`compute_jaccard_distance` function failing on multi-gpu

[toshalpatel]

Using compute_jaccard_distance function defined in faiss_rerank.py. The search_option variable is hard coded to 2, which uses multiple GPUs if the machine has any.

The final jaccard distance is incorrect as each value is the same (some number), whereas when i use search_option = None, i.e., CPU option, the jaccard distance makes sense.

I am using RTX 3090 GPU.

Can you please help me check if there is some issue?
Thanks!