Skip to content

Align views with partial batch extents for SNMG ANN direct merge #2441

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Open
viclafargue wants to merge 1 commit into
base: main
Choose a base branch
from
+15 −4
Open

Align views with partial batch extents for SNMG ANN direct merge #2441

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
19 changes: 15 additions & 4 deletions cpp/src/neighbors/mg/snmg.cuh
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -355,11 +355,22 @@ void sharded_search_with_direct_merge(
d_trans.view(),
raft::make_host_vector_view<const searchIdxT>(h_trans.data(), index.num_ranks_));

// Results from each rank are packed using the current batch size. Use matching logical views
// so the final partial batch is merged with the same per-rank stride used above.
auto in_distances_batch = raft::make_device_matrix_view<const float, int64_t, row_major>(
in_distances.data_handle(), index.num_ranks_ * n_rows_of_current_batch, n_neighbors);
auto in_neighbors_batch = raft::make_device_matrix_view<const searchIdxT, int64_t, row_major>(
in_neighbors.data_handle(), index.num_ranks_ * n_rows_of_current_batch, n_neighbors);
auto out_distances_batch = raft::make_device_matrix_view<float, int64_t, row_major>(
out_distances.data_handle(), n_rows_of_current_batch, n_neighbors);
auto out_neighbors_batch = raft::make_device_matrix_view<searchIdxT, int64_t, row_major>(
out_neighbors.data_handle(), n_rows_of_current_batch, n_neighbors);

knn_merge_parts(root_handle_,
in_distances.view(),
in_neighbors.view(),
out_distances.view(),
out_neighbors.view(),
in_distances_batch,
in_neighbors_batch,
out_distances_batch,
out_neighbors_batch,
d_trans.view());

raft::copy(
Expand Down
Loading