test.py

import dgl
import dgl.backend as F
import torch

g = dgl.rand_graph(10, 15).int().to(torch.device(0))
gidx = g._graph
u = torch.rand((10, 2, 8), device=torch.device(0))
v = torch.rand((10, 2, 8), device=torch.device(0))
e = dgl.ops.gsddmm(g, "dot", u, v)
print(e)
e = torch.zeros((15, 2, 1), device=torch.device(0))
u = F.zerocopy_to_dgl_ndarray(u)
v = F.zerocopy_to_dgl_ndarray(v)
e = F.zerocopy_to_dgl_ndarray_for_write(e)
dgl.sparse._CAPI_FG_LoadModule("../build/featgraph/libfeatgraph_kernels.so")
dgl.sparse._CAPI_FG_SDDMMTreeReduction(gidx, u, v, e)
print(e)