{"id":4315,"date":"2020-05-18T10:50:24","date_gmt":"2020-05-18T02:50:24","guid":{"rendered":"https:\/\/damogame.cn\/wordpress\/?p=4315"},"modified":"2020-05-18T10:50:24","modified_gmt":"2020-05-18T02:50:24","slug":"%e5%8a%bf%e4%b8%8d%e5%8f%af%e6%8c%a1%e7%9a%84-rdma","status":"publish","type":"post","link":"https:\/\/i007.cc\/wordpress\/archives\/4315","title":{"rendered":"\u52bf\u4e0d\u53ef\u6321\u7684 RDMA"},"content":{"rendered":"<p><a href=\"https:\/\/baijiahao.baidu.com\/s?id=1656261093437759775&amp;wfr=spider&amp;for=pc\">\u539f\u6587\u5730\u5740<\/a><\/p>\n<p>&nbsp;<\/p>\n<p>\u5982\u4eca\uff0c\u670d\u52a1\u5668\u7684\u7f51\u7edc\u5e26\u5bbd\u8d8a\u6765\u8d8a\u9ad8\u3002\u5f53\u7f51\u7edc\u5e26\u5bbd\u8fc8\u8fc7\u4e07\u5146\u8fd9\u6761\u7ebf\u540e\uff0c\u64cd\u4f5c\u7cfb\u7edf\u7528\u4e8e\u5904\u7406\u7f51\u7edcIO\u7684\u5f00\u9500\u5c31\u8d8a\u6765\u8d8a\u96be\u4ee5\u5ffd\u89c6\u3002\u5728\u4e00\u4e9b\u7f51\u7edcIO\u5bc6\u96c6\u7684\u4e1a\u52a1\u4e2d\uff0c\u64cd\u4f5c\u7cfb\u7edf\u672c\u8eab\u6210\u4e3a\u4e86\u7f51\u7edc\u901a\u4fe1\u7684\u74f6\u9888\uff0c\u8fd9\u4e0d\u4ec5\u4f1a\u5bfc\u81f4\u8c03\u7528\u65f6\u5ef6\u7684\u589e\u52a0\uff08\u5c24\u5176\u662f\u957f\u5c3e\uff09\uff0c\u8fd8\u4f1a\u5f71\u54cd\u5230\u670d\u52a1\u7684\u6574\u4f53\u541e\u5410\u3002<\/p>\n<p>\u76f8\u5bf9\u4e8e\u7f51\u7edc\u5e26\u5bbd\u7684\u53d1\u5c55\u901f\u5ea6\uff0cCPU\u6027\u80fd\u7684\u53d1\u5c55\u505c\u6ede\u662f\u5bfc\u81f4\u4e0a\u8ff0\u95ee\u9898\u7684\u4e3b\u8981\u539f\u56e0\u3002<span class=\"bjh-strong\">\u56e0\u6b64\uff0c\u60f3\u4ece\u6839\u672c\u4e0a\u89e3\u51b3CPU\u53c2\u4e0e\u7f51\u7edc\u4f20\u8f93\u7684\u4f4e\u6548\u95ee\u9898\uff0c\u5c31\u8981\u66f4\u591a\u5730\u501f\u52a9\u4e13\u7528\u82af\u7247\u7684\u80fd\u529b\uff0cRDMA\u9ad8\u6027\u80fd\u7f51\u7edc\u52bf\u4e0d\u53ef\u6321\u3002<\/span><\/p>\n<p>RDMA\uff08Remote Direct Memory Access\uff09\uff0c\u53ef\u4ee5\u7b80\u5355\u7406\u89e3\u4e3a\u7f51\u5361\u5b8c\u5168\u7ed5\u8fc7CPU\u5b9e\u73b0\u4e24\u4e2a\u670d\u52a1\u5668\u4e4b\u95f4\u7684\u5185\u5b58\u6570\u636e\u4ea4\u6362\u3002\u5176\u4f5c\u4e3a\u4e00\u79cd\u786c\u4ef6\u5b9e\u73b0\u7684\u7f51\u7edc\u4f20\u8f93\u6280\u672f\uff0c\u53ef\u4ee5\u5927\u5e45\u63d0\u5347\u7f51\u7edc\u4f20\u8f93\u6548\u7387\uff0c\u5e2e\u52a9\u7f51\u7edcIO\u5bc6\u96c6\u7684\u4e1a\u52a1\uff08\u6bd4\u5982\u5206\u5e03\u5f0f\u5b58\u50a8\u3001\u5206\u5e03\u5f0f\u6570\u636e\u5e93\u7b49\uff09\u83b7\u5f97\u66f4\u4f4e\u7684\u65f6\u5ef6\u4ee5\u53ca\u66f4\u9ad8\u7684\u541e\u5410\u3002<\/p>\n<p>\u5177\u4f53\u6765\u8bf4\uff0cRDMA\u6280\u672f\u7684\u5e94\u7528\u8981\u501f\u52a9\u652f\u6301RDMA\u529f\u80fd\u7684\u7f51\u5361\u4ee5\u53ca\u76f8\u5e94\u7684\u9a71\u52a8\u7a0b\u5e8f\u3002\u7531\u4e0b\u56fe\u6240\u793a\uff0c\u4e00\u65e6\u5e94\u7528\u7a0b\u5e8f\u5206\u914d\u597d\u8d44\u6e90\uff0c\u5176\u53ef\u4ee5\u76f4\u63a5\u628a\u8981\u53d1\u9001\u7684\u6570\u636e\u6240\u5728\u7684\u5185\u5b58\u5730\u5740\u548c\u957f\u5ea6\u4fe1\u606f\u4ea4\u7ed9\u7f51\u5361\u3002\u7f51\u5361\u4ece\u5185\u5b58\u4e2d\u62c9\u53d6\u6570\u636e\uff0c\u7531\u786c\u4ef6\u5b8c\u6210\u62a5\u6587\u5c01\u88c5\uff0c\u7136\u540e\u53d1\u9001\u7ed9\u5bf9\u5e94\u7684\u63a5\u6536\u7aef\u3002\u63a5\u6536\u7aef\u6536\u5230RDMA\u62a5\u6587\u540e\uff0c\u76f4\u63a5\u7531\u786c\u4ef6\u89e3\u5c01\u88c5\uff0c\u53d6\u51fa\u6570\u636e\u540e\uff0c\u76f4\u63a5\u653e\u5728\u5e94\u7528\u7a0b\u5e8f\u9884\u5148\u6307\u5b9a\u7684\u5185\u5b58\u4f4d\u7f6e\u3002<\/p>\n<p><span class=\"bjh-strong\">\u7531\u4e8e\u6574\u4e2aIO\u8fc7\u7a0b\u65e0\u9700CPU\u53c2\u4e0e\uff0c\u65e0\u9700\u64cd\u4f5c\u7cfb\u7edf\u5185\u6838\u53c2\u4e0e\uff0c\u6ca1\u6709\u7cfb\u7edf\u8c03\u7528\uff0c\u6ca1\u6709\u4e2d\u65ad\uff0c\u4e5f\u65e0\u9700\u5185\u5b58\u62f7\u8d1d\uff0c\u56e0\u6b64RDMA\u7f51\u7edc\u4f20\u8f93\u53ef\u4ee5\u505a\u5230\u6781\u9ad8\u7684\u6027\u80fd\u3002<\/span>\u5728\u6781\u9650benchmark\u6d4b\u8bd5\u4e2d\uff0cRDMA\u7684\u65f6\u5ef6\u53ef\u4ee5\u505a\u52301us\u7ea7\u522b\uff0c\u800c\u541e\u5410\u751a\u81f3\u53ef\u4ee5\u8fbe\u5230200G\u3002<\/p>\n<div class=\"img-container\"><img decoding=\"async\" class=\"large\" src=\"https:\/\/pics6.baidu.com\/feed\/8326cffc1e178a8247d35a4029c9668bab77e8b0.jpeg?token=8718af9953eaf290862de1642339a500&amp;s=F203F20C05B1303A5413B80B0300F08B\" data-loadfunc=\"0\" data-loaded=\"0\" \/><\/div>\n<p>RDMA\u6280\u672f\u8bf4\u660e<\/p>\n<p><span class=\"bjh-strong\">\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c<\/span><span class=\"bjh-strong\">RDMA\u7684\u4f7f\u7528\u9700\u8981\u5e94\u7528\u7a0b\u5e8f\u7684\u4ee3\u7801\u914d\u5408\uff08RDMA\u7f16\u7a0b\uff09\u3002<\/span>\u4e0e\u4f20\u7edfTCP\u4f20\u8f93\u4e0d\u540c\uff0cRDMA\u5e76\u6ca1\u6709\u63d0\u4f9bsocket API\u5c01\u88c5\uff0c\u800c\u662f\u8981\u901a\u8fc7verbs API\u6765\u8c03\u7528\uff08\u4f7f\u7528libibverbs\uff09\u3002\u51fa\u4e8e\u907f\u514d\u4e2d\u95f4\u5c42\u989d\u5916\u5f00\u9500\u7684\u8003\u8651\uff0cverbs API\u91c7\u7528\u4e86\u8d34\u8fd1\u786c\u4ef6\u5b9e\u73b0\u7684\u8bed\u4e49\u5f62\u6001\uff0c\u5bfc\u81f4\u4f7f\u7528\u65b9\u6cd5\u4e0esocket API\u5dee\u5f02\u5de8\u5927\u3002<\/p>\n<p>\u56e0\u6b64\uff0c\u5bf9\u5927\u591a\u6570\u5f00\u53d1\u8005\u6765\u8bf4\uff0c\u65e0\u8bba\u662f\u6539\u9020\u539f\u6709\u5e94\u7528\u7a0b\u5e8f\u9002\u914dRDMA\uff0c\u8fd8\u662f\u5199\u4e00\u4e2a\u5168\u65b0\u7684RDMA\u539f\u751f\u7684\u5e94\u7528\u7a0b\u5e8f\uff0c\u90fd\u4e0d\u5bb9\u6613\u3002<\/p>\n<p>RDMA \u7f16\u7a0b\u96be\u5728\u54ea\u91cc\uff1f<\/p>\n<p>\u5982\u56fe\u6240\u793a\uff0c\u5728socket API\u4e2d\uff0c\u53d1\u9001\u63a5\u6536\u6570\u636e\u4e3b\u8981\u7528\u5230\u7684\u63a5\u53e3\u5982\u4e0b\uff1a<\/p>\n<div class=\"img-container\"><img decoding=\"async\" class=\"normal\" src=\"https:\/\/pics5.baidu.com\/feed\/810a19d8bc3eb135dcf44f487bd4bdd5fc1f4467.jpeg?token=32dd9a45c1c7bcf913cc8a0d16fd4e4a&amp;s=72B7A164C984BF705C4DD401030070CA\" width=\"447px\" data-loadfunc=\"0\" data-loaded=\"0\" \/><\/div>\n<p>Socket API<\/p>\n<p>\u5176\u4e2d\uff0cwrite\u548cread\u64cd\u4f5c\u4e2d\u7684fd\u662f\u6807\u8bc6\u4e00\u4e2a\u8fde\u63a5\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26\u3002\u5e94\u7528\u7a0b\u5e8f\u8981\u53d1\u9001\u7684\u6570\u636e\uff0c\u4f1a\u901a\u8fc7write\u62f7\u8d1d\u5230\u7cfb\u7edf\u5185\u6838\u7f13\u51b2\u533a\u4e2d\uff1b\u800cread\u5b9e\u9645\u4e0a\u4e5f\u662f\u4ece\u7cfb\u7edf\u5185\u6838\u7f13\u51b2\u533a\u4e2d\u5c06\u6570\u636e\u62f7\u8d1d\u51fa\u6765\u3002<\/p>\n<p>\u5728\u7edd\u5927\u591a\u6570\u5e94\u7528\u7a0b\u5e8f\u91cc\uff0c\u901a\u5e38\u90fd\u4f1a\u8bbe\u7f6efd\u4e3a\u975e\u963b\u585e\u7684\uff0c\u4e5f\u5c31\u662f\u8bf4\uff0c\u5982\u679c\u7cfb\u7edf\u5185\u6838\u7f13\u51b2\u533a\u5df2\u6ee1\uff0cwrite\u64cd\u4f5c\u4f1a\u76f4\u63a5\u8fd4\u56de\uff1b\u800c\u5982\u679c\u7cfb\u7edf\u5185\u6838\u7f13\u51b2\u533a\u4e3a\u7a7a\uff0cread\u64cd\u4f5c\u4e5f\u4f1a\u76f4\u63a5\u8fd4\u56de\u3002<\/p>\n<p>\u4e3a\u4e86\u5728\u7b2c\u4e00\u65f6\u95f4\u83b7\u77e5\u5185\u6838\u7f13\u51b2\u533a\u7684\u72b6\u6001\u53d8\u5316\uff0c\u5e94\u7528\u7a0b\u5e8f\u9700\u8981epoll\u673a\u5236\u6765\u76d1\u542cEPOLLIN\u548cEPOLLOUT\u4e8b\u4ef6\u3002\u5982\u679cepoll_wait\u51fd\u6570\u56e0\u8fd9\u4e9b\u4e8b\u4ef6\u8fd4\u56de\uff0c\u5219\u53ef\u4ee5\u89e6\u53d1\u4e0b\u4e00\u6b21\u7684write\u548cread\u64cd\u4f5c\u3002\u8fd9\u5c31\u662fsocket API\u7684\u57fa\u672c\u4f7f\u7528\u65b9\u6cd5\u3002<\/p>\n<p>\u4f5c\u4e3a\u5bf9\u6bd4\uff0c\u5728verbs API\u4e2d\uff0c\u53d1\u9001\u63a5\u6536\u6570\u636e\u4e3b\u8981\u7528\u5230\u7684\u63a5\u53e3\u5982\u4e0b\uff1a<\/p>\n<div class=\"img-container\"><img decoding=\"async\" class=\"normal\" src=\"https:\/\/pics2.baidu.com\/feed\/0e2442a7d933c895e0d568550ed966f683020041.jpeg?token=c629043f8279fcf9d6080f3103c39b75&amp;s=72972164DFF199D25E7D24120300508A\" width=\"433px\" data-loadfunc=\"0\" data-loaded=\"0\" \/><\/div>\n<p>Verbs API<\/p>\n<p>\u5176\u4e2d\uff0cibv_\u662flibibverbs\u5e93\u4e2d\u51fd\u6570\u548c\u7ed3\u6784\u4f53\u7684\u524d\u7f00\u3002ibv_post_send\u8fd1\u4f3c\u4e8e\u53d1\u9001\u64cd\u4f5c\uff0cibv_post_recv\u8fd1\u4f3c\u4e8e\u63a5\u6536\u64cd\u4f5c\u3002\u53d1\u9001\u63a5\u6536\u64cd\u4f5c\u91cc\u9762\u7684qp\uff08queue pair\uff09\u8fd1\u4f3c\u4e8esocket API\u91cc\u9762\u7684fd\uff0c\u4f5c\u4e3a\u4e00\u4e2a\u8fde\u63a5\u5bf9\u5e94\u7684\u6807\u8bc6\u3002wr\uff08work request\uff09\u8fd9\u4e2a\u7ed3\u6784\u4f53\u91cc\u5305\u542b\u4e86\u8981\u53d1\u9001\/\u63a5\u6536\u7684\u6570\u636e\u6240\u5728\u7684\u5185\u5b58\u5730\u5740\uff08\u8fdb\u7a0b\u7684\u865a\u62df\u5730\u5740\uff09\u548c\u957f\u5ea6\u3002ibv_poll_cq\u5219\u4f5c\u4e3a\u4e8b\u4ef6\u68c0\u6d4b\u673a\u5236\u5b58\u5728\uff0c\u7c7b\u4f3c\u4e8eepoll_wait\u3002<\/p>\n<p>\u4e4d\u4e00\u770b\u53bb\uff0cRDMA\u7f16\u7a0b\u4f3c\u4e4e\u5f88\u7b80\u5355\uff0c\u53ea\u8981\u628a\u4e0a\u8ff0\u51fd\u6570\u66ff\u6362\u4e86\u5c31\u53ef\u4ee5\u3002\u4f46\u4e8b\u5b9e\u4e0a\uff0c\u4e0a\u8ff0\u7684\u5bf9\u5e94\u5173\u7cfb\u90fd\u662f\u8fd1\u4f3c\u3001\u7c7b\u4f3c\uff0c\u800c\u4e0d\u662f\u7b49\u4ef7\u3002<\/p>\n<p><span class=\"bjh-strong\">\u5173\u952e\u533a\u522b\u5728\u4e8e\uff0csocket API\u90fd\u662f\u540c\u6b65\u64cd\u4f5c\uff0c\u800cRDMA API\u90fd\u662f\u5f02\u6b65\u64cd\u4f5c\uff08\u6ce8\u610f\u5f02\u6b65\u548c\u975e\u963b\u585e\u662f\u4e24\u4e2a\u4e0d\u540c\u7684\u6982\u5ff5\uff09<\/span>\u3002<\/p>\n<p>\u5177\u4f53\u800c\u8a00\uff0cibv_post_send\u51fd\u6570\u8fd4\u56de\u6210\u529f\uff0c\u4ec5\u4ec5\u610f\u5473\u7740\u6210\u529f\u5730\u5411\u7f51\u5361\u63d0\u4ea4\u4e86\u53d1\u9001\u8bf7\u6c42\uff0c\u5e76\u4e0d\u4fdd\u8bc1\u6570\u636e\u771f\u7684\u88ab\u53d1\u9001\u51fa\u53bb\u4e86\u3002\u5982\u679c\u6b64\u65f6\u7acb\u9a6c\u5bf9\u53d1\u9001\u6570\u636e\u6240\u5728\u7684\u5185\u5b58\u8fdb\u884c\u5199\u64cd\u4f5c\uff0c\u90a3\u4e48\u53d1\u9001\u51fa\u53bb\u7684\u6570\u636e\u5c31\u5f88\u53ef\u80fd\u662f\u4e0d\u6b63\u786e\u7684\u3002socket API\u662f\u540c\u6b65\u64cd\u4f5c\uff0cwrite\u51fd\u6570\u8fd4\u56de\u6210\u529f\uff0c\u610f\u5473\u7740\u6570\u636e\u5df2\u7ecf\u88ab\u5199\u5165\u4e86\u5185\u6838\u7f13\u51b2\u533a\uff0c\u867d\u7136\u6b64\u65f6\u6570\u636e\u672a\u5fc5\u771f\u7684\u53d1\u9001\u4e86\uff0c\u4f46\u5e94\u7528\u7a0b\u5e8f\u5df2\u7ecf\u53ef\u4ee5\u968f\u610f\u5904\u7f6e\u53d1\u9001\u6570\u636e\u6240\u5728\u7684\u5185\u5b58\u3002<\/p>\n<p>\u53e6\u4e00\u65b9\u9762\uff0cibv_poll_cq\u6240\u83b7\u53d6\u7684\u4e8b\u4ef6\uff0c\u4e0eepoll_wait\u83b7\u53d6\u7684\u4e8b\u4ef6\u4e5f\u662f\u4e0d\u540c\u7684\u3002\u524d\u8005\u8868\u660e\uff0c\u4e4b\u524d\u63d0\u4ea4\u7ed9\u7f51\u5361\u7684\u67d0\u4e00\u53d1\u9001\u6216\u63a5\u6536\u8bf7\u6c42\u5b8c\u6210\u4e86\uff1b\u800c\u540e\u8005\u8868\u793a\uff0c\u6709\u65b0\u7684\u62a5\u6587\u88ab\u6210\u529f\u53d1\u9001\u6216\u662f\u63a5\u6536\u4e86\u3002\u8fd9\u4e9b\u8bed\u4e49\u4e0a\u7684\u53d8\u5316\u4f1a\u5f71\u54cd\u5230\u4e0a\u5c42\u5e94\u7528\u7a0b\u5e8f\u7684\u5185\u5b58\u4f7f\u7528\u6a21\u5f0f\u548cAPI\u8c03\u7528\u65b9\u5f0f\u3002<\/p>\n<p>\u9664\u4e86\u540c\u6b65\u3001\u5f02\u6b65\u7684\u8bed\u4e49\u533a\u522b\u5916\uff0c<span class=\"bjh-strong\">RDMA\u7f16\u7a0b\u8fd8\u6709\u4e00\u4e2a\u5173\u952e\u8981\u7d20\uff0c\u5373\u6240\u6709\u53c2\u4e0e\u53d1\u9001\u3001\u63a5\u6536\u7684\u6570\u636e\uff0c\u6240\u5728\u7684\u5185\u5b58\u5fc5\u987b\u7ecf\u8fc7\u6ce8\u518c<\/span>\u3002<\/p>\n<p>\u6240\u8c13\u5185\u5b58\u6ce8\u518c\uff0c\u7b80\u5355\u7406\u89e3\uff0c\u5c31\u662f\u628a\u4e00\u6bb5\u5185\u5b58\u7684\u865a\u62df\u5730\u5740\u548c\u7269\u7406\u5730\u5740\u95f4\u7684\u6620\u5c04\u5173\u7cfb\u7ed1\u5b9a\u597d\u4ee5\u540e\u6ce8\u518c\u7ed9\u7f51\u5361\u786c\u4ef6\u3002\u8fd9\u4e48\u505a\u7684\u539f\u56e0\u5728\u4e8e\uff0c\u53d1\u9001\u8bf7\u6c42\u548c\u63a5\u6536\u8bf7\u6c42\u6240\u63d0\u4ea4\u7684\u5185\u5b58\u5730\u5740\uff0c\u90fd\u662f\u865a\u62df\u5730\u5740\u3002\u53ea\u6709\u5b8c\u6210\u5185\u5b58\u6ce8\u518c\uff0c\u7f51\u5361\u624d\u80fd\u628a\u8bf7\u6c42\u4e2d\u7684\u865a\u62df\u5730\u5740\u7ffb\u8bd1\u6210\u7269\u7406\u5730\u5740\uff0c\u624d\u80fd\u8df3\u8fc7CPU\u505a\u76f4\u63a5\u5185\u5b58\u8bbf\u95ee\u3002\u5185\u5b58\u6ce8\u518c\uff08\u4ee5\u53ca\u89e3\u6ce8\u518c\uff09\u662f\u4e00\u4e2a\u5f88\u6162\u7684\u64cd\u4f5c\uff0c\u5b9e\u9645\u5e94\u7528\u4e2d\u901a\u5e38\u9700\u8981\u6784\u5efa\u5185\u5b58\u6c60\uff0c\u901a\u8fc7\u4e00\u6b21\u6027\u6ce8\u518c\u3001\u91cd\u590d\u4f7f\u7528\u6765\u907f\u514d\u9891\u7e41\u8c03\u7528\u6ce8\u518c\u51fd\u6570\u3002<\/p>\n<p>\u5173\u4e8eRDMA\u7f16\u7a0b\uff0c\u8fd8\u6709\u5f88\u591a\u7ec6\u8282\u662f\u666e\u901a\u7f51\u7edc\u7f16\u7a0b\u6240\u4e0d\u5173\u5fc3\u7684\uff08\u6bd4\u5982\u6d41\u63a7\u3001TCP\u56de\u9000\u3001\u975e\u4e2d\u65ad\u6a21\u5f0f\u7b49\u7b49\uff09\uff0c\u8fd9\u91cc\u5c31\u4e0d\u4e00\u4e00\u5c55\u5f00\u4ecb\u7ecd\u4e86\u3002<\/p>\n<p>\u603b\u800c\u8a00\u4e4b\uff0cRDMA\u7f16\u7a0b\u5e76\u4e0d\u662f\u4e00\u4ef6\u5bb9\u6613\u7684\u4e8b\u60c5\u3002\u90a3\u4e48\uff0c\u5982\u4f55\u624d\u80fd\u8ba9\u5f00\u53d1\u8005\u5feb\u901f\u7528\u4e0aRDMA\u8fd9\u6837\u7684\u9ad8\u6027\u80fd\u7f51\u7edc\u6280\u672f\u5462\uff1f<\/p>\n<p>\u89c1\u62db\u62c6\u62db\uff0c\u5728brpc\u4e2d\u4f7f\u7528RDMA<\/p>\n<p>\u4e0a\u9762\u8bf4\u4e86\u5f88\u591asocket API\u548cverbs API\u7684\u5bf9\u6bd4\uff0c\u4e3b\u8981\u8fd8\u662f\u4e3a\u4e86\u886c\u6258RDMA\u7f16\u7a0b\u672c\u8eab\u7684\u590d\u6742\u5ea6\u3002\u4e8b\u5b9e\u4e0a\uff0c\u5728\u5b9e\u9645\u751f\u4ea7\u73af\u5883\u4e2d\uff0c\u76f4\u63a5\u8c03\u7528socket API\u8fdb\u884c\u7f51\u7edc\u4f20\u8f93\u7684\u4e1a\u52a1\u5e76\u4e0d\u591a\uff0c\u7edd\u5927\u591a\u6570\u90fd\u901a\u8fc7rpc\u6846\u67b6\u95f4\u63a5\u4f7f\u7528socket API\u3002\u4e00\u4e2a\u5b8c\u6574\u7684rpc\u6846\u67b6\uff0c\u9700\u8981\u63d0\u4f9b\u4e00\u6574\u5957\u7f51\u7edc\u4f20\u8f93\u7684\u89e3\u51b3\u65b9\u6848\uff0c\u5305\u62ec\u6570\u636e\u5e8f\u5217\u5316\u3001\u9519\u8bef\u5904\u7406\u3001\u591a\u7ebf\u7a0b\u5904\u7406\u7b49\u7b49\u3002<\/p>\n<p>brpc\u662f\u767e\u5ea6\u5f00\u6e90\u7684\u4e00\u4e2a\u57fa\u4e8eC++\u7684rpc\u6846\u67b6\uff0c\u5176\u76f8\u5bf9\u4e8egrpc\u66f4\u9002\u7528\u4e8e\u6709\u9ad8\u6027\u80fd\u9700\u6c42\u7684\u573a\u666f\u3002\u5728\u4f20\u7edfTCP\u4f20\u8f93\u4ee5\u5916\uff0cbrpc\u4e5f\u63d0\u4f9b\u4e86RDMA\u7684\u4f7f\u7528\u65b9\u5f0f\uff0c\u4ee5\u8fdb\u4e00\u6b65\u7a81\u7834\u64cd\u4f5c\u7cfb\u7edf\u672c\u8eab\u7684\u6027\u80fd\u9650\u5236\u3002\u6709\u5173\u5177\u4f53\u7684\u5b9e\u73b0\u7ec6\u8282\uff0c\u611f\u5174\u8da3\u7684\u670b\u53cb\u53ef\u4ee5\u53c2\u89c1github\u4e0a\u7684\u6e90\u7801\uff08https:\/\/github.com\/apache\/incubator-brpc\/tree\/rdma\uff09\u3002<\/p>\n<div class=\"img-container\"><img decoding=\"async\" class=\"normal\" src=\"https:\/\/pics2.baidu.com\/feed\/f703738da9773912ca612d9325d3931e347ae2ca.png?token=a73c2036a35e16e258614f0ec3e8e135&amp;s=42887A2311CE4CE94EDCACDE030090B2\" width=\"508px\" data-loadfunc=\"0\" data-loaded=\"0\" \/><\/div>\n<p>brpc client\u7aef\u4f7f\u7528RDMA<\/p>\n<div class=\"img-container\"><img decoding=\"async\" class=\"normal\" src=\"https:\/\/pics7.baidu.com\/feed\/dbb44aed2e738bd414abffd27c4192d0257ff998.png?token=fadd4a3ecb209572aa684f8c49062bdd&amp;s=0280782311CE4CEB4C79ACD30300C0B2\" width=\"512px\" data-loadfunc=\"0\" data-loaded=\"0\" \/><\/div>\n<p>brpc server\u7aef\u4f7f\u7528RDMA<\/p>\n<p>\u4e0a\u9762\u5206\u522b\u5217\u51fa\u4e86brpc\u4e2dclient\u548cserver\u4f7f\u7528RDMA\u7684\u65b9\u6cd5\uff0c\u5373\u5728channel\u548cserver\u521b\u5efa\u65f6\uff0c\u628ause_rdma\u8fd9\u4e2aoption\u8bbe\u7f6e\u4e3atrue\u5373\u53ef\uff08\u9ed8\u8ba4\u662ffalse\uff0c\u4e5f\u5c31\u662f\u4f7f\u7528TCP\uff09\u3002<\/p>\n<p>\u662f\u7684\uff0c\u53ea\u9700\u8fd9\u4e24\u884c\u4ee3\u7801\u3002\u5982\u679c\u4f60\u7684\u5e94\u7528\u7a0b\u5e8f\u672c\u8eab\u57fa\u4e8ebrpc\u6784\u5efa\uff0c\u90a3\u4e48\u4eceTCP\u8fc1\u79fb\u5230RDMA\uff0c\u51e0\u5206\u949f\u5c31\u591f\u4e86\u3002\u5f53\u7136\uff0c\u5728\u4e0a\u8ff0quick start\u4e4b\u540e\uff0c\u5982\u679c\u6709\u66f4\u9ad8\u7ea7\u7684\u8c03\u4f18\u9700\u6c42\uff0cbrpc\u4e5f\u63d0\u4f9b\u4e86\u4e00\u4e9b\u8fd0\u884c\u65f6\u7684flag\u53c2\u6570\u53ef\u8c03\u6574\uff0c\u6bd4\u5982\u5185\u5b58\u6c60\u5927\u5c0f\u3001qp\/cq\u7684\u5927\u5c0f\u3001\u8f6e\u8be2\u66ff\u4ee3\u4e2d\u65ad\u7b49\u7b49\u3002<\/p>\n<p>\u4e0b\u9762\u901a\u8fc7echo benchmark\u8bf4\u660ebrpc\u4f7f\u7528RDMA\u7684\u6027\u80fd\u6536\u76ca\uff08\u53ef\u4ee5\u5728github\u4ee3\u7801\u4e2d\u7684rdma_performance\u76ee\u5f55\u4e0b\u627e\u5230\u8be5benchmark\uff09\u3002\u572825G\u7f51\u7edc\u7684\u6d4b\u8bd5\u73af\u5883\u4e2d\uff0c\u5bf9\u4e8e2KB\u4ee5\u4e0b\u7684\u6d88\u606f\uff0c\u4f7f\u7528RDMA\u540e\uff0cserver\u7aef\u7684\u6700\u5927QPS\u63d0\u9ad8\u4e8650%\u4ee5\u4e0a\uff0c200k\u7684QPS\u4e0b\u5e73\u5747\u65f6\u5ef6\u4e0b\u964d\u4e8650%\u4ee5\u4e0a\u3002<\/p>\n<div class=\"img-container\"><img decoding=\"async\" class=\"normal\" src=\"https:\/\/pics7.baidu.com\/feed\/3bf33a87e950352a8cc833018e89eef4b3118b5a.jpeg?token=bb82e359672891d0248a49c37dc66aae&amp;s=5215A1649F24B6C80443199B0300508D\" width=\"268px\" data-loadfunc=\"0\" data-loaded=\"0\" \/><\/div>\n<p>Echo benchmark\u4e0bserver\u7aef\u6700\u5927QPS\uff0825G\u7f51\u7edc\uff09<\/p>\n<div class=\"img-container\"><img decoding=\"async\" class=\"normal\" src=\"https:\/\/pics5.baidu.com\/feed\/3bf33a87e950352a92df08d28d89eef4b0118bfa.jpeg?token=6d9d16ed8329ae477c5f7ccd6ab57605&amp;s=3852E100DBB6B6C80E524F9F0300A08D\" width=\"275px\" data-loadfunc=\"0\" data-loaded=\"0\" \/><\/div>\n<p>Echo benchmark\u5728200k QPS\u4e0b\u7684\u5e73\u5747\u65f6\u5ef6\uff0825G\u7f51\u7edc\uff09<\/p>\n<p>RDMA\u5bf9echo benchmark\u7684\u6027\u80fd\u6536\u76ca\u4ec5\u4f5c\u4e3a\u53c2\u8003\u3002\u5b9e\u9645\u5e94\u7528\u7a0b\u5e8f\u7684workload\u4e0eecho\u76f8\u5dee\u5de8\u5927\u3002\u5bf9\u4e8e\u67d0\u4e9b\u4e1a\u52a1\uff0c\u4f7f\u7528RDMA\u7684\u6536\u76ca\u53ef\u80fd\u4f1a\u5c0f\u4e8e\u4e0a\u8ff0\u503c\uff0c\u56e0\u4e3a\u7f51\u7edc\u90e8\u5206\u7684\u5f00\u9500\u4ec5\u5360\u5230\u5176\u4e1a\u52a1\u5f00\u9500\u7684\u4e00\u90e8\u5206\u3002\u4f46\u5bf9\u4e8e\u53e6\u4e00\u4e9b\u4e1a\u52a1\uff0c\u7531\u4e8e\u907f\u514d\u4e86\u5185\u6838\u64cd\u4f5c\u5bf9\u4e1a\u52a1\u903b\u8f91\u7684\u5e72\u6270\uff0c\u4f7f\u7528RDMA\u7684\u6536\u76ca\u751a\u81f3\u4f1a\u9ad8\u4e8e\u4e0a\u8ff0\u503c\u3002\u8fd9\u91cc\u4e3e\u4e24\u4e2a\u5e94\u7528brpc\u7684\u4f8b\u5b50\uff1a<\/p>\n<p><span class=\"bjh-ul\"><span class=\"bjh-li\"><span class=\"bjh-p\">\u5728\u767e\u5ea6\u5206\u5e03\u5f0f\u5757\u5b58\u50a8\u4e1a\u52a1\u4e2d\uff0c\u4f7f\u7528RDMA\u76f8\u6bd4\u4e8e\u4f7f\u7528TCP\uff0c4KB fio\u65f6\u5ef6\u6d4b\u8bd5\u7684\u5e73\u5747\u503c\u4e0b\u964d\u4e86\u7ea630%\uff08RDMA\u4ec5\u4f18\u5316\u4e86\u7f51\u7edcIO\uff0c\u5b58\u50a8IO\u5219\u4e0d\u53d7RDMA\u5f71\u54cd\uff09\u3002<\/span><\/span><\/span><\/p>\n<p><span class=\"bjh-ul\"><span class=\"bjh-li\"><span class=\"bjh-p\">\u5728\u767e\u5ea6\u5206\u5e03\u5f0f\u5185\u5b58KV\u4e1a\u52a1\u4e2d\uff0c\u4f7f\u7528RDMA\u76f8\u6bd4\u4e8e\u4f7f\u7528TCP\uff0c200k QPS\u4e0b\uff0c\u5355\u6b21\u67e5\u8be230key\u7684\u5e73\u5747\u65f6\u5ef6\u4e0b\u964d\u4e8689%\uff0c\u800c99\u5206\u4f4d\u65f6\u5ef6\u4e0b\u964d\u4e8696%\u3002<\/span><\/span><\/span><\/p>\n<p>RDMA \u9700\u8981\u57fa\u7840\u8bbe\u65bd\u652f\u6301<\/p>\n<p>RDMA\u662f\u4e00\u79cd\u65b0\u5174\u7684\u9ad8\u6027\u80fd\u7f51\u7edc\u6280\u672f\uff0c\u5bf9\u4e8e\u901a\u4fe1\u4e24\u7aef\u5747\u53ef\u63a7\u7684\u6570\u636e\u4e2d\u5fc3\u5185\u7f51\u7edcIO\u5bc6\u96c6\u4e1a\u52a1\uff0c\u5982HPC\u3001\u673a\u5668\u5b66\u4e60\u3001\u5b58\u50a8\u3001\u6570\u636e\u5e93\u7b49\uff0c\u610f\u4e49\u91cd\u5927\u3002\u6211\u4eec\u9f13\u52b1\u76f8\u5173\u4e1a\u52a1\u7684\u5f00\u53d1\u8005\u5173\u6ce8RDMA\u6280\u672f\uff0c\u5c1d\u8bd5\u5229\u7528brpc\u6784\u5efa\u81ea\u5df1\u7684\u5e94\u7528\u4ee5\u5e73\u6ed1\u8fc1\u79fb\u81f3RDMA\u3002<\/p>\n<p>\u4f46\u662f\uff0c\u9700\u8981\u6307\u51fa\u7684\u662f\uff0cRDMA\u5f53\u524d\u8fd8\u65e0\u6cd5\u50cfTCP\u90a3\u6837\u901a\u7528\uff0c\u6709\u4e00\u4e9b\u57fa\u7840\u8bbe\u65bd\u5c42\u9762\u7684\u9650\u5236\u9700\u8981\u6ce8\u610f\uff1a<\/p>\n<p><span class=\"bjh-ul\"><span class=\"bjh-li\"><span class=\"bjh-p\">RDMA\u9700\u8981\u7f51\u5361\u786c\u4ef6\u652f\u6301\u3002\u5e38\u89c1\u7684\u4e07\u5146\u7f51\u5361\u4e00\u822c\u4e0d\u652f\u6301\u8fd9\u9879\u6280\u672f\u3002<\/span><\/span><\/span><\/p>\n<p><span class=\"bjh-ul\"><span class=\"bjh-li\"><span 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