Module: TensorStream::OpenCLHelpers::NNOps

Included in:
Evaluator::OpenclEvaluator
Defined in:
lib/tensor_stream/opencl/nn_ops.rb

Overview

Collection of math functions for interfacing with OpenCL kernels

Class Method Summary collapse

Class Method Details

.included(klass) ⇒ Object 



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# File 'lib/tensor_stream/opencl/nn_ops.rb', line 5

def NNOps.included(klass)
  klass.class_eval do

    # Fast in place multiply subtract assign
    register_op :apply_gradient_descent do |_context, tensor, inputs|
      _target_var, learning_rate, delta = inputs

      assign = tensor.inputs[0] || tensor

      assign.buffer.dirty = true # force buffer copy when variable is read externally
      output_buffer = assign.buffer

      work_group = [output_buffer.total_elements]

      event_wait_list = build_event_wait_list([assign.buffer, learning_rate, delta])

      event = call_program("apply_gradient", output_buffer.data_type,
                     work_group,
                     delta.cl_buffer,
                     learning_rate.cl_buffer,
                     output_buffer.cl_buffer, event_wait_list: event_wait_list)
      output_buffer.op = event
      output_buffer
    end

    # updates for gradient descent with momentum
    register_op :apply_momentum do |_context, tensor, inputs|
      target_var, momentum_var, learning_rate, grad, momentum = inputs

      assign = tensor.inputs[0] || tensor
      assign_acc = tensor.inputs[1]
      assign.buffer.dirty = true # force buffer copy when variable is read externally
      assign_acc.buffer.dirty = true # force buffer copy when variable is read externally

      output_buffer = assign.buffer

      work_group = [output_buffer.total_elements]

      event_wait_list = build_event_wait_list([assign.buffer, assign_acc.buffer, learning_rate, grad, momentum])
      method_call = :"apply_momentum_#{output_buffer.data_type}"
      event = _cl_program("apply_momentum", nesterov: tensor.options[:use_nesterov], dtype: output_buffer.data_type).
                  send(method_call, _opencl_queue, work_group, grad.cl_buffer,
                      learning_rate.cl_buffer, momentum.cl_buffer, output_buffer.cl_buffer,
                      assign_acc.buffer.cl_buffer, event_wait_list: event_wait_list)
      output_buffer.op = event
      assign_acc.buffer.op = event
      output_buffer
    end

    register_op :apply_adadelta do |context, tensor, inputs|
      _target_var, _accum, _accum_update, lr, rho, epsilon, grad = inputs
      assign = tensor.inputs[0] || tensor
      assign_acc = tensor.inputs[1]
      assign_acc_update = tensor.inputs[2]

      # mark variable buffers as dirty
      assign.buffer.dirty = true # force buffer copy when variable is read externally
      assign_acc.buffer.dirty = true # force buffer copy when variable is read externally
      assign_acc_update.buffer.dirty = true # force buffer copy when variable is read externally

      output_buffer = assign.buffer

      work_group = [output_buffer.total_elements]

      event_wait_list = build_event_wait_list(inputs)
      event = call_program('apply_adadelta', output_buffer.data_type,
                                work_group,
                                lr.cl_buffer,
                                rho.cl_buffer,
                                epsilon.cl_buffer,
                                grad.cl_buffer,
                                assign.buffer.cl_buffer,
                                assign_acc.buffer.cl_buffer,
                                assign_acc_update.buffer.cl_buffer,
                                event_wait_list: event_wait_list)
      output_buffer.op = event
      assign_acc.buffer.op = event
      assign_acc_update.buffer.op = event
      output_buffer
    end

    # Adam optimization algorithm
    register_op :apply_adam do |_context, tensor, inputs|
      _target_var, _m, _v, beta1_power, beta2_power, lr_t, beta1_t, beta2_t, epsilon_t, grad = inputs

      assign = tensor.inputs[0] || tensor
      assign_m = tensor.inputs[1]
      assign_v = tensor.inputs[2]

      # mark variable buffers as dirty
      assign.buffer.dirty = true # force buffer copy when variable is read externally
      assign_m.buffer.dirty = true # force buffer copy when variable is read externally
      assign_v.buffer.dirty = true # force buffer copy when variable is read externally

      output_buffer = assign.buffer

      work_group = [output_buffer.total_elements]

      event_wait_list = build_event_wait_list(inputs)
      event = call_program("apply_adam", output_buffer.data_type,
                                work_group,
                                grad.cl_buffer,
                                lr_t.cl_buffer,
                                beta1_power.cl_buffer,
                                beta2_power.cl_buffer,
                                beta1_t.cl_buffer,
                                beta2_t.cl_buffer,
                                epsilon_t.cl_buffer,
                                assign_m.buffer.cl_buffer,
                                assign.buffer.cl_buffer,
                                assign_v.buffer.cl_buffer,
                                event_wait_list: event_wait_list)
      output_buffer.op = event
      assign_m.buffer.op = event
      assign_v.buffer.op = event
      output_buffer
    end

    register_op :apply_adagrad do |context, tensor, inputs|
      target_var, accum, lr, grad = inputs

      assign = tensor.inputs[0] || tensor
      assign_acc = tensor.inputs[1]
      
      assign.buffer.dirty = true
      assign_acc.buffer.dirty = true
      output_buffer = assign.buffer

      work_group = [output_buffer.total_elements]

      event_wait_list = build_event_wait_list(inputs)
      event = call_program('apply_adagrad', 
                                output_buffer.data_type,
                                work_group,
                                lr.cl_buffer,
                                grad.cl_buffer,
                                assign.buffer.cl_buffer,
                                assign_acc.buffer.cl_buffer,
                                event_wait_list: event_wait_list)
      output_buffer.op = event
      assign_acc.buffer.op = event
      output_buffer
    end

    register_op :apply_centered_rms_prop do |context, tensor, inputs|
      var, mg, ms, mom, lr, rho, momentum, epsilon, grad = inputs

      assign = tensor.inputs[0]
      assign_mg = tensor.inputs[1]
      assign_ms = tensor.inputs[2]
      assign_mom = tensor.inputs[3]

      assign.buffer.dirty = true
      assign_mg.buffer.dirty = true
      assign_ms.buffer.dirty = true
      assign_mom.buffer.dirty = true
      output_buffer = assign.buffer
      event_wait_list = build_event_wait_list(inputs)
      work_group = [output_buffer.total_elements]

      event = call_program('apply_centered_rms_prop', output_buffer.data_type, work_group,
                      lr.cl_buffer,
                      rho.cl_buffer,
                      momentum.cl_buffer,
                      epsilon.cl_buffer,
                      grad.cl_buffer,
                      assign.buffer.cl_buffer,
                      assign_ms.buffer.cl_buffer,
                      assign_mg.buffer.cl_buffer,
                      assign_mom.buffer.cl_buffer,
                      event_wait_list: event_wait_list)

      output_buffer.op = event
      assign_mg.buffer.op = event
      assign_ms.buffer.op = event
      assign_mom.buffer.op = event
      output_buffer
    end

    register_op :apply_rms_prop do |context, tensor, inputs|
      var, ms, mom, lr, rho, momentum, epsilon, grad = inputs

      assign = tensor.inputs[0]
      assign_ms = tensor.inputs[1]
      assign_mom = tensor.inputs[2]

      assign.buffer.dirty = true
      assign_ms.buffer.dirty = true
      assign_mom.buffer.dirty = true
      output_buffer = assign.buffer
      event_wait_list = build_event_wait_list(inputs)
      work_group = [output_buffer.total_elements]

      event = call_program('apply_rms_prop', output_buffer.data_type, 
                      work_group,
                      lr.cl_buffer,
                      rho.cl_buffer,
                      momentum.cl_buffer,
                      epsilon.cl_buffer,
                      grad.cl_buffer,
                      assign.buffer.cl_buffer,
                      assign_ms.buffer.cl_buffer,
                      assign_mom.buffer.cl_buffer,
                      event_wait_list: event_wait_list)

      output_buffer.op = event
      assign_ms.buffer.op = event
      assign_mom.buffer.op = event
      output_buffer
    end

    register_op :softmax do |_context, tensor, inputs|
      a = inputs[0]
      event_wait_list = build_event_wait_list(inputs)
      dtype = tensor.data_type
      output_buffer = _create_result_buffer(tensor.data_type, a.shape, tensor.name)

      m, n = a.shape
      work_group = [m]
      n = m if n.nil?
      cl_n = OpenCL::Int1.new(n || 1)

      event = _cl_program("softmax", dtype: dtype).send(:"softmax_#{dtype}", _opencl_queue, work_group, cl_n, a.cl_buffer, output_buffer.cl_buffer, event_wait_list: event_wait_list)
      output_buffer.op = event
      output_buffer
    end

    register_op :log_softmax do |_context, tensor, inputs|
      a = inputs[0] # logits
      event_wait_list = build_event_wait_list(inputs)
      dtype = tensor.data_type
      output_buffer = _create_result_buffer(tensor.data_type, a.shape, tensor.name)

      m, n = a.shape
      work_group = [m]
      n = m if n.nil?
      cl_n = OpenCL::Int1.new(n || 1)

      event = _cl_program("log_softmax", dtype: dtype).send(:"log_softmax_#{dtype}", _opencl_queue, work_group, cl_n, a.cl_buffer, output_buffer.cl_buffer, event_wait_list: event_wait_list)
      output_buffer.op = event
      output_buffer
    end

    register_op :softmax_cross_entropy_with_logits_v2 do |context, tensor, inputs|
      a = inputs[0] # logits
      b = inputs[1] # labels
      event_wait_list = build_event_wait_list(inputs)
      dtype = tensor.data_type
      output_buffer = _create_result_buffer(tensor.data_type, a.shape, tensor.name)
      output_buffer_backprop = _create_result_buffer(tensor.data_type, a.shape, "#{tensor.name}_2")
      rank = a.shape.size - 1
      m, n = a.shape
      work_group = [m]
      n = m if n.nil?
      cl_n = OpenCL::Int1.new(n || 1)

      event = _cl_program("softmax_cross", dtype: dtype).send(:"softmax_cross_#{dtype}", _opencl_queue, work_group, cl_n, a.cl_buffer, b.cl_buffer,
                           output_buffer.cl_buffer, output_buffer_backprop.cl_buffer, event_wait_list: event_wait_list)
      output_buffer.op = event
      output_buffer_backprop.op = event

      loss = reduction(context, tensor, output_buffer, rank, :sum)
      TensorStream::Evaluator::OutputGroup.new([loss, output_buffer_backprop],  [tensor.inputs[0].data_type, tensor.inputs[0].data_type])
    end

    register_op :softmax_cross_entropy_with_logits_v2_grad do |_context, tensor, inputs|
      a = inputs[0] # logits
      b = inputs[1] # labels
      c = inputs[2] # grads
      event_wait_list = build_event_wait_list(inputs)
      dtype = tensor.data_type
      output_buffer = _create_result_buffer(tensor.data_type, a.shape, tensor.name)

      m, n = a.shape
      work_group = [m]
      n = m if n.nil?
      cl_n = OpenCL::Int1.new(n || 1)

      event = _cl_program("softmax_cross_grad", dtype: dtype).send(:"softmax_cross_grad_#{dtype}", _opencl_queue, work_group, cl_n, a.cl_buffer, b.cl_buffer, c.cl_buffer, output_buffer.cl_buffer, event_wait_list: event_wait_list)
      output_buffer.op = event
      output_buffer
    end

    register_op :sparse_softmax_cross_entropy_with_logits do |context, tensor, inputs|
      a = inputs[0] # logits
      labels = read_final_result(complete_eval(inputs[1], context)) # labels
      labels = last_axis(labels)
      num_classes = a.shape.last

      labels = labels.map do |l|
        one_hot = Array.new(num_classes) { 0 }
        one_hot[l] = 1
        one_hot
      end

      b = wrap_opencl(labels, data_type: inputs[0].data_type, name: "#{tensor.name}_label")
 
      event_wait_list = build_event_wait_list(inputs)
      dtype = tensor.data_type
      output_buffer = _create_result_buffer(tensor.data_type, a.shape, tensor.name)
      output_buffer_backprop = _create_result_buffer(tensor.data_type, a.shape, "#{tensor.name}_2")
      rank = a.shape.size - 1
      m, n = a.shape
      work_group = [m]
      n = m if n.nil?
      cl_n = OpenCL::Int1.new(n || 1)

      event = _cl_program("softmax_cross", dtype: dtype).send(:"softmax_cross_#{dtype}", _opencl_queue, work_group, cl_n, a.cl_buffer, b.cl_buffer,
                           output_buffer.cl_buffer, output_buffer_backprop.cl_buffer, event_wait_list: event_wait_list)
      output_buffer.op = event
      output_buffer_backprop.op = event

      loss = reduction(context, tensor, output_buffer, rank, :sum)
      TensorStream::Evaluator::OutputGroup.new([loss, output_buffer_backprop],  [tensor.inputs[0].data_type, tensor.inputs[0].data_type])
    end

    register_op :softmax_grad do |_context, tensor, inputs|
      a, grad = inputs

      event_wait_list = build_event_wait_list(inputs)
      dtype = tensor.data_type
      output_buffer = _create_result_buffer(tensor.data_type, a.shape, tensor.name)

      m, n = a.shape
      work_group = [m]
      n = m if n.nil?
      cl_n = OpenCL::Int1.new(n || 1)
      event = _cl_program('softmax_grad', dtype: dtype, size: n).
                  send(:"softmax_grad_#{dtype}", _opencl_queue, work_group, cl_n, a.cl_buffer,
                       grad.cl_buffer, output_buffer.cl_buffer, event_wait_list: event_wait_list)
      output_buffer.op = event
      output_buffer
    end
  end
end