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Add random subsampling for IVF methods #2077

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merged 11 commits into from
Jan 23, 2024
Merged

Add random subsampling for IVF methods #2077

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a455b08
Add random subsampling for IVF methods
tfeher Jan 3, 2024
ee39ddc
fix style
tfeher Jan 3, 2024
ca3eec7
Fix IdxT
tfeher Jan 18, 2024
2ee6aff
remove random_seed parameter
tfeher Jan 18, 2024
abf68a6
Remove strided subsampling
tfeher Jan 18, 2024
7cfd9b5
Use managed memory for the new temprorary buffer
tfeher Jan 18, 2024
5485557
Batched index gather overlapped with H2D copies
tfeher Jan 20, 2024
9177356
Fix copyright year
tfeher Jan 21, 2024
790c0e6
Fix nvtx markers
tfeher Jan 21, 2024
8223259
replace thrust call with map_offset
tfeher Jan 23, 2024
f431ae7
Remove unused copy_warped
tfeher Jan 23, 2024
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Remove strided subsampling
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@tfeher
tfeher committed Jan 21, 2024
commit abf68a627f76d4b3f2601d50f465455ad9cc29f4
14 changes: 3 additions & 11 deletions cpp/include/raft/spatial/knn/detail/ann_utils.cuh
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Original file line number Diff line number Diff line change
Expand Up @@ -618,17 +618,9 @@ void subsample(raft::resources const& res,
{
IdxT n_dim = output.extent(1);
IdxT n_train = output.extent(0);
if (seed == -1 || n_train == n_samples) {
IdxT trainset_ratio = n_samples / n_train;
RAFT_LOG_INFO("Fixed stride subsampling");
RAFT_CUDA_TRY(cudaMemcpy2DAsync(output.data_handle(),
sizeof(T) * n_dim,
input,
sizeof(T) * n_dim * trainset_ratio,
sizeof(T) * n_dim,
n_train,
cudaMemcpyDefault,
resource::get_cuda_stream(res)));
if (n_train == n_samples) {
RAFT_LOG_INFO("No subsampling");
raft::copy(output.data_handle(), input, n_dim * n_samples, resource::get_cuda_stream(res));
return;
}
RAFT_LOG_DEBUG("Random subsampling");
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