amirunpri2018/pytorch-extension

an example of a CUDA extension for PyTorch using CuPy which computes the Hadamard product of two tensors

pytorch-extension

This is an example of a CUDA extension for PyTorch which uses CuPy to compute the Hadamard product of two tensors.

For a more advanced PyTorch extension that uses CuPy as well, please see: https://github.com/szagoruyko/pyinn

setup

Make sure to install CuPy, which can be done using pip install cupy or alternatively using one of the provided binary packages as outlined in the CuPy repository.

usage

There is no separate build process necessary, simply run python test.py to test it. A minimal example of how the sample extension can be used is also shown below.

import torch

import hadamard

class Network(torch.nn.Module):
	def __init__(self):
		super(Network, self).__init__()
	# end

	def forward(self, input1, input2):
		return hadamard.Hadamard()(input1, input2)
	# end
# end

net = Network().cuda()

input1 = torch.rand(64, 3, 128, 128).cuda()
input2 = torch.rand(64, 3, 128, 128).cuda()

input1 = input1.requires_grad_()
input2 = input2.requires_grad_()

output = net(input1, input2)
expected = torch.mul(input1, input2)

print(torch.sum(output.data - expected.data), '<-- should be 0.0')

license

Please refer to the appropriate file within this repository.