Python torch.CharTensor() Examples

def _worker_loop(dataset, index_queue, data_queue, collate_fn):
    global _use_shared_memory
    _use_shared_memory = True

    # torch.set_num_threads(1)
    while True:
        r = index_queue.get()
        if r is None:
            data_queue.put(None)
            break
        idx, batch_indices = r
        try:
            samples = collate_fn([dataset[i] for i in batch_indices])
        except Exception:
            data_queue.put((idx, ExceptionWrapper(sys.exc_info())))
        else:
            data_queue.put((idx, samples))


# numpy_type_map = {
#     'float64': torch.DoubleTensor,
#     'float32': torch.FloatTensor,
#     'float16': torch.HalfTensor,
#     'int64': torch.LongTensor,
#     'int32': torch.IntTensor,
#     'int16': torch.ShortTensor,
#     'int8': torch.CharTensor,
#     'uint8': torch.ByteTensor,
# } 

def is_integer_tensor(tensor: torch.Tensor) -> bool:
    return (
        isinstance(tensor, torch.ByteTensor)
        or isinstance(tensor, torch.CharTensor)
        or isinstance(tensor, torch.ShortTensor)
        or isinstance(tensor, torch.IntTensor)
        or isinstance(tensor, torch.LongTensor)
    ) 

def test_horovod_allgather(self):
        """Test that the allgather correctly gathers 1D, 2D, 3D tensors."""
        hvd.init()
        rank = hvd.rank()
        size = hvd.size()

        dtypes = [torch.ByteTensor, torch.CharTensor, torch.ShortTensor,
                  torch.IntTensor, torch.LongTensor, torch.FloatTensor, torch.DoubleTensor]
        if torch.cuda.is_available():
            dtypes += [torch.cuda.ByteTensor, torch.cuda.CharTensor, torch.cuda.ShortTensor,
                       torch.cuda.IntTensor, torch.cuda.LongTensor, torch.cuda.FloatTensor,
                       torch.cuda.DoubleTensor]
        dims = [1, 2, 3]
        for dtype, dim in itertools.product(dtypes, dims):
            tensor = torch.FloatTensor(*([17] * dim)).fill_(1).mul_(rank)
            tensor = tensor.type(dtype)
            gathered = hvd.allgather(tensor)

            assert list(gathered.shape) == [17 * size] + [17] * (dim - 1)

            for i in range(size):
                rank_tensor = gathered[i * 17:(i + 1) * 17]
                assert list(rank_tensor.shape) == [17] * dim, \
                    'hvd.allgather produces incorrect gathered shape'
                assert rank_tensor.data.min() == i, 'hvd.allgather produces incorrect gathered tensor'
                assert rank_tensor.data.max() == i, 'hvd.allgather produces incorrect gathered tensor' 

def test_horovod_allgather_variable_size(self):
        """Test that the allgather correctly gathers 1D, 2D, 3D tensors,
        even if those tensors have different sizes along the first dim."""
        hvd.init()
        rank = hvd.rank()
        size = hvd.size()

        dtypes = [torch.ByteTensor, torch.CharTensor, torch.ShortTensor,
                  torch.IntTensor, torch.LongTensor, torch.FloatTensor, torch.DoubleTensor]
        if torch.cuda.is_available():
            dtypes += [torch.cuda.ByteTensor, torch.cuda.CharTensor, torch.cuda.ShortTensor,
                       torch.cuda.IntTensor, torch.cuda.LongTensor, torch.cuda.FloatTensor,
                       torch.cuda.DoubleTensor]
        dims = [1, 2, 3]
        for dtype, dim in itertools.product(dtypes, dims):
            # Support tests up to MPI Size of 35
            if size > 35:
                break

            tensor_sizes = [17, 32, 81, 12, 15, 23, 22] * 5
            tensor_sizes = tensor_sizes[:size]

            tensor = torch.FloatTensor(
                *([tensor_sizes[rank]] + [17] * (dim - 1))).fill_(1).mul_(rank)
            tensor = tensor.type(dtype)
            gathered = hvd.allgather(tensor)

            expected_size = sum(tensor_sizes)
            assert list(gathered.shape) == [expected_size] + [17] * (dim - 1)

            for i in range(size):
                rank_size = [tensor_sizes[i]] + [17] * (dim - 1)
                rank_tensor = gathered[sum(
                    tensor_sizes[:i]):sum(tensor_sizes[:i + 1])]
                assert list(rank_tensor.shape) == rank_size
                assert rank_tensor.data.min() == i
                assert rank_tensor.data.max() == i 

def test_horovod_broadcast(self):
        """Test that the broadcast correctly broadcasts 1D, 2D, 3D tensors."""
        hvd.init()
        rank = hvd.rank()
        size = hvd.size()

        # This test does not apply if there is only one worker.
        if size == 1:
            return

        dtypes = [torch.ByteTensor, torch.CharTensor, torch.ShortTensor,
                  torch.IntTensor, torch.LongTensor, torch.FloatTensor, torch.DoubleTensor]
        if torch.cuda.is_available():
            dtypes += [torch.cuda.ByteTensor, torch.cuda.CharTensor, torch.cuda.ShortTensor,
                       torch.cuda.IntTensor, torch.cuda.LongTensor, torch.cuda.FloatTensor,
                       torch.cuda.DoubleTensor]
        dims = [1, 2, 3]
        root_ranks = list(range(size))
        for dtype, dim, root_rank in itertools.product(dtypes, dims, root_ranks):
            tensor = torch.FloatTensor(*([17] * dim)).fill_(1).mul_(rank)
            root_tensor = torch.FloatTensor(*([17] * dim)).fill_(1).mul_(root_rank)
            tensor = tensor.type(dtype)
            root_tensor = root_tensor.type(dtype)
            broadcasted_tensor = hvd.broadcast(tensor, root_rank)
            if rank != root_rank:
                assert (tensor == root_tensor).max() == 0, \
                    'hvd.broadcast modifies source tensor'
            assert (broadcasted_tensor.data == root_tensor).min() == 1, \
                'hvd.broadcast produces incorrect broadcasted tensor' 

def test_horovod_broadcast_inplace(self):
        """Test that the broadcast correctly broadcasts 1D, 2D, 3D tensors."""
        hvd.init()
        rank = hvd.rank()
        size = hvd.size()

        # This test does not apply if there is only one worker.
        if size == 1:
            return

        dtypes = [torch.ByteTensor, torch.CharTensor, torch.ShortTensor,
                  torch.IntTensor, torch.LongTensor, torch.FloatTensor, torch.DoubleTensor]
        if torch.cuda.is_available():
            dtypes += [torch.cuda.ByteTensor, torch.cuda.CharTensor, torch.cuda.ShortTensor,
                       torch.cuda.IntTensor, torch.cuda.LongTensor, torch.cuda.FloatTensor,
                       torch.cuda.DoubleTensor]
        dims = [1, 2, 3]
        root_ranks = list(range(size))
        for dtype, dim, root_rank in itertools.product(dtypes, dims, root_ranks):
            tensor = torch.FloatTensor(*([17] * dim)).fill_(1).mul_(rank)
            root_tensor = torch.FloatTensor(*([17] * dim)).fill_(1).mul_(root_rank)
            tensor = tensor.type(dtype)
            root_tensor = root_tensor.type(dtype)
            broadcasted_tensor = hvd.broadcast_(tensor, root_rank)
            assert (tensor == broadcasted_tensor).min() == 1, \
                'hvd.broadcast does not modify source tensor'
            assert (broadcasted_tensor == root_tensor).min() == 1, \
                'hvd.broadcast produces incorrect broadcasted tensor' 

def default_collate_with_string(batch):
    "Puts each data field into a tensor with outer dimension batch size"
    _use_shared_memory = False
    numpy_type_map = {
        'float64': torch.DoubleTensor,
        'float32': torch.FloatTensor,
        'float16': torch.HalfTensor,
        'int64': torch.LongTensor,
        'int32': torch.IntTensor,
        'int16': torch.ShortTensor,
        'int8': torch.CharTensor,
        'uint8': torch.ByteTensor,
    }
    string_classes = (str, bytes)
    if torch.is_tensor(batch[0]):
        #print("IN","torch.is_tensor(batch[0])")
        #IPython.embed()
        out = None
        if _use_shared_memory:
            # If we're in a background process, concatenate directly into a
            # shared memory tensor to avoid an extra copy
            numel = sum([x.numel() for x in batch])
            storage = batch[0].storage()._new_shared(numel)
            out = batch[0].new(storage)
        #print("batch:",[e.numpy().shape for e in batch])
        return torch.stack(batch, 0, out=out)
    elif type(batch[0]).__module__ == 'numpy':
        elem = batch[0]
        #print("IN", "type(batch[0]).__module__ == 'numpy'")
        #IPython.embed()
        if type(elem).__name__ == 'ndarray':
            if elem.dtype.kind in {'U', 'S'}:
                return np.stack(batch, 0)
            else:
                return torch.stack([torch.from_numpy(b) for b in batch], 0)
        if elem.shape == ():  # scalars
            py_type = float if elem.dtype.name.startswith('float') else int
            return numpy_type_map[elem.dtype.name](list(map(py_type, batch)))
    elif isinstance(batch[0], int):
        return torch.LongTensor(batch)
    elif isinstance(batch[0], float):
        return torch.FloatTensor(batch)
    elif isinstance(batch[0], string_classes):
        return batch
    elif isinstance(batch[0], collections.Mapping):
        return {key: default_collate_with_string([d[key] for d in batch]) for key in batch[0]}
    elif isinstance(batch[0], collections.Sequence):
        transposed = zip(*batch)
        return [default_collate_with_string(samples) for samples in transposed]

    raise TypeError(("batch must contain tensors, numbers, dicts or lists; found {}"
                     .format(type(batch[0])))) 

def test_horovod_allgather_grad(self):
        """Test the correctness of the allgather gradient."""
        hvd.init()
        rank = hvd.rank()
        size = hvd.size()

        dtypes = [torch.ByteTensor, torch.CharTensor, torch.ShortTensor,
                  torch.IntTensor, torch.LongTensor, torch.FloatTensor, torch.DoubleTensor]
        if torch.cuda.is_available():
            dtypes += [torch.cuda.ByteTensor, torch.cuda.CharTensor, torch.cuda.ShortTensor,
                       torch.cuda.IntTensor, torch.cuda.LongTensor, torch.cuda.FloatTensor,
                       torch.cuda.DoubleTensor]
        dims = [1, 2, 3]
        for dtype, dim in itertools.product(dtypes, dims):
            # Support tests up to MPI Size of 35
            if size > 35:
                break

            tensor_sizes = [3, 2, 7, 4, 6, 8, 10] * 5
            tensor_sizes = tensor_sizes[:size]

            tensor = torch.FloatTensor(
                *([tensor_sizes[rank]] + [17] * (dim - 1))).fill_(1).mul_(rank)
            tensor = tensor.type(dtype)
            tensor = torch.autograd.Variable(tensor, requires_grad=True)

            grad_list = []
            for r, size in enumerate(tensor_sizes):
                grad_list.append(torch.ones([size] + [17] * (dim - 1)) * r)
            grad_ys = torch.cat(grad_list, dim=0)

            gathered = hvd.allgather(tensor)
            gathered.backward(grad_ys)
            grad_out = tensor.grad.data.numpy()

            expected = np.ones(
                [tensor_sizes[rank]] + [17] * (dim - 1)
            ) * rank * size
            err = np.linalg.norm(expected - grad_out)
            self.assertLess(err, 0.00000001,
                            "gradient %s differs from expected %s, "
                            "error: %s" % (grad_out, expected, str(err))) 

def default_collate_with_string(batch):
    "Puts each data field into a tensor with outer dimension batch size"
    _use_shared_memory = False
    numpy_type_map = {
        'float64': torch.DoubleTensor,
        'float32': torch.FloatTensor,
        'float16': torch.HalfTensor,
        'int64': torch.LongTensor,
        'int32': torch.IntTensor,
        'int16': torch.ShortTensor,
        'int8': torch.CharTensor,
        'uint8': torch.ByteTensor,
    }
    string_classes = (str, bytes)
    if torch.is_tensor(batch[0]):
        #print("IN","torch.is_tensor(batch[0])")
        #IPython.embed()
        out = None
        if _use_shared_memory:
            # If we're in a background process, concatenate directly into a
            # shared memory tensor to avoid an extra copy
            numel = sum([x.numel() for x in batch])
            storage = batch[0].storage()._new_shared(numel)
            out = batch[0].new(storage)
        #print("batch:",[e.numpy().shape for e in batch])
        return torch.stack(batch, 0, out=out)
    elif type(batch[0]).__module__ == 'numpy':
        elem = batch[0]
        #print("IN", "type(batch[0]).__module__ == 'numpy'")
        #IPython.embed()
        if type(elem).__name__ == 'ndarray':
            if elem.dtype.kind in {'U', 'S'}:
                return np.stack(batch, 0)
            else:
                return torch.stack([torch.from_numpy(b) for b in batch], 0)
        if elem.shape == ():  # scalars
            py_type = float if elem.dtype.name.startswith('float') else int
            return numpy_type_map[elem.dtype.name](list(map(py_type, batch)))
    elif isinstance(batch[0], int):
        return torch.LongTensor(batch)
    elif isinstance(batch[0], float):
        return torch.FloatTensor(batch)
    elif isinstance(batch[0], string_classes):
        return batch
    elif isinstance(batch[0], collections.Mapping):
        return {key: default_collate_with_string([d[key] for d in batch]) for key in batch[0]}
    elif isinstance(batch[0], collections.Sequence):
        transposed = zip(*batch)
        return [default_collate_with_string(samples) for samples in transposed]

    raise TypeError(("batch must contain tensors, numbers, dicts or lists; found {}"
                     .format(type(batch[0]))))