{"id":34931,"date":"2026-08-09T08:00:37","date_gmt":"2026-08-09T00:00:37","guid":{"rendered":"https:\/\/www.varidata.com\/?p=34931"},"modified":"2026-08-07T16:28:14","modified_gmt":"2026-08-07T08:28:14","slug":"troubleshooting-nvlink-speed-degradation-hardware-issues","status":"publish","type":"post","link":"https:\/\/www.varidata.com\/zh-tw\/blog-tc\/troubleshooting-nvlink-speed-degradation-hardware-issues\/","title":{"rendered":"\u6392\u67e5NVLink\u901f\u5ea6\u964d\u7d1a\u7684\u786c\u9ad4\u554f\u984c"},"content":{"rendered":"<p>\u60a8\u900f\u904e\u7cfb\u7d71\u9059\u6e2c\u5de5\u5177\u5075\u6e2c\u5230\u9ad8\u5bc6\u5ea6\u7bc0\u9ede\u4e2d\u7684\u7269\u7406<a href=\"https:\/\/www.varidata.com\/zh-tw\/blog-tc\/pcie-vs-nvlink-speed-comparison-gpu-interconnect-tech\/\" target=\"_blank\">NVLink<\/a>\u901f\u5ea6\u964d\u7d1a\u3002\u975c\u9ed8\u7684\u786c\u9ad4\u6545\u969c\u4f7f\u60a8\u7684GPU\u7bc0\u9ede\u4fdd\u6301\u6d3b\u52d5\u72c0\u614b\uff0c\u4f46\u9019\u4e9b\u96b1\u85cf\u932f\u8aa4\u6703\u6084\u7136\u524a\u5f31\u5206\u6563\u5f0f\u6a21\u578b\u8a13\u7df4\u6548\u80fd\u3002\u7576\u93c8\u8def\u964d\u7d1a\u8feb\u4f7f\u4e92\u9023\u964d\u81f3PCIe Gen4\u901f\u5ea6\u800c\u975e\u539f\u751f\u983b\u5bec\u6642\uff0c\u901a\u8a0a\u74f6\u9838\u6703\u62d6\u6162\u5927\u578b\u53c3\u6578GPU\u6a21\u578b\u7684\u8a13\u7df4\u3002\u55ae\u500bGPU\u4e92\u9023\u6545\u969c\u6703\u5728\u91cd\u8ca0\u8f09\u4e0b\u964d\u4f4e\u6574\u500b\u53e2\u96c6\u7684\u6548\u7387\u3002\u60a8\u7684\u9996\u8981\u7dad\u904b\u76ee\u6a19\u662f\u5feb\u901f\u9694\u96e2<a href=\"https:\/\/www.varidata.com\/zh-tw\/server\/los-angeles\/\" target=\"_blank\">\u7269\u7406\u786c\u9ad4<\/a>\u7f3a\u9677\uff0c\u5fc5\u9808\u6062\u5fa9\u5b8c\u6574\u7684\u4e92\u9023\u541e\u5410\u91cf\uff0c\u4e26\u9a57\u8b49\u4f3a\u670d\u5668\u4e2d\u6bcf\u500bGPU\u63d2\u69fd\u7684\u7269\u7406\u8a0a\u865f\u5b8c\u6574\u6027\u3002<\/p>\n<h2>\u900f\u904e\u8edf\u9ad4\u8a3a\u65b7NVLink\u901f\u5ea6\u964d\u7d1a<\/h2>\n<p>\u5728\u8a3a\u65b7GPU\u53e2\u96c6\u4e2d\u7684NVLink\u901f\u5ea6\u964d\u7d1a\u6642\uff0c\u8edf\u9ad4\u5de5\u5177\u53ef\u63d0\u4f9b\u5c0d\u7269\u7406\u4e92\u9023\u5065\u5eb7\u72c0\u6cc1\u7684\u5373\u6642\u53ef\u898b\u6027\u3002\u60a8\u53ef\u4ee5\u5728\u786c\u9ad4\u6545\u969c\u4e2d\u65b7\u8a13\u7df4\u904b\u884c\u4e4b\u524d\u8b58\u5225\u983b\u5bec\u74f6\u9838\u3002\u65e9\u671f\u8edf\u9ad4\u5075\u6e2c\u53ef\u9632\u6b62\u96b1\u85cf\u932f\u8aa4\u524a\u5f31\u6574\u9ad4\u7bc0\u9ede\u6548\u80fd\u3002\u7cfb\u7d71\u76e3\u63a7\u5de5\u5177\u53ef\u9694\u96e2\u8907\u96dc\u4e92\u9023\u62d3\u64b2\u4e2d\u7684\u7269\u7406\u8a0a\u865f\u4e1f\u5931\u3002<\/p>\n<h3>\u4f7f\u7528nvidia-smi\u5075\u6e2c\u62d3\u64b2\u6545\u969c<\/h3>\n<p>\u60a8\u5fc5\u9808\u4f7f\u7528\u6a19\u6e96\u7cfb\u7d71\u7ba1\u7406\u5de5\u5177\u9a57\u8b49\u7269\u7406\u93c8\u8def\u9023\u63a5\u3002\u57f7\u884c<code>nvidia-smi topo -m<\/code>\u5c07\u986f\u793a\u7cfb\u7d71\u4e2d\u5b8c\u6574\u7684GPU\u5230GPU\u62d3\u64b2\u77e9\u9663\u3002\u77e9\u9663\u6307\u4ee4\u53ef\u63ed\u793a\u6bcf\u5f35\u5df2\u5b89\u88dd\u52a0\u901f\u5668\u4e4b\u9593\u7684\u76f4\u63a5\u4e92\u9023\u8def\u5f91\u3002\u529f\u80fd\u6b63\u5e38\u7684\u93c8\u8def\u6703\u986f\u793a<code>NV12<\/code>\u6216\u985e\u4f3c\u6a19\u7c64\uff0c\u4ee5\u78ba\u8a8d\u9ad8\u901f\u4e92\u9023\u8def\u5f91\u3002\u640d\u58de\u6216\u672a\u5075\u6e2c\u5230\u7684\u93c8\u8def\u5247\u986f\u793a<code>PHB<\/code>\u3001<code>PIX<\/code>\u6216<code>SYS<\/code>\u4ee3\u78bc\u3002\u9019\u4e9b\u7570\u5e38\u7684\u77e9\u9663\u8f38\u51fa\u610f\u5473\u8457\u6d41\u91cf\u5c07\u900f\u904ePCIe\u6839\u8907\u5408\u9ad4\u8def\u7531\uff0c\u800c\u975e\u76f4\u63a5\u9ad8\u901f\u8def\u5f91\u3002<\/p>\n<p>\u7269\u7406\u8a0a\u865f\u5b8c\u6574\u6027\u554f\u984c\u6703\u89f8\u767c\u81ea\u52d5\u964d\u7d1a\u81f3PCIe Gen4\u901f\u5ea6\uff0864 GB\/s\uff09\u3002\u9019\u7a2e\u964d\u7d1a\u6703\u5728NCCL AllReduce\u64cd\u4f5c\u671f\u9593\u7522\u751f\u5de8\u5927\u7684\u901a\u8a0a\u958b\u92b7\u3002\u60a8\u53ef\u4ee5\u4f7f\u7528\u7279\u5b9a\u7684\u67e5\u8a62\u5de5\u5177\u4f86\u9a57\u8b49\u7576\u524d\u6d3b\u52d5\u901f\u5ea6\u3002<\/p>\n<div class=\"qc-default-table-wrapper \">\n<table style=\"min-width: 100px\">\n<colgroup>\n<col style=\"min-width: 25px\">\n<col style=\"min-width: 25px\">\n<col style=\"min-width: 25px\">\n<col style=\"min-width: 25px\"><\/colgroup>\n<tbody>\n<tr>\n<th colspan=\"1\" rowspan=\"1\">\n<p>\u6aa2\u67e5\u985e\u578b<\/p>\n<\/th>\n<th colspan=\"1\" rowspan=\"1\">\n<p>\u6307\u4ee4\u793a\u4f8b<\/p>\n<\/th>\n<th colspan=\"1\" rowspan=\"1\">\n<p>\u9810\u671f\u8f38\u51fa\uff08\u529f\u80fd\u5b8c\u5168\u6b63\u5e38\uff09<\/p>\n<\/th>\n<th colspan=\"1\" rowspan=\"1\">\n<p>\u9810\u671f\u8f38\u51fa\uff08\u964d\u7d1a\uff0f\u975e\u529f\u80fd\uff09<\/p>\n<\/th>\n<\/tr>\n<tr>\n<td colspan=\"1\" rowspan=\"1\">\n<p>NVLink\u72c0\u614b\u8207\u901f\u5ea6<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p><code>nvidia-smi nvlink -s<\/code><\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u8f38\u51fa\u5217\u51fa\u6d3b\u52d5\u901f\u5ea6\uff0c\u5982<code>25.781250GB\/s<\/code>\u3002<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u8f38\u51fa\u986f\u793a\u6240\u6709\u93c8\u8def\u5747\u70ba\u975e\u6d3b\u52d5\u72c0\u614b\u3002<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td colspan=\"1\" rowspan=\"1\">\n<p>GPU\u62d3\u64b2\u77e9\u9663<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p><code>nvidia-smi topo -m<\/code><\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u77e9\u9663\u5132\u5b58\u683c\u986f\u793a<code>NV<\/code>\u524d\u7db4\uff0c\u5982<code>NV4<\/code>\u3002<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u77e9\u9663\u5132\u5b58\u683c\u986f\u793a<code>SYS<\/code>\u6216<code>PHB<\/code>\u3002<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p>\u932f\u8aa4\u7684\u5c0d\u9f4a\u8def\u7531\u6703\u963b\u6b62\u7cfb\u7d71\u5404rank\u5145\u5206\u5229\u7528\u983b\u5bec\u3002\u7576rank\u932f\u4f4d\u6642\uff0cNCCL AllReduce\u7b49\u57fa\u6e96\u6e2c\u8a66\u6703\u986f\u793a\u51fa\u56b4\u91cd\u7684\u6548\u80fd\u4e0b\u964d\u3002\u6b21\u512a\u7684rank\u6620\u5c04\u6703\u5c0e\u81f4\u4e92\u9023\u6d41\u91cf\u7d93\u904e\u8f03\u6162\u7684\u7bc0\u9ede\u9593\u9023\u63a5\uff0c\u800c\u975e\u672c\u5730\u9ad8\u901f\u532f\u6d41\u6392\u3002\u786c\u9ad4\u6545\u969c\u6703\u5c07\u8a13\u7df4\u4efb\u52d9\u7684\u57fa\u6e96\u983b\u5bec\u9650\u5236\u5728\u9810\u671f\u768450\u201360%\u3002<\/p>\n<h3>\u4f7f\u7528DCGM\u8ffd\u8e64\u8a0a\u865f\u932f\u8aa4\u7387<\/h3>\n<p>\u9059\u6e2c\u5de5\u5177\u900f\u904e\u5373\u6642\u6355\u7372\u93c8\u8def\u932f\u8aa4\u6307\u6a19\u4f86\u9694\u96e2\u786c\u9ad4\u964d\u7d1a\u3002\u60a8\u53ef\u4ee5\u57f7\u884c<code>dcgmi nvlink --errors -g [GPU_ID]<\/code>\u4f86\u6aa2\u67e5\u76ee\u6a19GPU\u55ae\u5143\u4e0a\u7684\u932f\u8aa4\u8a08\u6578\u5668\u3002\u7cfb\u7d71\u6703\u8a18\u9304CRC\u8cc7\u6599\u932f\u8aa4\u3001\u63a5\u6536\u6d41\u63a7\u5236\u6578\u5b57\u932f\u8aa4\u3001\u91cd\u653e\u4e8b\u4ef6\u548c\u6062\u5fa9\u4e8b\u4ef6\u3002\u7269\u7406\u6c61\u67d3\u6216\u7269\u7406\u640d\u58de\u6703\u5c0e\u81f4\u932f\u8aa4\u7387\u4f9d\u5e8f\u7d93\u6b77\u9019\u4e9b\u4e0d\u540c\u968e\u6bb5\u800c\u4e0d\u65b7\u5347\u9ad8\u3002<\/p>\n<ul>\n<li>\n<p>CRC FLIT Error\uff1a\u8a08\u6578\u63a5\u6536\u6d41\u63a7\u5236\u6578\u5b57CRC\u932f\u8aa4\u3002<\/p>\n<\/li>\n<li>\n<p>CRC Data Error\uff1a\u8ffd\u8e64\u63a5\u6536\u8cc7\u6599CRC\u932f\u8aa4\u3002<\/p>\n<\/li>\n<li>\n<p>Replay Error\uff1a\u6e2c\u91cf\u7531\u4e1f\u5305\u5f15\u8d77\u7684\u767c\u9001\u91cd\u653e\u4e8b\u4ef6\u3002<\/p>\n<\/li>\n<li>\n<p>Recovery Error\uff1a\u8a18\u9304\u93c8\u8def\u91cd\u65b0\u8a13\u7df4\u671f\u9593\u7684\u767c\u9001\u6062\u5fa9\u4e8b\u4ef6\u3002<\/p>\n<\/li>\n<\/ul>\n<p>\u672a\u89e3\u6c7a\u7684\u4e92\u9023\u6545\u969c\u6703\u50b3\u64ad\u5230\u76f8\u9130\u786c\u9ad4\u3002\u7814\u7a76\u8868\u660e\uff0c\u572842%\u7684\u89c0\u5bdf\u6848\u4f8b\u4e2d\uff0cNVLink\u932f\u8aa4\u6703\u50b3\u64ad\u5230\u9023\u63a5\u7684GPU\u8a2d\u5099\u3002\u6d3b\u8e8d\u7684\u4e92\u9023\u932f\u8aa4\u670954%\u7684\u6a5f\u7387\u5c0e\u81f4\u4f5c\u696d\u5931\u6557\u3002\u91cd\u8907\u7684\u932f\u8aa4\u4e8b\u4ef6\u8868\u660e\u7269\u7406\u93c8\u8def\u72c0\u6cc1\u60e1\u5316\uff0c\u5f9e\u800c\u7834\u58de\u8a13\u7df4\u7ba1\u9053\u7684\u7a69\u5b9a\u6027\u3002<\/p>\n<blockquote>\n<p><code>DCGM_FR_VOLATILE_DBE_DETECTED<\/code>\uff1a\u5831\u544a\u4e00\u500b\u6216\u591a\u500b\u63ee\u767c\u6027\u96d9\u4f4d\u932f\u8aa4\uff08DBE\uff09\uff08\u81ea\u4e0a\u6b21GPU\u5fa9\u4f4d\u4ee5\u4f86\u4e0d\u53ef\u6062\u5fa9\u7684\u8a18\u61b6\u9ad4\u932f\u8aa4\uff09\u3002<\/p>\n<\/blockquote>\n<p>DCGM\u76e3\u63a7\u7279\u5b9a\u95be\u503c\u4ee5\u6a19\u8a18\u56b4\u91cd\u7684NVLink\u901f\u5ea6\u964d\u7d1a\u3002\u6307\u6a19<code>DCGM_FR_NVLINK_CRC_ERROR_THRESHOLD<\/code>\u5728\u932f\u8aa4\u8d85\u904e\u6bcf\u79d2100\u500bCRC\u932f\u8aa4\u6642\u89f8\u767c\u8b66\u5831\u3002\u95dc\u9375\u4e8b\u4ef6\u9700\u8981\u7acb\u5373\u95dc\u6ce8\uff0c\u56e0\u70ba\u6e05\u9664\u56b4\u91cd\u932f\u8aa4\u9700\u8981\u5c0d\u53d7\u5f71\u97ff\u7684GPU\u63d2\u69fd\u9032\u884c\u5b8c\u5168\u5fa9\u4f4d\u3002\u5728\u6df1\u5ea6\u5b78\u7fd2\u64cd\u4f5c\u671f\u9593\uff0c\u5b8c\u5168\u5fa9\u4f4d\u6703\u9020\u6210\u8d85\u904e2\u5c0f\u6642\u7684\u7bc0\u9ede\u505c\u6a5f\u3002\u60a8\u5fc5\u9808\u53ca\u65e9\u4fee\u5fa9\u9019\u4e9b\u8edf\u9ad4\u8b66\u5831\uff0c\u5c07\u6bcf\u500bGPU\u6062\u5fa9\u5230\u5b8c\u6574\u80fd\u529b\uff0c\u4ee5\u4fdd\u6301\u6700\u4f73\u7cfb\u7d71\u6548\u80fd\u3002<\/p>\n<h2>\u5728\u7269\u7406\u5c64\u6392\u67e5GPU\u53e2\u96c6\u554f\u984c<\/h2>\n<p>\u7576\u8edf\u9ad4\u9059\u6e2c\u6307\u793a\u7269\u7406\u5c64\u6545\u969c\u6642\uff0c\u60a8\u5fc5\u9808\u76f4\u63a5\u8f49\u5411\u7269\u7406\u786c\u9ad4\u5e72\u9810\u3002\u900f\u904e\u5728\u5c08\u7528\u7684\u9632\u975c\u96fb\u5de5\u4f5c\u53f0\u4e0a\u7dad\u4fee\u500b\u5225\u52a0\u901f\u5668\u7bc0\u9ede\u4f86\u9694\u96e2\u7269\u7406\u8a0a\u865f\u4e1f\u5931\u3002\u51b7\u5099\u7528\u7dad\u8b77\u898f\u7a0b\u53ef\u5728\u7269\u7406\u786c\u9ad4\u8655\u7406\u671f\u9593\u4fdd\u8b77\u654f\u611f\u7684\u96fb\u5b50\u8def\u5f91\u3002\u60a8\u5fc5\u9808\u5b8c\u5168\u95dc\u9589\u6574\u500b\u7bc0\u9ede\u4e26\u65b7\u958b\u4e3b\u52d5\u96fb\u6e90\uff0c\u7136\u5f8c\u518d\u6253\u958b\u6a5f\u7bb1\u4ee5\u5b89\u5168\u5730\u57f7\u884cGPU\u53e2\u96c6\u6392\u67e5\u3002<\/p>\n<h3>\u91cd\u65b0\u5b89\u88ddNVLink\u6a4b\u63a5\u5668\u548cSXM\u6a21\u7d44<\/h3>\n<p>\u4e0d\u7a69\u5b9a\u7684\u7269\u7406\u9023\u63a5\u901a\u5e38\u6e90\u65bc\u5c0e\u71b1\u588a\u9b06\u52d5\u3001\u677f\u5361\u5f4e\u66f2\u3001\u5b89\u88dd\u626d\u77e9\u4e0d\u5747\u52fb\u6216\u904b\u884c\u671f\u9593\u7684\u6a5f\u68b0\u632f\u52d5\u3002\u60a8\u5fc5\u9808\u9075\u5faa\u56b4\u683c\u7684\u65b7\u96fb\u6d41\u7a0b\uff0c\u91cd\u7f6e\u6240\u6709\u555f\u7528NVLink\u7684\u786c\u9ad4\u4e0a\u7684\u7269\u7406\u9023\u63a5\uff0c\u800c\u4e0d\u6703\u4f7f\u654f\u611f\u8d70\u7dda\u77ed\u8def\u3002<\/p>\n<ol>\n<li>\n<p>\u5b8c\u5168\u95dc\u9589AI\u4f3a\u670d\u5668\u7bc0\u9ede\uff0c\u91cb\u653e\u6b98\u9918\u96fb\u91cf\uff0c\u4e26\u65b7\u958b\u6240\u6709\u4e3b\u8f38\u5165\u96fb\u6e90\u7dda\u3002<\/p>\n<\/li>\n<li>\n<p>\u5378\u4e0b\u4f3a\u670d\u5668\u9802\u84cb\uff0c\u9732\u51fa\u4e3b\u6a5f\u677f\u7d44\u4ef6\u548cNVLink\u6a4b\u63a5\u55ae\u5143\u3002<\/p>\n<\/li>\n<li>\n<p>\u5c0f\u5fc3\u5730\u5782\u76f4\u5411\u4e0a\u63d0\u8d77\u5169\u5074\u624b\u67c4\uff0c\u62d4\u4e0bNVLink\u6a4b\u63a5\u5668\u3002<\/p>\n<\/li>\n<li>\n<p>\u64f0\u9b06SXM\u57fa\u677f\u56fa\u5b9a\u5668\uff0c\u4ee5\u63a5\u89f8\u6bcf\u5f35\u5df2\u5b89\u88ddGPU\u55ae\u5143\u7684\u4e3b\u63d2\u69fd\u4ecb\u9762\u3002<\/p>\n<\/li>\n<li>\n<p>\u5c0f\u5fc3\u5730\u5f9e\u63d2\u69fd\u4e2d\u63d0\u8d77\u6bcf\u500bGPU\u6a21\u7d44\uff0c\u4f7f\u7528\u4e7e\u71e5\u58d3\u7e2e\u7a7a\u6c23\u6e05\u9664\u63d2\u69fd\u5c0e\u92b7\u4e0a\u7684\u7570\u7269\uff0c\u7136\u5f8c\u5c07\u786c\u9ad4\u7262\u56fa\u5730\u5b89\u88dd\u5230\u4f4d\u3002<\/p>\n<\/li>\n<li>\n<p>\u5782\u76f4\u7528\u529b\u91cd\u65b0\u5b89\u88ddNVLink\u6a4b\u63a5\u5668\uff0c\u4ee5\u78ba\u4fddGPU\u5230GPU\u7684\u7269\u7406\u4e92\u9023\u8def\u5f91\u3002<\/p>\n<\/li>\n<\/ol>\n<p>\u6062\u5fa9\u7269\u7406\u5c0d\u9f4a\u53ef\u4fee\u5fa9\u57fa\u672c\u7684\u63a5\u89f8\u554f\u984c\u3002\u4f46\u662f\uff0c\u5c0d\u96fb\u6c23\u548c\u5149\u5b78\u914d\u5408\u8868\u9762\u7684\u7269\u7406\u6aa2\u67e5\u4ecd\u7136\u81f3\u95dc\u91cd\u8981\u3002<\/p>\n<h3>\u6e05\u6f54\u5149\u5b78\u548c\u9285\u8cea\u4e92\u9023\u89f8\u9ede<\/h3>\n<p>\u9ad2\u6c61\u89f8\u9ede\u3001\u6c27\u5316\u548c\u5f15\u8173\u932f\u4f4d\u6703\u964d\u4f4e\u9ad8\u901f\u901a\u8a0a\u901a\u9053\u7684\u7269\u7406\u8a0a\u865f\u5b8c\u6574\u6027\u3002\u5728\u91cd\u65b0\u7d44\u88dd\u4efb\u4f55GPU\u7cfb\u7d71\u7d44\u4ef6\u4e4b\u524d\uff0c\u60a8\u5fc5\u9808\u5728\u653e\u5927\u689d\u4ef6\u4e0b\u5fb9\u5e95\u6aa2\u67e5\u6240\u6709\u786c\u9ad4\u914d\u5408\u8868\u9762\u3002<\/p>\n<div class=\"qc-default-table-wrapper \">\n<table style=\"min-width: 75px\">\n<colgroup>\n<col style=\"min-width: 25px\">\n<col style=\"min-width: 25px\">\n<col style=\"min-width: 25px\"><\/colgroup>\n<tbody>\n<tr>\n<th colspan=\"1\" rowspan=\"1\">\n<p>\u6aa2\u67e5\u76ee\u6a19<\/p>\n<\/th>\n<th colspan=\"1\" rowspan=\"1\">\n<p>\u63a8\u85a6\u5de5\u5177\uff0f\u6750\u6599<\/p>\n<\/th>\n<th colspan=\"1\" rowspan=\"1\">\n<p>\u76ee\u7684\uff0f\u5099\u8a3b<\/p>\n<\/th>\n<\/tr>\n<tr>\n<td colspan=\"1\" rowspan=\"1\">\n<p>NVLink\u80cc\u677f\uff0f\u9023\u63a5\u5668\u4e0a\u7684\u5f4e\u91dd<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u624b\u96fb\u7b52\u3001\u653e\u5927\u93e1\u3001\u5c16\u982d\u5de5\u5177\uff08\u5982\u63a2\u91dd\uff09\u3001\u5167\u8996\u93e1<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u7528\u65bc\u8996\u89ba\u8b58\u5225\uff0c\u4e26\u5728\u53ef\u80fd\u7684\u60c5\u6cc1\u4e0b\u8f15\u8f15\u6821\u76f4\u5f4e\u91dd\u3002\u5167\u8996\u93e1\u53ef\u6aa2\u67e5\u6df1\u63d2\u69fd\u3002<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u9285\u8cea\u9023\u63a5\u5668\u4e0a\u7684\u6c61\u67d3\u7269<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u7121\u7d68\u64e6\u62ed\u5e03\u3001\u7570\u4e19\u9187\uff08IPA\uff09<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u7528\u65bc\u6e05\u6f54\u9023\u63a5\u5668\u8868\u9762\u7684\u7070\u5875\u6216\u9846\u7c92\uff0c\u78ba\u4fdd\u826f\u597d\u7684\u96fb\u6c23\u63a5\u89f8\u4e26\u9632\u6b62\u93c8\u8def\u6545\u969c\u3002<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p>\u5f4e\u66f2\u7684\u63d2\u91dd\u6703\u4e2d\u65b7\u8cc7\u6599\u50b3\u8f38\u7dda\uff0c\u800c\u8868\u9762\u788e\u5c51\u6703\u964d\u4f4e\u6574\u9ad4\u8a13\u7df4\u6548\u80fd\u3002\u60a8\u9084\u5fc5\u9808\u4ed4\u7d30\u6aa2\u67e5\u6bcf\u53f0GPU\u4f3a\u670d\u5668\u4e0a\u7684\u5149\u5b78\u6536\u767c\u5668\u4ecb\u9762\u3002<\/p>\n<ol>\n<li>\n<p>\u9996\u5148\u4f7f\u7528\u5149\u7e96\u986f\u5fae\u93e1\u6aa2\u67e5\u9023\u63a5\u5668\u3002\u5982\u679c\u4e7e\u6de8\uff0c\u7acb\u5373\u9032\u884c\u914d\u5408\uff1b\u4e0d\u8981\u6e05\u6f54\u3002<\/p>\n<\/li>\n<li>\n<p>\u4f7f\u7528\u7121\u7d68\u64e6\u62ed\u5e03\u6216\u5361\u5f0f\u6e05\u6f54\u5668\u55ae\u6b21\u4e7e\u64e6\u3002\u907f\u514d\u5f80\u5fa9\u904b\u52d5\u3002<\/p>\n<\/li>\n<li>\n<p>\u518d\u6b21\u6aa2\u67e5\u3002\u50c5\u7576\u4ecd\u6709\u6c61\u67d3\u7269\u6642\u518d\u9032\u884c\u6fd5\u6e05\u6f54\u3002<\/p>\n<\/li>\n<li>\n<p>\u6fd5\u6e05\u6f54\uff1a\u4f7f\u7528\u5149\u7e96\u7d1a\u6eb6\u5291\uff08\u975e\u666e\u901aIPA\uff09\u55ae\u6b21\u64e6\u62ed\uff0c\u7136\u5f8c\u7acb\u5373\u4f7f\u7528\u7121\u7d68\u64e6\u62ed\u5e03\u55ae\u6b21\u4e7e\u64e6\u3002\u5207\u52ff\u9023\u7e8c\u9032\u884c\u5169\u6b21\u6fd5\u64e6\u3002<\/p>\n<\/li>\n<li>\n<p>\u9032\u884c\u6700\u7d42\u6aa2\u67e5\u3002\u5982\u679c\u901a\u904e\uff0c\u5247\u9023\u63a5\u5668\u53ef\u4ee5\u9032\u884c\u914d\u5408\u3002<\/p>\n<\/li>\n<\/ol>\n<blockquote>\n<p>\u70ba\u4ec0\u9ebc\u666e\u901aIPA\u4e0d\u9069\u7528\uff1a\u666e\u901a\u7570\u4e19\u9187\uff08IPA\uff09\u5177\u6709\u5438\u6fd5\u6027\uff0c\u84b8\u767c\u7de9\u6162\uff0c\u4e26\u4e14\u7d93\u5e38\u7559\u4e0b\u6bd4\u539f\u59cb\u6c61\u67d3\u7269\u66f4\u96e3\u53bb\u9664\u7684\u6b98\u7559\u7269\u3002\u5c0d\u65bc\u8f15\u5fae\u6c61\u67d3\uff0c\u61c9\u4f7f\u7528\u5149\u7e96\u7d1a\u6e05\u6f54\u6db2\u6216\u5b8c\u5168\u8df3\u904e\u6fd5\u6e05\u6f54\u3002<\/p>\n<\/blockquote>\n<p>\u6b63\u78ba\u7684\u6e05\u6f54\u53ef\u6062\u5fa9\u6574\u500b\u53e2\u96c6\u4e92\u9023\u7d50\u69cb\u4e2d\u539f\u59cb\u7684\u5149\u50b3\u8f38\u901a\u9053\u3002\u5728\u5c07GPU\u4e3b\u6a5f\u91cd\u65b0\u6295\u5165\u751f\u7522\u7ba1\u9053\u4e4b\u524d\uff0c\u60a8\u53ef\u78ba\u4fdd\u9023\u63a5\u7684GPU\u63d2\u69fd\u77e9\u9663\u5177\u6709\u6700\u5927\u7a69\u5b9a\u6027\u3002<\/p>\n<h2>\u89e3\u6c7a\u5c0e\u81f4NVLink\u983b\u5bec\u964d\u4f4e\u7684\u71b1\u5b78\u539f\u56e0<\/h2>\n<h3>\u4fee\u5fa9\u5c40\u90e8NVSwitch\u51b7\u537b\u6545\u969c<\/h3>\n<p>\u6a5f\u7bb1\u5167\u7684\u6975\u7aef\u9ad8\u6eab\u6703\u5c0e\u81f4\u975c\u9ed8\u7684\u786c\u9ad4\u964d\u901f\u3002NVSwitch\u6676\u7247\u4e0a\u7684\u5c40\u90e8\u51b7\u537b\u6545\u969c\u6703\u8fc5\u901f\u7834\u58de\u9ad8\u901f\u4e92\u9023\u7684\u7a69\u5b9a\u6027\u3002\u7576\u5167\u90e8\u6563\u71b1\u5668\u79fb\u4f4d\u6216\u98a8\u6247\u6545\u969c\u6642\uff0c\u76ee\u6a19\u8a2d\u5099\u6703\u7d93\u6b77\u5feb\u901f\u7684\u71b1\u81a8\u8139\u3002\u9019\u7a2e\u71b1\u91cf\u6703\u89f8\u767c\u4fdd\u8b77\u6027\u97cc\u9ad4\u964d\u4f4e\u93c8\u8def\u541e\u5410\u91cf\uff0c\u5f9e\u800c\u5728\u6574\u500bGPU\u4f3a\u670d\u5668\u7bc0\u9ede\u4e0a\u5c0e\u81f4\u56b4\u91cd\u7684NVLink\u901f\u5ea6\u964d\u7d1a\u3002<\/p>\n<p>\u60a8\u53ef\u4ee5\u900f\u904e\u6aa2\u67e5GPU\u7cfb\u7d71\u4e8b\u4ef6\u65e5\u8a8c\u4f86\u8b58\u5225\u9019\u4e9b\u786c\u9ad4\u904e\u71b1\u72c0\u614b\u3002\u7279\u5b9a\u7684\u71b1\u8b66\u544a\u4ee3\u78bc\u6307\u793a\u51b7\u537b\u4e0d\u8db3\u4f55\u6642\u8feb\u4f7f\u4ea4\u63db\u6a5f\u9032\u5165\u8f03\u4f4e\u5de5\u4f5c\u72c0\u614b\u3002<\/p>\n<div class=\"qc-default-table-wrapper \">\n<table style=\"min-width: 75px\">\n<colgroup>\n<col style=\"min-width: 25px\">\n<col style=\"min-width: 25px\">\n<col style=\"min-width: 25px\"><\/colgroup>\n<tbody>\n<tr>\n<th colspan=\"1\" rowspan=\"1\">\n<p>\u932f\u8aa4\u4ee3\u78bc<\/p>\n<\/th>\n<th colspan=\"1\" rowspan=\"1\">\n<p>\u4e8b\u4ef6\u540d\u7a31<\/p>\n<\/th>\n<th colspan=\"1\" rowspan=\"1\">\n<p>\u63cf\u8ff0\u53ca\u5c0d\u6548\u80fd\u7684\u5f71\u97ff<\/p>\n<\/th>\n<\/tr>\n<tr>\n<td colspan=\"1\" rowspan=\"1\">\n<p>10004<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>Host_thermal_event_start<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u6307\u793a\u7cfb\u7d71\u51b7\u537b\u4e0d\u8db3\u3002\u6b64\u4e8b\u4ef6\u53ef\u8feb\u4f7f\u53d7\u5f71\u97ff\u7684NVSwitch\u93c8\u8def\u9032\u5165\u8f03\u4f4e\u529f\u8017\u7684\u55ae\u901a\u9053\u6a21\u5f0f\uff0c\u5f9e\u800c\u964d\u4f4eNVLink\u541e\u5410\u91cf\u548c\u6574\u9ad4\u983b\u5bec\u3002<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td colspan=\"1\" rowspan=\"1\">\n<p>10005<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>Host_thermal_event_end<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u78ba\u8a8d\u7cfb\u7d71\u56e0\u6f5b\u5728\u7684\u51b7\u537b\u554f\u984c\u800c\u7d93\u6b77\u4e86\u71b1\u4e8b\u4ef6\uff0c\u8a72\u4e8b\u4ef6\u66fe\u5f71\u97ff\u93c8\u8def\u6548\u80fd\u3002<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p>\u7576\u4e8b\u4ef610004\u51fa\u73fe\u6642\uff0c\u60a8\u5fc5\u9808\u7acb\u5373\u6aa2\u67e5\u5c0e\u71b1\u4ecb\u9762\u6750\u6599\u3002\u66f4\u63db\u4e7e\u6db8\u7684\u5c0e\u71b1\u818f\u53ef\u6062\u5fa9\u57fa\u677f\u4e0a\u7684\u76f4\u63a5\u71b1\u64f4\u6563\u3002\u78ba\u4fdd\u5e73\u8861\u7684\u6c23\u6d41\u53ef\u7a69\u5b9a\u7d50\u69cb\u6eab\u5ea6\u4e26\u9632\u6b62\u93c8\u8def\u964d\u5165\u55ae\u901a\u9053\u6a21\u5f0f\u3002<\/p>\n<h3>\u7ba1\u7406\u71b1\u7bc0\u6d41\u548c\u52d5\u614b\u529f\u7387\u9650\u5236<\/h3>\n<blockquote>\n<p>\u71b1\u7bc0\u6d41\u662f\u6307GPU\uff08\u6216CPU\uff09\u5728\u9054\u5230\u9810\u5b9a\u7fa9\u6eab\u5ea6\u9650\u5236\u6642\uff0c\u81ea\u52d5\u964d\u4f4e\u6642\u8108\u983b\u7387\u548c\u96fb\u58d3\u4ee5\u9632\u6b62\u904e\u71b1\u3002<\/p>\n<\/blockquote>\n<p>\u60a8\u5fc5\u9808\u5373\u6642\u8ffd\u8e64\u6bcf\u500bGPU\u52a0\u901f\u5668\u7684\u6eab\u5ea6\uff0c\u4ee5\u9632\u6b62\u93c8\u8def\u74f6\u9838\u3002\u904e\u9ad8\u7684\u71b1\u91cf\u6703\u5f37\u5236\u8655\u7406\u5668\u964d\u983b\uff0c\u5f9e\u800c\u505c\u6eef\u6574\u500b\u7d50\u69cb\u4e2d\u7684\u901a\u8a0a\u3002\u5728\u6bcf\u500bGPU\u4e0a\u57f7\u884c\u8a3a\u65b7\u67e5\u8a62\u53ef\u63ed\u793a\u6bcf\u500b\u53d7\u5f71\u97ff\u8655\u7406\u5668\u7684\u78ba\u5207\u964d\u901f\u72c0\u614b\u3002<\/p>\n<div class=\"qc-default-table-wrapper \">\n<table style=\"min-width: 75px\">\n<colgroup>\n<col style=\"min-width: 25px\">\n<col style=\"min-width: 25px\">\n<col style=\"min-width: 25px\"><\/colgroup>\n<tbody>\n<tr>\n<th colspan=\"1\" rowspan=\"1\">\n<p>nvidia-smi\u6307\u4ee4<\/p>\n<\/th>\n<th colspan=\"1\" rowspan=\"1\">\n<p>\u4e3b\u8981\u76ee\u7684<\/p>\n<\/th>\n<th colspan=\"1\" rowspan=\"1\">\n<p>\u8207\u67e5\u8a62\u7684\u76f4\u63a5\u76f8\u95dc\u6027<\/p>\n<\/th>\n<\/tr>\n<tr>\n<td colspan=\"1\" rowspan=\"1\">\n<p><code>nvidia-smi -q -d TEMPERATURE,PERFORMANCE<\/code><\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u986f\u793a\u9810\u8a2d\u7684\u71b1\u964d\u901f\uff0f\u95dc\u6a5f\u95be\u503c\uff0c\u4e26\u5831\u544a\u7576\u524d\u71b1\u7bc0\u6d41\u72c0\u614b\u3002<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u76f4\u63a5\u76e3\u63a7\u71b1\u7bc0\u6d41\u72c0\u614b\u4e26\u986f\u793a\u9810\u8a2d\u95be\u503c\uff0c\u9019\u662f\u4efb\u4f55\u8abf\u6574\u7684\u57fa\u790e\u3002<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u7d50\u5408<code>gpu-burn<\/code>\u8207<code>nvidia-smi<\/code>\u4f7f\u7528<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u5c0dGPU\u55ae\u5143\u9032\u884c\u58d3\u529b\u6e2c\u8a66\u4e26\u76e3\u63a7\u662f\u5426\u767c\u751f\u71b1\u7bc0\u6d41\u3002<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u63d0\u4f9b\u4e00\u7a2e\u65b9\u6cd5\uff0c\u900f\u904e\u5be6\u9a57\u9a57\u8b49\u7576\u524d\u71b1\u95be\u503c\u5728\u8ca0\u8f09\u4e0b\u662f\u5426\u6703\u89f8\u767c\u3002<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p>\u60a8\u53ef\u4ee5\u4f7f\u7528<code>sudo nvidia-smi -pl [\u529f\u7387\u9650\u5236\u503c\uff08\u74e6\u7279\uff09]<\/code>\u4f86\u9650\u5236\u529f\u7387\u6d88\u8017\u3002\u964d\u4f4eGPU\u529f\u8017\u53ef\u76f4\u63a5\u6e1b\u5c11\u71b1\u91cf\u7522\u751f\u3002\u9019\u7a2e\u529f\u7387\u8abf\u6574\u53ef\u4fdd\u6301\u7a69\u5b9a\u7684\u6eab\u5ea6\uff0c\u4e26\u5728\u7e41\u91cd\u5de5\u4f5c\u8ca0\u8f09\u4e0b\u4fdd\u8b77\u6bcf\u500bGPU\u63d2\u69fd\u7684\u7e3dNVLink\u983b\u5bec\u3002\u5728\u958b\u59cb\u751f\u7522\u904b\u884c\u4e4b\u524d\uff0c\u4f7f\u7528GPU\u5de5\u4f5c\u8ca0\u8f09\u5c0d\u7cfb\u7d71\u9032\u884c\u58d3\u529b\u6e2c\u8a66\uff0c\u4ee5\u9a57\u8b49\u60a8\u7684\u71b1\u4fee\u5fa9\u63aa\u65bd\u3002<\/p>\n<h2>\u9a57\u8b49NVLink\u983b\u5bec\u6062\u5fa9<\/h2>\n<h3>\u4f7f\u7528NCCL\u6e2c\u8a66\u5c0d\u4e92\u9023\u9032\u884c\u58d3\u529b\u6e2c\u8a66<\/h3>\n<p>\u60a8\u5fc5\u9808\u57f7\u884c\u6a19\u6e96\u5316\u57fa\u6e96\u6e2c\u8a66\u5957\u4ef6\uff0c\u4ee5\u9a57\u8b49\u6574\u500b\u7d50\u69cb\u4e2d\u7684\u7269\u7406\u786c\u9ad4\u4fee\u5fa9\u3002\u5f9e\u5b98\u65b9<code>nccl-tests<\/code>\u5009\u5eab\u7de8\u8b6f\u4e8c\u9032\u4f4d\u6a94\u6848\uff0c\u4f7f\u60a8\u80fd\u5920\u8de8\u6240\u6709\u7cfb\u7d71\u63d2\u69fd\u57f7\u884c<code>all_reduce_perf<\/code>\u5de5\u5177\u3002\u60a8\u53ef\u4ee5\u4f7f\u7528<code>mpirun<\/code>\u6a19\u8a8c\u555f\u52d5\u53ef\u64f4\u5c55\u7684\u58d3\u529b\u6e2c\u8a66\uff0c\u4ee5\u8a55\u4f30\u9ad8\u8cc7\u6599\u8ca0\u8f09\u4e0b\u7684\u901a\u8a0a\u6548\u7387\u3002<\/p>\n<blockquote>\n<pre><code>mpirun --bind-to none -mca btl tcp,self -mca coll_hcoll_enable 0 -mca btl_tcp_if_include enp27s0np0 -x PATH -x LD_LIBRARY_PATH ${NCCL_TESTS_HOME}\/build\/all_reduce_perf -b 3G -e 24G -f 2 -g 8<\/code><\/pre>\n<\/blockquote>\n<p>\u8a2d\u5b9a\u7279\u5b9a\u7684\u6307\u4ee4\u53c3\u6578\u53ef\u5c07\u8cc7\u6599\u50b3\u8f38\u63a8\u81f3\u6700\u5927\u5bb9\u91cf\u3002\u8d77\u59cb\u7de9\u885d\u5340<code>-b 3G<\/code>\u548c\u7d50\u675f\u7de9\u885d\u5340<code>-e 24G<\/code>\u6a19\u8a8c\u7528\u65bc\u6e2c\u8a66\u4e0d\u540c\u6709\u6548\u8ca0\u8f09\u5927\u5c0f\u4e0b\u7684\u7db2\u8def\u64f4\u5c55\u80fd\u529b\u3002<code>-g 8<\/code>\u6a19\u8a8c\u6307\u5b9a\u5728\u55ae\u53f0\u4e3b\u6a5f\u76848\u500bGPU\u8a2d\u5099\u4e0a\u9032\u884c\u6e2c\u8a66\u3002\u60a8\u53ef\u4ee5\u914d\u7f6e\u74b0\u5883\u8b8a\u6578\uff0c\u5982<code>NCCL_MIN_CTAS<\/code>\u548c<code>NCCL_MAX_CTAS<\/code>\uff0c\u4ee5\u5728\u6548\u80fd\u6e2c\u8a66\u671f\u9593\u5f37\u5236\u7279\u5b9a\u7684\u901a\u9053\u5206\u914d\u3002\u5c07<code>NCCL_NVLS_ENABLE<\/code>\u8a2d\u5b9a\u70ba<code>2<\/code>\u53ef\u5728\u73fe\u4ee3\u7cfb\u7d71\u4e0a\u555f\u7528\u786c\u9ad4\u5378\u8f09\u3002\u6210\u529f\u6e2c\u8a66\u53ef\u78ba\u8a8dNVLink 3.0\u5e73\u53f0\u9054\u5230\u6bcf\u500bGPU\u63d2\u69fd600 GB\/s\u7684\u96d9\u5411\u541e\u5410\u91cf\uff0c\u800cNVLink 4.0\u914d\u7f6e\u5247\u5be6\u73fe\u6bcf\u500bGPU\u55ae\u5143900 GB\/s\u7684\u7e3d\u96d9\u5411\u983b\u5bec\u3002<\/p>\n<h3>\u57f7\u884c\u4fee\u5fa9\u5f8c\u7684\u786c\u9ad4\u6aa2\u67e5\u6e05\u55ae<\/h3>\n<p>\u5728\u5c07GPU\u4f3a\u670d\u5668\u4e3b\u6a5f\u91cd\u65b0\u6295\u5165\u751f\u7522\u7ba1\u9053\u4e4b\u524d\uff0c\u60a8\u9700\u8981\u57f7\u884c\u7cfb\u7d71\u7684\u9a57\u8b49\u5e8f\u5217\u3002<\/p>\n<ol>\n<li>\n<p>\u57f7\u884c<code>nvidia-smi<\/code>\u67e5\u770bGPU\u5c0d\u7b49\u9023\u63a5\u77e9\u9663\uff0c\u4e26\u78ba\u8a8d\u6bcf\u500bGPU\u6a21\u7d44\u4e0a\u7684\u6d3b\u52d5\u93c8\u8def\u72c0\u614b\u3002<\/p>\n<\/li>\n<li>\n<p>\u57f7\u884c<code>nvidia-smi topo -m<\/code>\u6aa2\u67e5GPU\u62d3\u64b2\u8868\uff0c\u4e26\u78ba\u8a8d\u76f4\u63a5\u7d50\u69cb\u8def\u5f91\u3002<\/p>\n<\/li>\n<li>\n<p>\u57f7\u884c<code>nvidia-smi nvlink --status<\/code>\u6aa2\u67e5\u6bcf\u500b\u7269\u7406GPU\u63d2\u69fd\u4e0a\u7684\u5404\u93c8\u8def\u901f\u5ea6\u4e26\u9a57\u8b49\u6d3b\u52d5\u72c0\u614b\u3002<\/p>\n<\/li>\n<li>\n<p>\u57f7\u884cCUDA <code>deviceQuery<\/code>\u7bc4\u4f8b\u7a0b\u5f0f\uff0c\u4ee5\u9a57\u8b49\u8edf\u9ad4\u5c64\u80fd\u8b58\u5225\u5b8c\u5168\u6062\u5fa9\u7684\u786c\u9ad4\u5806\u758a\u3002<\/p>\n<\/li>\n<\/ol>\n<p>\u7cfb\u7d71\u5316\u6aa2\u67e5\u53ef\u78ba\u4fdd\u53e2\u96c6\u4e2d\u6bcf\u500b\u5df2\u5b89\u88dd\u52a0\u901f\u5668\u7684\u9577\u671f\u7a69\u5b9a\u6027\u3002\u9a57\u8b49\u7269\u7406\u93c8\u8def\u72c0\u614b\u53ef\u9632\u6b62\u5728\u7e41\u91cd\u8a13\u7df4\u5de5\u4f5c\u8ca0\u8f09\u671f\u9593\u51fa\u73fe\u901f\u5ea6\u4e0b\u964d\u3002\u5728\u57f7\u884c\u5927\u578b\u6a21\u578b\u8a13\u7df4\u4f5c\u696d\u4e4b\u524d\uff0c\u60a8\u9700\u78ba\u8a8d\u6bcf\u500bGPU\u5230GPU\u4e92\u9023\u8def\u5f91\u7684\u5b8c\u6574\u7269\u7406\u5065\u5eb7\u72c0\u614b\u3002\u5b8c\u6210\u9019\u4e9b\u9a57\u8b49\u6b65\u9a5f\u53ef\u4fdd\u8b49\u6700\u4f73\u7684NVLink\u983b\u5bec\uff0c\u4e26\u4f7f\u7bc0\u9ede\u6062\u5fa9\u751f\u7522\u904b\u884c\u80fd\u529b\u3002<\/p>\n<div class=\"qc-divider-wrapper\">\n<div class=\"qc-divider\" style=\"border-top-style: solid;width: 100%\"><\/div>\n<\/div>\n<p>\u60a8\u900f\u904e\u9075\u5faa\u56b4\u683c\u7684\u5de5\u4f5c\u6d41\u7a0b\u4f86\u89e3\u6c7aNVLink\u901f\u5ea6\u964d\u7d1a\u554f\u984c\u3002\u9996\u5148\uff0c\u57f7\u884c<code>nvidia-smi topo -m<\/code>\u4ee5\u8b58\u5225\u640d\u58de\u7684\u8def\u5f91\u3002\u63a5\u4e0b\u4f86\uff0c\u95dc\u9589\u7cfb\u7d71\u4ee5\u91cd\u65b0\u5b89\u88dd\u6a21\u7d44\u4e26\u6e05\u6f54\u9285\u8cea\u89f8\u9ede\u3002\u4e3b\u52d5\u76e3\u63a7\u8aa4\u78bc\u7387\u53ef\u9632\u6b62\u5927\u578bAI\u53e2\u96c6\u7bc0\u9ede\u4e2d\u51fa\u73fe\u975c\u9ed8\u74f6\u9838\u3002\u7cfb\u7d71\u7ba1\u7406\u54e1\u8ffd\u8e64\u8af8\u5982<code>DCGM_FI_DEV_NVLINK_BANDWIDTH_TOTAL<\/code>\u7b49\u6307\u6a19\u4ee5\u5118\u65e9\u6355\u7372\u6545\u969c\u3002\u60a8\u9084\u9808\u7559\u610fXID 145\u548cXID 149\u7b49\u786c\u9ad4\u8b66\u5831\u3002\u6700\u5f8c\uff0c\u4f7f\u7528NCCL\u5de5\u5177\u57f7\u884c\u58d3\u529b\u6e2c\u8a66\u3002\u5728\u5c07GPU\u7bc0\u9ede\u91cd\u65b0\u6295\u5165\u751f\u7522\u4e4b\u524d\uff0c\u9019\u4e9b\u6e2c\u8a66\u53ef\u9a57\u8b49\u5b8c\u6574\u7684NVLink\u983b\u5bec\u6062\u5fa9\u60c5\u6cc1\u3002<\/p>\n<h2>\u5e38\u898b\u554f\u984c\u89e3\u7b54<\/h2>\n<h3>\u5982\u4f55\u8b58\u5225GPU\u4f3a\u670d\u5668\u4e0a\u964d\u7d1a\u7684NVLink\u9023\u63a5\uff1f<\/h3>\n<p>\u5728GPU\u4e3b\u6a5f\u4e0a\u57f7\u884c<code>nvidia-smi topo -m<\/code>\u3002\u77e9\u9663\u6703\u986f\u793a<code>PIX<\/code>\u6216<code>SYS<\/code>\u4ee3\u78bc\uff0c\u800c\u975e\u6d3b\u52d5\u7684<code>NV<\/code>\u8def\u7531\u3002\u6b64\u72c0\u614b\u8868\u660e\u93c8\u8def\u6545\u969c\uff0c\u8feb\u4f7f\u60a8\u7684GPU\u6d41\u91cf\u8d70\u6162\u901fPCIe\u8def\u5f91\u3002\u60a8\u5fc5\u9808\u6e2c\u8a66\u6bcf\u500bGPU\u63d2\u69fd\u4ee5\u5b9a\u4f4d\u640d\u58de\u7684\u8def\u5f91\u3002<\/p>\n<h3>\u70ba\u4ec0\u9ebc\u7269\u7406GPU\u4e92\u9023\u964d\u7d1a\u6703\u89f8\u767cPCIe\u56de\u9000\uff1f<\/h3>\n<p>\u7269\u7406\u8a0a\u865f\u5b8c\u6574\u6027\u554f\u984c\u6703\u89f8\u767c\u81ea\u52d5\u93c8\u8def\u91cd\u8a66\u3002\u6301\u7e8c\u7684\u932f\u8aa4\u6703\u8feb\u4f7f\u7cfb\u7d71\u5c07\u4e92\u9023\u901f\u5ea6\u964d\u81f3PCIe Gen4\u983b\u5bec\uff0864 GB\/s\uff09\u3002\u9019\u7a2e\u786c\u9ad4\u56de\u9000\u53ef\u9632\u6b62GPU\u5b8c\u5168\u5d29\u6f70\uff0c\u4f46\u56b4\u91cd\u9650\u5236\u6bcf\u500b\u5df2\u9023\u63a5GPU\u7bc0\u9ede\u4e4b\u9593\u7684\u901a\u8a0a\u6548\u80fd\u3002<\/p>\n<h3>\u54ea\u4e9bDCGM\u6307\u6a19\u9810\u793a\u5373\u5c07\u767c\u751f\u7684GPU\u786c\u9ad4\u6545\u969c\uff1f<\/h3>\n<p>\u60a8\u61c9\u76e3\u63a7<code>dcgmi nvlink --errors<\/code>\u4e2d\u4e0d\u65b7\u4e0a\u5347\u7684CRC\u8cc7\u6599\u932f\u8aa4\u548c\u6062\u5fa9\u4e8b\u4ef6\u3002\u6bcf\u79d2\u8d85\u904e100\u500bCRC\u932f\u8aa4\u6703\u7acb\u5373\u89f8\u767c\u7cfb\u7d71\u8b66\u5831\u3002\u5728GPU\u6a21\u7d44\u6216GPU\u57fa\u677f\u63d2\u69fd\u5b8c\u5168\u93c8\u8def\u4e2d\u65b7\u4e4b\u524d\uff0c\u9ad8\u932f\u8aa4\u7387\u5373\u6307\u793a\u7269\u7406\u9023\u63a5\u5668\u640d\u58de\u3002<\/p>\n<h3>\u71b1\u7bc0\u6d41\u5982\u4f55\u5f71\u97ff\u6574\u9ad4GPU\u53e2\u96c6\u541e\u5410\u91cf\uff1f<\/h3>\n<p>\u9ad8\u5de5\u4f5c\u6eab\u5ea6\u6703\u5f37\u5236\u4fdd\u8b77\u6027\u7cfb\u7d71\u97cc\u9ad4\u964d\u4f4eGPU\u6642\u8108\u983b\u7387\u3002\u71b1\u61c9\u529b\u6703\u5c0e\u81f4NVSwitch\u6676\u7247\u9032\u5165\u4f4e\u529f\u8017\u6a21\u5f0f\u3002\u9019\u7a2e\u71b1\u964d\u901f\u6703\u964d\u4f4e\u6bcf\u500b\u5df2\u5b89\u88ddGPU\u8a2d\u5099\u7684\u8cc7\u6599\u50b3\u8f38\u901f\u5ea6\uff0c\u5f9e\u800c\u5728\u6574\u500bGPU\u7bc0\u9ede\u7d44\u4ef6\u4e2d\u5f62\u6210\u5de8\u5927\u7684\u6548\u80fd\u74f6\u9838\u3002<\/p>\n<h3>\u786c\u9ad4\u4fee\u5fa9\u5f8c\uff0c\u54ea\u500b\u57fa\u6e96\u6e2c\u8a66\u53ef\u78ba\u8a8dGPU\u983b\u5bec\u5b8c\u5168\u6062\u5fa9\uff1f<\/h3>\n<p>\u60a8\u53ef\u4ee5\u8de8\u6240\u6709\u76ee\u6a19rank\u57f7\u884cNCCL <code>all_reduce_perf<\/code>\u6e2c\u8a66\u3002\u8a72\u57fa\u6e96\u6e2c\u8a66\u6703\u63a8\u52d5\u6709\u6548\u8ca0\u8f09\u50b3\u8f38\u7d93\u904e\u6bcf\u500bGPU\u63d2\u69fd\u3002\u9054\u5230\u9810\u671f\u901f\u5ea6\uff08\u4f8b\u5982\u73fe\u4ee3\u7cfb\u7d71\u4e0a\u7684900 GB\/s\uff09\u53ef\u78ba\u8a8dGPU\u7d50\u69cb\u5df2\u5b8c\u5168\u4fee\u5fa9\uff0c\u4e4b\u5f8c\u60a8\u53ef\u5c07GPU\u4f3a\u670d\u5668\u91cd\u65b0\u6295\u5165\u751f\u7522\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u60a8\u900f\u904e\u7cfb\u7d71\u9059\u6e2c\u5de5\u5177\u5075\u6e2c\u5230\u9ad8\u5bc6\u5ea6\u7bc0\u9ede\u4e2d\u7684\u7269\u7406NVLink\u901f\u5ea6\u964d\u7d1a\u3002\u975c\u9ed8\u7684\u786c\u9ad4\u6545\u969c\u4f7f\u60a8\u7684GPU\u7bc0\u9ede\u4fdd\u6301\u6d3b\u52d5\u72c0\u614b\uff0c\u4f46 [&#8230;]<\/p>\n<p><a class=\"btn btn-secondary understrap-read-more-link\" href=\"https:\/\/www.varidata.com\/zh-tw\/blog-tc\/troubleshooting-nvlink-speed-degradation-hardware-issues\/\">Read More&#8230;<\/a><\/p>\n","protected":false},"author":12,"featured_media":34927,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[267],"tags":[],"class_list":["post-34931","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog-tc"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>\u6392\u67e5NVLink\u901f\u5ea6\u964d\u7d1a\u7684\u786c\u9ad4\u554f\u984c<\/title>\n<meta name=\"description\" content=\"\u4fee\u5fa9AI\u4f3a\u670d\u5668\u4e2d\u7684NVLink\u901f\u5ea6\u964d\u7d1a\u554f\u984c\u3002\u8a3a\u65b7\u8edf\u9ad4\u6307\u6a19\u3001\u91cd\u65b0\u5b89\u88dd\u786c\u9ad4\u3001\u7ba1\u7406\u71b1\u7bc0\u6d41\uff0c\u4e26\u900f\u904eNCCL\u6e2c\u8a66\u9a57\u8b49\u983b\u5bec\u3002\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, 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