Add warning for unused GPU when n_clusters < n_ranks in batch all_neighbors#1072
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rapids-bot[bot] merged 11 commits intorapidsai:branch-25.08from Jul 23, 2025
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jinsolp
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| "Rank %d is not used for computation. This happens because the total number of ranks (%d) " | ||
| "> n_clusters (%lu). Consider increasing n_clusters or reduce the number of GPUs for " | ||
| "better utilization.", |
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In MG all_neighbors, some GPUs stay idle when
n_clusters < n_ranks(this is the expected behavior). Adding warning to let users know that they are not fully using all GPUs and providing directions for better utilization.