[Feature] Add gather/scatter support 1D tensor #74
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linhu-nv
added
feature request
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/ok to test |
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@chang-l looks like you have a check style failure here too |
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@alexbarghi-nv I think it should be fixed now. Can you pls kick off the CI again? |
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/ok to test |
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/merge |
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/merge |
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/merge |
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Migrated from: rapidsai/wholegraph#229
This PR is to add gather/scatter support 1D tensor on python level, as WholeGraph should support basic indexing operations for both 1D (array) and 2D (matrix) wholememory tensors. Without this PR, if with 1D wholememory tensor, gather/scatter op does not work, e.g., https://github.com/rapidsai/wholegraph/blob/0efba33835d6e4e104b5d7101a91e0ea55a6ca53/python/pylibwholegraph/pylibwholegraph/torch/tensor.py#L89
To test, run
Remaining issue:
On my local test with single GPU, the test can pass.
For multiGPU setup, gather op works fine, but 1D scatter seems not working as it would crash at:
https://github.com/rapidsai/wholegraph/blob/2e963b98aa6027c300d60e839010d3dd8ca422eb/python/pylibwholegraph/pylibwholegraph/tests/wholegraph_torch/ops/test_wholegraph_gather_scatter.py#L108 with incorrect scatter outputs:
Indices where allclose fails: tensor([0., 0., 0., ..., 0., 0., 0.]) tensor([ 1435., 1439., 1443., ..., 257703., 257707., 257711.])This would work if this bugfix is merged: #73
cc. @linhu-nv