{"id":3366,"date":"2025-11-25T13:14:57","date_gmt":"2025-11-25T05:14:57","guid":{"rendered":"http:\/\/www.xzclass.com\/?p=3366"},"modified":"2026-03-26T16:29:35","modified_gmt":"2026-03-26T08:29:35","slug":"%e5%88%b0%e5%ba%95%e4%bb%80%e4%b9%88%e6%98%afall-reduce%e3%80%81all-to-all%ef%bc%9f","status":"publish","type":"post","link":"http:\/\/www.xzclass.com\/?p=3366","title":{"rendered":"\u5230\u5e95\u4ec0\u4e48\u662fAll-Reduce\u3001All-to-All\uff1f"},"content":{"rendered":"
\u6211\u4eec\u5728\u770bAIGC\u5927\u6a21\u578b\u3001\u7b97\u529b\u96c6\u7fa4\u76f8\u5173\u6587\u732e\u7684\u65f6\u5019\uff0c\u7ecf\u5e38\u4f1a\u770b\u5230\u201c<\/span><\/span>All-Reduce<\/span><\/span>\u201d\u3001\u201c<\/span><\/span>All-to-All<\/span><\/span>\u201d\u8fd9\u6837\u7684\u8bcd\u7ec4\u3002<\/span><\/span><\/section>\n

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\u5927\u5bb6\u77e5\u9053\u5b83\u4eec\u662f\u4ec0\u4e48\u610f\u601d\u5417\uff1f<\/span><\/span><\/section>\n

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\u6545\u4e8b\u8fd8\u662f\u8981\u4ece\u82f1\u4f1f\u8fbe\u8bf4\u8d77\u3002<\/span><\/span><\/section>\n

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2014\u5e74\uff0c\u4e3a\u4e86\u53d6\u4ee3\u4f20\u7edf\u7684PCIe\u534f\u8bae\uff0c\u82f1\u4f1f\u8fbe\u63a8\u51fa\u4e86\u5168\u65b0\u7684NVLINK\u6280\u672f\uff0c\u7528\u4e8eGPU\u548cGPU\u4e4b\u95f4\u7684\u70b9\u5bf9\u70b9\u9ad8\u901f\u4e92\u8054\u3002<\/span><\/span><\/section>\n

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\u540e\u6765\uff0cNVLINK\u6280\u672f\u4e0d\u65ad\u8fed\u4ee3\u3002<\/span><\/span>2018\u5e74\uff0c\u4e3a\u4e86\u5b9e\u73b08\u9897GPU\u4e4b\u95f4\u7684\u4e92\u8fde\uff0c\u82f1\u4f1f\u8fbe\u53c8\u53d1\u5e03\u4e86NVSwitch 1.0\u3002<\/span><\/span>
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\u5728\u6363\u9f13GPU\u4e92\u8fde\u6280\u672f\u7684\u8fc7\u7a0b\u4e2d\uff0c\u82f1\u4f1f\u8fbe\u8fd8\u53d1\u660e\u4e86\u4e00\u4e2a\u540d\u53eb<\/span><\/span>NCCL\uff08NVIDIA Collective Communications Library\uff09\u7684\u96c6\u5408\u901a\u4fe1\u5e93\u3002<\/span><\/span><\/section>\n

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NCCL\u652f\u6301\u591a\u79cd\u7f16\u7a0b\u8bed\u8a00\u548c\u7f51\u7edc\uff0c<\/span><\/span>\u5728\u7b97\u6cd5\u5c42\u9762\u63d0\u4f9b\u4e86\u4e30\u5bcc\u7684\u5916\u90e8API\uff0c<\/span><\/span>\u53ef\u4ee5\u5927\u5e45\u63d0\u5347\u901a\u4fe1\u7f51\u7edc\u6027\u80fd\uff0c\u4e5f\u53ef\u4ee5\u8ba9GPU\u4e4b\u95f4\u7684\u901a\u4fe1\u8bbe\u8ba1\u53d8\u5f97\u66f4\u7b80\u5355\u3002<\/span><\/span><\/p>\n


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\u5728NCCL\u4e2d\uff0c\u5b9a\u4e49\u4e86\u4e24\u79cd\u901a\u4fe1\u6a21\u5f0f\uff1a<\/span><\/span><\/p>\n


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1\u3001\u70b9\u5bf9\u70b9\u901a\u4fe1\uff08Point to point communication\uff0cP2P\uff09<\/span><\/span>
<\/span><\/p>\n

2\u3001\u96c6\u5408\u901a\u4fe1\uff08Collective communication\uff0cCC\uff09<\/span><\/span><\/p>\n


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\u70b9\u5bf9\u70b9\u5927\u5bb6\u4e00\u770b\u5c31\u61c2\uff0c\u5c31\u662f\u4e24\u4e2a\u70b9\u4e4b\u95f4\u8fdb\u884c\u901a\u4fe1\u3002\u4e00\u4e2a\u662fSender\uff0c\u4e00\u4e2a\u662fReceiver<\/span><\/span>\u3002<\/span><\/span><\/p>\n


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\u4ec0\u4e48\u662f\u96c6\u5408\u901a\u4fe1\u5462\uff1f\u662f\u6307\u4e00\u7ec4\uff08\u591a\u4e2a\uff09\u8282\u70b9\u5185\u8fdb\u884c\u901a\u4fe1\u3002\u5728\u6211\u4eec\u4f20\u7edf\u901a\u4fe1\u91cc\uff0c\u5c31\u662f\u70b9\u5230\u591a\u70b9\uff0c\u591a\u70b9\u5230\u591a\u70b9\uff0c\u6d89\u53ca\u5230\u7ec4\u7f51\uff08\u7f51\u72b6\u3001\u661f\u72b6\u3001\u73af\u72b6\u3001mesh\u7b49\uff09\u90a3\u79cd\u3002<\/span><\/span><\/p>\n


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NCCL\u8fd8\u5b9a\u4e49\u4e86\u4e00\u4e9b\u8ba1\u7b97\u8282\u70b9\u4e4b\u95f4\u6570\u636e\u4ea4\u6362\u7684\u57fa\u672c\u64cd\u4f5c\u6a21\u5f0f\uff0c\u5e76\u5c06\u5176\u547d\u540d\u4e3a\u2014\u2014<\/span>\u201c\u901a\u4fe1\u539f\u8bed\uff08\u4e5f\u6709\u5199\u4f5c<\/span><\/span>\u201c<\/span><\/span>\u901a\u4fe1\u5143\u8bed<\/span><\/span>\u201d<\/span><\/span>\uff09<\/span>\u3002<\/span><\/span><\/p>\n


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\u8fd9\u4e9b\u901a\u4fe1\u539f\u8bed\u5305\u62ec\uff1a<\/span><\/span>Broadcast\u3001<\/span><\/span>Scatter\u3001<\/span><\/span>Gather\u3001All-Gather\u3001Reduce\u3001All-Reduce\u3001Reduce-Scatter\u3001All-to-All\u7b49\u3002<\/span><\/span><\/p>\n


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\u6ca1\u9519\uff0c<\/span><\/span>All-Reduce\u548c<\/span><\/span>All-to-All\uff0c\u5c31\u662f\u5176\u4e2d\u4e4b\u4e8c\u3002<\/span><\/span><\/p>\n


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\u8fd9\u4e9b\u901a\u4fe1\u539f\u8bed\u662f<\/span><\/span>\u6784\u5efa\u590d\u6742\u901a\u4fe1\u884c\u4e3a\u7684\u201c\u539f\u5b50\u64cd\u4f5c\u201d\u3002\u73b0\u5728\u6240\u6709\u590d\u6742\u7684AI\u7b97\u529b\u96c6\u7fa4\uff0c\u5185\u90e8\u901a\u4fe1\u90fd\u662f\u57fa\u4e8e\u8fd9\u4e9b\u901a\u4fe1\u539f\u8bed\u3002\u5b83\u4eec\u6781\u5927\u5730<\/span><\/span>\u63d0\u5347\u4e86\u5e76\u884c\u8ba1\u7b97\u7684\u6548\u7387\u548c\u4fbf\u5229\u6027\u3002<\/span><\/span><\/p>\n


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\u63a5\u4e0b\u6765\uff0c\u6211\u4eec\u5c31\u9010\u4e2a\u89e3\u91ca\u4e00\u4e0b\uff0c\u8fd9\u4e9b\u901a\u4fe1\u539f\u8bed\u7684\u610f\u601d\u3002<\/span><\/span><\/p>\n


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\u2589 <\/span><\/span><\/span>Broadcast\uff08<\/span><\/span>1\u5bf9\u591a\u7684\u5e7f\u64ad<\/span><\/span>\uff09<\/span><\/span><\/p>\n


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\u8fd9\u4e2a\u6700\u7b80\u5355\u3002<\/span><\/span>\u5f53\u4e3b\u8282\u70b9\u6267\u884cBroadcast\u64cd\u4f5c\u65f6\uff0c\u6570\u636e\u4f1a\u4ece\u4e3b\u8282\u70b9\u53d1\u9001\u81f3\u5176\u4ed6\u6240\u6709\u8282\u70b9\u3002<\/span><\/span><\/p>\n


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Broadcast\u662f\u4e00\u4e2a\u5178\u578b\u7684\u5206\u53d1\u3001\u6563\u64ad\u884c\u4e3a\u3002<\/span><\/span>\u5728\u5206\u5e03\u5f0f\u673a\u5668\u5b66\u4e60\u4e2d\uff0cBroadcast\u5e38\u7528\u4e8e\u7f51\u7edc\u53c2\u6570\u7684\u521d\u59cb\u5316\u3002<\/span><\/span><\/p>\n


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\u2589 <\/span><\/span><\/span>Scatter\uff081\u5bf9\u591a\u7684\u53d1\u6563\uff09<\/span><\/span><\/p>\n


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Scatter\u4e5f\u662f\u4e00\u79cd\u5206\u53d1\u3001\u6563\u64ad\u884c\u4e3a\u3002\u5b83\u4e5f\u662f<\/span><\/span>\u5c06\u4e3b\u8282\u70b9\u7684\u6570\u636e\u53d1\u9001\u81f3\u5176\u4ed6\u6240\u6709\u8282\u70b9\u3002\u53ea\u4e0d\u8fc7\uff0c<\/span><\/span>Broadcast\u53d1\u9001\u7684\u662f\u5b8c\u6574\u6570\u636e\uff0c\u800c<\/span><\/span>Scatter\u662f\u5c06\u6570\u636e\u8fdb\u884c\u5207\u5272\u540e\uff0c\u518d\u5206\u53d1\uff0c\u5c31\u50cf\u5206\u751f\u65e5\u86cb\u7cd5\u3002<\/span><\/span><\/section>\n

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\u2589 <\/span><\/span><\/span>Gather\uff08\u591a\u5bf91\u7684\u6536\u96c6\uff09<\/span><\/span><\/p>\n<\/section>\n


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Gather\uff0c\u662f\u5c06\u591a\u4e2asender\uff08\u53d1\u9001\u8282\u70b9\uff09\u4e0a\u7684\u6570\u636e\u6536\u96c6\u5230\u5355\u4e2a\u8282\u70b9\u4e0a\uff0c\u53ef\u4ee5\u7406\u89e3\u4e3a\u53cd\u5411\u7684Scatter\u3002<\/span><\/span><\/section>\n

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\u2589 <\/span><\/span><\/span>All-Gather\uff08\u591a\u5bf9\u591a\u7684\u6536\u96c6\uff09<\/span><\/span><\/p>\n


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Gather\u662f\u591a\u4e2a\u5230\u4e00\u4e2a\uff0c<\/span><\/span>All-Gather\u662f\u591a\u4e2a\u5230\u591a\u4e2a\u3002<\/span><\/span>
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All-Gather<\/span><\/span>\u662f\u5c06\u591a\u4e2asender\uff08\u53d1\u9001\u8282\u70b9\uff09\u4e0a\u7684\u6570\u636e\u6536\u96c6\u5230\u591a\u4e2a\u8282\u70b9\u4e0a\u3002\u5b83<\/span><\/span>\u76f8\u5f53\u4e8e\u591a\u4e2aGather\u64cd\u4f5c\u3002\u6216\u8005\u8bf4\uff0c\u662f\u4e00\u4e2aGather\u64cd\u4f5c\u4e4b\u540e\uff0c\u8ddf\u7740\u4e00\u4e2aBroadcast\u64cd\u4f5c\u3002<\/span><\/span><\/p>\n


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\u2589 <\/span><\/span><\/span>Reduce\uff08\u591a\u5bf91\u7684\u89c4\u7ea6\uff09<\/span><\/span>
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Reduce\u7684\u82f1\u6587\u610f\u601d\u662f<\/span><\/span>\u201c<\/span><\/span>\u51cf\u5c11\u3001\u964d\u4f4e<\/span><\/span>\u201d<\/span><\/span>\u3002\u5728\u96c6\u5408\u901a\u4fe1\u91cc\uff0c\u5b83\u8868\u793a<\/span><\/span>\u201c<\/span><\/span>\u89c4\u7ea6<\/span><\/span>\u201d<\/span><\/span>\u8fd0\u7b97\uff0c\u662f\u4e00\u7cfb\u5217\u7b80\u5355\u8fd0\u7b97\u64cd\u4f5c\uff08<\/span><\/span>\u5305\u62ec\uff1aSUM\u3001MIN\u3001MAX\u3001PROD\u3001LOR\u7b49\uff09<\/span><\/span>\u7684\u7edf\u79f0\u3002<\/span><\/span><\/p>\n


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\u7ecf\u5e38\u7528Excel\u8868\u683c\u7684\u7ae5\u978b\uff0c\u5bf9\u8fd9\u4e9b\u7b80\u5355\u8fd0\u7b97\u5e94\u8be5\u4e0d\u964c\u751f\u3002\u4f8b\u5982SUM\uff0c\u5c31\u662f\u6c42\u548c\u3002MIN\uff0c\u5c31\u662f\u627e\u51fa\u6700\u5c0f\u503c\u3002<\/span><\/span><\/p>\n


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\u5176\u5b9e\u8bf4\u767d\u4e86\uff0c<\/span><\/span>Reduce\u5c31\u662f\uff1a\u8f93\u5165\u591a\u4e2a\u6570\uff0c\u6267\u884c\u64cd\u4f5c\u540e\uff0c\u5f97\u5230\u66f4\u5c11\u7684\u6570\uff08\u4f8b\u59821\u4e2a\u6570\uff09\u3002<\/span><\/span><\/p>\n


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\u4e0b\u9762\u8fd9\u4e2a\uff0c\u5c31\u662f\u4ee5ReduceSum\uff08\u6c42\u548c\u89c4\u7ea6\uff09\u4e3a\u4f8b\uff1a<\/span><\/span><\/p>\n


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\u2589 <\/span><\/span><\/span>All-Reduce\uff08\u591a\u5bf9\u591a\u7684\u89c4\u7ea6\uff09<\/span><\/span><\/p>\n


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All-Reduce\uff0c\u8fd9\u4e2a\u662f\u6211\u4eec\u5728\u6587\u7ae0\u5f00\u5934\u63d0\u5230\u7684\uff0cAI\u9886\u57df\u975e\u5e38\u5e38\u89c1\u7684\u4e00\u4e2a\u8bcd\u7ec4\u3002<\/span><\/span><\/p>\n


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\u5728\u5927\u6a21\u578b\u8bad\u7ec3\u4e2d\uff0c\u7ecf\u5e38\u4f1a\u7528\u5230\u6570\u636e\u5e76\u884c\uff08DP\uff09\u8fd9\u4e2a\u5e76\u884c\u65b9\u5f0f\u3002\u91cc\u9762\u5c31\u6709AIl Reduce\u8fd9\u4e2a\u5173\u952e\u64cd\u4f5c\u3002<\/span><\/span>
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\u6211\u4eec\u4ee5<\/span><\/span>All Reduce<\/span><\/span> Sum\uff08\u6c42\u548c\uff09\u4e3a\u4f8b\uff1a<\/span><\/span><\/p>\n


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\u9996\u5148\uff0c\u5bf9\u6240\u6709\u8282\u70b9\u8fdb\u884c\u6570\u636e\u6536\u96c6\u3002\u7136\u540e\uff0c\u5bf9\u6570\u636e\u8fdb\u884c\u6c42\u548c\u3002\u518d\u7136\u540e\uff0c\u628a\u7ed3\u679c\u91cd\u65b0\u53d1\u56de\u7ed9\u6240\u6709\u8282\u70b9\u3002<\/span><\/span>
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\u5728\u5927\u6a21\u578b\u8bad\u7ec3\u4e2d\uff0cServer GPU\u8282\u70b9\u6536\u96c6\u7684\u6570\u636e\uff0c\u5c31\u662f\u5404\u4e2aWorker GPU\u8282\u70b9\u8ba1\u7b97\u5f97\u51fa\u7684\u201c\u68af\u5ea6\u201d\u3002\u6c42\u548c\u4e4b\u540e\u518d\u53d1\u56de\u7684\u8fc7\u7a0b\uff0c\u662f\u201c\u66f4\u65b0\u68af\u5ea6\u201d\u3002\u770b\u4e0d\u61c2\u6ca1\u5173\u7cfb\uff0c\u4ee5\u540e\u5c0f\u67a3\u541b\u4f1a\u518d\u4ecb\u7ecd\u3002<\/span><\/span><\/p>\n


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\u2589 <\/span><\/span><\/span>Reduce-Scatter\uff08\u7ec4\u5408\u7684\u89c4\u7ea6\u4e0e\u53d1\u6563\uff09<\/span><\/span><\/p>\n


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Reduce-Scatter\u7a0d\u5fae\u6709\u70b9\u590d\u6742\u3001\u70e7\u8111\u3002<\/span><\/span><\/p>\n


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\u5b83\u662f\u5148<\/span><\/span>\u5f52\u7ea6\uff08Reduce\uff09\uff0c\u518d\u5206\u6563\uff08Scatter\uff09\u3002\u5177\u4f53\u6765\u8bf4\uff1a<\/span><\/span>
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\u9996\u5148\uff0c\u5728\u6240\u6709\u53c2\u4e0e\u8ba1\u7b97\u7684GPU\u8282\u70b9\u4e0a\uff0c\u5bf9\u4f4d\u4e8e\u76f8\u540c\u4f4d\u7f6e\u6216\u7d22\u5f15\u7684\u6570\u636e\u5757\u6267\u884c\u6307\u5b9a\u7684\u89c4\u7ea6\u8fd0\u7b97\uff08\u4f8b\u5982\u6c42\u548cSUM\uff09\u3002<\/span><\/span>
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\u63a5\u7740\uff0c\u5c06\u89c4\u7ea6\u540e\u7684\u5b8c\u6574\u7ed3\u679c\u6309\u7ef4\u5ea6\u5207\u5206\uff0c\u5e76\u5c06\u4e0d\u540c\u7684\u6570\u636e\u5757\u5206\u53d1\u7ed9\u5404\u4e2a\u8282\u70b9\u3002\u6700\u7ec8\uff0c\u6bcf\u4e2a\u8282\u70b9\u53ea\u5f97\u5230\u6574\u4e2a\u89c4\u7ea6\u7ed3\u679c\u7684\u4e00\u90e8\u5206\uff0c\u800c\u4e0d\u662f\u5168\u90e8\u3002<\/span><\/span><\/p>\n


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\u7b80\u5355\u6765\u8bf4\uff0c\u5b83\u5148\u5bf9\u6240\u6709\u6570\u636e\u8fdb\u884c\u201c\u6c47\u603b\u8ba1\u7b97\u201d\uff0c\u7136\u540e\u518d\u5c06\u8ba1\u7b97\u597d\u7684\u7ed3\u679c\u201c\u5206\u6563\u4e0b\u53d1\u201d\u3002<\/span><\/span><\/p>\n


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\u2589 <\/span><\/span><\/span>All-to-All\uff08\u591a\u5bf9\u591a\u7684\u5168\u4e92\u8fde\uff09<\/span><\/span><\/p>\n


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AIl-to-AII\u4e5f\u662fAI\u9886\u57df\u51fa\u73b0\u9891\u7387\u5f88\u9ad8\u7684\u4e00\u4e2a\u8bcd\u7ec4\u3002\u5b83\u662f\u5168\u4ea4\u6362\u64cd\u4f5c\uff0c\u53ef\u4ee5\u8ba9\u6bcf\u4e2a\u8282\u70b9\u90fd\u83b7\u53d6\u5176\u4ed6\u8282\u70b9\u7684\u503c\u3002<\/span><\/span><\/p>\n


<\/span><\/p>\n

\u5728\u4f7f\u7528All-to-All\u65f6\uff0c\u6bcf\u4e00\u4e2a\u8282\u70b9\u90fd\u4f1a\u5411\u4efb\u610f\u4e00\u4e2a\u8282\u70b9\u53d1\u9001\u6d88\u606f\uff0c\u6bcf\u4e00\u4e2a\u8282\u70b9\u4e5f\u90fd\u4f1a\u63a5\u6536\u5230\u4efb\u610f\u4e00\u4e2a\u8282\u70b9\u7684\u6d88\u606f\u3002\u6bcf\u4e2a\u8282\u70b9\u7684\u63a5\u6536\u7f13\u51b2\u533a\u548c\u53d1\u9001\u7f13\u51b2\u533a\u90fd\u662f\u4e00\u4e2a\u5206\u4e3a\u82e5\u5e72\u4e2a\u6570\u636e\u5757\u7684\u6570\u7ec4\u3002<\/span><\/span><\/section>\n

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All-to-All\u7684\u5177\u4f53\u64cd\u4f5c\u662f\uff1a\u5c06\u8282\u70b9i\u7684\u53d1\u9001\u7f13\u51b2\u533a\u4e2d\u7684\u7b2cj\u5757\u6570\u636e\u53d1\u9001\u7ed9\u8282\u70b9j\u3002\u8282\u70b9j\u5c06\u63a5\u6536\u5230\u7684\u6765\u81ea\u8282\u70b9i\u7684\u6570\u636e\u5757\uff0c\u653e\u5728\u81ea\u8eab\u63a5\u6536\u7f13\u51b2\u533a\u7684\u7b2ci\u5757\u4f4d\u7f6e\u3002<\/span><\/span><\/section>\n

<\/span><\/section>\n
All-to-All\u4e0eAll-Gather\u76f8\u6bd4\u8f83\uff0c\u533a\u522b\u5728\u4e8e\uff1aAll-Gather\u64cd\u4f5c\u4e2d\uff0c\u4e0d\u540c\u8282\u70b9\u5411\u67d0\u4e00\u8282\u70b9\u6536\u96c6\u5230\u7684\u6570\u636e\u662f\u5b8c\u5168\u76f8\u540c\u7684\u3002\u800c\u5728All-to-All\u4e2d\uff0c\u4e0d\u540c\u7684\u8282\u70b9\u5411\u67d0\u4e00\u8282\u70b9\u6536\u96c6\u5230\u7684\u6570\u636e\u662f\u4e0d\u540c\u7684\u3002\u5728\u6bcf\u4e2a\u8282\u70b9\u7684\u53d1\u9001\u7f13\u51b2\u533a\u4e2d\uff0c\u4e3a\u6bcf\u4e2a\u8282\u70b9\u90fd\u5355\u72ec\u51c6\u5907\u4e86\u4e00\u5757\u6570\u636e\u3002<\/span><\/span><\/section>\n

<\/span><\/section>\n
\u4e0a\u9762\u8fd9\u4e2a\u56fe\uff0c\u5927\u5bb6\u5982\u679c\u5b66\u8fc7\u5de5\u7a0b\u6570\u5b66\u7684\u8bdd\uff0c\u5c31\u4f1a\u53d1\u73b0\uff0c\u5b83\u5c31\u662f\u4e00\u4e2a\u77e9\u9635\u5012\u7f6e\u3002\u6216\u8005\u8bf4\uff0c\u662fExcel\u91cc\u7684\u884c\u5217\u5012\u8f6c\u3002<\/span><\/span><\/section>\n

<\/span><\/section>\n

All-to-All\u7684\u6838\u5fc3\u76ee\u6807\u662f\u91cd\u5206\u5e03\u3002\u5b83\u4e0d\u8fdb\u884c\u805a\u5408\u8fd0\u7b97\uff0c\u800c\u662f\u4e13\u6ce8\u4e8e\u5728\u4e0d\u540c\u8282\u70b9\u95f4\u91cd\u65b0\u5206\u5e03\u6570\u636e\u5757\u3002<\/span><\/span><\/p>\n


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\u4ee5\u540e\u5c0f\u67a3\u541b\u4f1a\u7ed9\u5927\u5bb6\u4ecb\u7ecd\uff0c<\/span><\/span>All-to-All<\/span><\/span>\u64cd\u4f5c\u5728\u5927\u6a21\u578b\u8bad\u7ec3\u4e2d\u7684\u6df7\u5408\u5e76\u884c\u7b56\u7565\u91cc\u81f3\u5173\u91cd\u8981\u3002\u4f8b\u5982\uff0c<\/span><\/span>\u5f53\u9700\u8981\u4ece\u6570\u636e\u5e76\u884c\u7ec4\u5207\u6362\u5230\u6a21\u578b\u5e76\u884c\u7ec4\u65f6\uff0cAll-to-All\u53ef\u4ee5\u9ad8\u6548\u5730\u91cd\u7ec4\u6570\u636e\u3002<\/span><\/span><\/section>\n

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\u2589 <\/span><\/span><\/span>Ring-base collective<\/span><\/span>\uff08\u57fa\u4e8e\u73af\u7684\u96c6\u5408\uff09<\/span><\/span><\/p>\n


<\/span><\/p>\n

\u6700\u540e\u8fd8\u8981\u63d0\u4e00\u4e2a\u6709\u8da3\u7684\u7ed3\u6784\u2014\u2014\u73af\uff08Ring\uff09\u3002<\/span><\/span><\/p>\n


<\/span><\/p>\n

Ring-base collective\u662f\u5c06\u6240\u6709\u7684\u901a\u4fe1\u8282\u70b9\u901a\u8fc7\u9996\u4f4d\u76f8\u8fde\u5f62\u6210\u4e00\u4e2a\u5355\u5411\u73af\uff0c\u6570\u636e\u5728\u73af\u4e0a\u4f9d\u6b21\u4f20\u8f93\u3002<\/span><\/span><\/p>\n


<\/span><\/p>\n

\u4f20\u8f93\u65b9\u5f0f\u6709\u4e24\u79cd\uff0c\u4e00\u79cd\u662f\u4e00\u6b21\u6027\u4f20\u8f93\u5168\u90e8\uff0c\u8fd8\u6709\u4e00\u79cd\uff0c\u662f\u5bf9\u6570\u636e\u8fdb\u884c\u5207\u5272\uff0c\u7136\u540e\u5206\u522b\u53d1\u9001\u3002<\/span><\/span><\/p>\n


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All-Reduce\u91cc\u6709\u4e00\u79cd<\/span><\/span>Ring All-Reduce\uff08\u73af\u5f62\u5168\u89c4\u7ea6\uff09\u7b97\u6cd5\u3002\u5b83\u662f\u901a\u8fc7\u7ec4\u5408Reduce-Scatter\u548cAll-Gather\u4e24\u4e2a\u64cd\u4f5c\u6765\u5b9e\u73b0\u7684\u3002<\/span><\/span><\/p>\n


<\/span><\/p>\n

Ring All-Reduce\u7b97\u6cd5\u5206\u4e3a\u4e24\u4e2a\u9636\u6bb5\uff1a<\/span><\/span><\/span><\/p>\n


<\/span><\/section>\n

\u7b2c\u4e00\u9636\u6bb5\uff0c\u5c06N\u4e2aworker\u5206\u5e03\u5728\u4e00\u4e2a\u73af\u4e0a\uff0c\u5e76\u4e14\u628a\u6bcf\u4e2aworker\u7684\u6570\u636e\u5206\u6210N\u4efd\u3002<\/span><\/span><\/p>\n


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\u5bf9\u4e8e\u7b2ck\u4e2aworker\uff0c\u8fd9\u4e2aworker\u4f1a\u628a\u7b2ck\u4efd\u6570\u636e\u53d1\u7ed9\u4e0b\u4e00\u4e2aworker\uff0c\u540c\u65f6\u4ece\u524d\u4e00\u4e2aworker\u6536\u5230\u7b2ck-1\u4efd\u6570\u636e\u3002<\/span><\/span><\/p>\n


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\u7136\u540e\uff0c\u7b2ck\u4e2aworker\u4f1a\u628a\u6536\u5230\u7684\u7b2ck-1\u4efd\u6570\u636e\u548c\u81ea\u5df1\u7684\u7b2ck-1\u4efd\u6570\u636e\u6574\u5408\uff0c\u518d\u5c06\u6574\u5408\u7684\u6570\u636e\u53d1\u9001\u7ed9\u4e0b\u4e00\u4e2aworker\u3002<\/span><\/span><\/p>\n


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\u4ee5\u6b64\u5faa\u73afN\u6b21\u4e4b\u540e\uff0c\u6bcf\u4e00\u4e2aworker\u90fd\u4f1a\u5305\u542b\u6700\u7ec8\u6574\u5408\u7ed3\u679c\u7684\u4e00\u4efd\u3002<\/span><\/span><\/p>\n


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\u7b2c\u4e8c\u9636\u6bb5\uff0c\u6bcf\u4e2aworker\u5c06\u6574\u5408\u597d\u7684\u90e8\u5206\u53d1\u9001\u7ed9\u4e0b\u4e00\u4e2aworker\u3002worker\u5728\u6536\u5230\u6570\u636e\u4e4b\u540e\uff0c\u66f4\u65b0\u81ea\u8eab\u6570\u636e\u5bf9\u5e94\u7684\u90e8\u5206\u5373\u53ef\u3002<\/span><\/span><\/p>\n


<\/span><\/p>\n

\u5f88\u663e\u7136\uff0c\u8fd9\u79cd\u73af\u5f62\u7b97\u6cd5\u53ef\u4ee5\u89e3\u51b3\u4f20\u7edf<\/span><\/span>All-Reduce\u4e2dServer\u8282\u70b9\u7684\u80fd\u529b\u74f6\u9888\u95ee\u9898\u3002<\/span><\/span><\/p>\n


<\/span><\/p>\n


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\u2589 <\/span><\/span><\/span>\u6700\u540e\u7684\u8bdd<\/span><\/span><\/section>\n

<\/span><\/section>\n
\u597d\u5566\uff0c\u4ee5\u4e0a\u5c31\u662f\u5e38\u89c1\u901a\u4fe1\u539f\u8bed\u7684\u5177\u4f53\u5de5\u4f5c\u539f\u7406\u3002<\/span><\/span><\/section>\n

<\/span><\/section>\n
AI\u5927\u6a21\u578b\u8bad\u7ec3\u63a8\u7406\u4efb\u52a1\uff0c\u662f\u7531\u6d77\u91cf\u7684GPU\u5171\u540c\u5b8c\u6210\u7684\u3002\u800c\u8fd9\u4e9bGPU\u4e4b\u95f4\u7684\u901a\u4fe1\uff0c\u5c31\u662f\u57fa\u4e8e\u4e0a\u9762\u8fd9\u4e9b\u901a\u4fe1\u539f\u8bed\u6a21\u578b\u3002<\/span><\/span><\/section>\n

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\u4e0b\u4e00\u671f\uff0c\u5c0f\u67a3\u541b\u4f1a\u8be6\u7ec6\u4ecb\u7ecd\u4e00\u4e0b\u5927\u6a21\u578b\u8bad\u63a8\u4efb\u52a1\u4e2d\u7684\u5e76\u884c\u8ba1\u7b97\u65b9\u5f0f\uff0c\u4ee5\u53ca\u8fd9\u4e9b\u901a\u4fe1\u539f\u8bed\u7a76\u7adf\u662f\u5982\u4f55\u8fd0\u7528\u4e8e\u4e0d\u540c\u7684\u5e76\u884c\u8ba1\u7b97\u65b9\u5f0f\u4e2d\u3002<\/span><\/span><\/section>\n

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\u656c\u8bf7\u5173\u6ce8\uff01<\/span><\/span><\/section>\n

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\u6587\u7ae0\u8f6c\u8f7d\u81ea\u5fae\u4fe1\u516c\u4f17\u53f7\uff1a\u9c9c\u67a3\u8bfe\u5802<\/p>\n","protected":false},"excerpt":{"rendered":"

\u6211\u4eec\u5728\u770bAIGC\u5927\u6a21\u578b\u3001\u7b97\u529b\u96c6\u7fa4\u76f8\u5173\u6587\u732e\u7684\u65f6\u5019\uff0c\u7ecf\u5e38\u4f1a\u770b\u5230\u201cAll-Reduce\u201d\u3001\u201cAll-to-All\u201d\u8fd9 […]<\/p>\n","protected":false},"author":1,"featured_media":3367,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[433],"tags":[98,698,699],"class_list":["post-3366","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-433","tag-ai","tag-all-reduce","tag-all-to-all"],"_links":{"self":[{"href":"http:\/\/www.xzclass.com\/index.php?rest_route=\/wp\/v2\/posts\/3366"}],"collection":[{"href":"http:\/\/www.xzclass.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.xzclass.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.xzclass.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.xzclass.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=3366"}],"version-history":[{"count":1,"href":"http:\/\/www.xzclass.com\/index.php?rest_route=\/wp\/v2\/posts\/3366\/revisions"}],"predecessor-version":[{"id":3368,"href":"http:\/\/www.xzclass.com\/index.php?rest_route=\/wp\/v2\/posts\/3366\/revisions\/3368"}],"wp:featuredmedia":[{"embeddable":true,"href":"http:\/\/www.xzclass.com\/index.php?rest_route=\/wp\/v2\/media\/3367"}],"wp:attachment":[{"href":"http:\/\/www.xzclass.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=3366"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.xzclass.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=3366"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.xzclass.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=3366"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}