support/StringSupport.h"

 namespace arm_compute
 {
 namespace opencl
 {
 namespace kernels
 {
 namespace
 {
 // Block size dimensions for the MMUL extension
 constexpr int mmul_m0 = 4;
 constexpr int mmul_n0 = 4;
 constexpr int mmul_k0 = 4;

 Status validate_matmul_kernel_info(const MatMulKernelInfo &matmul_kernel_info)
 {
     const bool adj_lhs = matmul_kernel_info.adj_lhs;
     const int  m0      = matmul_kernel_info.m0;
     const int  n0      = matmul_kernel_info.n0;
     const int  k0      = matmul_kernel_info.k0;

     // Validate M0
     ARM_COMPUTE_RETURN_ERROR_ON_MSG(m0 < 1, "Only positive integers are supported for M0");

     if (adj_lhs)
     {
         ARM_COMPUTE_RETURN_ERROR_ON_MSG((m0 != 1) && (m0 != 2) && (m0 != 3) && (m0 != 4) && (m0 != 8) && (m0 != 16),
                                         "Only 1,2,3,4,8,16 are supported for M0 for Lhs transposed");
     }

     // Validate N0
     ARM_COMPUTE_RETURN_ERROR_ON_MSG(n0 < 1, "Only positive integers are supported for N0");
     ARM_COMPUTE_RETURN_ERROR_ON_MSG((n0 != 1) && (n0 != 2) && (n0 != 3) && (n0 != 4) && (n0 != 8) && (n0 != 16),
                                     "Only 1,2,3,4,8,16 are supported for N0");

     // Validate K0
     ARM_COMPUTE_RETURN_ERROR_ON_MSG((k0 != 1), "Only 1 is supported for k0");

     return Status{};
 }
 } // namespace
 ClMatMulNativeMMULKernel::ClMatMulNativeMMULKernel()
 {
     _type = CLKernelType::GEMM;
 }

 Status ClMatMulNativeMMULKernel::validate(const ITensorInfo      *lhs,
                                           const ITensorInfo      *rhs,
                                           const ITensorInfo      *bias,
                                           const ITensorInfo      *dst,
                                           const MatMulKernelInfo &matmul_kernel_info)
 {
     ARM_COMPUTE_RETURN_ERROR_ON_NULLPTR(lhs, rhs, dst);
     ARM_COMPUTE_RETURN_ERROR_ON_DATA_TYPE_CHANNEL_NOT_IN(lhs, 1, DataType::F32, DataType::F16);
     ARM_COMPUTE_RETURN_ERROR_ON_MSG(!arm_matrix_multiply_supported(CLKernelLibrary::get().get_device()),
                                     "The extension cl_arm_matrix_multiply is not supported on the target platform");
     ARM_COMPUTE_RETURN_ERROR_ON_MISMATCHING_DATA_TYPES(lhs, rhs);
     ARM_COMPUTE_RETURN_ON_ERROR(validate_matmul_kernel_info(matmul_kernel_info));

     const TensorShape &lhs_shape = lhs->tensor_shape();
     ARM_COMPUTE_RETURN_ON_ERROR(validate_matmul_input_shapes(lhs_shape, rhs->tensor_shape(), matmul_kernel_info));

     const size_t lhs_k = matmul_kernel_info.adj_lhs ? lhs_shape.y() : lhs_shape.x();
     ARM_COMPUTE_RETURN_ERROR_ON_MSG_VAR((lhs_k % mmul_k0) != 0, "K dimension must be a multiple of %d", mmul_k0);

     const TensorShape expected_output_shape =
         misc::shape_calculator::compute_matmul_shape(lhs_shape, rhs->tensor_shape(), matmul_kernel_info);

     if (dst->total_size() != 0)
     {
         const TensorInfo tensor_info_dst = dst->clone()->set_tensor_shape(expected_output_shape);
         ARM_COMPUTE_RETURN_ERROR_ON_MISMATCHING_SHAPES(dst, &tensor_info_dst);
         ARM_COMPUTE_RETURN_ERROR_ON_MISMATCHING_DATA_TYPES(lhs, dst);
     }

     if (bias != nullptr)
     {
         ARM_COMPUTE_RETURN_ERROR_ON_MSG((bias->num_dimensions() > 1), "Multi dimensional bias is unsupported.");
         ARM_COMPUTE_RETURN_ERROR_ON_MSG(bias->dimension(0) != expected_output_shape[0],
                                         "First dimension of bias and output tensors must match.");
         ARM_COMPUTE_RETURN_ERROR_ON_MISMATCHING_DATA_TYPES(lhs, bias);
     }

     return Status{};
 }
 void ClMatMulNativeMMULKernel::configure(const ClCompileContext &compile_context,
                                          ITensorInfo            *lhs,
                                          ITensorInfo            *rhs,
                                          ITensorInfo            *bias,
                                          ITensorInfo            *dst,
                                          const MatMulKernelInfo &matmul_kernel_info)
 {
     ARM_COMPUTE_ERROR_ON_NULLPTR(lhs, rhs, dst);
     ARM_COMPUTE_LOG_PARAMS(lhs, rhs, bias, dst, matmul_kernel_info);
     ARM_COMPUTE_ERROR_THROW_ON(validate(lhs, rhs, bias, dst, matmul_kernel_info));

     // dst tensor auto initialization if not yet initialized
     auto_init_if_empty(*dst, lhs->clone()->set_tensor_shape(misc::shape_calculator::compute_matmul_shape(
                                  lhs->tensor_shape(), rhs->tensor_shape(), matmul_kernel_info)));

     const int m = dst->dimension(1);
     const int n = dst->dimension(0);
     const int k = matmul_kernel_info.adj_lhs ? lhs->tensor_shape().y() : lhs->tensor_shape().x();

     _m = m;
     _n = n;
     _k = k;

     const int m0 = std::min(matmul_kernel_info.m0, m);
     const int n0 = adjust_vec_size(matmul_kernel_info.n0, n);

     // Configure kernel window
     const auto win_config =
         validate_and_configure_window_for_mmul_kernels(lhs, rhs, dst, matmul_kernel_info, mmul_m0, mmul_n0);
     ARM_COMPUTE_ERROR_THROW_ON(win_config.first);
     IClKernel::configure_internal(win_config.second);

     // Calculate partial (store instead of load) M0 and partial N0 for the partial blocks at the end of a row/column if any. This is to avoid padding.
     const unsigned int m0_leftover = m % m0;
     const unsigned int n0_leftover = n % n0;

     CLBuildOptions build_opts;
     build_opts.add_option("-DDATA_TYPE=" + get_cl_type_from_data_type(lhs->data_type()));
     build_opts.add_option_if(lhs->data_type() == DataType::F16, "-DHALF_PRECISION");
     build_opts.add_option("-DM0=" + support::cpp11::to_string(m0));
     build_opts.add_option("-DN0=" + support::cpp11::to_string(n0));
     build_opts.add_option("-DM0_LEFTOVER=" + support::cpp11::to_string(m0_leftover));
     build_opts.add_option("-DN0_LEFTOVER=" + support::cpp11::to_string(n0_leftover));
     build_opts.add_option("-DMMUL_M0=" + support::cpp11::to_string(mmul_m0));
     build_opts.add_option("-DMMUL_N0=" + support::cpp11::to_string(mmul_n0));
     build_opts.add_option("-DMMUL_K0=" + support::cpp11::to_string(mmul_k0));
     build_opts.add_option_if(bias != nullptr, "-DBIAS");

     std::string kernel_name("mat_mul_native_mmul");
     kernel_name += matmul_kernel_info.adj_lhs ? "_t" : "_nt";
     kernel_name += matmul_kernel_info.adj_rhs ? "_t" : "_nt";

     // A macro guard to compile ONLY the kernel of interest
     build_opts.add_option("-D" + upper_string(kernel_name));

     // Create kernel
     _kernel = create_kernel(compile_context, kernel_name, build_opts.options());

     // Set config_id for enabling LWS tuning
     _config_id = kernel_name;
     _config_id += "_";
     _config_id += lower_string(string_from_data_type(lhs->data_type()));
     _config_id += "_";
     _config_id += support::cpp11::to_string(k);
     _config_id += "_";
     _config_id += support::cpp11::to_string(dst->dimension(2));
     _config_id += "_";
     _config_id += support::cpp11::to_string(m0);
     _config_id += "_";
     _config_id += support::cpp11::to_string(n0);
     _config_id += "_";
     _config_id += support::cpp11::to_string(matmul_kernel_info.k0);
 }

 void ClMatMulNativeMMULKernel::run_op(ITensorPack &tensors, const Window &window, cl::CommandQueue &queue)
 {
     ARM_COMPUTE_ERROR_ON_UNCONFIGURED_KERNEL(this);
     ARM_COMPUTE_ERROR_ON_INVALID_SUBWINDOW(ICLKernel::window(), window);

     const ICLTensor *lhs =
         utils::cast::polymorphic_downcast<const ICLTensor *>(tensors.get_const_tensor(TensorType::ACL_SRC_0));
     const ICLTensor *rhs =
         utils::cast::polymorphic_downcast<const ICLTensor *>(tensors.get_const_tensor(TensorType::ACL_SRC_1));
     const ICLTensor *bias = utils::cast::polymorphic_downcast<const ICLTensor *>(
         tensors.get_const_tensor(TensorType::ACL_SRC_2)); // nullptr if bias is not present
     ICLTensor *dst = utils::cast::polymorphic_downcast<ICLTensor *>(tensors.get_tensor(TensorType::ACL_DST));
     ARM_COMPUTE_ERROR_ON_NULLPTR(lhs, rhs, dst);
     ARM_COMPUTE_LOG_PARAMS(lhs, rhs, bias, dst);
     unsigned int idx = 0;

     add_3d_tensor_nhw_argument(idx, lhs);
     add_3d_tensor_nhw_argument(idx, rhs);
     if (bias != nullptr)
     {
         add_3d_tensor_nhw_argument(idx, bias);
     }
     add_3d_tensor_nhw_argument(idx, dst);

     // Pass m and n at runtime as signed ints, to ensure results of any subtractions they could be operand in, would still be signed.
     _kernel.setArg<cl_int>(idx++, _m);
     _kernel.setArg<cl_int>(idx++, _n);
     _kernel.setArg<cl_int>(idx++, _k);

     // LWS_x should be multiple of 16 at least. (32, 2) has been chosen to have more work-items on a single core
     // LWS also enforces the order of execution of the work items which improves cache utilization
     enqueue(queue, *this, window, cl::NDRange(32, 2), false);
 }

 } // namespace kernels
 } // namespace opencl
 } // namespace arm_compute
	/*
	* Copyright (c) 2023 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 "src/gpu/cl/kernels/ClMatMulNativeMMULKernel.h"

	#include "arm_compute/core/CL/CLHelpers.h"
	#include "arm_compute/core/CL/ICLTensor.h"
	#include "arm_compute/core/ITensorPack.h"
	#include "arm_compute/core/KernelDescriptors.h"
	#include "arm_compute/core/TensorInfo.h"
	#include "arm_compute/core/utils/helpers/AdjustVecSize.h"
	#include "arm_compute/core/utils/misc/ShapeCalculator.h"
	#include "arm_compute/core/utils/StringUtils.h"

	#include "src/common/utils/Log.h"
	#include "src/core/helpers/AutoConfiguration.h"
	#include "src/gpu/cl/kernels/helpers/MatMulKernelHelpers.h"
	#include "support/Cast.h"
	#include "support/StringSupport.h"

	namespace arm_compute
	{
	namespace opencl
	{
	namespace kernels
	{
	namespace
	{
	// Block size dimensions for the MMUL extension
	constexpr int mmul_m0 = 4;
	constexpr int mmul_n0 = 4;
	constexpr int mmul_k0 = 4;

	Status validate_matmul_kernel_info(const MatMulKernelInfo &matmul_kernel_info)
	{
	const bool adj_lhs = matmul_kernel_info.adj_lhs;
	const int m0 = matmul_kernel_info.m0;
	const int n0 = matmul_kernel_info.n0;
	const int k0 = matmul_kernel_info.k0;

	// Validate M0
	ARM_COMPUTE_RETURN_ERROR_ON_MSG(m0 < 1, "Only positive integers are supported for M0");

	if (adj_lhs)
	{
	ARM_COMPUTE_RETURN_ERROR_ON_MSG((m0 != 1) && (m0 != 2) && (m0 != 3) && (m0 != 4) && (m0 != 8) && (m0 != 16),
	"Only 1,2,3,4,8,16 are supported for M0 for Lhs transposed");
	}

	// Validate N0
	ARM_COMPUTE_RETURN_ERROR_ON_MSG(n0 < 1, "Only positive integers are supported for N0");
	ARM_COMPUTE_RETURN_ERROR_ON_MSG((n0 != 1) && (n0 != 2) && (n0 != 3) && (n0 != 4) && (n0 != 8) && (n0 != 16),
	"Only 1,2,3,4,8,16 are supported for N0");

	// Validate K0
	ARM_COMPUTE_RETURN_ERROR_ON_MSG((k0 != 1), "Only 1 is supported for k0");

	return Status{};
	}
	} // namespace
	ClMatMulNativeMMULKernel::ClMatMulNativeMMULKernel()
	{
	_type = CLKernelType::GEMM;
	}

	Status ClMatMulNativeMMULKernel::validate(const ITensorInfo *lhs,
	const ITensorInfo *rhs,
	const ITensorInfo *bias,
	const ITensorInfo *dst,
	const MatMulKernelInfo &matmul_kernel_info)
	{
	ARM_COMPUTE_RETURN_ERROR_ON_NULLPTR(lhs, rhs, dst);
	ARM_COMPUTE_RETURN_ERROR_ON_DATA_TYPE_CHANNEL_NOT_IN(lhs, 1, DataType::F32, DataType::F16);
	ARM_COMPUTE_RETURN_ERROR_ON_MSG(!arm_matrix_multiply_supported(CLKernelLibrary::get().get_device()),
	"The extension cl_arm_matrix_multiply is not supported on the target platform");
	ARM_COMPUTE_RETURN_ERROR_ON_MISMATCHING_DATA_TYPES(lhs, rhs);
	ARM_COMPUTE_RETURN_ON_ERROR(validate_matmul_kernel_info(matmul_kernel_info));

	const TensorShape &lhs_shape = lhs->tensor_shape();
	ARM_COMPUTE_RETURN_ON_ERROR(validate_matmul_input_shapes(lhs_shape, rhs->tensor_shape(), matmul_kernel_info));

	const size_t lhs_k = matmul_kernel_info.adj_lhs ? lhs_shape.y() : lhs_shape.x();
	ARM_COMPUTE_RETURN_ERROR_ON_MSG_VAR((lhs_k % mmul_k0) != 0, "K dimension must be a multiple of %d", mmul_k0);

	const TensorShape expected_output_shape =
	misc::shape_calculator::compute_matmul_shape(lhs_shape, rhs->tensor_shape(), matmul_kernel_info);

	if (dst->total_size() != 0)
	{
	const TensorInfo tensor_info_dst = dst->clone()->set_tensor_shape(expected_output_shape);
	ARM_COMPUTE_RETURN_ERROR_ON_MISMATCHING_SHAPES(dst, &tensor_info_dst);
	ARM_COMPUTE_RETURN_ERROR_ON_MISMATCHING_DATA_TYPES(lhs, dst);
	}

	if (bias != nullptr)
	{
	ARM_COMPUTE_RETURN_ERROR_ON_MSG((bias->num_dimensions() > 1), "Multi dimensional bias is unsupported.");
	ARM_COMPUTE_RETURN_ERROR_ON_MSG(bias->dimension(0) != expected_output_shape[0],
	"First dimension of bias and output tensors must match.");
	ARM_COMPUTE_RETURN_ERROR_ON_MISMATCHING_DATA_TYPES(lhs, bias);
	}

	return Status{};
	}
	void ClMatMulNativeMMULKernel::configure(const ClCompileContext &compile_context,
	ITensorInfo *lhs,
	ITensorInfo *rhs,
	ITensorInfo *bias,
	ITensorInfo *dst,
	const MatMulKernelInfo &matmul_kernel_info)
	{
	ARM_COMPUTE_ERROR_ON_NULLPTR(lhs, rhs, dst);
	ARM_COMPUTE_LOG_PARAMS(lhs, rhs, bias, dst, matmul_kernel_info);
	ARM_COMPUTE_ERROR_THROW_ON(validate(lhs, rhs, bias, dst, matmul_kernel_info));

	// dst tensor auto initialization if not yet initialized
	auto_init_if_empty(*dst, lhs->clone()->set_tensor_shape(misc::shape_calculator::compute_matmul_shape(
	lhs->tensor_shape(), rhs->tensor_shape(), matmul_kernel_info)));

	const int m = dst->dimension(1);
	const int n = dst->dimension(0);
	const int k = matmul_kernel_info.adj_lhs ? lhs->tensor_shape().y() : lhs->tensor_shape().x();

	_m = m;
	_n = n;
	_k = k;

	const int m0 = std::min(matmul_kernel_info.m0, m);
	const int n0 = adjust_vec_size(matmul_kernel_info.n0, n);

	// Configure kernel window
	const auto win_config =
	validate_and_configure_window_for_mmul_kernels(lhs, rhs, dst, matmul_kernel_info, mmul_m0, mmul_n0);
	ARM_COMPUTE_ERROR_THROW_ON(win_config.first);
	IClKernel::configure_internal(win_config.second);

	// Calculate partial (store instead of load) M0 and partial N0 for the partial blocks at the end of a row/column if any. This is to avoid padding.
	const unsigned int m0_leftover = m % m0;
	const unsigned int n0_leftover = n % n0;

	CLBuildOptions build_opts;
	build_opts.add_option("-DDATA_TYPE=" + get_cl_type_from_data_type(lhs->data_type()));
	build_opts.add_option_if(lhs->data_type() == DataType::F16, "-DHALF_PRECISION");
	build_opts.add_option("-DM0=" + support::cpp11::to_string(m0));
	build_opts.add_option("-DN0=" + support::cpp11::to_string(n0));
	build_opts.add_option("-DM0_LEFTOVER=" + support::cpp11::to_string(m0_leftover));
	build_opts.add_option("-DN0_LEFTOVER=" + support::cpp11::to_string(n0_leftover));
	build_opts.add_option("-DMMUL_M0=" + support::cpp11::to_string(mmul_m0));
	build_opts.add_option("-DMMUL_N0=" + support::cpp11::to_string(mmul_n0));
	build_opts.add_option("-DMMUL_K0=" + support::cpp11::to_string(mmul_k0));
	build_opts.add_option_if(bias != nullptr, "-DBIAS");

	std::string kernel_name("mat_mul_native_mmul");
	kernel_name += matmul_kernel_info.adj_lhs ? "_t" : "_nt";
	kernel_name += matmul_kernel_info.adj_rhs ? "_t" : "_nt";

	// A macro guard to compile ONLY the kernel of interest
	build_opts.add_option("-D" + upper_string(kernel_name));

	// Create kernel
	_kernel = create_kernel(compile_context, kernel_name, build_opts.options());

	// Set config_id for enabling LWS tuning
	_config_id = kernel_name;
	_config_id += "_";
	_config_id += lower_string(string_from_data_type(lhs->data_type()));
	_config_id += "_";
	_config_id += support::cpp11::to_string(k);
	_config_id += "_";
	_config_id += support::cpp11::to_string(dst->dimension(2));
	_config_id += "_";
	_config_id += support::cpp11::to_string(m0);
	_config_id += "_";
	_config_id += support::cpp11::to_string(n0);
	_config_id += "_";
	_config_id += support::cpp11::to_string(matmul_kernel_info.k0);
	}

	void ClMatMulNativeMMULKernel::run_op(ITensorPack &tensors, const Window &window, cl::CommandQueue &queue)
	{
	ARM_COMPUTE_ERROR_ON_UNCONFIGURED_KERNEL(this);
	ARM_COMPUTE_ERROR_ON_INVALID_SUBWINDOW(ICLKernel::window(), window);

	const ICLTensor *lhs =
	utils::cast::polymorphic_downcast<const ICLTensor *>(tensors.get_const_tensor(TensorType::ACL_SRC_0));
	const ICLTensor *rhs =
	utils::cast::polymorphic_downcast<const ICLTensor *>(tensors.get_const_tensor(TensorType::ACL_SRC_1));
	const ICLTensor bias = utils::cast::polymorphic_downcast<const ICLTensor >(
	tensors.get_const_tensor(TensorType::ACL_SRC_2)); // nullptr if bias is not present
	ICLTensor dst = utils::cast::polymorphic_downcast<ICLTensor >(tensors.get_tensor(TensorType::ACL_DST));
	ARM_COMPUTE_ERROR_ON_NULLPTR(lhs, rhs, dst);
	ARM_COMPUTE_LOG_PARAMS(lhs, rhs, bias, dst);
	unsigned int idx = 0;

	add_3d_tensor_nhw_argument(idx, lhs);
	add_3d_tensor_nhw_argument(idx, rhs);
	if (bias != nullptr)
	{
	add_3d_tensor_nhw_argument(idx, bias);
	}
	add_3d_tensor_nhw_argument(idx, dst);

	// Pass m and n at runtime as signed ints, to ensure results of any subtractions they could be operand in, would still be signed.
	_kernel.setArg<cl_int>(idx++, _m);
	_kernel.setArg<cl_int>(idx++, _n);
	_kernel.setArg<cl_int>(idx++, _k);

	// LWS_x should be multiple of 16 at least. (32, 2) has been chosen to have more work-items on a single core
	// LWS also enforces the order of execution of the work items which improves cache utilization
	enqueue(queue, *this, window, cl::NDRange(32, 2), false);
	}

	} // namespace kernels
	} // namespace opencl
	} // namespace arm_compute