{"id":3024,"date":"2026-04-09T19:43:00","date_gmt":"2026-04-09T10:43:00","guid":{"rendered":"https:\/\/bokumin.org\/blog\/?p=3024"},"modified":"2026-04-09T17:15:35","modified_gmt":"2026-04-09T08:15:35","slug":"openbsd%e3%81%a7%e5%ae%9f%e9%9a%9b%e3%81%aec-state%e3%82%92%e7%a2%ba%e8%aa%8d%e3%81%99%e3%82%8b%ef%bc%88mwait%ef%bc%89","status":"publish","type":"post","link":"https:\/\/bokumin.org\/blog\/2026\/04\/09\/openbsd%e3%81%a7%e5%ae%9f%e9%9a%9b%e3%81%aec-state%e3%82%92%e7%a2%ba%e8%aa%8d%e3%81%99%e3%82%8b%ef%bc%88mwait%ef%bc%89\/","title":{"rendered":"OpenBSD\u3067\u5b9f\u969b\u306eC-state\u3092\u78ba\u8a8d\u3059\u308b\uff08MWAIT\uff09"},"content":{"rendered":"\n<p><strong>Determining C-states using MWAIT on OpenBSD<\/strong><\/p>\n\n\n\n<p>\u30d5\u30a1\u30a4\u30a2\u30a6\u30a9\u30fc\u30eb\u30b5\u30fc\u30d0\u306eOS\u3092OpenBSD\u306b\u5909\u3048\u307e\u3057\u305f\u3002\u4ee5\u524d\u306eFreeBSD\u3092\u305d\u306e\u307e\u307e\u4f7f\u3063\u3066\u3082\u826f\u304b\u3063\u305f\u306e\u3067\u3059\u304c\u3001PF\u306e\u307f\u4f7f\u7528\u30fbQAT\u3082\/dev\/random\u306e\u307f\u3068\u306a\u3063\u3066\u3044\u305f\u306e\u3067\u571f\u65e5\u3092\u4f7f\u3063\u3066\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u30fb\u8a2d\u5b9a\u3057\u76f4\u3057\u307e\u3057\u305f\u3002<br>\u4eca\u56de\u306f\u305d\u306eOpenBSD\u3067C-state\u3092\u78ba\u8a8d\u3059\u308b\u65b9\u6cd5\u3068\u3044\u3046\u8a18\u4e8b\u306b\u306a\u3063\u3066\u304a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>\u306f\u3058\u3081\u306b<\/strong><\/h2>\n\n\n\n<p>OpenBSD\u306fCPU\u306e\u7701\u96fb\u529b\u7ba1\u7406\u306b\u3064\u3044\u3066\u3001FreeBSD\u306e hw.acpi.cpu.cx_lowest \u306e\u3088\u3046\u306a\u30e6\u30fc\u30b6\u30fc\u304c\u624b\u52d5\u3067\u3044\u3058\u308bsysctl \u9805\u76ee\u306f\u5b58\u5728\u305b\u305a\u3001\u30ab\u30fc\u30cd\u30eb\uff08acpicpu\uff09\u304cACPI\u30c6\u30fc\u30d6\u30eb\u304b\u3089\u60c5\u5831\u3092\u53d6\u5f97\u3057\u3066\u81ea\u52d5\u7684\u306b\u7ba1\u7406\u3059\u308b\u3088\u3046\u306b\u306a\u3063\u3066\u3044\u307e\u3059\u3002<br>\u4eca\u56de\u3001\u4f4e\u6d88\u8cbb\u96fb\u529b\u30b5\u30fc\u30d0\u30fc\u3092\u69cb\u7bc9\u3059\u308b\u969b\u306b\u3001\u3053\u306eCPU\u304c\u672c\u5f53\u306bC-state\u306b\u5165\u3063\u3066\u3044\u308b\u306e\u304b\uff1f\u304c\u500b\u4eba\u7684\u306b\u6c17\u306b\u306a\u3063\u3066\u3044\u307e\u3057\u305f\u3002\u4eca\u56de\u306fAtom C3558\uff08Denverton\uff09\u3092\u642d\u8f09\u3057\u305f\u30dc\u30fc\u30c9\u3092\u4f8b\u306b\u3001OpenBSD\u304c\u8a8d\u8b58\u3057\u3066\u3044\u308bC-state\u306e\u5b9f\u614b\u3092MWAIT\u547d\u4ee4\u304b\u3089\u78ba\u8a8d\u3057\u3066\u3044\u304d\u305f\u3044\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>\u5b9f\u884c\u3057\u305f\u74b0\u5883<\/strong><\/h2>\n\n\n\n<p>OS: OpenBSD 7.8 amd64<br>MB: Quanmax Inc. MITX-DNV<br>CPU: Atom C3558 (4\u30b3\u30a2) @ 2.200GHz<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>OpenBSD\u306eC-state\u8a8d\u8b58<\/strong><\/h2>\n\n\n\n<p>OpenBSD\u3067\u306f\u3001\u8d77\u52d5\u6642\u306e dmesg \u3067 acpicpu \u30c9\u30e9\u30a4\u30d0\u306e\u8a8d\u8b58\u72b6\u6cc1\u3092\u78ba\u8a8d\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<div class=\"wp-block-kevinbatdorf-code-block-pro cbp-has-line-numbers\" data-code-block-pro-font-family=\"\" style=\"font-size:.875rem;--cbp-line-number-color:#D4D4D4;--cbp-line-number-width:calc(1 * 0.6 * .875rem);line-height:1.25rem;--cbp-tab-width:2;tab-size:var(--cbp-tab-width, 2)\"><span role=\"button\" tabindex=\"0\" style=\"color:#D4D4D4;display:none\" aria-label=\"Copy\" class=\"code-block-pro-copy-button\"><pre class=\"code-block-pro-copy-button-pre\" aria-hidden=\"true\"><textarea class=\"code-block-pro-copy-button-textarea\" tabindex=\"-1\" aria-hidden=\"true\" readonly>acpicpu0 at acpi0: C2(10@50 mwait.1@0x21), C1(1000@1 mwait.1@0x1), PSS\nacpicpu1 at acpi0: C2(10@50 mwait.1@0x21), C1(1000@1 mwait.1@0x1), PSS\n...<\/textarea><\/pre><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" style=\"width:24px;height:24px\" fill=\"none\" viewBox=\"0 0 24 24\" stroke=\"currentColor\" stroke-width=\"2\"><path class=\"with-check\" stroke-linecap=\"round\" stroke-linejoin=\"round\" d=\"M9 5H7a2 2 0 00-2 2v12a2 2 0 002 2h10a2 2 0 002-2V7a2 2 0 00-2-2h-2M9 5a2 2 0 002 2h2a2 2 0 002-2M9 5a2 2 0 012-2h2a2 2 0 012 2m-6 9l2 2 4-4\"><\/path><path class=\"without-check\" stroke-linecap=\"round\" stroke-linejoin=\"round\" d=\"M9 5H7a2 2 0 00-2 2v12a2 2 0 002 2h10a2 2 0 002-2V7a2 2 0 00-2-2h-2M9 5a2 2 0 002 2h2a2 2 0 002-2M9 5a2 2 0 012-2h2a2 2 0 012 2\"><\/path><\/svg><\/span><pre class=\"shiki dark-plus\" style=\"background-color: #1E1E1E\" tabindex=\"0\"><code><span class=\"line\"><span style=\"color: #DCDCAA\">acpicpu0<\/span><span style=\"color: #D4D4D4\"> <\/span><span style=\"color: #CE9178\">at<\/span><span style=\"color: #D4D4D4\"> <\/span><span style=\"color: #CE9178\">acpi0:<\/span><span style=\"color: #D4D4D4\"> <\/span><span style=\"color: #CE9178\">C2<\/span><span style=\"color: #D4D4D4\">(<\/span><span style=\"color: #DCDCAA\">10@50<\/span><span style=\"color: #D4D4D4\"> <\/span><span style=\"color: #CE9178\">mwait.1@0x21<\/span><span style=\"color: #D4D4D4\">)<\/span><span style=\"color: #CE9178\">,<\/span><span style=\"color: #D4D4D4\"> <\/span><span style=\"color: #CE9178\">C1<\/span><span style=\"color: #D4D4D4\">(<\/span><span style=\"color: #DCDCAA\">1000@1<\/span><span style=\"color: #D4D4D4\"> <\/span><span style=\"color: #CE9178\">mwait.1@0x1<\/span><span style=\"color: #D4D4D4\">)<\/span><span style=\"color: #CE9178\">,<\/span><span style=\"color: #D4D4D4\"> <\/span><span style=\"color: #CE9178\">PSS<\/span><\/span>\n<span class=\"line\"><span style=\"color: #DCDCAA\">acpicpu1<\/span><span style=\"color: #D4D4D4\"> <\/span><span style=\"color: #CE9178\">at<\/span><span style=\"color: #D4D4D4\"> <\/span><span style=\"color: #CE9178\">acpi0:<\/span><span style=\"color: #D4D4D4\"> <\/span><span style=\"color: #CE9178\">C2<\/span><span style=\"color: #D4D4D4\">(<\/span><span style=\"color: #DCDCAA\">10@50<\/span><span style=\"color: #D4D4D4\"> <\/span><span style=\"color: #CE9178\">mwait.1@0x21<\/span><span style=\"color: #D4D4D4\">)<\/span><span style=\"color: #CE9178\">,<\/span><span style=\"color: #D4D4D4\"> <\/span><span style=\"color: #CE9178\">C1<\/span><span style=\"color: #D4D4D4\">(<\/span><span style=\"color: #DCDCAA\">1000@1<\/span><span style=\"color: #D4D4D4\"> <\/span><span style=\"color: #CE9178\">mwait.1@0x1<\/span><span style=\"color: #D4D4D4\">)<\/span><span style=\"color: #CE9178\">,<\/span><span style=\"color: #D4D4D4\"> <\/span><span style=\"color: #CE9178\">PSS<\/span><\/span>\n<span class=\"line\"><span style=\"color: #DCDCAA\">...<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n<p>\u3053\u3053\u3067\u898b\u308b\u3079\u304d\u306f<strong> C2(10@50 mwait.1@0x21) <\/strong>\u3068\u3044\u3046\u8868\u8a18\u3067\u3059\u3002<br>ACPI\u4e0a\u306e\u540d\u79f0\u306fC2\u3067\u3059\u304c\u3001\u304b\u3063\u3053\u5185\u306e mwait.1@0x21\u3053\u305d\u304c\u3001CPU\u306b\u5bfe\u3057\u3066\u300c\u3069\u306e\u7a0b\u5ea6\u6df1\u304f\u7720\u308b\u304b\u300d\u3092\u6307\u793a\u3059\u308b\u7269\u7406\u7684\u306a\u547d\u4ee4\u5024\uff08MWAIT\u30b5\u30d6\u30b9\u30c6\u30fc\u30c8\uff09\u3068\u306a\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>MWAIT\u30b5\u30d6\u30b9\u30c6\u30fc\u30c8\u3092\u8aad\u307f\u89e3\u304f<\/strong><\/h2>\n\n\n\n<p>Intel\u30d7\u30ed\u30bb\u30c3\u30b5\u306b\u304a\u3044\u3066\u3001MWAIT\u547d\u4ee4\u306b\u6e21\u3059\u5f15\u6570\uff08\u30d2\u30f3\u30c8\u5024\uff09\u306e\u4e0a\u4f4d\u30cb\u30d6\u30eb\uff084\u30d3\u30c3\u30c8\uff09\u306f\u3001\u6982\u306d\u4ee5\u4e0b\u306e\u72b6\u614b\u306b\u5bfe\u5fdc\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td>\u30d2\u30f3\u30c8\u5024(\u4e0a\u4f4d)<\/td><td>\u5bfe\u5fdc\u3059\u308bIntel\u5b9f\u88c5\u306eC-state<\/td><\/tr><tr><td>0x0x<\/td><td>C1-state<\/td><\/tr><tr><td>0x1x<\/td><td>C3-state<\/td><\/tr><tr><td>0x2x<\/td><td>C6-state<\/td><\/tr><tr><td>0x3x<\/td><td>C7-state<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>\u4eca\u56de\u306e\u74b0\u5883\u3067\u8868\u793a\u3055\u308c\u3066\u3044\u308b\u306e\u306f 0x21 \u3067\u3059\u3002\u3064\u307e\u308a\u3001OS\u4e0a\u306e\u8868\u8a18\u306f\u300cC2\u300d\u3067\u3042\u3063\u3066\u3082\u3001\u30cf\u30fc\u30c9\u30a6\u30a7\u30a2\u306b\u5bfe\u3057\u3066\u306f <strong>\u300cC6\u7cfb\u306e\u30b5\u30d6\u30b9\u30c6\u30fc\u30c81\u300d<\/strong> \u3092\u8981\u6c42\u3057\u3066\u3044\u308b\u3053\u3068\u304c\u308f\u304b\u308a\u307e\u3059\u3002\u307e\u305f\u3001C1\u304cC3\u306b\u76f8\u5f53\u3059\u308b\u3053\u3068\u3082\u898b\u3066\u53d6\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Denverton (Atom C3558) \u306e\u5834\u5408<\/strong><\/h2>\n\n\n\n<p>Linux\u30ab\u30fc\u30cd\u30eb\u306e intel_idle \u30c9\u30e9\u30a4\u30d0\u7b49\u306e\u5b9f\u88c5\u3092\u78ba\u8a8d\u3059\u308b\u3068\u3001Denverton\u4e16\u4ee3\u306eC-state\u30de\u30c3\u30d7\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u306a\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<div class=\"wp-block-kevinbatdorf-code-block-pro cbp-has-line-numbers\" data-code-block-pro-font-family=\"\" style=\"font-size:.875rem;--cbp-line-number-color:#D4D4D4;--cbp-line-number-width:calc(1 * 0.6 * .875rem);line-height:1.25rem;--cbp-tab-width:2;tab-size:var(--cbp-tab-width, 2)\"><span role=\"button\" tabindex=\"0\" style=\"color:#D4D4D4;display:none\" aria-label=\"Copy\" class=\"code-block-pro-copy-button\"><pre class=\"code-block-pro-copy-button-pre\" aria-hidden=\"true\"><textarea class=\"code-block-pro-copy-button-textarea\" tabindex=\"-1\" aria-hidden=\"true\" readonly>    MWAIT 0x00: C1\n    MWAIT 0x01: C1E\n    MWAIT 0x20: C6\n    MWAIT 0x21: C6\u3000\u2190\u672c\u74b0\u5883\u306e\u5834\u5408<\/textarea><\/pre><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" style=\"width:24px;height:24px\" fill=\"none\" viewBox=\"0 0 24 24\" stroke=\"currentColor\" stroke-width=\"2\"><path class=\"with-check\" stroke-linecap=\"round\" stroke-linejoin=\"round\" d=\"M9 5H7a2 2 0 00-2 2v12a2 2 0 002 2h10a2 2 0 002-2V7a2 2 0 00-2-2h-2M9 5a2 2 0 002 2h2a2 2 0 002-2M9 5a2 2 0 012-2h2a2 2 0 012 2m-6 9l2 2 4-4\"><\/path><path class=\"without-check\" stroke-linecap=\"round\" stroke-linejoin=\"round\" d=\"M9 5H7a2 2 0 00-2 2v12a2 2 0 002 2h10a2 2 0 002-2V7a2 2 0 00-2-2h-2M9 5a2 2 0 002 2h2a2 2 0 002-2M9 5a2 2 0 012-2h2a2 2 0 012 2\"><\/path><\/svg><\/span><pre class=\"shiki dark-plus\" style=\"background-color: #1E1E1E\" tabindex=\"0\"><code><span class=\"line\"><span style=\"color: #D4D4D4\">    <\/span><span style=\"color: #DCDCAA\">MWAIT<\/span><span style=\"color: #D4D4D4\"> <\/span><span style=\"color: #B5CEA8\">0x00<\/span><span style=\"color: #CE9178\">:<\/span><span style=\"color: #D4D4D4\"> <\/span><span style=\"color: #CE9178\">C1<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D4D4D4\">    <\/span><span style=\"color: #DCDCAA\">MWAIT<\/span><span style=\"color: #D4D4D4\"> <\/span><span style=\"color: #B5CEA8\">0x01<\/span><span style=\"color: #CE9178\">:<\/span><span style=\"color: #D4D4D4\"> <\/span><span style=\"color: #CE9178\">C1E<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D4D4D4\">    <\/span><span style=\"color: #DCDCAA\">MWAIT<\/span><span style=\"color: #D4D4D4\"> <\/span><span style=\"color: #B5CEA8\">0x20<\/span><span style=\"color: #CE9178\">:<\/span><span style=\"color: #D4D4D4\"> <\/span><span style=\"color: #CE9178\">C6<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D4D4D4\">    <\/span><span style=\"color: #DCDCAA\">MWAIT<\/span><span style=\"color: #D4D4D4\"> <\/span><span style=\"color: #B5CEA8\">0x21<\/span><span style=\"color: #CE9178\">:<\/span><span style=\"color: #D4D4D4\"> <\/span><span style=\"color: #CE9178\">C6\u3000\u2190\u672c\u74b0\u5883\u306e\u5834\u5408<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n<p>\u3053\u306e\u30d7\u30ed\u30bb\u30c3\u30b5\u306f\u6700\u5927\u3067C6\u307e\u3067\u3057\u304b\u5bfe\u5fdc\u3057\u3066\u3044\u306a\u3044\u305f\u3081\u3001\u3053\u306e 0x21 \u304c\u51fa\u3066\u3044\u308b\u6642\u70b9\u3067\u3001OpenBSD\u306f\u30cf\u30fc\u30c9\u30a6\u30a7\u30a2\u304c\u6301\u3064<strong>\u6700\u5927\u306e\u7701\u96fb\u529b\u72b6\u614b\u3092\u6b63\u3057\u304f\u6d3b\u7528\u3067\u304d\u3066\u3044\u308b<\/strong>\u3068\u5224\u65ad\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>MWAIT\u5024\u306e\u8aad\u307f\u65b9\u306e\u6ce8\u610f\u70b9<\/strong><\/h2>\n\n\n\n<p>MWAIT\u30d2\u30f3\u30c8\u306e\u8aad\u307f\u65b9\u306b\u3064\u3044\u3066\u306e\u88dc\u8db3\u3067\u3059\u304c\u3001Intel\u306e\u30de\u30cb\u30e5\u30a2\u30eb\u306b\u3088\u308c\u3070\u3001\u300cMWAIT\u62e1\u5f35\u3067\u5b9a\u7fa9\u3055\u308c\u305fC-state\u306f\u30d7\u30ed\u30bb\u30c3\u30b5\u56fa\u6709\u306e\u3082\u306e\u3067\u3042\u308a\u3001ACPI C-state\u3068\u306f\u76f4\u63a5\u4e00\u81f4\u3057\u306a\u3044\u300d\u3068\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u307e\u305f\u3001Linux\u30ab\u30fc\u30cd\u30eb\u306e\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u3067\u3082\u3001\u30d2\u30f3\u30c8\u5024\u306e\u610f\u5473\u306f\u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\u306b\u4f9d\u5b58\u3059\u308b\u5834\u5408\u304c\u3042\u308b\u3068\u6ce8\u610f\u66f8\u304d\u304c\u3042\u308a\u307e\u3059\u3002(<a href=\"https:\/\/www.kernel.org\/doc\/html\/latest\/admin-guide\/pm\/cpuidle.html\">Linux Kernel Documentation<\/a>)<\/p>\n\n\n\n<p>\u73fe\u5b9f\u7684\u306b\u306f\u3001\u591a\u304f\u306eCore\u7cfb\u30fbXeon\u7cfb\u30d7\u30ed\u30bb\u30c3\u30b5\u3067\u306f\u4e0a\u8a18\u306e\u4e0a\u4f4d\u30cb\u30d6\u30eb\u898f\u5247\u304c\u9069\u7528\u3055\u308c\u3066\u3044\u307e\u3059\u304c\u3001\u6700\u65b0\u306eAtom\u7cfb\uff08Sierra Forest\u7b49\uff09\u3067\u306f\u4f8b\u5916\u3082\u51fa\u59cb\u3081\u3066\u3044\u307e\u3059\u3002<br>\u53b3\u5bc6\u306a\u78ba\u8a8d\u304c\u5fc5\u8981\u306a\u5834\u5408\u306f\u3001\u5404CPU\u4e16\u4ee3\u306e\u30c7\u30fc\u30bf\u30b7\u30fc\u30c8\u3084\u3001Linux\u306e intel_idle.c \u306e\u30bd\u30fc\u30b9\u30b3\u30fc\u30c9\u306b\u3042\u308b\u30c6\u30fc\u30d6\u30eb\u3068\u7167\u3089\u3057\u5408\u308f\u305b\u308b\u306e\u304c\u6700\u3082\u78ba\u5b9f\u3067\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>\u307e\u3068\u3081<\/strong><\/h2>\n\n\n\n<p>OpenBSD\u3067CPU\u306f\u5b9f\u969b\u3069\u308c\u304f\u3089\u3044\u306eC-state\u3092\u3057\u3066\u3044\u308b\u3093\u3060\u308d\u3046\u3068\u601d\u3063\u305f\u3068\u304d\u306f\u3001 dmesg \u306e mwait \u5024\u3092\u78ba\u8a8d\u3059\u308c\u3070\u5927\u534a\u304c\u5224\u65ad\u53ef\u80fd\u3067\u3059\u3002<br>\u4e0a\u4f4d\u30cb\u30d6\u30eb\u304c 0x2 \u3084 0x3 \u306a\u3089\u3001\u5341\u5206\u306b\u6df1\u3044\u3068\u3053\u308d\u307e\u3067\u843d\u3061\u3066\u304a\u308a\u3001\u9006\u306b<strong>\uff01\u30d7\u30ec\u30d5\u30a3\u30c3\u30af\u30b9<\/strong>\u306a\u3069\u304c\u4ed8\u3044\u3066\u3044\u308b\u5834\u5408\u306fBios\u306a\u3069\u3067\u30b9\u30ad\u30c3\u30d7\u3055\u308c\u3066\u3044\u308b\u72b6\u614b\u3060\u3068\u3044\u3046\u3053\u3068\u3067\u3059\u3002<\/p>\n\n\n\n<p>\u307e\u305f\u3001OpenBSD 7.6\u4ee5\u964d\u3067\u306f\u3001suspend-to-idle\u6642\u306b\u3082\u53ef\u80fd\u306a\u9650\u308a\u6df1\u3044C-state\u3092\u9078\u629e\u3059\u308b\u3088\u3046\u6539\u5584\u304c\u9032\u3093\u3067\u304a\u308a\u3001\u30e6\u30fc\u30b6\u30fc\u304c\u610f\u8b58\u305b\u305a\u3068\u3082\u6700\u9069\u306a\u7701\u96fb\u529b\u304c\u5f97\u3089\u308c\u308b\u3088\u3046\u306b\u306a\u3063\u3066\u3044\u307e\u3059\u3002\u8a2d\u5b9a\u9805\u76ee\u304c\u5c11\u306a\u3044\u306e\u306f\u3001\u305d\u308c\u3060\u3051OS\u5074\u304c\u8ce2\u304f\u51e6\u7406\u3057\u3066\u3044\u308b\u8a3c\u62e0\u3060\u3068\u601d\u3044\u307e\u3057\u305f\u3002<\/p>\n\n\n\n<p>\u304a\u308f\u308a<\/p>\n\n\n\n<p><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u53c2\u8003URL<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/www.intel.com\/content\/www\/us\/en\/developer\/articles\/technical\/intel-sdm.html\" target=\"_blank\" rel=\"noreferrer noopener\">Intel\u00ae 64 and IA-32 Architectures Software Developer&#8217;s Manual<\/a> (Volume 2B: MWAIT instruction)<\/li>\n\n\n\n<li><a href=\"https:\/\/github.com\/torvalds\/linux\/blob\/master\/drivers\/idle\/intel_idle.c\" target=\"_blank\" rel=\"noreferrer noopener\">github: Linux Kernel Source: intel_idle.c<\/a> (Denverton C-states definition)<\/li>\n\n\n\n<li><a href=\"https:\/\/www.kernel.org\/doc\/html\/latest\/admin-guide\/pm\/cpuidle.html\" target=\"_blank\" rel=\"noreferrer noopener\">Linux Kernel Documentation: CPU Idle Time Management<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/www.openbsd.org\/plus76.html\" target=\"_blank\" rel=\"noreferrer noopener\">OpenBSD 7.6 Release Notes<\/a> (Improved C-state selection for acpicpu)<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Determining C-states using MWAIT on OpenBSD \u30d5\u30a1\u30a4\u30a2\u30a6\u30a9\u30fc\u30eb\u30b5\u30fc\u30d0\u306eOS\u3092OpenBSD\u306b\u5909\u3048\u307e\u3057\u305f\u3002\u4ee5\u524d\u306eFreeBSD\u3092\u305d\u306e\u307e\u307e\u4f7f\u3063\u3066\u3082\u826f\u304b\u3063\u305f\u306e\u3067\u3059\u304c\u3001PF\u306e\u307f\u4f7f\u7528\u30fbQA [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"cybocfi_hide_featured_image":"","footnotes":""},"categories":[212,228],"tags":[230,229,231],"class_list":["post-3024","post","type-post","status-publish","format-standard","hentry","category-cpu","category-openbsd","tag-acpicpu","tag-c-state","tag-dmesg"],"_links":{"self":[{"href":"https:\/\/bokumin.org\/blog\/wp-json\/wp\/v2\/posts\/3024","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/bokumin.org\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/bokumin.org\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/bokumin.org\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/bokumin.org\/blog\/wp-json\/wp\/v2\/comments?post=3024"}],"version-history":[{"count":7,"href":"https:\/\/bokumin.org\/blog\/wp-json\/wp\/v2\/posts\/3024\/revisions"}],"predecessor-version":[{"id":3036,"href":"https:\/\/bokumin.org\/blog\/wp-json\/wp\/v2\/posts\/3024\/revisions\/3036"}],"wp:attachment":[{"href":"https:\/\/bokumin.org\/blog\/wp-json\/wp\/v2\/media?parent=3024"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/bokumin.org\/blog\/wp-json\/wp\/v2\/categories?post=3024"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/bokumin.org\/blog\/wp-json\/wp\/v2\/tags?post=3024"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}