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SAE: removed simple_optimizer . Added optimizer mode for tensorflow only (NVIDIA cards), allows to train x2-x3 bigger networks with normal Adam optimizer, consuming VRAM and CPU power.
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iperov
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7d6ca32250
commit
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3 changed files with 100 additions and 37 deletions
102
nnlib/nnlib.py
102
nnlib/nnlib.py
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@ -72,7 +72,7 @@ RandomNormal = keras.initializers.RandomNormal
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Model = keras.models.Model
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Adam = keras.optimizers.Adam
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DFLOptimizer = nnlib.DFLOptimizer
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AdamCPU = nnlib.AdamCPU
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modelify = nnlib.modelify
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gaussian_blur = nnlib.gaussian_blur
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@ -434,28 +434,93 @@ NLayerDiscriminator = nnlib.NLayerDiscriminator
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return dict(list(base_config.items()) + list(config.items()))
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nnlib.Scale = Scale
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class DFLOptimizer(keras.optimizers.Optimizer):
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def __init__(self, lr=0.001, **kwargs):
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super(DFLOptimizer, self).__init__(**kwargs)
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class AdamCPU(keras.optimizers.Optimizer):
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"""Adam optimizer.
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Default parameters follow those provided in the original paper.
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# Arguments
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lr: float >= 0. Learning rate.
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beta_1: float, 0 < beta < 1. Generally close to 1.
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beta_2: float, 0 < beta < 1. Generally close to 1.
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epsilon: float >= 0. Fuzz factor. If `None`, defaults to `K.epsilon()`.
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decay: float >= 0. Learning rate decay over each update.
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amsgrad: boolean. Whether to apply the AMSGrad variant of this
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algorithm from the paper "On the Convergence of Adam and
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Beyond".
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# References
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- [Adam - A Method for Stochastic Optimization](
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https://arxiv.org/abs/1412.6980v8)
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- [On the Convergence of Adam and Beyond](
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https://openreview.net/forum?id=ryQu7f-RZ)
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"""
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def __init__(self, lr=0.001, beta_1=0.9, beta_2=0.999,
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epsilon=None, decay=0., amsgrad=False, tf_cpu_mode=0, **kwargs):
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super(AdamCPU, self).__init__(**kwargs)
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with K.name_scope(self.__class__.__name__):
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self.iterations = K.variable(0, dtype='int64', name='iterations')
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self.lr = K.variable(lr, name='lr')
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self.beta_1 = K.variable(0.9, name='beta_1')
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self.beta_2 = K.variable(0.998, name='beta_2')
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self.beta_1 = K.variable(beta_1, name='beta_1')
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self.beta_2 = K.variable(beta_2, name='beta_2')
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self.decay = K.variable(decay, name='decay')
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if epsilon is None:
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epsilon = K.epsilon()
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self.epsilon = epsilon
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self.initial_decay = decay
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self.amsgrad = amsgrad
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self.tf_cpu_mode = tf_cpu_mode
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@keras.legacy.interfaces.legacy_get_updates_support
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def get_updates(self, loss, params):
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grads = self.get_gradients(loss, params)
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self.updates = [K.update_add(self.iterations, 1)]
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lr_t = self.lr * ( ( K.cast(self.iterations, K.floatx()) ) % 100 + 1 ) / 100.0
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lr = self.lr
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if self.initial_decay > 0:
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lr = lr * (1. / (1. + self.decay * K.cast(self.iterations,
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K.dtype(self.decay))))
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t = K.cast(self.iterations, K.floatx()) + 1
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lr_t = lr * (K.sqrt(1. - K.pow(self.beta_2, t)) /
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(1. - K.pow(self.beta_1, t)))
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self.weights = []
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for p, g in zip(params, grads):
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if self.tf_cpu_mode > 0:
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with K.tf.device("/cpu:0"):
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ms = [K.zeros(K.int_shape(p), dtype=K.dtype(p)) for p in params]
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vs = [K.zeros(K.int_shape(p), dtype=K.dtype(p)) for p in params]
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if self.amsgrad:
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vhats = [K.zeros(K.int_shape(p), dtype=K.dtype(p)) for p in params]
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else:
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vhats = [K.zeros(1) for _ in params]
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else:
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ms = [K.zeros(K.int_shape(p), dtype=K.dtype(p)) for p in params]
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vs = [K.zeros(K.int_shape(p), dtype=K.dtype(p)) for p in params]
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if self.amsgrad:
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vhats = [K.zeros(K.int_shape(p), dtype=K.dtype(p)) for p in params]
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else:
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vhats = [K.zeros(1) for _ in params]
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m_t = (1. - self.beta_1) * g
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v_t = (1. - self.beta_2) * K.square(g)
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new_p = p - lr_t * m_t / (K.sqrt(v_t) + K.epsilon() )
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self.weights = [self.iterations] + ms + vs + vhats
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for p, g, m, v, vhat in zip(params, grads, ms, vs, vhats):
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if self.tf_cpu_mode == 2:
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with K.tf.device("/cpu:0"):
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m_t = (self.beta_1 * m) + (1. - self.beta_1) * g
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v_t = (self.beta_2 * v) + (1. - self.beta_2) * K.square(g)
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else:
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m_t = (self.beta_1 * m) + (1. - self.beta_1) * g
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v_t = (self.beta_2 * v) + (1. - self.beta_2) * K.square(g)
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if self.amsgrad:
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vhat_t = K.maximum(vhat, v_t)
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p_t = p - lr_t * m_t / (K.sqrt(vhat_t) + self.epsilon)
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self.updates.append(K.update(vhat, vhat_t))
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else:
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p_t = p - lr_t * m_t / (K.sqrt(v_t) + self.epsilon)
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self.updates.append(K.update(m, m_t))
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self.updates.append(K.update(v, v_t))
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new_p = p_t
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# Apply constraints.
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if getattr(p, 'constraint', None) is not None:
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@ -467,13 +532,14 @@ NLayerDiscriminator = nnlib.NLayerDiscriminator
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def get_config(self):
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config = {'lr': float(K.get_value(self.lr)),
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'beta_1': float(K.get_value(self.beta_1)),
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'beta_2': float(K.get_value(self.beta_2))
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}
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base_config = super(DFLOptimizer, self).get_config()
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'beta_2': float(K.get_value(self.beta_2)),
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'decay': float(K.get_value(self.decay)),
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'epsilon': self.epsilon,
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'amsgrad': self.amsgrad}
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base_config = super(AdamCPU, self).get_config()
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return dict(list(base_config.items()) + list(config.items()))
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nnlib.DFLOptimizer = DFLOptimizer
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nnlib.AdamCPU = AdamCPU
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'''
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not implemented in plaidML
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class ReflectionPadding2D(keras.layers.Layer):
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