public final class
EnqueueTPUEmbeddingRaggedTensorBatch
Eases the porting of code that uses tf.nn.embedding_lookup().
sample_splits[i], embedding_indices[i] and aggregation_weights[i] correspond to the ith feature. table_ids[i] indicates which embedding table to look up ith feature.
The tensors at corresponding positions in two of the input lists, embedding_indices and aggregation_weights, must have the same shape, i.e. rank 1 with dim_size() equal to the total number of lookups into the table described by the corresponding feature.
Nested Classes
| class | EnqueueTPUEmbeddingRaggedTensorBatch.Options | Optional attributes for EnqueueTPUEmbeddingRaggedTensorBatch
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Public Methods
| static EnqueueTPUEmbeddingRaggedTensorBatch.Options |
combiners(List<String> combiners)
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| static <T extends Number, U extends Number, V extends Number> EnqueueTPUEmbeddingRaggedTensorBatch |
create(Scope scope, Iterable<Operand<T>> sampleSplits, Iterable<Operand<U>> embeddingIndices, Iterable<Operand<V>> aggregationWeights, Operand<String> modeOverride, List<Long> tableIds, Options... options)
Factory method to create a class wrapping a new EnqueueTPUEmbeddingRaggedTensorBatch operation.
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| static EnqueueTPUEmbeddingRaggedTensorBatch.Options |
deviceOrdinal(Long deviceOrdinal)
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| static EnqueueTPUEmbeddingRaggedTensorBatch.Options |
maxSequenceLengths(List<Long> maxSequenceLengths)
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| static EnqueueTPUEmbeddingRaggedTensorBatch.Options |
numFeatures(List<Long> numFeatures)
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Inherited Methods
Public Methods
public static EnqueueTPUEmbeddingRaggedTensorBatch.Options combiners (List<String> combiners)
Parameters
| combiners | A list of string scalars, one for each embedding table that specify how to normalize the embedding activations after weighted summation. Supported combiners are 'mean', 'sum', or 'sqrtn'. It is invalid to have the sum of the weights be 0 for 'mean' or the sum of the squared weights be 0 for 'sqrtn'. If combiners isn't passed, the default is to use 'sum' for all tables. |
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public static EnqueueTPUEmbeddingRaggedTensorBatch create (Scope scope, Iterable<Operand<T>> sampleSplits, Iterable<Operand<U>> embeddingIndices, Iterable<Operand<V>> aggregationWeights, Operand<String> modeOverride, List<Long> tableIds, Options... options)
Factory method to create a class wrapping a new EnqueueTPUEmbeddingRaggedTensorBatch operation.
Parameters
| scope | current scope |
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| sampleSplits | A list of rank 1 Tensors specifying the break points for splitting embedding_indices and aggregation_weights into rows. It corresponds to ids.row_splits in embedding_lookup(), when ids is a RaggedTensor. |
| embeddingIndices | A list of rank 1 Tensors, indices into the embedding tables. It corresponds to ids.values in embedding_lookup(), when ids is a RaggedTensor. |
| aggregationWeights | A list of rank 1 Tensors containing per training example aggregation weights. It corresponds to the values field of a RaggedTensor with the same row_splits as ids in embedding_lookup(), when ids is a RaggedTensor. |
| modeOverride | A string input that overrides the mode specified in the TPUEmbeddingConfiguration. Supported values are {'unspecified', 'inference', 'training', 'backward_pass_only'}. When set to 'unspecified', the mode set in TPUEmbeddingConfiguration is used, otherwise mode_override is used. |
| tableIds | A list of integers specifying the identifier of the embedding table (offset of TableDescriptor in the TPUEmbeddingConfiguration) to lookup the corresponding input. The ith input is looked up using table_ids[i]. The size of the table_ids list must be equal to that of sample_indices, embedding_indices and aggregation_weights. |
| options | carries optional attributes values |
Returns
- a new instance of EnqueueTPUEmbeddingRaggedTensorBatch
public static EnqueueTPUEmbeddingRaggedTensorBatch.Options deviceOrdinal (Long deviceOrdinal)
Parameters
| deviceOrdinal | The TPU device to use. Should be >= 0 and less than the number of TPU cores in the task on which the node is placed. |
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