91 lines
2.1 KiB
C++
91 lines
2.1 KiB
C++
/**
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* Copyright (c) Facebook, Inc. and its affiliates.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*/
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#pragma once
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#include <faiss/gpu/GpuIndex.h>
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#include <faiss/gpu/GpuIndexFlat.h>
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#include <faiss/gpu/GpuIndicesOptions.h>
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#include <faiss/Clustering.h>
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namespace faiss { struct IndexIVF; }
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namespace faiss { namespace gpu {
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class GpuIndexFlat;
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class GpuResources;
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struct GpuIndexIVFConfig : public GpuIndexConfig {
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inline GpuIndexIVFConfig()
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: indicesOptions(INDICES_64_BIT) {
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}
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/// Index storage options for the GPU
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IndicesOptions indicesOptions;
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/// Configuration for the coarse quantizer object
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GpuIndexFlatConfig flatConfig;
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};
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class GpuIndexIVF : public GpuIndex {
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public:
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GpuIndexIVF(GpuResources* resources,
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int dims,
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faiss::MetricType metric,
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float metricArg,
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int nlist,
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GpuIndexIVFConfig config = GpuIndexIVFConfig());
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~GpuIndexIVF() override;
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private:
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/// Shared initialization functions
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void init_();
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public:
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/// Copy what we need from the CPU equivalent
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void copyFrom(const faiss::IndexIVF* index);
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/// Copy what we have to the CPU equivalent
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void copyTo(faiss::IndexIVF* index) const;
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/// Returns the number of inverted lists we're managing
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int getNumLists() const;
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/// Return the quantizer we're using
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GpuIndexFlat* getQuantizer();
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/// Sets the number of list probes per query
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void setNumProbes(int nprobe);
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/// Returns our current number of list probes per query
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int getNumProbes() const;
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protected:
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bool addImplRequiresIDs_() const override;
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void trainQuantizer_(faiss::Index::idx_t n, const float* x);
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public:
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/// Exposing this like the CPU version for manipulation
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ClusteringParameters cp;
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/// Exposing this like the CPU version for query
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int nlist;
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/// Exposing this like the CPU version for manipulation
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int nprobe;
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/// Exposeing this like the CPU version for query
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GpuIndexFlat* quantizer;
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protected:
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GpuIndexIVFConfig ivfConfig_;
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};
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} } // namespace
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