IVF-PQ: low-precision coarse search #715
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achirkin
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feature request
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Enable low-precision (half / int8) element type for use in the cuBLAS GEMM performed during coarse search (select clusters to probe). This makes cuBLAS use tensor cores and thus speeds up the coarse search.
Also propagate
kMaxQueriescompile time constant to a runtime search parameter: this allows to improve GPU utilization in extremely large batch size case, such as using IVF-PQ for constructing a nearest-neighbor graph for the whole dataset.