如何在Pytorch中使用CUDA流？

s1 = torch.cuda.Stream()s2 = torch.cuda.Stream()# Initialise cuda tensors here. E.g.:A = torch.rand(1000, 1000, device = ‘cuda’)B = torch.rand(1000, 1000, device = ‘cuda’)# Wait for the above tensors to initialise.torch.cuda.synchronize()with torch.cuda.stream(s1):    C = torch.mm(A, A)with torch.cuda.stream(s2):    D = torch.mm(B, B)# Wait for C and D to be computed.torch.cuda.synchronize()# Do stuff with C and D.