Class: TensorStream::Session

Inherits:
Object
  • Object
show all
Includes:
StringHelper
Defined in:
lib/tensor_stream/session.rb

Overview

TensorStream class that defines a session

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Methods included from StringHelper

#camelize

Constructor Details

#initialize(evaluator = nil, thread_pool_class: Concurrent::ImmediateExecutor, log_device_placement: false, evaluator_options: {}) ⇒ Session

Returns a new instance of Session.



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# File 'lib/tensor_stream/session.rb', line 9

def initialize(evaluator = nil, thread_pool_class: Concurrent::ImmediateExecutor, log_device_placement: false, evaluator_options: {})
  @thread_pool = thread_pool_class.new
  @closed = false
  @session_cache = {}
  @randomizer = {}
  @log_device_placement = log_device_placement
  @evaluator_options = evaluator_options
  get_evaluator_classes(evaluator)
  @evaluators = {}
end

Instance Attribute Details

#closed ⇒ Object (readonly)

Returns the value of attribute closed.



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# File 'lib/tensor_stream/session.rb', line 6

def closed
  @closed
end

#last_session_context ⇒ Object (readonly)

Returns the value of attribute last_session_context.



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# File 'lib/tensor_stream/session.rb', line 6

def last_session_context
  @last_session_context
end

#randomizer ⇒ Object

Returns the value of attribute randomizer.



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# File 'lib/tensor_stream/session.rb', line 7

def randomizer
  @randomizer
end

#session_cache ⇒ Object (readonly)

Returns the value of attribute session_cache.



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# File 'lib/tensor_stream/session.rb', line 6

def session_cache
  @session_cache
end

#target ⇒ Object (readonly)

Returns the value of attribute target.



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# File 'lib/tensor_stream/session.rb', line 6

def target
  @target
end

Class Method Details

.default_session ⇒ Object 



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# File 'lib/tensor_stream/session.rb', line 38

def self.default_session
  @session ||= Session.new
end

Instance Method Details

#clear_session_cache ⇒ Object 



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# File 'lib/tensor_stream/session.rb', line 34

def clear_session_cache
  @session_cache = {}
end

#close ⇒ Object 



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# File 'lib/tensor_stream/session.rb', line 87

def close
  @closed = true
end

#closed? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/tensor_stream/session.rb', line 91

def closed?
  @closed
end

#delegate_to_evaluator(tensor_arr, session_context, context) ⇒ Object 



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# File 'lib/tensor_stream/session.rb', line 115

def delegate_to_evaluator(tensor_arr, session_context, context)
  arr = tensor_arr.is_a?(Array) ? tensor_arr : [tensor_arr]
  result = arr.collect do |tensor|
    session_context[:_cache][:placement][tensor.name][1].run_with_buffer(tensor, session_context, context)
  end
  result.size == 1 ? result.first : result
end

#dump_internal_ops(tensor) ⇒ Object 



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# File 'lib/tensor_stream/session.rb', line 95

def dump_internal_ops(tensor)
  dump_ops(tensor, ->(_k, n) { n.is_a?(Tensor) && n.internal? })
end

#dump_ops(tensor, selector) ⇒ Object 



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# File 'lib/tensor_stream/session.rb', line 103

def dump_ops(tensor, selector)
  graph = tensor.graph
  graph.nodes.select { |k, v| selector.call(k, v) }.collect { |k, node|
    next unless @last_session_context[node.name]
    "#{k} #{node.to_math(true, 1)} = #{@last_session_context[node.name]}"
  }.compact
end

#dump_user_ops(tensor) ⇒ Object 



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# File 'lib/tensor_stream/session.rb', line 99

def dump_user_ops(tensor)
  dump_ops(tensor, ->(_k, n) { n.is_a?(Tensor) && !n.internal? })
end

#get_evaluator_classes(evaluators) ⇒ Object 



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# File 'lib/tensor_stream/session.rb', line 20

def get_evaluator_classes(evaluators)
  @evaluator_classes = if evaluators.is_a?(Array)
                         if evaluators.empty?
                           TensorStream::Evaluator.default_evaluators
                         else
                           evaluators.collect { |name|  Object.const_get("TensorStream::Evaluator::#{camelize(name.to_s)}") }
                         end
                       elsif evaluators.nil?
                         TensorStream::Evaluator.default_evaluators
                       else
                         [Object.const_get("TensorStream::Evaluator::#{camelize(evaluators.to_s)}")]
                       end
end

#graph_ml(tensor, filename) ⇒ Object 



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# File 'lib/tensor_stream/session.rb', line 111

def graph_ml(tensor, filename)
  TensorStream::Graphml.new(self).serialize(tensor, filename)
end

#list_devices ⇒ Object 



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# File 'lib/tensor_stream/session.rb', line 79

def list_devices
  TensorStream::Evaluator.evaluators.collect do |k, v|
    v[:class].query_supported_devices.collect do |device|
      device
    end
  end.flatten
end

#run(*args) ⇒ Object 



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# File 'lib/tensor_stream/session.rb', line 42

def run(*args)
  options = if args.last.is_a?(Hash)
              args.pop
            else
              {}
            end
  context = {
    _cache: @session_cache
  }

  # scan for placeholders and assign value
  if options[:feed_dict]
    options[:feed_dict].keys.each do |k|
      if k.is_a?(Placeholder)
        context[k.name.to_sym] = options[:feed_dict][k]
      end
    end
  end

  @evaluator_options[:thread_pool] = @thread_pool
  @evaluator_options[:log_intermediates] = options[:log_intermediates]

  args.each { |t| prepare_evaluators(t, context) }
  @last_session_context = context

  if @log_device_placement
    context[:_cache][:placement].each do |k, v|
      puts "#{k} : #{v[0].name}"
    end
  end
  result = args.collect do |e|
    value = delegate_to_evaluator(e, context, {})
    value.respond_to?(:to_ruby) ? value.to_ruby : value
  end
  result.size == 1 ? result.first : result
end