torch.cuda.comm.reduce_add¶

torch.cuda.comm.reduce_add(inputs, destination=None)[source]¶

Sums tensors from multiple GPUs.

All inputs should have matching shapes, dtype, and layout. The output tensor will be of the same shape, dtype, and layout.

Parameters:

inputs (Iterable[Tensor]) – an iterable of tensors to add.
destination (int, optional) – a device on which the output will be placed (default: current device).

Returns:

A tensor containing an elementwise sum of all inputs, placed on the destination device.

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