{"id":3863,"date":"2015-12-28T13:13:40","date_gmt":"2015-12-28T04:13:40","guid":{"rendered":"http:\/\/blog.bitmeister.jp\/?p=3863"},"modified":"2016-03-09T17:01:11","modified_gmt":"2016-03-09T08:01:11","slug":"linux%e3%81%ab%e5%ae%9f%e8%a3%85%e3%81%95%e3%82%8c%e3%81%a6%e3%81%84%e3%82%8btcp_metrics%e3%81%ab%e3%81%a4%e3%81%84%e3%81%a6","status":"publish","type":"post","link":"https:\/\/blog.bitmeister.jp\/?p=3863","title":{"rendered":"Linux\u306eTCP\u8f3b\u8f33\u30a6\u30a3\u30f3\u30c9\u30a6\u30b5\u30a4\u30ba\u3084\u30b9\u30ed\u30fc\u30b9\u30bf\u30fc\u30c8\u95be\u5024\u306e\u30ad\u30e3\u30c3\u30b7\u30e5\u3092\u7121\u52b9\u5316\u3059\u308b"},"content":{"rendered":"<p>TCP\u901a\u4fe1\u306e\u72b6\u614b\u3092\u76e3\u8996\u3057\u3066\u3044\u305f\u3068\u3053\u308d\u3001\u30b9\u30ed\u30fc\u30b9\u30bf\u30fc\u30c8\u95be\u5024\u306e\u521d\u671f\u5024\u304c\u3001\u30ab\u30fc\u30cd\u30eb\u5185\u3067\u5b9a\u7fa9\u3055\u308c\u3066\u3044\u308b\u521d\u671f\u5024\u3068\u7570\u306a\u3063\u3066\u3044\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3057\u305f\u3002\u8abf\u67fb\u3057\u305f\u3068\u3053\u308d\u3001Linux\u306b\u5b9f\u88c5\u3055\u308c\u3066\u3044\u308btcp_metrics\u304c\u539f\u56e0\u3067\u3057\u305f\u3002\u672c\u8a18\u4e8b\u3067\u306f\u3001tcp_metrics\u306e\u7121\u52b9\u5316\u65b9\u6cd5\u306b\u3064\u3044\u3066\u8aac\u660e\u3057\u307e\u3059\u3002<\/p>\n<p><!--more--><\/p>\n<p>Linux\u30ab\u30fc\u30cd\u30eb2.6.6\u4ee5\u964d\u306eTCP\u901a\u4fe1\u306b\u306ftcp_metrics\u3068\u3044\u3046\u6a5f\u80fd\u304c\u3042\u308a\u307e\u3059\u3002tcp_metrics\u306f\u3001\u30b9\u30ed\u30fc\u30b9\u30bf\u30fc\u30c8\u95be\u5024\u3084\u8f3b\u8f33\u30a6\u30a3\u30f3\u30c9\u30a6\u30b5\u30a4\u30ba\u3001RTT\u3068\u3044\u3063\u305fTCP\u60c5\u5831\u3092\u9001\u4fe1\u5148IP\u30a2\u30c9\u30ec\u30b9\u3068\u95a2\u9023\u4ed8\u3051\u3001TCP\u30b3\u30cd\u30af\u30b7\u30e7\u30f3\u7d42\u4e86\u6642\u306b\u30ad\u30e3\u30c3\u30b7\u30e5\u3057\u307e\u3059\u3002\u305d\u3057\u3066\u3001\u30ad\u30e3\u30c3\u30b7\u30e5\u3055\u308c\u305f\u9001\u4fe1\u5148IP\u30a2\u30c9\u30ec\u30b9\u3078TCP\u30b3\u30cd\u30af\u30b7\u30e7\u30f3\u3092\u958b\u59cb\u3059\u308b\u6642\u306b\u3001\u30ad\u30e3\u30c3\u30b7\u30e5\u3057\u305fTCP\u60c5\u5831\u3092\u305d\u306e\u901a\u4fe1\u306e\u521d\u671f\u5024\u306b\u8a2d\u5b9a\u3057\u307e\u3059\u3002<\/p>\n<p>\u9001\u4fe1\u5148IP\u30a2\u30c9\u30ec\u30b9\u306eTCP\u60c5\u5831\u3092\u30ad\u30e3\u30c3\u30b7\u30e5\u3059\u308b\u3053\u3068\u3067\u8f3b\u8f33\u3092\u9632\u3050\u3053\u3068\u304c\u3067\u304d\u308b\u6a5f\u80fd\u3067\u3059\u304c\u3001\u4f8b\u3048\u3070iperf\u306a\u3069\u3092\u4f7f\u3063\u3066\u30b9\u30eb\u30fc\u30d7\u30c3\u30c8\u3092\u6e2c\u5b9a\u3059\u308b\u6642\u306b\u306f\u3001TCP\u60c5\u5831\u306e\u521d\u671f\u5024\u3092\u52dd\u624b\u306b\u66f8\u304d\u63db\u3048\u3066\u3057\u307e\u3046\u305f\u3081\u3001\u6b63\u78ba\u306a\u6e2c\u5b9a\u306e\u59a8\u3052\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>\u4ee5\u4e0b\u306e\u30b3\u30de\u30f3\u30c9\u3067\u3001tcp_metrics\u304cTCP\u60c5\u5831\u3092\u30ad\u30e3\u30c3\u30b7\u30e5\u3059\u308b\u3053\u3068\u3092\u7121\u52b9\u306b\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"brush: bash; gutter: false; title: ; notranslate\" title=\"\">\r\n$ sudo sh -c &quot;echo 1 &gt; \/proc\/sys\/net\/ipv4\/tcp_no_metrics_save&quot;\r\n<\/pre>\n<p>\u3053\u308c\u3060\u3051\u3067\u306ftcp_metrics\u306f\u65b0\u305f\u306bTCP\u60c5\u5831\u3092\u30ad\u30e3\u30c3\u30b7\u30e5\u3057\u306a\u3044\u3060\u3051\u3067\u3001\u65e2\u306b\u30ad\u30e3\u30c3\u30b7\u30e5\u3057\u3066\u3044\u308bTCP\u60c5\u5831\u306f\u8a2d\u5b9a\u3055\u308c\u308b\u306e\u3067\u3001\u30ad\u30e3\u30c3\u30b7\u30e5\u3092\u6d88\u53bb\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"brush: bash; gutter: false; title: ; notranslate\" title=\"\">\r\n$ sudo ip tcp_metrics flush\r\n<\/pre>\n<p>\u78ba\u8a8d\u3057\u307e\u3059\u3002\u4f55\u3082\u8868\u793a\u3055\u308c\u306a\u3051\u308c\u3070\u30ad\u30e3\u30c3\u30b7\u30e5\u306f\u6d88\u53bb\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n<pre class=\"brush: bash; gutter: false; title: ; notranslate\" title=\"\">\r\n$ ip tcp_metrics show\r\n<\/pre>\n<p>&nbsp;<\/p>\n<p>tcp_metrics\u304cTCP\u60c5\u5831\u3092\u30ad\u30e3\u30c3\u30b7\u30e5\u3059\u308b\u3053\u3068\u3067\u3001TCP\u60c5\u5831\u306e\u521d\u671f\u5024\u304c\u66f8\u304d\u63db\u3048\u3089\u308c\u3066\u3057\u307e\u3044\u307e\u3059\u3002\u524d\u306eTCP\u30b3\u30cd\u30af\u30b7\u30e7\u30f3\u306e\u5f71\u97ff\u3092\u53d7\u3051\u305f\u304f\u306a\u3044\u5834\u5408\u306f\u7121\u52b9\u5316\u3057\u305f\u307b\u3046\u304c\u826f\u3044\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>TCP\u901a\u4fe1\u306e\u72b6\u614b\u3092\u76e3\u8996\u3057\u3066\u3044\u305f\u3068\u3053\u308d\u3001\u30b9\u30ed\u30fc\u30b9\u30bf\u30fc\u30c8\u95be\u5024\u306e\u521d\u671f\u5024\u304c\u3001\u30ab\u30fc\u30cd\u30eb\u5185\u3067\u5b9a\u7fa9\u3055\u308c\u3066\u3044\u308b\u521d\u671f\u5024\u3068\u7570\u306a\u3063\u3066\u3044\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3057\u305f\u3002\u8abf\u67fb\u3057\u305f\u3068\u3053\u308d\u3001Linux\u306b\u5b9f\u88c5\u3055\u308c\u3066\u3044\u308btcp_metrics\u304c\u539f\u56e0\u3067\u3057\u305f\u3002\u672c\u8a18\u4e8b\u3067\u306f [&hellip;]<\/p>\n","protected":false},"author":12,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[17],"tags":[],"class_list":["post-3863","post","type-post","status-publish","format-standard","hentry","category-tech"],"_links":{"self":[{"href":"https:\/\/blog.bitmeister.jp\/index.php?rest_route=\/wp\/v2\/posts\/3863","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.bitmeister.jp\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.bitmeister.jp\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.bitmeister.jp\/index.php?rest_route=\/wp\/v2\/users\/12"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.bitmeister.jp\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=3863"}],"version-history":[{"count":18,"href":"https:\/\/blog.bitmeister.jp\/index.php?rest_route=\/wp\/v2\/posts\/3863\/revisions"}],"predecessor-version":[{"id":3889,"href":"https:\/\/blog.bitmeister.jp\/index.php?rest_route=\/wp\/v2\/posts\/3863\/revisions\/3889"}],"wp:attachment":[{"href":"https:\/\/blog.bitmeister.jp\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=3863"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.bitmeister.jp\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=3863"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.bitmeister.jp\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=3863"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}