{"id":34930,"date":"2026-08-09T08:00:37","date_gmt":"2026-08-09T00:00:37","guid":{"rendered":"https:\/\/www.varidata.com\/?p=34930"},"modified":"2026-08-07T16:20:25","modified_gmt":"2026-08-07T08:20:25","slug":"troubleshooting-nvlink-speed-degradation-hardware-issues","status":"publish","type":"post","link":"https:\/\/www.varidata.com\/zh-cn\/blog\/troubleshooting-nvlink-speed-degradation-hardware-issues\/","title":{"rendered":"\u6392\u67e5NVLink\u901f\u5ea6\u964d\u7ea7\u7684\u786c\u4ef6\u95ee\u9898"},"content":{"rendered":"\n<p>\u60a8\u901a\u8fc7\u7cfb\u7edf\u9065\u6d4b\u5de5\u5177\u68c0\u6d4b\u5230\u9ad8\u5bc6\u5ea6\u8282\u70b9\u4e2d\u7684\u7269\u7406<a href=\"https:\/\/www.varidata.com\/zh-cn\/blog\/pcie-vs-nvlink-speed-comparison-gpu-interconnect-tech\/\" target=\"_blank\">NVLink<\/a>\u901f\u5ea6\u964d\u7ea7\u3002\u9759\u9ed8\u7684\u786c\u4ef6\u6545\u969c\u4f7f\u60a8\u7684GPU\u8282\u70b9\u4fdd\u6301\u6d3b\u52a8\u72b6\u6001\uff0c\u4f46\u8fd9\u4e9b\u9690\u85cf\u9519\u8bef\u4f1a\u6084\u7136\u524a\u5f31\u5206\u5e03\u5f0f\u6a21\u578b\u8bad\u7ec3\u6027\u80fd\u3002\u5f53\u94fe\u8def\u964d\u7ea7\u8feb\u4f7f\u4e92\u8fde\u964d\u81f3PCIe Gen4\u901f\u5ea6\u800c\u975e\u539f\u751f\u5e26\u5bbd\u65f6\uff0c\u901a\u4fe1\u74f6\u9888\u4f1a\u62d6\u6162\u5927\u578b\u53c2\u6570GPU\u6a21\u578b\u7684\u8bad\u7ec3\u3002\u5355\u4e2aGPU\u4e92\u8fde\u6545\u969c\u4f1a\u5728\u91cd\u8d1f\u8f7d\u4e0b\u964d\u4f4e\u6574\u4e2a\u96c6\u7fa4\u7684\u6548\u7387\u3002\u60a8\u7684\u9996\u8981\u8fd0\u7ef4\u76ee\u6807\u662f\u5feb\u901f\u9694\u79bb<a href=\"https:\/\/www.varidata.com\/zh-cn\/server\/los-angeles\/\" target=\"_blank\">\u7269\u7406\u786c\u4ef6<\/a>\u7f3a\u9677\uff0c\u5fc5\u987b\u6062\u590d\u5b8c\u6574\u7684\u4e92\u8fde\u541e\u5410\u91cf\uff0c\u5e76\u9a8c\u8bc1\u670d\u52a1\u5668\u4e2d\u6bcf\u4e2aGPU\u63d2\u69fd\u7684\u7269\u7406\u4fe1\u53f7\u5b8c\u6574\u6027\u3002<\/p>\n<h2>\u901a\u8fc7\u8f6f\u4ef6\u8bca\u65adNVLink\u901f\u5ea6\u964d\u7ea7<\/h2>\n<p>\u5728\u8bca\u65adGPU\u96c6\u7fa4\u4e2d\u7684NVLink\u901f\u5ea6\u964d\u7ea7\u65f6\uff0c\u8f6f\u4ef6\u5de5\u5177\u53ef\u63d0\u4f9b\u5bf9\u7269\u7406\u4e92\u8fde\u5065\u5eb7\u72b6\u51b5\u7684\u5373\u65f6\u53ef\u89c1\u6027\u3002\u60a8\u53ef\u4ee5\u5728\u786c\u4ef6\u6545\u969c\u4e2d\u65ad\u8bad\u7ec3\u8fd0\u884c\u4e4b\u524d\u8bc6\u522b\u5e26\u5bbd\u74f6\u9888\u3002\u65e9\u671f\u8f6f\u4ef6\u68c0\u6d4b\u53ef\u9632\u6b62\u9690\u85cf\u9519\u8bef\u524a\u5f31\u6574\u4f53\u8282\u70b9\u6027\u80fd\u3002\u7cfb\u7edf\u76d1\u63a7\u5de5\u5177\u53ef\u9694\u79bb\u590d\u6742\u4e92\u8fde\u62d3\u6251\u4e2d\u7684\u7269\u7406\u4fe1\u53f7\u4e22\u5931\u3002<\/p>\n<h3>\u4f7f\u7528nvidia-smi\u68c0\u6d4b\u62d3\u6251\u6545\u969c<\/h3>\n<p>\u60a8\u5fc5\u987b\u4f7f\u7528\u6807\u51c6\u7cfb\u7edf\u7ba1\u7406\u5de5\u5177\u9a8c\u8bc1\u7269\u7406\u94fe\u8def\u8fde\u63a5\u3002\u8fd0\u884c<code>nvidia-smi topo -m<\/code>\u5c06\u663e\u793a\u7cfb\u7edf\u4e2d\u5b8c\u6574\u7684GPU\u5230GPU\u62d3\u6251\u77e9\u9635\u3002\u77e9\u9635\u547d\u4ee4\u53ef\u63ed\u793a\u6bcf\u5757\u5df2\u5b89\u88c5\u52a0\u901f\u5668\u4e4b\u95f4\u7684\u76f4\u63a5\u4e92\u8fde\u8def\u5f84\u3002\u529f\u80fd\u6b63\u5e38\u7684\u94fe\u8def\u4f1a\u663e\u793a<code>NV12<\/code>\u6216\u7c7b\u4f3c\u6807\u7b7e\uff0c\u4ee5\u786e\u8ba4\u9ad8\u901f\u4e92\u8fde\u8def\u5f84\u3002\u635f\u574f\u6216\u672a\u68c0\u6d4b\u5230\u7684\u94fe\u8def\u5219\u663e\u793a<code>PHB<\/code>\u3001<code>PIX<\/code>\u6216<code>SYS<\/code>\u4ee3\u7801\u3002\u8fd9\u4e9b\u5f02\u5e38\u7684\u77e9\u9635\u8f93\u51fa\u610f\u5473\u7740\u6d41\u91cf\u5c06\u901a\u8fc7PCIe\u6839\u590d\u5408\u4f53\u8def\u7531\uff0c\u800c\u975e\u76f4\u63a5\u9ad8\u901f\u8def\u5f84\u3002<\/p>\n<p>\u7269\u7406\u4fe1\u53f7\u5b8c\u6574\u6027\u95ee\u9898\u4f1a\u89e6\u53d1\u81ea\u52a8\u964d\u7ea7\u81f3PCIe Gen4\u901f\u5ea6\uff0864 GB\/s\uff09\u3002\u8fd9\u79cd\u964d\u7ea7\u4f1a\u5728NCCL AllReduce\u64cd\u4f5c\u671f\u95f4\u4ea7\u751f\u5de8\u5927\u7684\u901a\u4fe1\u5f00\u9500\u3002\u60a8\u53ef\u4ee5\u4f7f\u7528\u7279\u5b9a\u7684\u67e5\u8be2\u5de5\u5177\u6765\u9a8c\u8bc1\u5f53\u524d\u6d3b\u52a8\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>\u68c0\u67e5\u7c7b\u578b<\/p>\n<\/th>\n<th colspan=\"1\" rowspan=\"1\">\n<p>\u547d\u4ee4\u793a\u4f8b<\/p>\n<\/th>\n<th colspan=\"1\" rowspan=\"1\">\n<p>\u9884\u671f\u8f93\u51fa\uff08\u529f\u80fd\u5b8c\u5168\u6b63\u5e38\uff09<\/p>\n<\/th>\n<th colspan=\"1\" rowspan=\"1\">\n<p>\u9884\u671f\u8f93\u51fa\uff08\u964d\u7ea7\/\u975e\u529f\u80fd\uff09<\/p>\n<\/th>\n<\/tr>\n<tr>\n<td colspan=\"1\" rowspan=\"1\">\n<p>NVLink\u72b6\u6001\u4e0e\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>\u8f93\u51fa\u5217\u51fa\u6d3b\u52a8\u901f\u5ea6\uff0c\u5982<code>25.781250GB\/s<\/code>\u3002<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u8f93\u51fa\u663e\u793a\u6240\u6709\u94fe\u8def\u5747\u4e3a\u975e\u6d3b\u52a8\u72b6\u6001\u3002<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td colspan=\"1\" rowspan=\"1\">\n<p>GPU\u62d3\u6251\u77e9\u9635<\/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\u9635\u5355\u5143\u683c\u663e\u793a<code>NV<\/code>\u524d\u7f00\uff0c\u5982<code>NV4<\/code>\u3002<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u77e9\u9635\u5355\u5143\u683c\u663e\u793a<code>SYS<\/code>\u6216<code>PHB<\/code>\u3002<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p>\u9519\u8bef\u7684\u5bf9\u9f50\u8def\u7531\u4f1a\u963b\u6b62\u7cfb\u7edf\u5404rank\u5145\u5206\u5229\u7528\u5e26\u5bbd\u3002\u5f53rank\u9519\u4f4d\u65f6\uff0cNCCL AllReduce\u7b49\u57fa\u51c6\u6d4b\u8bd5\u4f1a\u663e\u793a\u51fa\u4e25\u91cd\u7684\u6027\u80fd\u4e0b\u964d\u3002\u6b21\u4f18\u7684rank\u6620\u5c04\u4f1a\u5bfc\u81f4\u4e92\u8fde\u6d41\u91cf\u7ecf\u8fc7\u8f83\u6162\u7684\u8282\u70b9\u95f4\u8fde\u63a5\uff0c\u800c\u975e\u672c\u5730\u9ad8\u901f\u603b\u7ebf\u3002\u786c\u4ef6\u6545\u969c\u4f1a\u5c06\u8bad\u7ec3\u4efb\u52a1\u7684\u57fa\u51c6\u5e26\u5bbd\u9650\u5236\u5728\u9884\u671f\u768450\u201360%\u3002<\/p>\n<h3>\u4f7f\u7528DCGM\u8ddf\u8e2a\u4fe1\u53f7\u9519\u8bef\u7387<\/h3>\n<p>\u9065\u6d4b\u5de5\u5177\u901a\u8fc7\u5b9e\u65f6\u6355\u83b7\u94fe\u8def\u9519\u8bef\u6307\u6807\u6765\u9694\u79bb\u786c\u4ef6\u964d\u7ea7\u3002\u60a8\u53ef\u4ee5\u8fd0\u884c<code>dcgmi nvlink --errors -g [GPU_ID]<\/code>\u6765\u68c0\u67e5\u76ee\u6807GPU\u5355\u5143\u4e0a\u7684\u9519\u8bef\u8ba1\u6570\u5668\u3002\u7cfb\u7edf\u4f1a\u8bb0\u5f55CRC\u6570\u636e\u9519\u8bef\u3001\u63a5\u6536\u6d41\u63a7\u5236\u6570\u5b57\u9519\u8bef\u3001\u91cd\u653e\u4e8b\u4ef6\u548c\u6062\u590d\u4e8b\u4ef6\u3002\u7269\u7406\u6c61\u67d3\u6216\u7269\u7406\u635f\u574f\u4f1a\u5bfc\u81f4\u9519\u8bef\u7387\u4f9d\u6b21\u7ecf\u5386\u8fd9\u4e9b\u4e0d\u540c\u9636\u6bb5\u800c\u4e0d\u65ad\u5347\u9ad8\u3002<\/p>\n<ul>\n<li>\n<p>CRC FLIT Error\uff1a\u8ba1\u6570\u63a5\u6536\u6d41\u63a7\u5236\u6570\u5b57CRC\u9519\u8bef\u3002<\/p>\n<\/li>\n<li>\n<p>CRC Data Error\uff1a\u8ddf\u8e2a\u63a5\u6536\u6570\u636eCRC\u9519\u8bef\u3002<\/p>\n<\/li>\n<li>\n<p>Replay Error\uff1a\u6d4b\u91cf\u7531\u4e22\u5305\u5f15\u8d77\u7684\u53d1\u9001\u91cd\u653e\u4e8b\u4ef6\u3002<\/p>\n<\/li>\n<li>\n<p>Recovery Error\uff1a\u8bb0\u5f55\u94fe\u8def\u91cd\u65b0\u8bad\u7ec3\u671f\u95f4\u7684\u53d1\u9001\u6062\u590d\u4e8b\u4ef6\u3002<\/p>\n<\/li>\n<\/ul>\n<p>\u672a\u89e3\u51b3\u7684\u4e92\u8fde\u6545\u969c\u4f1a\u4f20\u64ad\u5230\u76f8\u90bb\u786c\u4ef6\u3002\u7814\u7a76\u8868\u660e\uff0c\u572842%\u7684\u89c2\u5bdf\u6848\u4f8b\u4e2d\uff0cNVLink\u9519\u8bef\u4f1a\u4f20\u64ad\u5230\u8fde\u63a5\u7684GPU\u8bbe\u5907\u3002\u6d3b\u8dc3\u7684\u4e92\u8fde\u9519\u8bef\u670954%\u7684\u6982\u7387\u5bfc\u81f4\u4f5c\u4e1a\u5931\u8d25\u3002\u91cd\u590d\u7684\u9519\u8bef\u4e8b\u4ef6\u8868\u660e\u7269\u7406\u94fe\u8def\u72b6\u51b5\u6076\u5316\uff0c\u4ece\u800c\u7834\u574f\u8bad\u7ec3\u7ba1\u9053\u7684\u7a33\u5b9a\u6027\u3002<\/p>\n<blockquote>\n<p><code>DCGM_FR_VOLATILE_DBE_DETECTED<\/code>\uff1a\u62a5\u544a\u4e00\u4e2a\u6216\u591a\u4e2a\u6613\u5931\u6027\u53cc\u4f4d\u9519\u8bef\uff08DBE\uff09\uff08\u81ea\u4e0a\u6b21GPU\u590d\u4f4d\u4ee5\u6765\u4e0d\u53ef\u6062\u590d\u7684\u5185\u5b58\u9519\u8bef\uff09\u3002<\/p>\n<\/blockquote>\n<p>DCGM\u76d1\u63a7\u7279\u5b9a\u9608\u503c\u4ee5\u6807\u8bb0\u4e25\u91cd\u7684NVLink\u901f\u5ea6\u964d\u7ea7\u3002\u6307\u6807<code>DCGM_FR_NVLINK_CRC_ERROR_THRESHOLD<\/code>\u5728\u9519\u8bef\u8d85\u8fc7\u6bcf\u79d2100\u4e2aCRC\u9519\u8bef\u65f6\u89e6\u53d1\u8b66\u62a5\u3002\u5173\u952e\u4e8b\u4ef6\u9700\u8981\u7acb\u5373\u5173\u6ce8\uff0c\u56e0\u4e3a\u6e05\u9664\u4e25\u91cd\u9519\u8bef\u9700\u8981\u5bf9\u53d7\u5f71\u54cd\u7684GPU\u63d2\u69fd\u8fdb\u884c\u5b8c\u5168\u590d\u4f4d\u3002\u5728\u6df1\u5ea6\u5b66\u4e60\u64cd\u4f5c\u671f\u95f4\uff0c\u5b8c\u5168\u590d\u4f4d\u4f1a\u9020\u6210\u8d85\u8fc72\u5c0f\u65f6\u7684\u8282\u70b9\u505c\u673a\u3002\u60a8\u5fc5\u987b\u53ca\u65e9\u4fee\u590d\u8fd9\u4e9b\u8f6f\u4ef6\u8b66\u62a5\uff0c\u5c06\u6bcf\u4e2aGPU\u6062\u590d\u5230\u5b8c\u6574\u80fd\u529b\uff0c\u4ee5\u4fdd\u6301\u6700\u4f73\u7cfb\u7edf\u6027\u80fd\u3002<\/p>\n<h2>\u5728\u7269\u7406\u5c42\u6392\u67e5GPU\u96c6\u7fa4\u95ee\u9898<\/h2>\n<p>\u5f53\u8f6f\u4ef6\u9065\u6d4b\u6307\u793a\u7269\u7406\u5c42\u6545\u969c\u65f6\uff0c\u60a8\u5fc5\u987b\u76f4\u63a5\u8f6c\u5411\u7269\u7406\u786c\u4ef6\u5e72\u9884\u3002\u901a\u8fc7\u5728\u4e13\u7528\u7684\u9632\u9759\u7535\u5de5\u4f5c\u53f0\u4e0a\u7ef4\u4fee\u5355\u4e2a\u52a0\u901f\u5668\u8282\u70b9\u6765\u9694\u79bb\u7269\u7406\u4fe1\u53f7\u4e22\u5931\u3002\u51b7\u5907\u7528\u7ef4\u62a4\u89c4\u7a0b\u53ef\u5728\u7269\u7406\u786c\u4ef6\u5904\u7406\u671f\u95f4\u4fdd\u62a4\u654f\u611f\u7684\u7535\u5b50\u8def\u5f84\u3002\u60a8\u5fc5\u987b\u5b8c\u5168\u5173\u95ed\u6574\u4e2a\u8282\u70b9\u5e76\u65ad\u5f00\u4e3b\u52a8\u7535\u6e90\uff0c\u7136\u540e\u518d\u6253\u5f00\u673a\u7bb1\u4ee5\u5b89\u5168\u5730\u6267\u884cGPU\u96c6\u7fa4\u6392\u67e5\u3002<\/p>\n<h3>\u91cd\u65b0\u5b89\u88c5NVLink\u6865\u63a5\u5668\u548cSXM\u6a21\u5757<\/h3>\n<p>\u4e0d\u7a33\u5b9a\u7684\u7269\u7406\u8fde\u63a5\u901a\u5e38\u6e90\u4e8e\u5bfc\u70ed\u57ab\u677e\u52a8\u3001\u677f\u5361\u5f2f\u66f2\u3001\u5b89\u88c5\u626d\u77e9\u4e0d\u5747\u5300\u6216\u8fd0\u884c\u671f\u95f4\u7684\u673a\u68b0\u632f\u52a8\u3002\u60a8\u5fc5\u987b\u9075\u5faa\u4e25\u683c\u7684\u65ad\u7535\u6d41\u7a0b\uff0c\u91cd\u7f6e\u6240\u6709\u542f\u7528NVLink\u7684\u786c\u4ef6\u4e0a\u7684\u7269\u7406\u8fde\u63a5\uff0c\u800c\u4e0d\u4f1a\u4f7f\u654f\u611f\u8d70\u7ebf\u77ed\u8def\u3002<\/p>\n<ol>\n<li>\n<p>\u5b8c\u5168\u5173\u95edAI\u670d\u52a1\u5668\u8282\u70b9\uff0c\u91ca\u653e\u6b8b\u4f59\u7535\u91cf\uff0c\u5e76\u65ad\u5f00\u6240\u6709\u4e3b\u8f93\u5165\u7535\u6e90\u7ebf\u3002<\/p>\n<\/li>\n<li>\n<p>\u5378\u4e0b\u670d\u52a1\u5668\u9876\u76d6\uff0c\u9732\u51fa\u4e3b\u677f\u7ec4\u4ef6\u548cNVLink\u6865\u63a5\u5355\u5143\u3002<\/p>\n<\/li>\n<li>\n<p>\u5c0f\u5fc3\u5730\u5782\u76f4\u5411\u4e0a\u63d0\u8d77\u4e24\u4fa7\u624b\u67c4\uff0c\u62d4\u4e0bNVLink\u6865\u63a5\u5668\u3002<\/p>\n<\/li>\n<li>\n<p>\u62e7\u677eSXM\u57fa\u677f\u56fa\u5b9a\u5668\uff0c\u4ee5\u63a5\u89e6\u6bcf\u5757\u5df2\u5b89\u88c5GPU\u5355\u5143\u7684\u4e3b\u63d2\u69fd\u63a5\u53e3\u3002<\/p>\n<\/li>\n<li>\n<p>\u5c0f\u5fc3\u5730\u4ece\u63d2\u69fd\u4e2d\u63d0\u8d77\u6bcf\u4e2aGPU\u6a21\u5757\uff0c\u4f7f\u7528\u5e72\u71e5\u538b\u7f29\u7a7a\u6c14\u6e05\u9664\u63d2\u69fd\u5bfc\u9500\u4e0a\u7684\u5f02\u7269\uff0c\u7136\u540e\u5c06\u786c\u4ef6\u7262\u56fa\u5730\u5b89\u88c5\u5230\u4f4d\u3002<\/p>\n<\/li>\n<li>\n<p>\u5782\u76f4\u7528\u529b\u91cd\u65b0\u5b89\u88c5NVLink\u6865\u63a5\u5668\uff0c\u4ee5\u786e\u4fddGPU\u5230GPU\u7684\u7269\u7406\u4e92\u8fde\u8def\u5f84\u3002<\/p>\n<\/li>\n<\/ol>\n<p>\u6062\u590d\u7269\u7406\u5bf9\u9f50\u53ef\u4fee\u590d\u57fa\u672c\u7684\u63a5\u89e6\u95ee\u9898\u3002\u4f46\u662f\uff0c\u5bf9\u7535\u6c14\u548c\u5149\u5b66\u914d\u5408\u8868\u9762\u7684\u7269\u7406\u68c0\u67e5\u4ecd\u7136\u81f3\u5173\u91cd\u8981\u3002<\/p>\n<h3>\u6e05\u6d01\u5149\u5b66\u548c\u94dc\u8d28\u4e92\u8fde\u89e6\u70b9<\/h3>\n<p>\u810f\u6c61\u89e6\u70b9\u3001\u6c27\u5316\u548c\u5f15\u811a\u9519\u4f4d\u4f1a\u964d\u4f4e\u9ad8\u901f\u901a\u4fe1\u901a\u9053\u7684\u7269\u7406\u4fe1\u53f7\u5b8c\u6574\u6027\u3002\u5728\u91cd\u65b0\u7ec4\u88c5\u4efb\u4f55GPU\u7cfb\u7edf\u7ec4\u4ef6\u4e4b\u524d\uff0c\u60a8\u5fc5\u987b\u5728\u653e\u5927\u6761\u4ef6\u4e0b\u5f7b\u5e95\u68c0\u67e5\u6240\u6709\u786c\u4ef6\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>\u68c0\u67e5\u76ee\u6807<\/p>\n<\/th>\n<th colspan=\"1\" rowspan=\"1\">\n<p>\u63a8\u8350\u5de5\u5177\/\u6750\u6599<\/p>\n<\/th>\n<th colspan=\"1\" rowspan=\"1\">\n<p>\u76ee\u7684\/\u5907\u6ce8<\/p>\n<\/th>\n<\/tr>\n<tr>\n<td colspan=\"1\" rowspan=\"1\">\n<p>NVLink\u80cc\u677f\/\u8fde\u63a5\u5668\u4e0a\u7684\u5f2f\u9488<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u624b\u7535\u7b52\u3001\u653e\u5927\u955c\u3001\u5c16\u5934\u5de5\u5177\uff08\u5982\u63a2\u9488\uff09\u3001\u5185\u7aa5\u955c<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u7528\u4e8e\u89c6\u89c9\u8bc6\u522b\uff0c\u5e76\u5728\u53ef\u80fd\u7684\u60c5\u51b5\u4e0b\u8f7b\u8f7b\u6821\u76f4\u5f2f\u9488\u3002\u5185\u7aa5\u955c\u53ef\u68c0\u67e5\u6df1\u63d2\u69fd\u3002<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u94dc\u8d28\u8fde\u63a5\u5668\u4e0a\u7684\u6c61\u67d3\u7269<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u65e0\u7ed2\u64e6\u62ed\u5e03\u3001\u5f02\u4e19\u9187\uff08IPA\uff09<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u7528\u4e8e\u6e05\u6d01\u8fde\u63a5\u5668\u8868\u9762\u7684\u7070\u5c18\u6216\u9897\u7c92\uff0c\u786e\u4fdd\u826f\u597d\u7684\u7535\u6c14\u63a5\u89e6\u5e76\u9632\u6b62\u94fe\u8def\u6545\u969c\u3002<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p>\u5f2f\u66f2\u7684\u63d2\u9488\u4f1a\u4e2d\u65ad\u6570\u636e\u4f20\u8f93\u7ebf\uff0c\u800c\u8868\u9762\u788e\u5c51\u4f1a\u964d\u4f4e\u6574\u4f53\u8bad\u7ec3\u6027\u80fd\u3002\u60a8\u8fd8\u5fc5\u987b\u4ed4\u7ec6\u68c0\u67e5\u6bcf\u53f0GPU\u670d\u52a1\u5668\u4e0a\u7684\u5149\u5b66\u6536\u53d1\u5668\u63a5\u53e3\u3002<\/p>\n<ol>\n<li>\n<p>\u9996\u5148\u4f7f\u7528\u5149\u7ea4\u663e\u5fae\u955c\u68c0\u67e5\u8fde\u63a5\u5668\u3002\u5982\u679c\u5e72\u51c0\uff0c\u7acb\u5373\u8fdb\u884c\u914d\u5408\uff1b\u4e0d\u8981\u6e05\u6d01\u3002<\/p>\n<\/li>\n<li>\n<p>\u4f7f\u7528\u65e0\u7ed2\u64e6\u62ed\u5e03\u6216\u5361\u5f0f\u6e05\u6d01\u5668\u5355\u6b21\u5e72\u64e6\u3002\u907f\u514d\u5f80\u590d\u8fd0\u52a8\u3002<\/p>\n<\/li>\n<li>\n<p>\u518d\u6b21\u68c0\u67e5\u3002\u4ec5\u5f53\u4ecd\u6709\u6c61\u67d3\u7269\u65f6\u518d\u8fdb\u884c\u6e7f\u6e05\u6d01\u3002<\/p>\n<\/li>\n<li>\n<p>\u6e7f\u6e05\u6d01\uff1a\u4f7f\u7528\u5149\u7ea4\u7ea7\u6eb6\u5242\uff08\u975e\u666e\u901aIPA\uff09\u5355\u6b21\u64e6\u62ed\uff0c\u7136\u540e\u7acb\u5373\u4f7f\u7528\u65e0\u7ed2\u64e6\u62ed\u5e03\u5355\u6b21\u5e72\u64e6\u3002\u5207\u52ff\u8fde\u7eed\u8fdb\u884c\u4e24\u6b21\u6e7f\u64e6\u3002<\/p>\n<\/li>\n<li>\n<p>\u8fdb\u884c\u6700\u7ec8\u68c0\u67e5\u3002\u5982\u679c\u901a\u8fc7\uff0c\u5219\u8fde\u63a5\u5668\u53ef\u4ee5\u8fdb\u884c\u914d\u5408\u3002<\/p>\n<\/li>\n<\/ol>\n<blockquote>\n<p>\u4e3a\u4ec0\u4e48\u666e\u901aIPA\u4e0d\u9002\u7528\uff1a\u666e\u901a\u5f02\u4e19\u9187\uff08IPA\uff09\u5177\u6709\u5438\u6e7f\u6027\uff0c\u84b8\u53d1\u7f13\u6162\uff0c\u5e76\u4e14\u7ecf\u5e38\u7559\u4e0b\u6bd4\u539f\u59cb\u6c61\u67d3\u7269\u66f4\u96be\u53bb\u9664\u7684\u6b8b\u7559\u7269\u3002\u5bf9\u4e8e\u8f7b\u5fae\u6c61\u67d3\uff0c\u5e94\u4f7f\u7528\u5149\u7ea4\u7ea7\u6e05\u6d01\u6db2\u6216\u5b8c\u5168\u8df3\u8fc7\u6e7f\u6e05\u6d01\u3002<\/p>\n<\/blockquote>\n<p>\u6b63\u786e\u7684\u6e05\u6d01\u53ef\u6062\u590d\u6574\u4e2a\u96c6\u7fa4\u4e92\u8fde\u7ed3\u6784\u4e2d\u539f\u59cb\u7684\u5149\u4f20\u8f93\u901a\u9053\u3002\u5728\u5c06GPU\u4e3b\u673a\u91cd\u65b0\u6295\u5165\u751f\u4ea7\u7ba1\u9053\u4e4b\u524d\uff0c\u60a8\u53ef\u786e\u4fdd\u8fde\u63a5\u7684GPU\u63d2\u69fd\u77e9\u9635\u5177\u6709\u6700\u5927\u7a33\u5b9a\u6027\u3002<\/p>\n<h2>\u89e3\u51b3\u5bfc\u81f4NVLink\u5e26\u5bbd\u964d\u4f4e\u7684\u70ed\u5b66\u539f\u56e0<\/h2>\n<h3>\u4fee\u590d\u5c40\u90e8NVSwitch\u51b7\u5374\u6545\u969c<\/h3>\n<p>\u673a\u7bb1\u5185\u7684\u6781\u7aef\u9ad8\u6e29\u4f1a\u5bfc\u81f4\u9759\u9ed8\u7684\u786c\u4ef6\u964d\u901f\u3002NVSwitch\u82af\u7247\u4e0a\u7684\u5c40\u90e8\u51b7\u5374\u6545\u969c\u4f1a\u8fc5\u901f\u7834\u574f\u9ad8\u901f\u4e92\u8fde\u7684\u7a33\u5b9a\u6027\u3002\u5f53\u5185\u90e8\u6563\u70ed\u5668\u79fb\u4f4d\u6216\u98ce\u6247\u6545\u969c\u65f6\uff0c\u76ee\u6807\u8bbe\u5907\u4f1a\u7ecf\u5386\u5feb\u901f\u7684\u70ed\u81a8\u80c0\u3002\u8fd9\u79cd\u70ed\u91cf\u4f1a\u89e6\u53d1\u4fdd\u62a4\u6027\u56fa\u4ef6\u964d\u4f4e\u94fe\u8def\u541e\u5410\u91cf\uff0c\u4ece\u800c\u5728\u6574\u4e2aGPU\u670d\u52a1\u5668\u8282\u70b9\u4e0a\u5bfc\u81f4\u4e25\u91cd\u7684NVLink\u901f\u5ea6\u964d\u7ea7\u3002<\/p>\n<p>\u60a8\u53ef\u4ee5\u901a\u8fc7\u68c0\u67e5GPU\u7cfb\u7edf\u4e8b\u4ef6\u65e5\u5fd7\u6765\u8bc6\u522b\u8fd9\u4e9b\u786c\u4ef6\u8fc7\u70ed\u72b6\u6001\u3002\u7279\u5b9a\u7684\u70ed\u8b66\u544a\u4ee3\u7801\u6307\u793a\u51b7\u5374\u4e0d\u8db3\u4f55\u65f6\u8feb\u4f7f\u4ea4\u6362\u673a\u8fdb\u5165\u8f83\u4f4e\u5de5\u4f5c\u72b6\u6001\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>\u9519\u8bef\u4ee3\u7801<\/p>\n<\/th>\n<th colspan=\"1\" rowspan=\"1\">\n<p>\u4e8b\u4ef6\u540d\u79f0<\/p>\n<\/th>\n<th colspan=\"1\" rowspan=\"1\">\n<p>\u63cf\u8ff0\u53ca\u5bf9\u6027\u80fd\u7684\u5f71\u54cd<\/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\u7edf\u51b7\u5374\u4e0d\u8db3\u3002\u6b64\u4e8b\u4ef6\u53ef\u8feb\u4f7f\u53d7\u5f71\u54cd\u7684NVSwitch\u94fe\u8def\u8fdb\u5165\u8f83\u4f4e\u529f\u8017\u7684\u5355\u901a\u9053\u6a21\u5f0f\uff0c\u4ece\u800c\u964d\u4f4eNVLink\u541e\u5410\u91cf\u548c\u6574\u4f53\u5e26\u5bbd\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>\u786e\u8ba4\u7cfb\u7edf\u56e0\u6f5c\u5728\u7684\u51b7\u5374\u95ee\u9898\u800c\u7ecf\u5386\u4e86\u70ed\u4e8b\u4ef6\uff0c\u8be5\u4e8b\u4ef6\u66fe\u5f71\u54cd\u94fe\u8def\u6027\u80fd\u3002<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p>\u5f53\u4e8b\u4ef610004\u51fa\u73b0\u65f6\uff0c\u60a8\u5fc5\u987b\u7acb\u5373\u68c0\u67e5\u5bfc\u70ed\u754c\u9762\u6750\u6599\u3002\u66f4\u6362\u5e72\u6db8\u7684\u5bfc\u70ed\u818f\u53ef\u6062\u590d\u57fa\u677f\u4e0a\u7684\u76f4\u63a5\u70ed\u6269\u6563\u3002\u786e\u4fdd\u5e73\u8861\u7684\u6c14\u6d41\u53ef\u7a33\u5b9a\u7ed3\u6784\u6e29\u5ea6\u5e76\u9632\u6b62\u94fe\u8def\u964d\u5165\u5355\u901a\u9053\u6a21\u5f0f\u3002<\/p>\n<h3>\u7ba1\u7406\u70ed\u8282\u6d41\u548c\u52a8\u6001\u529f\u7387\u9650\u5236<\/h3>\n<blockquote>\n<p>\u70ed\u8282\u6d41\u662f\u6307GPU\uff08\u6216CPU\uff09\u5728\u8fbe\u5230\u9884\u5b9a\u4e49\u6e29\u5ea6\u9650\u5236\u65f6\uff0c\u81ea\u52a8\u964d\u4f4e\u65f6\u949f\u9891\u7387\u548c\u7535\u538b\u4ee5\u9632\u6b62\u8fc7\u70ed\u3002<\/p>\n<\/blockquote>\n<p>\u60a8\u5fc5\u987b\u5b9e\u65f6\u8ddf\u8e2a\u6bcf\u4e2aGPU\u52a0\u901f\u5668\u7684\u6e29\u5ea6\uff0c\u4ee5\u9632\u6b62\u94fe\u8def\u74f6\u9888\u3002\u8fc7\u9ad8\u7684\u70ed\u91cf\u4f1a\u5f3a\u5236\u5904\u7406\u5668\u964d\u9891\uff0c\u4ece\u800c\u505c\u6ede\u6574\u4e2a\u7ed3\u6784\u4e2d\u7684\u901a\u4fe1\u3002\u5728\u6bcf\u4e2aGPU\u4e0a\u8fd0\u884c\u8bca\u65ad\u67e5\u8be2\u53ef\u63ed\u793a\u6bcf\u4e2a\u53d7\u5f71\u54cd\u5904\u7406\u5668\u7684\u786e\u5207\u964d\u901f\u72b6\u6001\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\u547d\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>\u4e0e\u67e5\u8be2\u7684\u76f4\u63a5\u76f8\u5173\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>\u663e\u793a\u9884\u8bbe\u7684\u70ed\u964d\u901f\/\u5173\u673a\u9608\u503c\uff0c\u5e76\u62a5\u544a\u5f53\u524d\u70ed\u8282\u6d41\u72b6\u6001\u3002<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u76f4\u63a5\u76d1\u63a7\u70ed\u8282\u6d41\u72b6\u6001\u5e76\u663e\u793a\u9884\u8bbe\u9608\u503c\uff0c\u8fd9\u662f\u4efb\u4f55\u8c03\u6574\u7684\u57fa\u7840\u3002<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u7ed3\u5408<code>gpu-burn<\/code>\u4e0e<code>nvidia-smi<\/code>\u4f7f\u7528<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u5bf9GPU\u5355\u5143\u8fdb\u884c\u538b\u529b\u6d4b\u8bd5\u5e76\u76d1\u63a7\u662f\u5426\u53d1\u751f\u70ed\u8282\u6d41\u3002<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u63d0\u4f9b\u4e00\u79cd\u65b9\u6cd5\uff0c\u901a\u8fc7\u5b9e\u9a8c\u9a8c\u8bc1\u5f53\u524d\u70ed\u9608\u503c\u5728\u8d1f\u8f7d\u4e0b\u662f\u5426\u4f1a\u89e6\u53d1\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>\u6765\u9650\u5236\u529f\u7387\u6d88\u8017\u3002\u964d\u4f4eGPU\u529f\u8017\u53ef\u76f4\u63a5\u51cf\u5c11\u70ed\u91cf\u4ea7\u751f\u3002\u8fd9\u79cd\u529f\u7387\u8c03\u6574\u53ef\u4fdd\u6301\u7a33\u5b9a\u7684\u6e29\u5ea6\uff0c\u5e76\u5728\u7e41\u91cd\u5de5\u4f5c\u8d1f\u8f7d\u4e0b\u4fdd\u62a4\u6bcf\u4e2aGPU\u63d2\u69fd\u7684\u603bNVLink\u5e26\u5bbd\u3002\u5728\u5f00\u59cb\u751f\u4ea7\u8fd0\u884c\u4e4b\u524d\uff0c\u4f7f\u7528GPU\u5de5\u4f5c\u8d1f\u8f7d\u5bf9\u7cfb\u7edf\u8fdb\u884c\u538b\u529b\u6d4b\u8bd5\uff0c\u4ee5\u9a8c\u8bc1\u60a8\u7684\u70ed\u4fee\u590d\u63aa\u65bd\u3002<\/p>\n<h2>\u9a8c\u8bc1NVLink\u5e26\u5bbd\u6062\u590d<\/h2>\n<h3>\u4f7f\u7528NCCL\u6d4b\u8bd5\u5bf9\u4e92\u8fde\u8fdb\u884c\u538b\u529b\u6d4b\u8bd5<\/h3>\n<p>\u60a8\u5fc5\u987b\u8fd0\u884c\u6807\u51c6\u5316\u57fa\u51c6\u6d4b\u8bd5\u5957\u4ef6\uff0c\u4ee5\u9a8c\u8bc1\u6574\u4e2a\u7ed3\u6784\u4e2d\u7684\u7269\u7406\u786c\u4ef6\u4fee\u590d\u3002\u4ece\u5b98\u65b9<code>nccl-tests<\/code>\u4ed3\u5e93\u7f16\u8bd1\u4e8c\u8fdb\u5236\u6587\u4ef6\uff0c\u4f7f\u60a8\u80fd\u591f\u8de8\u6240\u6709\u7cfb\u7edf\u63d2\u69fd\u6267\u884c<code>all_reduce_perf<\/code>\u5de5\u5177\u3002\u60a8\u53ef\u4ee5\u4f7f\u7528<code>mpirun<\/code>\u6807\u5fd7\u542f\u52a8\u53ef\u6269\u5c55\u7684\u538b\u529b\u6d4b\u8bd5\uff0c\u4ee5\u8bc4\u4f30\u9ad8\u6570\u636e\u8d1f\u8f7d\u4e0b\u7684\u901a\u4fe1\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>\u8bbe\u7f6e\u7279\u5b9a\u7684\u547d\u4ee4\u53c2\u6570\u53ef\u5c06\u6570\u636e\u4f20\u8f93\u63a8\u81f3\u6700\u5927\u5bb9\u91cf\u3002\u8d77\u59cb\u7f13\u51b2\u533a<code>-b 3G<\/code>\u548c\u7ed3\u675f\u7f13\u51b2\u533a<code>-e 24G<\/code>\u6807\u5fd7\u7528\u4e8e\u6d4b\u8bd5\u4e0d\u540c\u6709\u6548\u8d1f\u8f7d\u5927\u5c0f\u4e0b\u7684\u7f51\u7edc\u6269\u5c55\u80fd\u529b\u3002<code>-g 8<\/code>\u6807\u5fd7\u6307\u5b9a\u5728\u5355\u53f0\u4e3b\u673a\u76848\u4e2aGPU\u8bbe\u5907\u4e0a\u8fdb\u884c\u6d4b\u8bd5\u3002\u60a8\u53ef\u4ee5\u914d\u7f6e\u73af\u5883\u53d8\u91cf\uff0c\u5982<code>NCCL_MIN_CTAS<\/code>\u548c<code>NCCL_MAX_CTAS<\/code>\uff0c\u4ee5\u5728\u6027\u80fd\u6d4b\u8bd5\u671f\u95f4\u5f3a\u5236\u7279\u5b9a\u7684\u901a\u9053\u5206\u914d\u3002\u5c06<code>NCCL_NVLS_ENABLE<\/code>\u8bbe\u7f6e\u4e3a<code>2<\/code>\u53ef\u5728\u73b0\u4ee3\u7cfb\u7edf\u4e0a\u542f\u7528\u786c\u4ef6\u5378\u8f7d\u3002\u6210\u529f\u6d4b\u8bd5\u53ef\u786e\u8ba4NVLink 3.0\u5e73\u53f0\u8fbe\u5230\u6bcf\u4e2aGPU\u63d2\u69fd600 GB\/s\u7684\u53cc\u5411\u541e\u5410\u91cf\uff0c\u800cNVLink 4.0\u914d\u7f6e\u5219\u5b9e\u73b0\u6bcf\u4e2aGPU\u5355\u5143900 GB\/s\u7684\u603b\u53cc\u5411\u5e26\u5bbd\u3002<\/p>\n<h3>\u6267\u884c\u4fee\u590d\u540e\u7684\u786c\u4ef6\u68c0\u67e5\u6e05\u5355<\/h3>\n<p>\u5728\u5c06GPU\u670d\u52a1\u5668\u4e3b\u673a\u91cd\u65b0\u6295\u5165\u751f\u4ea7\u7ba1\u9053\u4e4b\u524d\uff0c\u60a8\u9700\u8981\u6267\u884c\u7cfb\u7edf\u7684\u9a8c\u8bc1\u5e8f\u5217\u3002<\/p>\n<ol>\n<li>\n<p>\u8fd0\u884c<code>nvidia-smi<\/code>\u67e5\u770bGPU\u5bf9\u7b49\u8fde\u63a5\u77e9\u9635\uff0c\u5e76\u786e\u8ba4\u6bcf\u4e2aGPU\u6a21\u5757\u4e0a\u7684\u6d3b\u52a8\u94fe\u8def\u72b6\u6001\u3002<\/p>\n<\/li>\n<li>\n<p>\u6267\u884c<code>nvidia-smi topo -m<\/code>\u68c0\u67e5GPU\u62d3\u6251\u8868\uff0c\u5e76\u786e\u8ba4\u76f4\u63a5\u7ed3\u6784\u8def\u5f84\u3002<\/p>\n<\/li>\n<li>\n<p>\u8fd0\u884c<code>nvidia-smi nvlink --status<\/code>\u68c0\u67e5\u6bcf\u4e2a\u7269\u7406GPU\u63d2\u69fd\u4e0a\u7684\u5404\u94fe\u8def\u901f\u5ea6\u5e76\u9a8c\u8bc1\u6d3b\u52a8\u72b6\u6001\u3002<\/p>\n<\/li>\n<li>\n<p>\u6267\u884cCUDA <code>deviceQuery<\/code>\u793a\u4f8b\u7a0b\u5e8f\uff0c\u4ee5\u9a8c\u8bc1\u8f6f\u4ef6\u5c42\u80fd\u8bc6\u522b\u5b8c\u5168\u6062\u590d\u7684\u786c\u4ef6\u5806\u6808\u3002<\/p>\n<\/li>\n<\/ol>\n<p>\u7cfb\u7edf\u5316\u68c0\u67e5\u53ef\u786e\u4fdd\u96c6\u7fa4\u4e2d\u6bcf\u4e2a\u5df2\u5b89\u88c5\u52a0\u901f\u5668\u7684\u957f\u671f\u7a33\u5b9a\u6027\u3002\u9a8c\u8bc1\u7269\u7406\u94fe\u8def\u72b6\u6001\u53ef\u9632\u6b62\u5728\u7e41\u91cd\u8bad\u7ec3\u5de5\u4f5c\u8d1f\u8f7d\u671f\u95f4\u51fa\u73b0\u901f\u5ea6\u4e0b\u964d\u3002\u5728\u8fd0\u884c\u5927\u578b\u6a21\u578b\u8bad\u7ec3\u4f5c\u4e1a\u4e4b\u524d\uff0c\u60a8\u9700\u786e\u8ba4\u6bcf\u4e2aGPU\u5230GPU\u4e92\u8fde\u8def\u5f84\u7684\u5b8c\u6574\u7269\u7406\u5065\u5eb7\u72b6\u6001\u3002\u5b8c\u6210\u8fd9\u4e9b\u9a8c\u8bc1\u6b65\u9aa4\u53ef\u4fdd\u8bc1\u6700\u4f73\u7684NVLink\u5e26\u5bbd\uff0c\u5e76\u4f7f\u8282\u70b9\u6062\u590d\u751f\u4ea7\u8fd0\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\u901a\u8fc7\u9075\u5faa\u4e25\u683c\u7684\u5de5\u4f5c\u6d41\u7a0b\u6765\u89e3\u51b3NVLink\u901f\u5ea6\u964d\u7ea7\u95ee\u9898\u3002\u9996\u5148\uff0c\u8fd0\u884c<code>nvidia-smi topo -m<\/code>\u4ee5\u8bc6\u522b\u635f\u574f\u7684\u8def\u5f84\u3002\u63a5\u4e0b\u6765\uff0c\u5173\u95ed\u7cfb\u7edf\u4ee5\u91cd\u65b0\u5b89\u88c5\u6a21\u5757\u5e76\u6e05\u6d01\u94dc\u8d28\u89e6\u70b9\u3002\u4e3b\u52a8\u76d1\u63a7\u8bef\u7801\u7387\u53ef\u9632\u6b62\u5927\u578bAI\u96c6\u7fa4\u8282\u70b9\u4e2d\u51fa\u73b0\u9759\u9ed8\u74f6\u9888\u3002\u7cfb\u7edf\u7ba1\u7406\u5458\u8ddf\u8e2a\u8bf8\u5982<code>DCGM_FI_DEV_NVLINK_BANDWIDTH_TOTAL<\/code>\u7b49\u6307\u6807\u4ee5\u5c3d\u65e9\u6355\u83b7\u6545\u969c\u3002\u60a8\u8fd8\u987b\u7559\u610fXID 145\u548cXID 149\u7b49\u786c\u4ef6\u8b66\u62a5\u3002\u6700\u540e\uff0c\u4f7f\u7528NCCL\u5de5\u5177\u6267\u884c\u538b\u529b\u6d4b\u8bd5\u3002\u5728\u5c06GPU\u8282\u70b9\u91cd\u65b0\u6295\u5165\u751f\u4ea7\u4e4b\u524d\uff0c\u8fd9\u4e9b\u6d4b\u8bd5\u53ef\u9a8c\u8bc1\u5b8c\u6574\u7684NVLink\u5e26\u5bbd\u6062\u590d\u60c5\u51b5\u3002<\/p>\n<h2>\u5e38\u89c1\u95ee\u9898\u89e3\u7b54<\/h2>\n<h3>\u5982\u4f55\u8bc6\u522bGPU\u670d\u52a1\u5668\u4e0a\u964d\u7ea7\u7684NVLink\u8fde\u63a5\uff1f<\/h3>\n<p>\u5728GPU\u4e3b\u673a\u4e0a\u8fd0\u884c<code>nvidia-smi topo -m<\/code>\u3002\u77e9\u9635\u4f1a\u663e\u793a<code>PIX<\/code>\u6216<code>SYS<\/code>\u4ee3\u7801\uff0c\u800c\u975e\u6d3b\u52a8\u7684<code>NV<\/code>\u8def\u7531\u3002\u6b64\u72b6\u6001\u8868\u660e\u94fe\u8def\u6545\u969c\uff0c\u8feb\u4f7f\u60a8\u7684GPU\u6d41\u91cf\u8d70\u6162\u901fPCIe\u8def\u5f84\u3002\u60a8\u5fc5\u987b\u6d4b\u8bd5\u6bcf\u4e2aGPU\u63d2\u69fd\u4ee5\u5b9a\u4f4d\u635f\u574f\u7684\u8def\u5f84\u3002<\/p>\n<h3>\u4e3a\u4ec0\u4e48\u7269\u7406GPU\u4e92\u8fde\u964d\u7ea7\u4f1a\u89e6\u53d1PCIe\u56de\u9000\uff1f<\/h3>\n<p>\u7269\u7406\u4fe1\u53f7\u5b8c\u6574\u6027\u95ee\u9898\u4f1a\u89e6\u53d1\u81ea\u52a8\u94fe\u8def\u91cd\u8bd5\u3002\u6301\u7eed\u7684\u9519\u8bef\u4f1a\u8feb\u4f7f\u7cfb\u7edf\u5c06\u4e92\u8fde\u901f\u5ea6\u964d\u81f3PCIe Gen4\u5e26\u5bbd\uff0864 GB\/s\uff09\u3002\u8fd9\u79cd\u786c\u4ef6\u56de\u9000\u53ef\u9632\u6b62GPU\u5b8c\u5168\u5d29\u6e83\uff0c\u4f46\u4e25\u91cd\u9650\u5236\u6bcf\u4e2a\u5df2\u8fde\u63a5GPU\u8282\u70b9\u4e4b\u95f4\u7684\u901a\u4fe1\u6027\u80fd\u3002<\/p>\n<h3>\u54ea\u4e9bDCGM\u6307\u6807\u9884\u793a\u5373\u5c06\u53d1\u751f\u7684GPU\u786c\u4ef6\u6545\u969c\uff1f<\/h3>\n<p>\u60a8\u5e94\u76d1\u63a7<code>dcgmi nvlink --errors<\/code>\u4e2d\u4e0d\u65ad\u4e0a\u5347\u7684CRC\u6570\u636e\u9519\u8bef\u548c\u6062\u590d\u4e8b\u4ef6\u3002\u6bcf\u79d2\u8d85\u8fc7100\u4e2aCRC\u9519\u8bef\u4f1a\u7acb\u5373\u89e6\u53d1\u7cfb\u7edf\u8b66\u62a5\u3002\u5728GPU\u6a21\u5757\u6216GPU\u57fa\u677f\u63d2\u69fd\u5b8c\u5168\u94fe\u8def\u4e2d\u65ad\u4e4b\u524d\uff0c\u9ad8\u9519\u8bef\u7387\u5373\u6307\u793a\u7269\u7406\u8fde\u63a5\u5668\u635f\u574f\u3002<\/p>\n<h3>\u70ed\u8282\u6d41\u5982\u4f55\u5f71\u54cd\u6574\u4f53GPU\u96c6\u7fa4\u541e\u5410\u91cf\uff1f<\/h3>\n<p>\u9ad8\u5de5\u4f5c\u6e29\u5ea6\u4f1a\u5f3a\u5236\u4fdd\u62a4\u6027\u7cfb\u7edf\u56fa\u4ef6\u964d\u4f4eGPU\u65f6\u949f\u9891\u7387\u3002\u70ed\u5e94\u529b\u4f1a\u5bfc\u81f4NVSwitch\u82af\u7247\u8fdb\u5165\u4f4e\u529f\u8017\u6a21\u5f0f\u3002\u8fd9\u79cd\u70ed\u964d\u901f\u4f1a\u964d\u4f4e\u6bcf\u4e2a\u5df2\u5b89\u88c5GPU\u8bbe\u5907\u7684\u6570\u636e\u4f20\u8f93\u901f\u5ea6\uff0c\u4ece\u800c\u5728\u6574\u4e2aGPU\u8282\u70b9\u7ec4\u4ef6\u4e2d\u5f62\u6210\u5de8\u5927\u7684\u6027\u80fd\u74f6\u9888\u3002<\/p>\n<h3>\u786c\u4ef6\u4fee\u590d\u540e\uff0c\u54ea\u4e2a\u57fa\u51c6\u6d4b\u8bd5\u53ef\u786e\u8ba4GPU\u5e26\u5bbd\u5b8c\u5168\u6062\u590d\uff1f<\/h3>\n<p>\u60a8\u53ef\u4ee5\u8de8\u6240\u6709\u76ee\u6807rank\u8fd0\u884cNCCL <code>all_reduce_perf<\/code>\u6d4b\u8bd5\u3002\u8be5\u57fa\u51c6\u6d4b\u8bd5\u4f1a\u63a8\u52a8\u6709\u6548\u8d1f\u8f7d\u4f20\u8f93\u7ecf\u8fc7\u6bcf\u4e2aGPU\u63d2\u69fd\u3002\u8fbe\u5230\u9884\u671f\u901f\u5ea6\uff08\u4f8b\u5982\u73b0\u4ee3\u7cfb\u7edf\u4e0a\u7684900 GB\/s\uff09\u53ef\u786e\u8ba4GPU\u7ed3\u6784\u5df2\u5b8c\u5168\u4fee\u590d\uff0c\u4e4b\u540e\u60a8\u53ef\u5c06GPU\u670d\u52a1\u5668\u91cd\u65b0\u6295\u5165\u751f\u4ea7\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u60a8\u901a\u8fc7\u7cfb\u7edf\u9065\u6d4b\u5de5\u5177\u68c0\u6d4b\u5230\u9ad8\u5bc6\u5ea6\u8282\u70b9\u4e2d\u7684\u7269\u7406NVLink\u901f\u5ea6\u964d\u7ea7\u3002\u9759\u9ed8\u7684\u786c\u4ef6\u6545\u969c\u4f7f\u60a8\u7684GPU\u8282\u70b9\u4fdd\u6301\u6d3b\u52a8\u72b6\u6001\uff0c\u4f46\u8fd9\u4e9b\u9690\u85cf\u9519\u8bef\u4f1a\u6084\u7136\u524a\u5f31\u5206\u5e03\u5f0f\u6a21\u578b\u8bad\u7ec3\u6027\u80fd\u3002\u5f53\u94fe\u8def\u964d\u7ea7\u8feb\u4f7f\u4e92\u8fde\u964d\u81f3PCIe Gen4\u901f\u5ea6\u800c\u975e\u539f\u751f\u5e26\u5bbd\u65f6\uff0c\u901a\u4fe1\u74f6\u9888\u4f1a\u62d6\u6162\u5927\u578b\u53c2\u6570GPU\u6a21\u578b\u7684\u8bad\u7ec3\u3002\u5355\u4e2aGPU\u4e92\u8fde\u6545\u969c\u4f1a\u5728\u91cd\u8d1f\u8f7d\u4e0b\u964d\u4f4e\u6574\u4e2a\u96c6\u7fa4\u7684\u6548\u7387\u3002\u60a8\u7684\u9996\u8981\u8fd0\u7ef4\u76ee\u6807\u662f\u5feb\u901f\u9694\u79bb\u7269\u7406\u786c\u4ef6\u7f3a\u9677\uff0c\u5fc5\u987b\u6062\u590d\u5b8c\u6574\u7684\u4e92\u8fde\u541e\u5410\u91cf\uff0c\u5e76\u9a8c\u8bc1\u670d\u52a1\u5668\u4e2d\u6bcf\u4e2aGPU\u63d2\u69fd\u7684\u7269\u7406\u4fe1\u53f7\u5b8c\u6574\u6027\u3002 \u901a\u8fc7\u8f6f\u4ef6\u8bca\u65adNVLink\u901f\u5ea6\u964d\u7ea7 \u5728\u8bca\u65adGPU\u96c6\u7fa4\u4e2d\u7684NVLink\u901f\u5ea6\u964d\u7ea7\u65f6\uff0c\u8f6f\u4ef6\u5de5\u5177\u53ef\u63d0\u4f9b\u5bf9\u7269\u7406\u4e92\u8fde\u5065\u5eb7\u72b6\u51b5\u7684\u5373\u65f6\u53ef\u89c1\u6027\u3002\u60a8\u53ef\u4ee5\u5728\u786c\u4ef6\u6545\u969c\u4e2d\u65ad\u8bad\u7ec3\u8fd0\u884c\u4e4b\u524d\u8bc6\u522b\u5e26\u5bbd\u74f6\u9888\u3002\u65e9\u671f\u8f6f\u4ef6\u68c0\u6d4b\u53ef\u9632\u6b62\u9690\u85cf\u9519\u8bef\u524a\u5f31\u6574\u4f53\u8282\u70b9\u6027\u80fd\u3002\u7cfb\u7edf\u76d1\u63a7\u5de5\u5177\u53ef\u9694\u79bb\u590d\u6742\u4e92\u8fde\u62d3\u6251\u4e2d\u7684\u7269\u7406\u4fe1\u53f7\u4e22\u5931\u3002 \u4f7f\u7528nvidia-smi\u68c0\u6d4b\u62d3\u6251\u6545\u969c \u60a8\u5fc5\u987b\u4f7f\u7528\u6807\u51c6\u7cfb\u7edf\u7ba1\u7406\u5de5\u5177\u9a8c\u8bc1\u7269\u7406\u94fe\u8def\u8fde\u63a5\u3002\u8fd0\u884cnvidia-smi topo 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AllReduce\u64cd\u4f5c\u671f\u95f4\u4ea7\u751f\u5de8\u5927\u7684\u901a\u4fe1\u5f00\u9500\u3002\u60a8\u53ef\u4ee5\u4f7f\u7528\u7279\u5b9a\u7684\u67e5\u8be2\u5de5\u5177\u6765\u9a8c\u8bc1\u5f53\u524d\u6d3b\u52a8\u901f\u5ea6\u3002 \u68c0\u67e5\u7c7b\u578b \u547d\u4ee4\u793a\u4f8b \u9884\u671f\u8f93\u51fa\uff08\u529f\u80fd\u5b8c\u5168\u6b63\u5e38\uff09 \u9884\u671f\u8f93\u51fa\uff08\u964d\u7ea7\/\u975e\u529f\u80fd\uff09 NVLink\u72b6\u6001\u4e0e\u901f\u5ea6 nvidia-smi nvlink -s \u8f93\u51fa\u5217\u51fa\u6d3b\u52a8\u901f\u5ea6\uff0c\u598225.781250GB\/s\u3002 \u8f93\u51fa\u663e\u793a\u6240\u6709\u94fe\u8def\u5747\u4e3a\u975e\u6d3b\u52a8\u72b6\u6001\u3002 GPU\u62d3\u6251\u77e9\u9635 nvidia-smi topo -m \u77e9\u9635\u5355\u5143\u683c\u663e\u793aNV\u524d\u7f00\uff0c\u5982NV4\u3002 \u77e9\u9635\u5355\u5143\u683c\u663e\u793aSYS\u6216PHB\u3002 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