{"id":16795,"date":"2019-07-24T10:00:27","date_gmt":"2019-07-24T01:00:27","guid":{"rendered":"http:\/\/www.skyarch.net\/blog\/?p=16795"},"modified":"2019-07-23T13:56:48","modified_gmt":"2019-07-23T04:56:48","slug":"bcc-%e3%81%ab%e6%b7%bb%e4%bb%98%e3%81%95%e3%82%8c%e3%81%a6%e3%81%84%e3%82%8b%e4%be%bf%e5%88%a9%e3%83%84%e3%83%bc%e3%83%ab%e8%89%b2%e3%80%85","status":"publish","type":"post","link":"https:\/\/www.skyarch.net\/blog\/bcc-%e3%81%ab%e6%b7%bb%e4%bb%98%e3%81%95%e3%82%8c%e3%81%a6%e3%81%84%e3%82%8b%e4%be%bf%e5%88%a9%e3%83%84%e3%83%bc%e3%83%ab%e8%89%b2%e3%80%85\/","title":{"rendered":"bcc \u306b\u6dfb\u4ed8\u3055\u308c\u3066\u3044\u308b\u4fbf\u5229\u30c4\u30fc\u30eb\u8272\u3005"},"content":{"rendered":"

\u524d\u56de<\/a>\u306f eBPF \u3092\u5229\u7528\u3059\u308b\u305f\u3081\u306b bcc \u3092\u5c0e\u5165\u3057\u307e\u3057\u305f\u3002\u672c\u6765 bcc \u306f\u81ea\u5206\u3067\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u66f8\u304f\u3053\u3068\u304c\u524d\u63d0\u3067\u3059\u304c\u3001\u6a19\u6e96\u3067\u6dfb\u4ed8\u3055\u308c\u3066\u3044\u308b\u30c4\u30fc\u30eb\u7fa4\u3060\u3051\u3067\u3082\u304b\u306a\u308a\u9762\u767d\u3044\u3053\u3068\u304c\u308f\u304b\u308a\u307e\u3059\u3002\u305f\u3060\u6dfb\u4ed8\u3055\u308c\u3066\u3044\u308b\u30b3\u30de\u30f3\u30c9\u3060\u3051\u3067\u3082 100 \u4ee5\u4e0a\u3042\u308b\u306e\u3067\u5168\u90e8\u53d6\u308a\u4e0a\u3052\u308b\u3053\u3068\u306f\u3067\u304d\u307e\u305b\u3093\u304c\u3001bcc Tutorial<\/a> \u306b\u53d6\u308a\u4e0a\u3052\u3089\u308c\u3066\u3044\u308b\u30b3\u30de\u30f3\u30c9\u3060\u3051\u3067\u3082\u8272\u3005\u9762\u767d\u3044\u3053\u3068\u304c\u308f\u304b\u308b\u306e\u3067\u3054\u7d39\u4ecb\u3057\u305f\u3044\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n

execsnoop<\/h2>\n

\u3053\u306e\u30b3\u30de\u30f3\u30c9\u306f\u524d\u56de\u306e\u52d5\u4f5c\u78ba\u8a8d\u306b\u3082\u4f7f\u7528\u3057\u307e\u3057\u305f\u3002\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u5b9f\u884c\u3092\u8a18\u9332\u3059\u308b\u3082\u306e\u3067\u3059\u3002<\/p>\n

$ sudo \/usr\/share\/bcc\/tools\/execsnoop\nPCOMM            PID    PPID   RET ARGS\ndhclient-script  19826  2318     0 \/usr\/sbin\/dhclient-script\nhostname         19828  19827    0 \/bin\/hostname\ncat              19830  19829    0 \/bin\/cat \/proc\/cmdline\ncat              19832  19831    0 \/bin\/cat \/proc\/cmdline<\/code><\/pre>\n
bcc Tutorial \u306b\u3082\u8a18\u8f09\u304c\u3042\u308b\u901a\u308a\u3001\u8d77\u52d5\u3057\u3066\u76f4\u3050\u7d42\u4e86\u3057\u3066\u3057\u307e\u3046\u304c\u305f\u304f\u3055\u3093\u8d77\u52d5\u3055\u308c\u3066\u3044\u308b\u30b3\u30de\u30f3\u30c9\u304c\u8ca0\u8377\u306e\u539f\u56e0\u306b\u306a\u3063\u3066\u3044\u308b\u5834\u5408\u306f\u3001ps \u3084 top \u306a\u3069\u3067\u898b\u3064\u3051\u306b\u304f\u3044\u305f\u3081\u3001\u3053\u3046\u3044\u3046\u30c4\u30fc\u30eb\u304c\u5fc5\u8981\u306b\u306a\u308a\u307e\u3059\u3002\u4f3c\u305f\u3088\u3046\u306a\u30b3\u30de\u30f3\u30c9\u306b psacct \u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n
opensnoop<\/h2>\n
\u3069\u306e\u30d7\u30ed\u30bb\u30b9\u304c\u3069\u306e\u30d5\u30a1\u30a4\u30eb\u3092\u958b\u3044\u3066\u3044\u308b\u306e\u304b\u304c\u308f\u304b\u308a\u307e\u3059\u3002\u610f\u5916\u3068\u3053\u308c\u3092\u306a\u304c\u3081\u3066\u3044\u308b\u3060\u3051\u3067\u308f\u304b\u308b\u3053\u3068\u3082\u591a\u3044\u3067\u3059\u3002<\/p>\n
$ sudo .\/opensnoop\nPID    COMM               FD ERR PATH\n2513   amazon-ssm-agen    11   0 \/var\/lib\/amazon\/ssm\/localcommands\n30697  opensnoop          -1   2 \/usr\/lib64\/python2.7\/encodings\/ascii.so\n30697  opensnoop          -1   2 \/usr\/lib64\/python2.7\/encodings\/asciimodule.so\n30697  opensnoop          12   0 \/usr\/lib64\/python2.7\/encodings\/ascii.py\n30697  opensnoop          13   0 \/usr\/lib64\/python2.7\/encodings\/ascii.pyc\n2513   amazon-ssm-agen    11   0 \/var\/lib\/amazon\/ssm\/localcommands\n1968   irqbalance          6   0 \/proc\/interrupts\n1968   irqbalance          6   0 \/proc\/stat\n1968   irqbalance          6   0 \/proc\/irq\/24\/smp_affinity\n2513   amazon-ssm-agen    11   0 \/var\/lib\/amazon\/ssm\/localcommands\n29112  pickup             12   0 maildrop\n2513   amazon-ssm-agen    11   0 \/var\/lib\/amazon\/ssm\/localcommands\n2513   amazon-ssm-agen    11   0 \/var\/lib\/amazon\/ssm\/localcommands\n2513   amazon-ssm-agen     8   0 \/proc\/sys\/kernel\/hostname\n2513   amazon-ssm-agen    11   0 \/var\/lib\/amazon\/ssm\/localcommands<\/code><\/pre>\n
xfsslower<\/h2>\n
\u3053\u3053\u3067\u306f\u3001Amazon Linux 2 \u306e\u6a19\u6e96\u30d5\u30a1\u30a4\u30eb\u30b7\u30b9\u30c6\u30e0\u304c xfs \u306a\u306e\u3067\u3001xfsslower \u3092\u53d6\u308a\u4e0a\u3052\u307e\u3059\u304c\u3001ext4 \u306e ext4slower \u306a\u3069\u3082\u3042\u308a\u307e\u3059\u3002<\/p>\n
\u3069\u3093\u306a\u30b3\u30de\u30f3\u30c9\u304b\u3068\u8a00\u3046\u3068\u6307\u5b9a\u3057\u305f\u6642\u9593\u4ee5\u4e0aIO\u306b\u6642\u9593\u304c\u304b\u304b\u3063\u305f\u5834\u5408\u306b\u305d\u306e\u30b3\u30de\u30f3\u30c9\u540d\u3068\u30d5\u30a1\u30a4\u30eb\u540d\u3092\u8868\u793a\u3057\u3066\u304f\u308c\u308b\u30b3\u30de\u30f3\u30c9\u3067\u3059\u3002<\/p>\n
\u306a\u3093\u304b\u30d7\u30ed\u30bb\u30b9\u304c\u9045\u3044\u306a\u3041\u3068\u3044\u3046\u6642\u306b\u30d5\u30a1\u30a4\u30ebIO\u304c\u30dc\u30c8\u30eb\u30cd\u30c3\u30af\u306b\u306a\u308b\u3053\u3068\u304c\u3042\u308b\u306e\u3067\u3001\u554f\u984c\u306e\u5207\u308a\u5206\u3051\u306b\u30ed\u30b0\u3092\u53d6\u3063\u3066\u304a\u304f\u3068\u6709\u52b9\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u3002<\/p>\n
\u4ee5\u4e0b\u306e\u5b9f\u884c\u4f8b\u3067\u306f dd \u30b3\u30de\u30f3\u30c9\u3067\u7121\u7406\u3084\u308a 10ms \u4ee5\u4e0a\u306e\u30ec\u30a4\u30c6\u30f3\u30b7\u3092\u4f5c\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n
$ sudo .\/xfsslower\nTracing XFS operations slower than 10 ms\nTIME     COMM           PID    T BYTES   OFF_KB   LAT(ms) FILENAME\n06:52:38 dd             29540  W 41943040 0          15.22 aa\n06:53:10 dd             29541  W 41943040 0          15.20 aa\n06:53:19 dd             29542  W 41943040 0          15.23 aa\n06:53:24 dd             29543  W 41943040 0          15.13 aa\n06:53:26 dd             29544  W 41943040 0          15.31 aa\n06:53:29 dd             29545  W 41943040 0          15.16 aa\n06:53:43 dd             29597  W 41943040 0          15.16 aa<\/code><\/pre>\n
biolatency<\/h2>\n
diskio \u306e\u30ec\u30a4\u30c6\u30f3\u30b7\u3092\u8868\u793a\u3057\u3066\u304f\u308c\u307e\u3059\u3002\u5358\u7d14\u306a iostat \u3088\u308a\u3082\u8a73\u7d30\u306a\u60c5\u5831\u3092\u5f97\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002 \u30ec\u30a4\u30c6\u30f3\u30b7\u306e\u5206\u5e03\u72b6\u6cc1\u304b\u3089\u3001\u30c7\u30a3\u30b9\u30af\u30a2\u30af\u30bb\u30b9\u306e\u72b6\u6cc1\u3092\u77e5\u308b\u306e\u306b\u5f79\u7acb\u3061\u307e\u3059\u3002<\/p>\n
\u3067\u304d\u308c\u3070\u3001IO\u30b5\u30a4\u30ba\u3068\u306e\u30af\u30ed\u30b9\u96c6\u8a08\u306b\u3059\u308b\u3068\u9762\u767d\u3044\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u3002<\/p>\n
$ sudo .\/biolatency\nTracing block device I\/O... Hit Ctrl-C to end.\n^C\n     usecs               : count     distribution\n         0 -> 1          : 0        |                                        |\n         2 -> 3          : 0        |                                        |\n         4 -> 7          : 0        |                                        |\n         8 -> 15         : 0        |                                        |\n        16 -> 31         : 1        |                                        |\n        32 -> 63         : 1        |                                        |\n        64 -> 127        : 0        |                                        |\n       128 -> 255        : 0        |                                        |\n       256 -> 511        : 21       |**********                              |\n       512 -> 1023       : 59       |******************************          |\n      1024 -> 2047       : 13       |******                                  |\n      2048 -> 4095       : 70       |************************************    |\n      4096 -> 8191       : 77       |****************************************|<\/code><\/pre>\n
cachestat<\/h2>\n
\u30c7\u30a3\u30b9\u30af\u30ad\u30e3\u30c3\u30b7\u30e5\u306e\u30d2\u30c3\u30c8\u7387\u304c\u308f\u304b\u308a\u307e\u3059\u3002\u307e\u305f\u30c0\u30fc\u30c6\u30a3\u30da\u30fc\u30b8\u306e\u72b6\u6cc1\u304c\u308f\u304b\u308a\u307e\u3059\u3002\u30c7\u30a3\u30b9\u30af\u30ad\u30e3\u30c3\u30b7\u30e5\u306b\u30d2\u30c3\u30c8\u3059\u308b\u304b\u3069\u3046\u304b\u306f\u6027\u80fd\u306b\u5927\u304d\u304f\u95a2\u308f\u308b\u306e\u3067\u3001\u3068\u3066\u3082\u6709\u52b9\u3067\u3059\u3002<\/p>\n
\u3082\u3057\u30c7\u30a3\u30b9\u30afIO\u304c\u591a\u304f\u3066\u3001\u30ad\u30e3\u30c3\u30b7\u30e5\u30d2\u30c3\u30c8\u7387\u304c\u4f4e\u3044\u3088\u3046\u306a\u3089\u3070\u3001\u30e1\u30e2\u30ea\u306e\u5897\u5f37\u3092\u691c\u8a0e\u3059\u308b\u306a\u3069\u306e\u65bd\u7b56\u304c\u5fc5\u8981\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n
$ sudo .\/cachestat\n    HITS   MISSES  DIRTIES HITRATIO   BUFFERS_MB  CACHED_MB\n       0        0        0    0.00%            2        398\n       0        0        0    0.00%            2        398\n       0        0        0    0.00%            2        398\n     992        0        0  100.00%            2        398\n       0        0        0    0.00%            2        398\n       0        0        0    0.00%            2        398\n       0        0        0    0.00%            2        398\n       0        0        0    0.00%            2        398\n    1041        0        0  100.00%            2        398\n       0        0        0    0.00%            2        398\n       0        0    10240    0.00%            2        398<\/code><\/pre>\n
runqlat<\/h2>\n
\u30d7\u30ed\u30bb\u30b9\u304cCPU\u3092\u5f85\u3063\u3066\u3044\u308b\u6642\u9593\u306e\u5206\u5e03\u3092\u8868\u793a\u3057\u3066\u304f\u308c\u307e\u3059\u3002\u3082\u3057\u3053\u306e\u5206\u5e03\u304c\u9577\u3044\u6642\u9593\u306e\u65b9\u306b\u9577\u304f\u306a\u3063\u3066\u3044\u308b\u5834\u5408\u306f CPU \u306e\u5897\u5f37\u304c\u5fc5\u8981\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u3002\u307e\u305f\u5b9a\u5e38\u7684\u306b\u76e3\u8996\u3059\u308b\u306e\u3067\u3042\u308c\u3070 runqslower \u306e\u65b9\u304c\u826f\u3044\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u3002<\/p>\n
$ sudo .\/runqlat\nTracing run queue latency... Hit Ctrl-C to end.\n^C\n     usecs               : count     distribution\n         0 -> 1          : 29       |*******                                 |\n         2 -> 3          : 146      |****************************************|\n         4 -> 7          : 120      |********************************        |\n         8 -> 15         : 43       |***********                             |\n        16 -> 31         : 4        |*                                       |\n        32 -> 63         : 3        |                                        |\n        64 -> 127        : 4        |*                                       |<\/code><\/pre>\n
\u3068\u308a\u3042\u3048\u305a\u3001\u3053\u306e\u3050\u3089\u3044\u3067\u3002\u307e\u305f\u5b9f\u969b\u306b\u9069\u7528\u3057\u305f\u4e8b\u4f8b\u306a\u3069\u304c\u3042\u308c\u3070\u7d39\u4ecb\u3057\u305f\u3044\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u524d\u56de\u306f eBPF \u3092\u5229\u7528\u3059\u308b\u305f\u3081\u306b bcc \u3092\u5c0e\u5165\u3057\u307e\u3057\u305f\u3002\u672c\u6765 bcc \u306f\u81ea\u5206\u3067\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u66f8\u304f\u3053\u3068\u304c\u524d\u63d0\u3067\u3059\u304c\u3001\u6a19\u6e96\u3067\u6dfb\u4ed8\u3055\u308c\u3066\u3044\u308b\u30c4\u30fc\u30eb\u7fa4\u3060\u3051\u3067\u3082\u304b\u306a\u308a\u9762\u767d\u3044\u3053\u3068\u304c\u308f\u304b\u308a\u307e\u3059\u3002\u305f\u3060\u6dfb\u4ed8\u3055\u308c\u3066\u3044\u308b\u30b3\u30de\u30f3\u30c9\u3060\u3051\u3067\u3082 1…<\/p>\n","protected":false},"author":1,"featured_media":16792,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_locale":"ja","_original_post":"16795","footnotes":""},"categories":[29],"tags":[725],"class_list":{"0":"post-16795","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-linux","8":"tag-bcc","9":"ja"},"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.skyarch.net\/blog\/wp-json\/wp\/v2\/posts\/16795","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.skyarch.net\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.skyarch.net\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.skyarch.net\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.skyarch.net\/blog\/wp-json\/wp\/v2\/comments?post=16795"}],"version-history":[{"count":3,"href":"https:\/\/www.skyarch.net\/blog\/wp-json\/wp\/v2\/posts\/16795\/revisions"}],"predecessor-version":[{"id":16808,"href":"https:\/\/www.skyarch.net\/blog\/wp-json\/wp\/v2\/posts\/16795\/revisions\/16808"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.skyarch.net\/blog\/wp-json\/wp\/v2\/media\/16792"}],"wp:attachment":[{"href":"https:\/\/www.skyarch.net\/blog\/wp-json\/wp\/v2\/media?parent=16795"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.skyarch.net\/blog\/wp-json\/wp\/v2\/categories?post=16795"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.skyarch.net\/blog\/wp-json\/wp\/v2\/tags?post=16795"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}