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< title > Faiss: /data/users/matthijs/github_faiss/faiss/gpu/GpuIndex.cu Source File< / title >
2017-02-23 06:26:44 +08:00
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< div class = "fragment" > < div class = "line" > < a name = "l00001" > < / a > < span class = "lineno" > 1< / span >   < span class = "comment" > /**< / span > < / div >
< div class = "line" > < a name = "l00002" > < / a > < span class = "lineno" > 2< / span >   < span class = "comment" > * Copyright (c) 2015-present, Facebook, Inc.< / span > < / div >
< div class = "line" > < a name = "l00003" > < / a > < span class = "lineno" > 3< / span >   < span class = "comment" > * All rights reserved.< / span > < / div >
< div class = "line" > < a name = "l00004" > < / a > < span class = "lineno" > 4< / span >   < span class = "comment" > *< / span > < / div >
< div class = "line" > < a name = "l00005" > < / a > < span class = "lineno" > 5< / span >   < span class = "comment" > * This source code is licensed under the CC-by-NC license found in the< / span > < / div >
< div class = "line" > < a name = "l00006" > < / a > < span class = "lineno" > 6< / span >   < span class = "comment" > * LICENSE file in the root directory of this source tree.< / span > < / div >
< div class = "line" > < a name = "l00007" > < / a > < span class = "lineno" > 7< / span >   < span class = "comment" > */< / span > < / div >
< div class = "line" > < a name = "l00008" > < / a > < span class = "lineno" > 8< / span >   < / div >
< div class = "line" > < a name = "l00009" > < / a > < span class = "lineno" > 9< / span >   < span class = "comment" > // Copyright 2004-present Facebook. All Rights Reserved.< / span > < / div >
< div class = "line" > < a name = "l00010" > < / a > < span class = "lineno" > 10< / span >   < / div >
< div class = "line" > < a name = "l00011" > < / a > < span class = "lineno" > 11< / span >   < span class = "preprocessor" > #include " GpuIndex.h" < / span > < / div >
< div class = "line" > < a name = "l00012" > < / a > < span class = "lineno" > 12< / span >   < span class = "preprocessor" > #include " ../FaissAssert.h" < / span > < / div >
< div class = "line" > < a name = "l00013" > < / a > < span class = "lineno" > 13< / span >   < span class = "preprocessor" > #include " GpuResources.h" < / span > < / div >
< div class = "line" > < a name = "l00014" > < / a > < span class = "lineno" > 14< / span >   < span class = "preprocessor" > #include " utils/DeviceUtils.h" < / span > < / div >
< div class = "line" > < a name = "l00015" > < / a > < span class = "lineno" > 15< / span >   < span class = "preprocessor" > #include < stdio.h> < / span > < / div >
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< div class = "line" > < a name = "l00016" > < / a > < span class = "lineno" > 16< / span >   < / div >
< div class = "line" > < a name = "l00017" > < / a > < span class = "lineno" > 17< / span >   < span class = "keyword" > namespace < / span > faiss { < span class = "keyword" > namespace < / span > gpu {< / div >
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< div class = "line" > < a name = "l00018" > < / a > < span class = "lineno" > 18< / span >   < / div >
< div class = "line" > < a name = "l00019" > < / a > < span class = "lineno" > 19< / span >   < span class = "comment" > // Default size for which we page add or search< / span > < / div >
< div class = "line" > < a name = "l00020" > < / a > < span class = "lineno" > 20< / span >   constexpr < span class = "keywordtype" > size_t< / span > kAddPageSize = (size_t) 256 * 1024 * 1024;< / div >
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< div class = "line" > < a name = "l00021" > < / a > < span class = "lineno" > 21< / span >   constexpr < span class = "keywordtype" > size_t< / span > kSearchPageSize = (size_t) 256 * 1024 * 1024;< / div >
< div class = "line" > < a name = "l00022" > < / a > < span class = "lineno" > 22< / span >   < / div >
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< div class = "line" > < a name = "l00023" > < / a > < span class = "lineno" > 23< / span >   < span class = "comment" > // Or, maximum number of vectors to consider per page of add or search< / span > < / div >
< div class = "line" > < a name = "l00024" > < / a > < span class = "lineno" > 24< / span >   constexpr < span class = "keywordtype" > size_t< / span > kAddVecSize = (size_t) 512 * 1024;< / div >
< div class = "line" > < a name = "l00025" > < / a > < span class = "lineno" > 25< / span >   < / div >
< div class = "line" > < a name = "l00026" > < / a > < span class = "lineno" > 26< / span >   < span class = "comment" > // Use a smaller search size, as precomputed code usage on IVFPQ< / span > < / div >
< div class = "line" > < a name = "l00027" > < / a > < span class = "lineno" > 27< / span >   < span class = "comment" > // requires substantial amounts of memory< / span > < / div >
< div class = "line" > < a name = "l00028" > < / a > < span class = "lineno" > 28< / span >   < span class = "comment" > // FIXME: parameterize based on algorithm need< / span > < / div >
< div class = "line" > < a name = "l00029" > < / a > < span class = "lineno" > 29< / span >   constexpr < span class = "keywordtype" > size_t< / span > kSearchVecSize = (size_t) 32 * 1024;< / div >
< div class = "line" > < a name = "l00030" > < / a > < span class = "lineno" > 30< / span >   < / div >
< div class = "line" > < a name = "l00031" > < / a > < span class = "lineno" > 31< / span >   GpuIndex::GpuIndex(GpuResources* resources,< / div >
< div class = "line" > < a name = "l00032" > < / a > < span class = "lineno" > 32< / span >   < span class = "keywordtype" > int< / span > dims,< / div >
< div class = "line" > < a name = "l00033" > < / a > < span class = "lineno" > 33< / span >   < a class = "code" href = "namespacefaiss.html#afd12191c638da74760ff397cf319752c" > faiss::MetricType< / a > metric,< / div >
< div class = "line" > < a name = "l00034" > < / a > < span class = "lineno" > 34< / span >   GpuIndexConfig config) :< / div >
< div class = "line" > < a name = "l00035" > < / a > < span class = "lineno" > 35< / span >   Index(dims, metric),< / div >
< div class = "line" > < a name = "l00036" > < / a > < span class = "lineno" > 36< / span >   resources_(resources),< / div >
< div class = "line" > < a name = "l00037" > < / a > < span class = "lineno" > 37< / span >   device_(config.device),< / div >
< div class = "line" > < a name = "l00038" > < / a > < span class = "lineno" > 38< / span >   memorySpace_(config.memorySpace) {< / div >
< div class = "line" > < a name = "l00039" > < / a > < span class = "lineno" > 39< / span >   FAISS_THROW_IF_NOT_FMT(device_ < getNumDevices(),< / div >
< div class = "line" > < a name = "l00040" > < / a > < span class = "lineno" > 40< / span >   < span class = "stringliteral" > " Invalid GPU device %d" < / span > , device_);< / div >
< div class = "line" > < a name = "l00041" > < / a > < span class = "lineno" > 41< / span >   < / div >
< div class = "line" > < a name = "l00042" > < / a > < span class = "lineno" > 42< / span >   FAISS_THROW_IF_NOT_MSG(dims > 0, < span class = "stringliteral" > " Invalid number of dimensions" < / span > );< / div >
< div class = "line" > < a name = "l00043" > < / a > < span class = "lineno" > 43< / span >   < / div >
< div class = "line" > < a name = "l00044" > < / a > < span class = "lineno" > 44< / span >   < span class = "preprocessor" > #ifdef FAISS_UNIFIED_MEM< / span > < / div >
< div class = "line" > < a name = "l00045" > < / a > < span class = "lineno" > 45< / span >   < span class = "preprocessor" > < / span > FAISS_THROW_IF_NOT_FMT(< / div >
< div class = "line" > < a name = "l00046" > < / a > < span class = "lineno" > 46< / span >   memorySpace_ == MemorySpace::Device ||< / div >
< div class = "line" > < a name = "l00047" > < / a > < span class = "lineno" > 47< / span >   (memorySpace_ == MemorySpace::Unified & & < / div >
< div class = "line" > < a name = "l00048" > < / a > < span class = "lineno" > 48< / span >   getFullUnifiedMemSupport(device_)),< / div >
< div class = "line" > < a name = "l00049" > < / a > < span class = "lineno" > 49< / span >   < span class = "stringliteral" > " Device %d does not support full CUDA 8 Unified Memory (CC 6.0+)" < / span > ,< / div >
< div class = "line" > < a name = "l00050" > < / a > < span class = "lineno" > 50< / span >   config.device);< / div >
< div class = "line" > < a name = "l00051" > < / a > < span class = "lineno" > 51< / span >   < span class = "preprocessor" > #else< / span > < / div >
< div class = "line" > < a name = "l00052" > < / a > < span class = "lineno" > 52< / span >   < span class = "preprocessor" > < / span > FAISS_THROW_IF_NOT_MSG(memorySpace_ == MemorySpace::Device,< / div >
< div class = "line" > < a name = "l00053" > < / a > < span class = "lineno" > 53< / span >   < span class = "stringliteral" > " Must compile with CUDA 8+ for Unified Memory support" < / span > );< / div >
< div class = "line" > < a name = "l00054" > < / a > < span class = "lineno" > 54< / span >   < span class = "preprocessor" > #endif< / span > < / div >
< div class = "line" > < a name = "l00055" > < / a > < span class = "lineno" > 55< / span >   < span class = "preprocessor" > < / span > < / div >
< div class = "line" > < a name = "l00056" > < / a > < span class = "lineno" > 56< / span >   FAISS_ASSERT(resources_);< / div >
< div class = "line" > < a name = "l00057" > < / a > < span class = "lineno" > 57< / span >   resources_-> initializeForDevice(device_);< / div >
< div class = "line" > < a name = "l00058" > < / a > < span class = "lineno" > 58< / span >   }< / div >
< div class = "line" > < a name = "l00059" > < / a > < span class = "lineno" > 59< / span >   < / div >
< div class = "line" > < a name = "l00060" > < / a > < span class = "lineno" > 60< / span >   < span class = "keywordtype" > void< / span > < / div >
< div class = "line" > < a name = "l00061" > < / a > < span class = "lineno" > < a class = "line" href = "classfaiss_1_1gpu_1_1GpuIndex.html#af576341f6996b0e80e26b9748db51eb7" > 61< / a > < / span >   < a class = "code" href = "classfaiss_1_1gpu_1_1GpuIndex.html#af576341f6996b0e80e26b9748db51eb7" > GpuIndex::add< / a > (< a class = "code" href = "structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4" > Index::idx_t< / a > n, < span class = "keyword" > const< / span > < span class = "keywordtype" > float< / span > * x) {< / div >
< div class = "line" > < a name = "l00062" > < / a > < span class = "lineno" > 62< / span >   < a class = "code" href = "classfaiss_1_1gpu_1_1GpuIndex.html#a90a4b0c76c15512d1d231383c404d8d2" > addInternal_< / a > (n, x, < span class = "keyword" > nullptr< / span > );< / div >
< div class = "line" > < a name = "l00063" > < / a > < span class = "lineno" > 63< / span >   }< / div >
< div class = "line" > < a name = "l00064" > < / a > < span class = "lineno" > 64< / span >   < / div >
< div class = "line" > < a name = "l00065" > < / a > < span class = "lineno" > 65< / span >   < span class = "keywordtype" > void< / span > < / div >
< div class = "line" > < a name = "l00066" > < / a > < span class = "lineno" > < a class = "line" href = "classfaiss_1_1gpu_1_1GpuIndex.html#a47f6969fe60d82b8e3407557ba9eec88" > 66< / a > < / span >   < a class = "code" href = "classfaiss_1_1gpu_1_1GpuIndex.html#a47f6969fe60d82b8e3407557ba9eec88" > GpuIndex::add_with_ids< / a > (< a class = "code" href = "structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4" > Index::idx_t< / a > n,< / div >
< div class = "line" > < a name = "l00067" > < / a > < span class = "lineno" > 67< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > float< / span > * x,< / div >
< div class = "line" > < a name = "l00068" > < / a > < span class = "lineno" > 68< / span >   < span class = "keyword" > const< / span > < a class = "code" href = "structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4" > Index::idx_t< / a > * ids) {< / div >
< div class = "line" > < a name = "l00069" > < / a > < span class = "lineno" > 69< / span >   < a class = "code" href = "classfaiss_1_1gpu_1_1GpuIndex.html#a90a4b0c76c15512d1d231383c404d8d2" > addInternal_< / a > (n, x, ids);< / div >
< div class = "line" > < a name = "l00070" > < / a > < span class = "lineno" > 70< / span >   }< / div >
< div class = "line" > < a name = "l00071" > < / a > < span class = "lineno" > 71< / span >   < / div >
< div class = "line" > < a name = "l00072" > < / a > < span class = "lineno" > 72< / span >   < span class = "keywordtype" > void< / span > < / div >
< div class = "line" > < a name = "l00073" > < / a > < span class = "lineno" > < a class = "line" href = "classfaiss_1_1gpu_1_1GpuIndex.html#a90a4b0c76c15512d1d231383c404d8d2" > 73< / a > < / span >   < a class = "code" href = "classfaiss_1_1gpu_1_1GpuIndex.html#a90a4b0c76c15512d1d231383c404d8d2" > GpuIndex::addInternal_< / a > (< a class = "code" href = "structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4" > Index::idx_t< / a > n,< / div >
< div class = "line" > < a name = "l00074" > < / a > < span class = "lineno" > 74< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > float< / span > * x,< / div >
< div class = "line" > < a name = "l00075" > < / a > < span class = "lineno" > 75< / span >   < span class = "keyword" > const< / span > < a class = "code" href = "structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4" > Index::idx_t< / a > * ids) {< / div >
< div class = "line" > < a name = "l00076" > < / a > < span class = "lineno" > 76< / span >   < a class = "code" href = "classfaiss_1_1gpu_1_1DeviceScope.html" > DeviceScope< / a > scope(< a class = "code" href = "classfaiss_1_1gpu_1_1GpuIndex.html#a67750633faa35677ee505a1e61cfe142" > device_< / a > );< / div >
< div class = "line" > < a name = "l00077" > < / a > < span class = "lineno" > 77< / span >   < / div >
< div class = "line" > < a name = "l00078" > < / a > < span class = "lineno" > 78< / span >   FAISS_THROW_IF_NOT_MSG(this-> < a class = "code" href = "structfaiss_1_1Index.html#a6e92732617c4dbe364e7678dd8773a7f" > is_trained< / a > , < span class = "stringliteral" > " Index not trained" < / span > );< / div >
< div class = "line" > < a name = "l00079" > < / a > < span class = "lineno" > 79< / span >   < / div >
< div class = "line" > < a name = "l00080" > < / a > < span class = "lineno" > 80< / span >   < span class = "keywordflow" > if< / span > (n > 0) {< / div >
< div class = "line" > < a name = "l00081" > < / a > < span class = "lineno" > 81< / span >   < span class = "keywordtype" > size_t< / span > totalSize = n * (size_t) this-> < a class = "code" href = "structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d" > d< / a > * < span class = "keyword" > sizeof< / span > (< span class = "keywordtype" > float< / span > );< / div >
< div class = "line" > < a name = "l00082" > < / a > < span class = "lineno" > 82< / span >   < / div >
< div class = "line" > < a name = "l00083" > < / a > < span class = "lineno" > 83< / span >   < span class = "keywordflow" > if< / span > (totalSize > kAddPageSize || n > kAddVecSize) {< / div >
< div class = "line" > < a name = "l00084" > < / a > < span class = "lineno" > 84< / span >   < span class = "comment" > // How many vectors fit into kAddPageSize?< / span > < / div >
< div class = "line" > < a name = "l00085" > < / a > < span class = "lineno" > 85< / span >   < span class = "keywordtype" > size_t< / span > maxNumVecsForPageSize =< / div >
< div class = "line" > < a name = "l00086" > < / a > < span class = "lineno" > 86< / span >   kAddPageSize / ((size_t) this-> < a class = "code" href = "structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d" > d< / a > * < span class = "keyword" > sizeof< / span > (< span class = "keywordtype" > float< / span > ));< / div >
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< div class = "line" > < a name = "l00087" > < / a > < span class = "lineno" > 87< / span >   < / div >
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< div class = "line" > < a name = "l00088" > < / a > < span class = "lineno" > 88< / span >   < span class = "comment" > // Always add at least 1 vector, if we have huge vectors< / span > < / div >
< div class = "line" > < a name = "l00089" > < / a > < span class = "lineno" > 89< / span >   maxNumVecsForPageSize = std::max(maxNumVecsForPageSize, (< span class = "keywordtype" > size_t< / span > ) 1);< / div >
2017-04-06 19:33:41 +08:00
< div class = "line" > < a name = "l00090" > < / a > < span class = "lineno" > 90< / span >   < / div >
2017-06-21 21:54:28 +08:00
< div class = "line" > < a name = "l00091" > < / a > < span class = "lineno" > 91< / span >   < span class = "keywordtype" > size_t< / span > tileSize = std::min((< span class = "keywordtype" > size_t< / span > ) n, maxNumVecsForPageSize);< / div >
< div class = "line" > < a name = "l00092" > < / a > < span class = "lineno" > 92< / span >   tileSize = std::min(tileSize, kSearchVecSize);< / div >
< div class = "line" > < a name = "l00093" > < / a > < span class = "lineno" > 93< / span >   < / div >
< div class = "line" > < a name = "l00094" > < / a > < span class = "lineno" > 94< / span >   < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > size_t< / span > i = 0; i < n; i += tileSize) {< / div >
< div class = "line" > < a name = "l00095" > < / a > < span class = "lineno" > 95< / span >   < span class = "keywordtype" > size_t< / span > curNum = std::min(tileSize, n - i);< / div >
< div class = "line" > < a name = "l00096" > < / a > < span class = "lineno" > 96< / span >   < / div >
< div class = "line" > < a name = "l00097" > < / a > < span class = "lineno" > 97< / span >   < a class = "code" href = "classfaiss_1_1gpu_1_1GpuIndex.html#a345819c6214c2a6eb7874dde1145036f" > addImpl_< / a > (curNum,< / div >
< div class = "line" > < a name = "l00098" > < / a > < span class = "lineno" > 98< / span >   x + i * (< span class = "keywordtype" > size_t< / span > ) this-> < a class = "code" href = "structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d" > d< / a > ,< / div >
< div class = "line" > < a name = "l00099" > < / a > < span class = "lineno" > 99< / span >   ids ? ids + i : < span class = "keyword" > nullptr< / span > );< / div >
< div class = "line" > < a name = "l00100" > < / a > < span class = "lineno" > 100< / span >   }< / div >
< div class = "line" > < a name = "l00101" > < / a > < span class = "lineno" > 101< / span >   } < span class = "keywordflow" > else< / span > {< / div >
< div class = "line" > < a name = "l00102" > < / a > < span class = "lineno" > 102< / span >   < a class = "code" href = "classfaiss_1_1gpu_1_1GpuIndex.html#a345819c6214c2a6eb7874dde1145036f" > addImpl_< / a > (n, x, ids);< / div >
< div class = "line" > < a name = "l00103" > < / a > < span class = "lineno" > 103< / span >   }< / div >
< div class = "line" > < a name = "l00104" > < / a > < span class = "lineno" > 104< / span >   }< / div >
< div class = "line" > < a name = "l00105" > < / a > < span class = "lineno" > 105< / span >   }< / div >
< div class = "line" > < a name = "l00106" > < / a > < span class = "lineno" > 106< / span >   < / div >
< div class = "line" > < a name = "l00107" > < / a > < span class = "lineno" > 107< / span >   < span class = "keywordtype" > void< / span > < / div >
< div class = "line" > < a name = "l00108" > < / a > < span class = "lineno" > < a class = "line" href = "classfaiss_1_1gpu_1_1GpuIndex.html#a6f1cadb5e8970c9c1fdf15eddb9d874f" > 108< / a > < / span >   < a class = "code" href = "classfaiss_1_1gpu_1_1GpuIndex.html#a6f1cadb5e8970c9c1fdf15eddb9d874f" > GpuIndex::search< / a > (< a class = "code" href = "structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4" > Index::idx_t< / a > n,< / div >
< div class = "line" > < a name = "l00109" > < / a > < span class = "lineno" > 109< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > float< / span > * x,< / div >
< div class = "line" > < a name = "l00110" > < / a > < span class = "lineno" > 110< / span >   < a class = "code" href = "structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4" > Index::idx_t< / a > k,< / div >
< div class = "line" > < a name = "l00111" > < / a > < span class = "lineno" > 111< / span >   < span class = "keywordtype" > float< / span > * distances,< / div >
< div class = "line" > < a name = "l00112" > < / a > < span class = "lineno" > 112< / span >   < a class = "code" href = "structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4" > Index::idx_t< / a > * labels)< span class = "keyword" > const < / span > {< / div >
< div class = "line" > < a name = "l00113" > < / a > < span class = "lineno" > 113< / span >   < a class = "code" href = "classfaiss_1_1gpu_1_1DeviceScope.html" > DeviceScope< / a > scope(< a class = "code" href = "classfaiss_1_1gpu_1_1GpuIndex.html#a67750633faa35677ee505a1e61cfe142" > device_< / a > );< / div >
< div class = "line" > < a name = "l00114" > < / a > < span class = "lineno" > 114< / span >   < / div >
< div class = "line" > < a name = "l00115" > < / a > < span class = "lineno" > 115< / span >   FAISS_THROW_IF_NOT_MSG(this-> < a class = "code" href = "structfaiss_1_1Index.html#a6e92732617c4dbe364e7678dd8773a7f" > is_trained< / a > , < span class = "stringliteral" > " Index not trained" < / span > );< / div >
< div class = "line" > < a name = "l00116" > < / a > < span class = "lineno" > 116< / span >   < / div >
< div class = "line" > < a name = "l00117" > < / a > < span class = "lineno" > 117< / span >   < span class = "keywordflow" > if< / span > (n > 0) {< / div >
< div class = "line" > < a name = "l00118" > < / a > < span class = "lineno" > 118< / span >   < span class = "keywordtype" > size_t< / span > totalSize = n * (size_t) this-> < a class = "code" href = "structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d" > d< / a > * < span class = "keyword" > sizeof< / span > (< span class = "keywordtype" > float< / span > );< / div >
< div class = "line" > < a name = "l00119" > < / a > < span class = "lineno" > 119< / span >   < / div >
< div class = "line" > < a name = "l00120" > < / a > < span class = "lineno" > 120< / span >   < span class = "keywordflow" > if< / span > ((totalSize > kSearchPageSize) || (n > kSearchVecSize)) {< / div >
< div class = "line" > < a name = "l00121" > < / a > < span class = "lineno" > 121< / span >   < span class = "comment" > // How many vectors fit into kSearchPageSize?< / span > < / div >
< div class = "line" > < a name = "l00122" > < / a > < span class = "lineno" > 122< / span >   < span class = "comment" > // Just consider `x`, not the size of `distances` or `labels`< / span > < / div >
< div class = "line" > < a name = "l00123" > < / a > < span class = "lineno" > 123< / span >   < span class = "comment" > // since they should be small, relatively speaking< / span > < / div >
< div class = "line" > < a name = "l00124" > < / a > < span class = "lineno" > 124< / span >   < span class = "keywordtype" > size_t< / span > maxNumVecsForPageSize =< / div >
< div class = "line" > < a name = "l00125" > < / a > < span class = "lineno" > 125< / span >   kSearchPageSize / ((size_t) this-> < a class = "code" href = "structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d" > d< / a > * < span class = "keyword" > sizeof< / span > (< span class = "keywordtype" > float< / span > ));< / div >
< div class = "line" > < a name = "l00126" > < / a > < span class = "lineno" > 126< / span >   < / div >
< div class = "line" > < a name = "l00127" > < / a > < span class = "lineno" > 127< / span >   < span class = "comment" > // Always search at least 1 vector, if we have huge vectors< / span > < / div >
< div class = "line" > < a name = "l00128" > < / a > < span class = "lineno" > 128< / span >   maxNumVecsForPageSize = std::max(maxNumVecsForPageSize, (< span class = "keywordtype" > size_t< / span > ) 1);< / div >
< div class = "line" > < a name = "l00129" > < / a > < span class = "lineno" > 129< / span >   < / div >
< div class = "line" > < a name = "l00130" > < / a > < span class = "lineno" > 130< / span >   < span class = "keywordtype" > size_t< / span > tileSize = std::min((< span class = "keywordtype" > size_t< / span > ) n, maxNumVecsForPageSize);< / div >
< div class = "line" > < a name = "l00131" > < / a > < span class = "lineno" > 131< / span >   tileSize = std::min(tileSize, kSearchVecSize);< / div >
< div class = "line" > < a name = "l00132" > < / a > < span class = "lineno" > 132< / span >   < / div >
< div class = "line" > < a name = "l00133" > < / a > < span class = "lineno" > 133< / span >   < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > size_t< / span > i = 0; i < n; i += tileSize) {< / div >
< div class = "line" > < a name = "l00134" > < / a > < span class = "lineno" > 134< / span >   < span class = "keywordtype" > size_t< / span > curNum = std::min(tileSize, n - i);< / div >
< div class = "line" > < a name = "l00135" > < / a > < span class = "lineno" > 135< / span >   < / div >
< div class = "line" > < a name = "l00136" > < / a > < span class = "lineno" > 136< / span >   < a class = "code" href = "classfaiss_1_1gpu_1_1GpuIndex.html#a482408e73bfa420d46eed690f2936e04" > searchImpl_< / a > (curNum,< / div >
< div class = "line" > < a name = "l00137" > < / a > < span class = "lineno" > 137< / span >   x + i * (< span class = "keywordtype" > size_t< / span > ) this-> < a class = "code" href = "structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d" > d< / a > ,< / div >
< div class = "line" > < a name = "l00138" > < / a > < span class = "lineno" > 138< / span >   k,< / div >
< div class = "line" > < a name = "l00139" > < / a > < span class = "lineno" > 139< / span >   distances + i * k,< / div >
< div class = "line" > < a name = "l00140" > < / a > < span class = "lineno" > 140< / span >   labels + i * k);< / div >
< div class = "line" > < a name = "l00141" > < / a > < span class = "lineno" > 141< / span >   }< / div >
< div class = "line" > < a name = "l00142" > < / a > < span class = "lineno" > 142< / span >   } < span class = "keywordflow" > else< / span > {< / div >
< div class = "line" > < a name = "l00143" > < / a > < span class = "lineno" > 143< / span >   < a class = "code" href = "classfaiss_1_1gpu_1_1GpuIndex.html#a482408e73bfa420d46eed690f2936e04" > searchImpl_< / a > (n, x, k, distances, labels);< / div >
< div class = "line" > < a name = "l00144" > < / a > < span class = "lineno" > 144< / span >   }< / div >
< div class = "line" > < a name = "l00145" > < / a > < span class = "lineno" > 145< / span >   }< / div >
< div class = "line" > < a name = "l00146" > < / a > < span class = "lineno" > 146< / span >   }< / div >
< div class = "line" > < a name = "l00147" > < / a > < span class = "lineno" > 147< / span >   < / div >
< div class = "line" > < a name = "l00148" > < / a > < span class = "lineno" > 148< / span >   } } < span class = "comment" > // namespace< / span > < / div >
< div class = "ttc" id = "classfaiss_1_1gpu_1_1GpuIndex_html_a6f1cadb5e8970c9c1fdf15eddb9d874f" > < div class = "ttname" > < a href = "classfaiss_1_1gpu_1_1GpuIndex.html#a6f1cadb5e8970c9c1fdf15eddb9d874f" > faiss::gpu::GpuIndex::search< / a > < / div > < div class = "ttdeci" > void search(faiss::Index::idx_t n, const float *x, faiss::Index::idx_t k, float *distances, faiss::Index::idx_t *labels) const override< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "GpuIndex_8cu_source.html#l00108" > GpuIndex.cu:108< / a > < / div > < / div >
2017-04-06 19:33:41 +08:00
< div class = "ttc" id = "classfaiss_1_1gpu_1_1GpuIndex_html_a482408e73bfa420d46eed690f2936e04" > < div class = "ttname" > < a href = "classfaiss_1_1gpu_1_1GpuIndex.html#a482408e73bfa420d46eed690f2936e04" > faiss::gpu::GpuIndex::searchImpl_< / a > < / div > < div class = "ttdeci" > virtual void searchImpl_(faiss::Index::idx_t n, const float *x, faiss::Index::idx_t k, float *distances, faiss::Index::idx_t *labels) const =0< / div > < div class = "ttdoc" > Overridden to actually perform the search. < / div > < / div >
2017-06-21 21:54:28 +08:00
< div class = "ttc" id = "classfaiss_1_1gpu_1_1GpuIndex_html_a90a4b0c76c15512d1d231383c404d8d2" > < div class = "ttname" > < a href = "classfaiss_1_1gpu_1_1GpuIndex.html#a90a4b0c76c15512d1d231383c404d8d2" > faiss::gpu::GpuIndex::addInternal_< / a > < / div > < div class = "ttdeci" > void addInternal_(Index::idx_t n, const float *x, const Index::idx_t *ids)< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "GpuIndex_8cu_source.html#l00073" > GpuIndex.cu:73< / a > < / div > < / div >
< div class = "ttc" id = "classfaiss_1_1gpu_1_1GpuIndex_html_a47f6969fe60d82b8e3407557ba9eec88" > < div class = "ttname" > < a href = "classfaiss_1_1gpu_1_1GpuIndex.html#a47f6969fe60d82b8e3407557ba9eec88" > faiss::gpu::GpuIndex::add_with_ids< / a > < / div > < div class = "ttdeci" > void add_with_ids(Index::idx_t n, const float *x, const Index::idx_t *ids) override< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "GpuIndex_8cu_source.html#l00066" > GpuIndex.cu:66< / a > < / div > < / div >
< div class = "ttc" id = "structfaiss_1_1Index_html_a2a002388d2c081c2dbab8508dcefe73d" > < div class = "ttname" > < a href = "structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d" > faiss::Index::d< / a > < / div > < div class = "ttdeci" > int d< / div > < div class = "ttdoc" > vector dimension < / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "Index_8h_source.html#l00064" > Index.h:64< / a > < / div > < / div >
< div class = "ttc" id = "classfaiss_1_1gpu_1_1GpuIndex_html_a67750633faa35677ee505a1e61cfe142" > < div class = "ttname" > < a href = "classfaiss_1_1gpu_1_1GpuIndex.html#a67750633faa35677ee505a1e61cfe142" > faiss::gpu::GpuIndex::device_< / a > < / div > < div class = "ttdeci" > const int device_< / div > < div class = "ttdoc" > The GPU device we are resident on. < / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "GpuIndex_8h_source.html#l00094" > GpuIndex.h:94< / a > < / div > < / div >
< div class = "ttc" id = "structfaiss_1_1Index_html_a040c6aed1f224f3ea7bf58eebc0c31a4" > < div class = "ttname" > < a href = "structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4" > faiss::Index::idx_t< / a > < / div > < div class = "ttdeci" > long idx_t< / div > < div class = "ttdoc" > all indices are this type < / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "Index_8h_source.html#l00062" > Index.h:62< / a > < / div > < / div >
2017-04-06 19:33:41 +08:00
< div class = "ttc" id = "classfaiss_1_1gpu_1_1GpuIndex_html_a345819c6214c2a6eb7874dde1145036f" > < div class = "ttname" > < a href = "classfaiss_1_1gpu_1_1GpuIndex.html#a345819c6214c2a6eb7874dde1145036f" > faiss::gpu::GpuIndex::addImpl_< / a > < / div > < div class = "ttdeci" > virtual void addImpl_(Index::idx_t n, const float *x, const Index::idx_t *ids)=0< / div > < div class = "ttdoc" > Overridden to actually perform the add. < / div > < / div >
2017-06-21 21:54:28 +08:00
< div class = "ttc" id = "classfaiss_1_1gpu_1_1GpuIndex_html_af576341f6996b0e80e26b9748db51eb7" > < div class = "ttname" > < a href = "classfaiss_1_1gpu_1_1GpuIndex.html#af576341f6996b0e80e26b9748db51eb7" > faiss::gpu::GpuIndex::add< / a > < / div > < div class = "ttdeci" > void add(faiss::Index::idx_t, const float *x) override< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "GpuIndex_8cu_source.html#l00061" > GpuIndex.cu:61< / a > < / div > < / div >
< div class = "ttc" id = "classfaiss_1_1gpu_1_1DeviceScope_html" > < div class = "ttname" > < a href = "classfaiss_1_1gpu_1_1DeviceScope.html" > faiss::gpu::DeviceScope< / a > < / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "DeviceUtils_8h_source.html#l00062" > DeviceUtils.h:62< / a > < / div > < / div >
< div class = "ttc" id = "structfaiss_1_1Index_html_a6e92732617c4dbe364e7678dd8773a7f" > < div class = "ttname" > < a href = "structfaiss_1_1Index.html#a6e92732617c4dbe364e7678dd8773a7f" > faiss::Index::is_trained< / a > < / div > < div class = "ttdeci" > bool is_trained< / div > < div class = "ttdoc" > set if the Index does not require training, or if training is done already < / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "Index_8h_source.html#l00069" > Index.h:69< / a > < / div > < / div >
< div class = "ttc" id = "namespacefaiss_html_afd12191c638da74760ff397cf319752c" > < div class = "ttname" > < a href = "namespacefaiss.html#afd12191c638da74760ff397cf319752c" > faiss::MetricType< / a > < / div > < div class = "ttdeci" > MetricType< / div > < div class = "ttdoc" > Some algorithms support both an inner product vetsion and a L2 search version. < / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "Index_8h_source.html#l00043" > Index.h:43< / a > < / div > < / div >
2017-02-23 06:26:44 +08:00
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