mirror of
https://github.com/facebookresearch/faiss.git
synced 2025-06-03 21:54:02 +08:00
a8118acbc5
Changelog: - changed license: BSD+Patents -> MIT - propagates exceptions raised in sub-indexes of IndexShards and IndexReplicas - support for searching several inverted lists in parallel (parallel_mode != 0) - better support for PQ codes where nbit != 8 or 16 - IVFSpectralHash implementation: spectral hash codes inside an IVF - 6-bit per component scalar quantizer (4 and 8 bit were already supported) - combinations of inverted lists: HStackInvertedLists and VStackInvertedLists - configurable number of threads for OnDiskInvertedLists prefetching (including 0=no prefetch) - more test and demo code compatible with Python 3 (print with parentheses) - refactored benchmark code: data loading is now in a single file
45 lines
1.1 KiB
C++
45 lines
1.1 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 <cuda.h>
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#if CUDA_VERSION >= 8000
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// Whether or not we enable usage of CUDA Unified Memory
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#define FAISS_UNIFIED_MEM 1
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#endif
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namespace faiss { namespace gpu {
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enum MemorySpace {
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/// Managed using cudaMalloc/cudaFree
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Device = 1,
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/// Managed using cudaMallocManaged/cudaFree
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Unified = 2,
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/// Managed using cudaHostAlloc/cudaFreeHost
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HostPinned = 3,
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};
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/// All memory allocations and de-allocations come through these functions
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/// Allocates CUDA memory for a given memory space (void pointer)
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/// Throws a FaissException if we are unable to allocate the memory
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void allocMemorySpaceV(MemorySpace space, void** p, size_t size);
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template <typename T>
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inline void allocMemorySpace(MemorySpace space, T** p, size_t size) {
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allocMemorySpaceV(space, (void**)(void*) p, size);
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}
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/// Frees CUDA memory for a given memory space
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/// Asserts if we are unable to free the region
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void freeMemorySpace(MemorySpace space, void* p);
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} }
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