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IVFFlat.cuh
/**
* Copyright (c) 2015-present, Facebook, Inc.
* All rights reserved.
*
* This source code is licensed under the BSD+Patents license found in the
* LICENSE file in the root directory of this source tree.
*/
// Copyright 2004-present Facebook. All Rights Reserved.
#pragma once
#include "IVFBase.cuh"
namespace faiss { namespace gpu {
class IVFFlat : public IVFBase {
public:
/// Construct from a quantizer that has elemen
IVFFlat(GpuResources* resources,
/// We do not own this reference
FlatIndex* quantizer,
bool l2Distance,
bool useFloat16,
IndicesOptions indicesOptions,
MemorySpace space);
~IVFFlat() override;
/// Add vectors to a specific list; the input data can be on the
/// host or on our current device
void addCodeVectorsFromCpu(int listId,
const float* vecs,
const long* indices,
size_t numVecs);
/// Adds the given vectors to this index.
/// The input data must be on our current device.
/// Returns the number of vectors successfully added. Vectors may
/// not be able to be added because they contain NaNs.
int classifyAndAddVectors(Tensor<float, 2, true>& vecs,
Tensor<long, 1, true>& indices);
/// Find the approximate k nearest neigbors for `queries` against
/// our database
void query(Tensor<float, 2, true>& queries,
int nprobe,
int k,
Tensor<float, 2, true>& outDistances,
Tensor<long, 2, true>& outIndices);
/// Return the vectors of a particular list back to the CPU
std::vector<float> getListVectors(int listId) const;
private:
/// Returns the size of our stored vectors, in bytes
size_t getVectorMemorySize() const;
private:
/// Calculating L2 distance or inner product?
const bool l2Distance_;
/// Do we store data internally as float16 (versus float32)?
const bool useFloat16_;
};
} } // namespace
faiss::gpu::IVFFlat
Definition: IVFFlat.cuh:17
faiss::gpu::FlatIndex
Holder of GPU resources for a particular flat index.
Definition: FlatIndex.cuh:23
faiss::gpu::IVFBase
Base inverted list functionality for IVFFlat and IVFPQ.
Definition: IVFBase.cuh:27
faiss::gpu::GpuResources
Definition: GpuResources.h:23
faiss::gpu::IVFFlat::IVFFlat
IVFFlat(GpuResources *resources, FlatIndex *quantizer, bool l2Distance, bool useFloat16, IndicesOptions indicesOptions, MemorySpace space)
Construct from a quantizer that has elemen.
Definition: IVFFlat.cu:29
faiss::gpu::IVFFlat::classifyAndAddVectors
int classifyAndAddVectors(Tensor< float, 2, true > &vecs, Tensor< long, 1, true > &indices)
Definition: IVFFlat.cu:129
faiss::gpu::Tensor
Our tensor type.
Definition: Tensor.cuh:30
faiss::gpu::IVFFlat::addCodeVectorsFromCpu
void addCodeVectorsFromCpu(int listId, const float *vecs, const long *indices, size_t numVecs)
Definition: IVFFlat.cu:54
faiss::gpu::IVFFlat::query
void query(Tensor< float, 2, true > &queries, int nprobe, int k, Tensor< float, 2, true > &outDistances, Tensor< long, 2, true > &outIndices)
Definition: IVFFlat.cu:287
faiss::gpu::IVFFlat::getListVectors
std::vector< float > getListVectors(int listId) const
Return the vectors of a particular list back to the CPU.
Definition: IVFFlat.cu:353