{"id":943,"date":"2026-07-24T15:44:51","date_gmt":"2026-07-24T15:44:51","guid":{"rendered":"https:\/\/boochlin.com\/?p=943"},"modified":"2026-09-19T19:20:57","modified_gmt":"2026-09-19T19:20:57","slug":"android-%e7%88%9b%e8%a3%9d%e7%bd%ae%e6%83%b3%e8%b7%91%e4%ba%ba%e8%87%89%e8%be%a8%e8%ad%988-%e5%85%84%e5%bc%9f%e9%bd%8a%e5%bf%83%ef%bc%8c%e8%bb%9f%e7%a1%ac%e5%85%bc%e6%96%bd-arm-compute-lib","status":"publish","type":"post","link":"https:\/\/boochlin.com\/?p=943","title":{"rendered":"Android \u721b\u88dd\u7f6e\u60f3\u8dd1\u4eba\u81c9\u8fa8\u8b589 \u2013 \u5144\u5f1f\u9f4a\u5fc3\uff0c\u8edf\u786c\u517c\u65bd\uff1aARM Compute Library (ACL)"},"content":{"rendered":"<p>\u524d\u9762\u5e7e\u7bc7\u90fd\u5728\u8ddf\u8a18\u61b6\u9ad4\u640f\u9b25\u3001\u8ddf GC \u7b97\u5e33\uff0c\u4eca\u5929\u4f86\u8ac7\u7d14\u7cb9\u7684\u300c\u786c\u9ad4\u7b97\u529b\u300d\u3002<\/p>\n<p>\u5728 1.3GHz \u5f31\u96de CPU \u7684\u7834\u677f\u5b50\u4e0a\u8dd1\u5373\u6642\u4eba\u81c9\u8fa8\u8b58\uff1a\u76f8\u6a5f\u6293\u5230\u4eba\u81c9\u3001\u62bd\u51fa\u4e86\u4e00\u4e32 512 \u7dad\u7684\u6d6e\u9ede\u6578\u7279\u5fb5\u5411\u91cf\uff0c\u63a5\u4e0b\u4f86\u8981\u5728\u672c\u5730\u8cc7\u6599\u5eab\u88e1\u7684 5,000 \u540d\u54e1\u5de5\u7279\u5fb5\u5eab\u4e2d\u5927\u6d77\u6488\u91dd\uff0c\u627e\u51fa\u9019\u500b\u4eba\u662f\u8ab0\u3002<\/p>\n<p>\u5728\u8001\u95c6\u6700\u521d\u63d0\u51fa\u300c\u8fa8\u8b58\u81f3\u5c11\u8981 10 FPS\u300d\u7684\u7121\u7406\u8981\u6c42\u4e0b\uff0c\u7b97\u76e4\u4e00\u6572\uff0c\u5c0f\u5b78\u7b97\u8853\u76f4\u63a5\u628a\u6240\u6709\u4eba\u5687\u50bb\uff1a<\/p>\n<blockquote>\n<p>512 (\u7dad\u5ea6) x 5000 (\u54e1\u5de5) x 10 (FPS) = 25,600,000 \u6b21 \/ \u79d2<\/p>\n<\/blockquote>\n<p>\u6bcf\u79d2\u9418\u5fc5\u9808\u541e\u4e0b <strong>2,560 \u842c\u6b21<\/strong> \u6d6e\u9ede\u6578\u4e58\u52a0\u904b\u7b97\uff01<\/p>\n<p>\u70ba\u4e86\u6d3b\u4e0b\u4f86\uff0c\u6211\u7b2c\u4e00\u6642\u9593\u5148\u8aaa\u670d\u8001\u95c6\u628a\u76ee\u6a19\u780d\u5230 3 FPS\u2014\u2014\u7562\u7adf\u6211\u5011\u8981\u7684\u662f\u4eba\u81c9\u8fa8\u8b58\u6210\u529f\u958b\u9580\uff0c\u4e0d\u662f\u5728\u9580\u7981\u6a5f\u4e0a\u770b 60fps \u7d72\u6ed1\u52d5\u756b\u3002<\/p>\n<p>\u4f46\u5c31\u7b97\u628a\u5e40\u7387\u780d\u5230 3 FPS\uff0c\u55ae\u6b21\u6bd4\u5c0d 5,000 \u4eba\u4f9d\u7136\u8981\u7b97\uff1a<\/p>\n<blockquote>\n<p>512 x 5000 = 2,560,000 \u6b21\u6d6e\u9ede\u6578\u904b\u7b97\uff08256 \u842c\u6b21\uff09<\/p>\n<\/blockquote>\n<p>\u5728\u6211\u5011\u9019\u53f0\u53ea\u6709 4 \u6838\u5fc3 Cortex-A53 \u5f31 CPU\u3001\u6c92\u6709 NPU \u7684\u7834\u677f\u5b50\u4e0a\uff0c\u7279\u5fb5\u6bd4\u5c0d\u6a21\u7d44\u6b77\u7d93\u4e86\u4e09\u6b21\u6975\u5176\u6158\u70c8\u7684\u6f14\u5316\u3002<\/p>\n<hr>\n<h2>\u7b2c\u4e00\u6b21\u6f14\u5316\uff1a\u5929\u771f\u7684 Java \u82e6\u5de5\uff08150ms\uff09<\/h2>\n<p>\u6700\u76f4\u89ba\u7684\u505a\u6cd5\uff0c\u5c31\u662f\u5728 Java \u88e1\u5beb\u500b\u96d9\u91cd\u8ff4\u5708\u7b97\u5167\u7a4d\uff08\u9918\u5f26\u76f8\u4f3c\u5ea6\uff09\uff1a<\/p>\n<pre><code class=\"hljs language-java\"><span class=\"hljs-type\">float<\/span> <span class=\"hljs-variable\">bestScore<\/span> <span class=\"hljs-operator\">=<\/span> -<span class=\"hljs-number\">1.0f<\/span>;\n<span class=\"hljs-type\">int<\/span> <span class=\"hljs-variable\">bestIndex<\/span> <span class=\"hljs-operator\">=<\/span> -<span class=\"hljs-number\">1<\/span>;\n\n<span class=\"hljs-keyword\">for<\/span> (<span class=\"hljs-type\">int<\/span> <span class=\"hljs-variable\">i<\/span> <span class=\"hljs-operator\">=<\/span> <span class=\"hljs-number\">0<\/span>; i &lt; <span class=\"hljs-number\">5000<\/span>; i++) {\n    <span class=\"hljs-type\">float<\/span>[] <span class=\"hljs-variable\">dbFeature<\/span> <span class=\"hljs-operator\">=<\/span> database.get(i);\n    <span class=\"hljs-type\">float<\/span> <span class=\"hljs-variable\">score<\/span> <span class=\"hljs-operator\">=<\/span> <span class=\"hljs-number\">0<\/span>;\n    <span class=\"hljs-keyword\">for<\/span> (<span class=\"hljs-type\">int<\/span> <span class=\"hljs-variable\">j<\/span> <span class=\"hljs-operator\">=<\/span> <span class=\"hljs-number\">0<\/span>; j &lt; <span class=\"hljs-number\">512<\/span>; j++) {\n        score += inputFeature[j] * dbFeature[j];\n    }\n    <span class=\"hljs-keyword\">if<\/span> (score &gt; bestScore) {\n        bestScore = score;\n        bestIndex = i;\n    }\n}<\/code><\/pre>\n<ul>\n<li><strong>\u5be6\u6e2c\u8017\u6642<\/strong>\uff1a<strong>\u7d04 150 \u6beb\u79d2<\/strong>\u3002<\/li>\n<li><strong>\u6158\u6cc1\u5206\u6790<\/strong>\uff1a\u4f4e\u968e ARM \u6676\u7247\u4e0a\u7684 Android JVM \u6839\u672c\u6c92\u6709\u5f37\u5927\u7684\u81ea\u52d5\u5411\u91cf\u5316\u8abf\u6821\u80fd\u529b\u3002CPU \u53ea\u80fd\u50cf\u500b\u8001\u5be6\u5df4\u4ea4\u7684\u82e6\u529b\uff0c\u8001\u8001\u5be6\u5be6\u8dd1\u5b8c\u9019 256 \u842c\u6b21\u4e58\u6cd5\u3002\u55ae\u6b21\u6bd4\u5c0d\u5403\u6389 150ms\uff0c\u807d\u8d77\u4f86\u597d\u50cf\u9084\u80fd\u64e0\u51fa 6 FPS\uff1f\u5225\u5929\u771f\u4e86\uff0c\u9019\u53ea\u662f\u6574\u500b Pipeline \u7684\u6700\u5f8c\u4e00\u6b65\uff0c\u524d\u9762\u7684\u4eba\u81c9\u5075\u6e2c\u3001\u54c1\u8cea\u904e\u6ffe\u30013D \u6d3b\u9ad4\u9632\u507d\u5168\u90fd\u8981\u5403\u6642\u9593\u554a\uff01<\/li>\n<\/ul>\n<hr>\n<h2>\u7b2c\u4e8c\u6b21\u6f14\u5316\uff1a\u628a 1:1 \u908f\u8f2f\u5957\u9032 1:N \u8ff4\u5708\u7684 JNI \u707d\u96e3\uff08320ms\uff09<\/h2>\n<p>\u5f88\u591a\u5de5\u7a0b\u5e2b\u76f4\u89ba\u8a8d\u70ba\uff1a\u300cJava \u6162\uff1f\u90a3\u5c31\u4ea4\u7d66\u5f71\u50cf\u795e\u5668 OpenCV \u7684 C++ \u5e95\u5c64\u4f86\u7b97\uff01\u300d<\/p>\n<p>\u5728\u6211\u5011\u7684\u5c08\u6848\u88e1\uff0c\u672c\u4f86\u5c31\u6709\u4e00\u500b\u5c08\u9580\u7d66\u300c1:1 \u5237\u5361\u8a8d\u8b49\u300d\u4f7f\u7528\u7684 <code>AuthFeatureMatcher.java<\/code>\u3002\u7576\u54e1\u5de5\u5148\u5237\u5de5\u865f\u5361\u3001\u5e36\u5165\u8eab\u5206\u5f8c\uff0c\u547c\u53eb OpenCV \u7684 <code>Core.gemm<\/code> \u6bd4\u5c0d\u55ae\u4e00\u76ee\u6a19\uff1a<\/p>\n<pre><code class=\"hljs language-java\"><span class=\"hljs-comment\">\/\/ AuthFeatureMatcher.java\uff08\u539f\u672c\u5c08\u70ba 1:1 \u5237\u5361\u6bd4\u5c0d\u8a2d\u8a08\uff09<\/span>\nfeatureDet.put(<span class=\"hljs-number\">0<\/span>, <span class=\"hljs-number\">0<\/span>, inputFeature);\nfeatureCmp.put(<span class=\"hljs-number\">0<\/span>, <span class=\"hljs-number\">0<\/span>, authFace.getRgbFeature());\n\n<span class=\"hljs-comment\">\/\/ \u547c\u53eb OpenCV \u5e95\u5c64\u7b97\u55ae\u6b21\u5167\u7a4d\u5206\u6578<\/span>\n<span class=\"hljs-comment\">\/\/ \u7b2c\u4e8c\u77e9\u9663\u9700\u8f49\u7f6e\u70ba 512x1 \u624d\u80fd\u8207 1x512 \u76f8\u4e58\uff0c\u7d50\u679c\u70ba 1x1 \u9918\u5f26\u76f8\u4f3c\u5ea6\u7d14\u91cf<\/span>\nCore.gemm(featureDet, featureCmp, <span class=\"hljs-number\">1.0<\/span>, <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">Mat<\/span>(), <span class=\"hljs-number\">0.0<\/span>, cvResult, Core.GEMM_2_T);<\/code><\/pre>\n<p>\u5728 1:1 \u6a21\u5f0f\u4e0b\uff0c\u9019\u6bb5\u7a0b\u5f0f\u78bc\u53ea\u57f7\u884c\u4e00\u6b21\uff0c\u8017\u6642\u4e0d\u5230 0.5ms\uff0c\u723d\u5feb\u5f97\u5f88\u3002<\/p>\n<p>\u4f46\u5982\u679c\u628a\u5b83\u62ff\u4f86\u505a 1:N \u7121\u611f\u5237\u81c9\uff08\u4e0d\u5237\u5361\u3001\u5f9e 5,000 \u4eba\u5927\u6d77\u6488\u91dd\uff09\uff0c\u5728 Java \u5916\u5c64\u5957\u4e0a <code>for (int i = 0; i &lt; 5000; i++)<\/code> \u8ff4\u5708\u2014\u2014<strong>\u4e0b\u5834\u5c31\u662f\u4e00\u5834\u707d\u96e3<\/strong>\u3002<\/p>\n<ul>\n<li><strong>\u5be6\u6e2c\u8017\u6642<\/strong>\uff1a<strong>\u7d04 320 \u6beb\u79d2\uff08\u5c45\u7136\u6bd4\u7d14 Java \u6162\u4e86\u5169\u500d\u4ee5\u4e0a\uff01\uff09<\/strong>\u3002<\/li>\n<li><strong>\u81f4\u547d\u7684 JNI \u904e\u8def\u8cbb<\/strong>\uff1a<br \/>\n\u9019\u72af\u4e86\u8de8\u8a9e\u8a00\u547c\u53eb\u7684\u5927\u5fcc\uff1a\u5728 Java \u8ff4\u5708\u88e1\u983b\u7e41\u547c\u53eb JNI\u3002<br \/>\n\u70ba\u4e86\u7b97\u4e00\u7b46\u5c0f\u5c0f\u7684\u4e58\u6cd5\uff0c\u7a0b\u5f0f\u904e\u6d77\u95dc\uff08JNI Context Switch\uff09\u4f86\u56de\u8dd1\u4e86 5,000 \u8d9f\uff01<br \/>\n\u9019\u5c31\u50cf\u70ba\u4e86\u69a8 5,000 \u676f\u679c\u6c41\uff0c\u958b\u5361\u8eca\u4e00\u6b21\u53ea\u8f09\u300c\u4e00\u9846\u860b\u679c\u300d\u8dd1 5,000 \u8d9f\u53bb\u5de5\u5ee0\uff0c\u8def\u4e0a\u7684\u904e\u8def\u8cbb\u8207\u63db\u5411\u958b\u92b7\u65e9\u5c31\u9060\u9060\u8d85\u904e\u69a8\u679c\u6c41\u7684\u6642\u9593\u4e86\u3002<\/li>\n<\/ul>\n<hr>\n<h2>\u6700\u7d42\u9032\u5316\uff1a\u964d\u7dad\u6253\u64ca\uff08ACL SDK + ARM NEON\uff0c3ms\uff09<\/h2>\n<p>\u88ab JNI \u75db\u64ca\u4e4b\u5f8c\uff0c\u6211\u5011\u5fb9\u5e95\u63a8\u7ffb\u67b6\u69cb\uff0c\u70ba 1:N \u6253\u9020\u4e86\u5c08\u5c6c\u7684 <strong><code>NesFeatureMatcher.java<\/code><\/strong>\uff1a<\/p>\n<ol>\n<li><strong>\u4e0d\u80fd\u904e\u6d77\u95dc 5,000 \u6b21<\/strong>\uff1a\u6574\u500b 1:N \u6bd4\u5c0d\u8ff4\u5708\u5fc5\u9808\u6574\u5305\u642c\u5230 C++ \u5e95\u5c64\u3002<\/li>\n<li><strong>OpenCV \u592a\u901a\u7528<\/strong>\uff1a\u6211\u5011\u9700\u8981\u91dd\u5c0d\u9019\u9846 ARM Cortex-A53 \u91cf\u8eab\u6253\u9020\u7684\u5c08\u5c6c\u6b66\u5668\u3002<\/li>\n<li><strong>\u5f9e\u300c\u55ae\u6311\u300d\u5347\u7d1a\u70ba\u300c\u6253\u7fa4\u67b6\u300d<\/strong>\uff1a<br \/>\n\u6211\u5011\u4e0d\u518d\u4e00\u5c0d\u4e00\u55ae\u6311\u4e86\u3002\u7a0b\u5f0f\u555f\u52d5\u6642\uff0c\u76f4\u63a5\u5c07 5,000 \u540d\u54e1\u5de5\u7684\u7279\u5fb5\u5728 C++ \u8a18\u61b6\u9ad4\u4e2d\u62fc\u63a5\u6210\u4e00\u500b <strong>5000 x 512 \u7684\u4e8c\u7dad\u8d85\u7d1a\u77e9\u9663\uff08Tensor\uff09<\/strong>\u3002<\/li>\n<\/ol>\n<p>\u65b0\u756b\u9762\u9032\u4f86\u6642\uff0c<strong>\u5168\u6d41\u7a0b\u53ea\u904e\u300c\u4e00\u6b21\u300d\u6d77\u95dc<\/strong>\uff1a<\/p>\n<pre><code class=\"hljs language-java\"><span class=\"hljs-comment\">\/\/ NesFeatureMatcher.java<\/span>\n<span class=\"hljs-comment\">\/\/ \u8de8\u4e00\u6b21 JNI\uff0c\u5e95\u5c64\u76f4\u63a5\u767c\u52d5 1 x 5000 \u5927\u77e9\u9663\u4e58\u6cd5<\/span>\n<span class=\"hljs-type\">int<\/span> <span class=\"hljs-variable\">faceIndex<\/span> <span class=\"hljs-operator\">=<\/span> aclLib.cachedNesMatch(inputFeatures, threshold);<\/code><\/pre>\n<p>\u5728 C++ \u5e95\u5c64\uff0c\u6539\u7528 ARM \u539f\u5ee0\u7684 <strong>Compute Library (ACL)<\/strong> \u767c\u52d5 <code>NESGEMM<\/code>\uff1a<\/p>\n<pre><code class=\"hljs language-cpp\"><span class=\"hljs-comment\">\/\/ C++ \u5e95\u5c64\uff1aACL SGEMM \u904b\u7b97<\/span>\nNESFeatureMatcher::<span class=\"hljs-built_in\">copy_to_tensor<\/span>(*_tensor_a, inputFeature);\n\n<span class=\"hljs-comment\">\/\/ \u547c\u53eb ARM \u5e95\u5c64\u786c\u9ad4\u52a0\u901f (NEON SIMD) \u4e00\u64ca\u5fc5\u6bba<\/span>\nsgemm.<span class=\"hljs-built_in\">run<\/span>();\n\nNESFeatureMatcher::<span class=\"hljs-built_in\">copy_from_tensor<\/span>(*_tensor_o, results.<span class=\"hljs-built_in\">get<\/span>());<\/code><\/pre>\n<ul>\n<li><strong>\u5be6\u6e2c\u8017\u6642<\/strong>\uff1a<strong>\u7d04 3 \u6beb\u79d2\uff08\u6574\u6574\u767e\u500d\u79d2\u6bba\uff01\uff09<\/strong>\u3002<\/li>\n<\/ul>\n<hr>\n<h2>\u70ba\u4f55\u5982\u6b64\u72c2\u66b4\uff1f\uff08\u84cb\u4e00\u842c\u4efd\u516c\u6587\u7684\u9802\u7d1a\u8fa6\u516c\u5ba4 SOP\uff09<\/h2>\n<p>\u5982\u679c\u8981\u7528\u6700\u76f4\u767d\u7684\u65b9\u5f0f\u7e3d\u7d50 SGEMM \u8207\u786c\u9ad4\u52a0\u901f\uff0c\u6211\u5011\u53ef\u4ee5\u60f3\u50cf <strong>\u300c\u4e00\u500b\u8fa6\u516c\u5ba4\u54e1\u5de5\uff08CPU\uff09\u8981\u84cb 1 \u842c\u4efd\u516c\u6587\uff08\u8cc7\u6599\uff09\u300d<\/strong> \u7684\u73fe\u5834\uff1a<\/p>\n<h3>1. \u50b3\u7d71\u5beb\u6cd5\uff08\u4e00\u822c\u8ff4\u5708\uff09<\/h3>\n<p>\u54e1\u5de5\u8d70\u5230\u9059\u9060\u7684\u6a94\u6848\u5ba4\uff08\u4e3b\u8a18\u61b6\u9ad4 RAM\uff09\uff0c\u627e\u51fa\u4e00\u4efd\u516c\u6587\uff0c\u8d70\u56de\u4f4d\u5b50\uff0c\u62ff\u8d77\u5370\u7ae0\u84cb\u4e0b\u53bb\u3002\u7136\u5f8c\u518d\u8d70\u53bb\u6a94\u6848\u5ba4\u62ff\u4e0b\u4e00\u4efd\u2026\u2026<br \/>\n<strong>\u7d50\u679c<\/strong>\uff1a\u4f86\u56de\u8dd1\u6b7b\uff0c\u4e00\u5929\u53ea\u80fd\u84cb 100 \u4efd\uff0c\u5927\u90e8\u5206\u6642\u9593\u90fd\u5728\u8d70\u8def\u4e0a\u6d6a\u8cbb\u6389\u4e86\u3002<\/p>\n<h3>2. \u5feb\u53d6\u9810\u8b80\uff08Prefetch\uff09\u2014\u2014 \u8acb\u500b\u5c0f\u52a9\u624b<\/h3>\n<p>\u70ba\u4e86\u89e3\u6c7a\u8d70\u8def\u7684\u6642\u9593\uff0c\u54e1\u5de5\u8acb\u4e86\u4e00\u500b\u5c0f\u52a9\u624b\u3002\u7576\u54e1\u5de5\u5728\u4f4d\u5b50\u4e0a\u84cb\u7ae0\u6642\uff0c\u5c0f\u52a9\u624b\u62fc\u547d\u53bb\u6a94\u6848\u5ba4\u628a\u63a5\u4e0b\u4f86\u8981\u84cb\u7684\u516c\u6587\u4e00\u758a\u4e00\u758a\u642c\u5230\u54e1\u5de5\u684c\u4e0a\uff08L1 \u5feb\u53d6\uff09\u3002<br \/>\n<strong>\u7d50\u679c<\/strong>\uff1a\u54e1\u5de5\u518d\u4e5f\u4e0d\u7528\u8d77\u8eab\uff0c\u4f38\u624b\u5c31\u80fd\u62ff\u5230\u4e0b\u4e00\u4efd\u516c\u6587\u3002<\/p>\n<h3>3. 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