{"id":5328,"date":"2021-06-11T11:56:42","date_gmt":"2021-06-11T03:56:42","guid":{"rendered":"https:\/\/damogame.cn\/wordpress\/?p=5328"},"modified":"2021-06-11T11:56:42","modified_gmt":"2021-06-11T03:56:42","slug":"netmap-%e4%bb%8b%e7%bb%8d","status":"publish","type":"post","link":"https:\/\/i007.cc\/wordpress\/archives\/5328","title":{"rendered":"netmap \u4ecb\u7ecd"},"content":{"rendered":"
\n
\n
\n

\u539f\u6587\u5730\u5740<\/a><\/p>\n<\/div>\n

\n
\"\"<\/p>\n
\u75af\u75af\u766b\u766b<\/a> 2016-10-20 09:58:52<\/span> \"\" 17245<\/span> <\/a> \"\" \"\" \u6536\u85cf<\/span> 10 <\/span><\/div>\n<\/div>\n
\n
\u5206\u7c7b\u4e13\u680f\uff1a<\/span> Netmap<\/a> \u6587\u7ae0\u6807\u7b7e\uff1a<\/span> freebsd<\/a> netmap<\/a> ring<\/a> driver<\/a> kernel<\/a><\/div>\n<\/div>\n
\n
\n
\u7248\u6743\u58f0\u660e\uff1a\u672c\u6587\u4e3a\u535a\u4e3b\u539f\u521b\u6587\u7ae0\uff0c\u9075\u5faa CC 4.0 BY-SA <\/a>\u7248\u6743\u534f\u8bae\uff0c\u8f6c\u8f7d\u8bf7\u9644\u4e0a\u539f\u6587\u51fa\u5904\u94fe\u63a5\u548c\u672c\u58f0\u660e\u3002<\/div>\n
\u672c\u6587\u94fe\u63a5\uff1ahttps:\/\/blog.csdn.net\/fengfengdiandia\/article\/details\/52869290<\/a><\/div>\n<\/div>\n<\/div>\n
\u7248\u6743<\/a><\/div>\n<\/div>\n<\/div>\n<\/div>\n
<\/div>\n
\n
\n
\n

netmap<\/code>\u662f\u4e00\u4e2a\u9ad8\u6548\u7684\u6536\u53d1\u62a5\u6587\u7684 I\/O \u6846\u67b6\uff0c\u5df2\u7ecf\u96c6\u6210\u5728 FreeBSD \u7684\u5185\u90e8\u4e86\u3002
\n\u5f53\u7136\uff0c\u4e5f\u53ef\u4ee5\u5728 Linux \u4e0b\u7f16\u8bd1\u4f7f\u7528 \u3002<\/p>\n

<\/a><\/a>\u4e00\u3001\u67b6\u6784<\/h2>\n

\u73b0\u5728\u7684\u7f51\u5361\u90fd\u4f7f\u7528\u591a\u4e2a buffer \u6765\u53d1\u9001\u548c\u63a5\u6536 packet\uff0c\u5e76\u6709\u4e00\u4e2a\u53ebNIC ring<\/code>\u7684\u73af\u5f62\u6570\u7ec4\u3002
\nNIC ring \u662f\u9759\u6001\u5206\u914d\u7684\uff0c\u5b83\u7684\u69fd\u6307\u5411mbufs<\/code>\u94fe\u7684\u90e8\u5206\u7f13\u51b2\u533a\u3002<\/p>\n

\"Mbufs<\/p>\n

netmap \u5185\u5b58\u6620\u5c04\u7f51\u5361\u7684packet buffer<\/code>\u5230\u7528\u6237\u6001\uff0c\u5b9e\u73b0\u4e86\u81ea\u5df1\u7684\u53d1\u9001\u548c\u63a5\u6536\u62a5\u6587\u7684circular ring<\/code>\u6765\u5bf9\u5e94\u7f51\u5361\u7684 ring\uff0c\u4f7f\u7528 netmap \u65f6\uff0c\u7a0b\u5e8f\u8fd0\u884c\u5728\u7528\u6237\u6001\uff0c\u5373\u4f7f\u51fa\u4e86\u95ee\u9898\u4e5f\u4e0d\u4f1a crash \u64cd\u4f5c\u7cfb\u7edf\u3002<\/p>\n

\u4e0b\u56fe\u663e\u793a\u4e86\u4e00\u4e2a\u63a5\u53e3\u53ef\u4ee5\u6709\u591a\u4e2a netmap ring\u3002
\n\u5c06\u6587\u4ef6\u63cf\u8ff0\u7b26\u7ed1\u5b9a\u5230 NIC \u65f6\uff0c\u5e94\u7528\u7a0b\u5e8f\u53ef\u4ee5\u9009\u62e9\u5c06\u6240\u6709 ring<\/code>\u6216\u4ec5\u4e00\u4e2a ring<\/code>\u9644\u52a0\u5230\u6587\u4ef6\u63cf\u8ff0\u7b26\u3002<\/p>\n