{"id":95774,"date":"2022-03-12T10:26:25","date_gmt":"2022-03-12T01:26:25","guid":{"rendered":"https:\/\/softantenna.com\/blog\/?p=95774"},"modified":"2022-03-12T10:26:25","modified_gmt":"2022-03-12T01:26:25","slug":"36-performance-down-new-spectre-bhi-patch","status":"publish","type":"post","link":"https:\/\/softantenna.com\/blog\/36-performance-down-new-spectre-bhi-patch\/","title":{"rendered":"\u6700\u65b0\u306eIntel CPU\u3067\u3082\u65b0\u3057\u3044Spectre BHI\u30d1\u30c3\u30c1\u3067\u6700\u592736%\u306e\u6027\u80fd\u4f4e\u4e0b\u304c\u767a\u751f"},"content":{"rendered":"<p><img decoding=\"async\" style=\"display:block; margin-left:auto; margin-right:auto;\" src=\"https:\/\/softantenna.com\/blog\/wp-content\/uploads\/2022\/03\/s_20220312_100202.jpg\" alt=\"S 20220312 100202\" title=\"s_20220312_100202.jpg\" border=\"0\" width=\"1265\" height=\"663\" \/><\/p>\n<p>\u30a2\u30e0\u30b9\u30c6\u30eb\u30c0\u30e0\u81ea\u7531\u5927\u5b66\u306e\u30b7\u30b9\u30c6\u30e0\u30fb\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30b0\u30eb\u30fc\u30d7\u300cVUSec\u300d\u304c\u3001Spectre v2\u304b\u3089\u6d3e\u751f\u3057\u305f\u65b0\u3057\u3044\u8106\u5f31\u6027\u300c<a href=\"https:\/\/www.vusec.net\/projects\/bhi-spectre-bhb\/\">BHI \/ Spectre-BHB<\/a>\u300d\u306b\u3064\u3044\u3066\u306e\u8a73\u7d30\u3092\u958b\u793a\u3002x86\u30d7\u30ed\u30bb\u30c3\u30b5\u5411\u3051\u306eLinux\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30d1\u30c3\u30c1\u3082\u540c\u65e5\u306b\u30ea\u30ea\u30fc\u30b9\u3055\u308c\u3001\u30d1\u30c3\u30c1\u9069\u7528\u5f8c\u306e\u30b7\u30b9\u30c6\u30e0\u3067\u6700\u592736%\u306e\u6027\u80fd\u4f4e\u4e0b\u304c\u767a\u751f\u3057\u305f\u3053\u3068\u5224\u660e\u3057\u3066\u3044\u307e\u3059(<a href=\"https:\/\/www.neowin.net\/news\/even-modern-intel-cpus-are-losing-up-to-36-performance-with-the-new-spectre-bhi-patch\/\">Neowin<\/a>)\u3002<\/p>\n<p>\u8106\u5f31\u6027\u306fIntel\u3068Arm\u306e\u4e21\u65b9\u306eCPU\u306b\u5f71\u97ff\u3092\u53ca\u307c\u3059\u3082\u306e\u306e\u3001AMD\u306eCPU\u306f\u5f71\u97ff\u3092\u53d7\u3051\u307e\u305b\u3093\u3002<\/p>\n<p>Spectre\u306e\u8106\u5f31\u6027\u306f\u3001\u4e00\u822c\u7684\u306b\u5206\u5c90\u4e88\u6e2c\u3084\u6295\u6a5f\u3092\u4f7f\u3063\u3066\u3044\u308bCPU\u3092\u60aa\u7528\u3059\u308b\u3082\u306e\u3067\u3059\u3002\u65b0\u3057\u3044\u8106\u5f31\u6027\u306f\u3001\u5206\u5c90\u5c65\u6b74\u30d0\u30c3\u30d5\u30a1(BHB)\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u306b\u3088\u308a\u3001Enhanced Indirect Branch Restricted Speculation\uff08EIBRS\uff09\u306e\u30cf\u30fc\u30c9\u30a6\u30a7\u30a2\u7de9\u548c\u7b56(ARM\u306e\u5834\u5408\u306fCSV2)\u3055\u3048\u56de\u907f\u3067\u304d\u308b\u3068\u6307\u6458\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u3053\u306e\u305f\u3081\u8106\u5f31\u6027\u306fSpectre-BHB \u307e\u305f\u306f Branch History Injection(BHI)\u3068\u547c\u3070\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>Linux 5.17\u30e1\u30a4\u30f3\u30e9\u30a4\u30f3\u30ab\u30fc\u30cd\u30eb\u306b\u5c0e\u5165\u3055\u308c\u305f\u30d1\u30c3\u30c1\u304c\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306b\u4e0e\u3048\u308b\u5f71\u97ff\u3092\u898b\u308b\u305f\u3081\u306b<a href=\"https:\/\/www.phoronix.com\/scan.php?page=article&item=spectre-bhi-retpoline\">Phoronix<\/a>\u304c\u30c6\u30b9\u30c8\u3092\u5b9f\u65bd\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>\u307e\u305a\u3001\u6700\u65b0\u306e\u7b2c12\u4e16\u4ee3Alder Lake-S Core i9-12900K\u3067\u306f\u3001Sockperf\u306e\u30b9\u30eb\u30fc\u30d7\u30c3\u30c8\u3067\u3001\u6700\u5927\u306726.7%\u306e\u6027\u80fd\u4f4e\u4e0b\u304c\u767a\u751f\u3057\u3001\u305d\u306e\u4ed6\u306e\u30c6\u30b9\u30c8\u3067\u30822\uff5e14.5%\u306e\u640d\u5931\u304c\u767a\u751f\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<p><img decoding=\"async\" style=\"display:block; margin-left:auto; margin-right:auto;\" src=\"https:\/\/softantenna.com\/blog\/wp-content\/uploads\/2022\/03\/1647006924_12900k_spectre_bhi_retpoline_perf_impact_source-_phoronix.jpeg\" alt=\"1647006924 12900k spectre bhi retpoline perf impact source phoronix\" title=\"1647006924_12900k_spectre_bhi_retpoline_perf_impact_(source-_phoronix).jpeg\" border=\"0\" width=\"1280\" height=\"1301\" \/><\/p>\n<p>\u7b2c11\u4e16\u4ee3Tiger Lake Core i7-1185G7\u30d7\u30ed\u30bb\u30c3\u30b5\u30fc\u3067\u3082\u30c6\u30b9\u30c8\u304c\u884c\u308f\u308c\u3001\u30d1\u30c3\u30c1\u304c\u9069\u7528\u3055\u308c\u3066\u3044\u306a\u3044\u30b7\u30b9\u30c6\u30e0\u3068\u6bd4\u8f03\u3059\u308b\u3068\u3001\u6700\u592735.6%\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u304c\u4f4e\u4e0b\u3057\u3066\u3044\u307e\u3059\u3002\u7b2c12\u4e16\u4ee3\u3088\u308a\u3082\u6027\u80fd\u306e\u4f4e\u4e0b\u7387\u306f\u5927\u304d\u304f\u3001\u30d1\u30c3\u30c1\u3092\u9069\u7528\u3057\u3066\u3044\u306a\u3044\u72b6\u614b\u3068\u6bd4\u8f03\u3059\u308b\u3068\u5168\u4f53\u3068\u3057\u30662%\u301c26.1%\u306e\u6027\u80fd\u4f4e\u4e0b\u304c\u767a\u751f\u3057\u3066\u3044\u308b\u3088\u3046\u3067\u3059\u3002<\/p>\n<p><img decoding=\"async\" style=\"display:block; margin-left:auto; margin-right:auto;\" src=\"https:\/\/softantenna.com\/blog\/wp-content\/uploads\/2022\/03\/1647006917_1185g7_spectre_bhi_retpoline_perf_impact_source-_phoronix.jpeg\" alt=\"1647006917 1185g7 spectre bhi retpoline perf impact source phoronix\" title=\"1647006917_1185g7_spectre_bhi_retpoline_perf_impact_(source-_phoronix).jpeg\" border=\"0\" width=\"1280\" height=\"1065\" \/><\/p>\n<p>VUSec\u306f\u3001Linux\u30ab\u30fc\u30cd\u30eb\u5185\u4eee\u60f3\u30de\u30b7\u30f3eBPF\u3092\u5229\u7528\u3057\u3001Intel\u306e\u6700\u65b0\u30d7\u30ed\u30bb\u30c3\u30b5\u3092\u60aa\u7528\u3057\u3066\u30ab\u30fc\u30cd\u30eb\u30e1\u30e2\u30ea\u3092\u6f0f\u6d29\u3055\u305b\u3001root\u30cf\u30c3\u30b7\u30e5\u30d1\u30b9\u30ef\u30fc\u30c9\u3092\u6f0f\u6d29\u3055\u305b\u308b\u6982\u5ff5\u5b9f\u8a3c\u52d5\u753b\u3092\u516c\u958b\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<p><iframe width=\"680\" height=\"383\" src=\"https:\/\/www.youtube.com\/embed\/537HUwV36ME\" frameborder=\"0\" allowfullscreen><\/iframe><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u30a2\u30e0\u30b9\u30c6\u30eb\u30c0\u30e0\u81ea\u7531\u5927\u5b66\u306e\u30b7\u30b9\u30c6\u30e0\u30fb\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30b0\u30eb\u30fc\u30d7\u300cVUSec\u300d\u304c\u3001Spectre v2\u304b\u3089\u6d3e\u751f\u3057\u305f\u65b0\u3057\u3044\u8106\u5f31\u6027\u300cBHI \/ Spectre-BHB\u300d\u306b\u3064\u3044\u3066\u306e\u8a73\u7d30\u3092\u958b\u793a\u3002x86\u30d7\u30ed\u30bb\u30c3\u30b5\u5411\u3051\u306eLinux [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":95775,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"swell_btn_cv_data":"","footnotes":""},"categories":[75],"tags":[531,37],"class_list":["post-95774","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-software","tag-intel","tag-linux"],"_links":{"self":[{"href":"https:\/\/softantenna.com\/blog\/wp-json\/wp\/v2\/posts\/95774","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/softantenna.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/softantenna.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/softantenna.com\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/softantenna.com\/blog\/wp-json\/wp\/v2\/comments?post=95774"}],"version-history":[{"count":0,"href":"https:\/\/softantenna.com\/blog\/wp-json\/wp\/v2\/posts\/95774\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/softantenna.com\/blog\/wp-json\/wp\/v2\/media\/95775"}],"wp:attachment":[{"href":"https:\/\/softantenna.com\/blog\/wp-json\/wp\/v2\/media?parent=95774"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/softantenna.com\/blog\/wp-json\/wp\/v2\/categories?post=95774"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/softantenna.com\/blog\/wp-json\/wp\/v2\/tags?post=95774"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}