{"id":517,"date":"2021-09-17T02:00:46","date_gmt":"2021-09-16T18:00:46","guid":{"rendered":"https:\/\/blog.cauchyschwarz.com\/?p=517"},"modified":"2021-09-17T02:00:50","modified_gmt":"2021-09-16T18:00:50","slug":"spectre-meltdown","status":"publish","type":"post","link":"https:\/\/blog.cauchyschwarz.com\/?p=517","title":{"rendered":"Spectre Meltdown"},"content":{"rendered":"\n<h1 class=\"wp-block-heading\">Spectre &amp; Meltdown Checker<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/github.com\/speed47\/spectre-meltdown-checker\">https:\/\/github.com\/speed47\/spectre-meltdown-checker<\/a><\/p>\n\n\n\n<h1 class=\"wp-block-heading\">Spectre &amp; Meltdown\u7684\u5f71\u54cd<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e3a\u4e86\u4fee\u590dSpectre\u548cMeltdown\u7684\u5b89\u5168\u95ee\u9898\uff0cLinux\u4f1a\u4f7f\u7528kernel pagetable isolation(kpti)\u7b49\u6280\u672f\uff0c\u800c\u8fd9\u53ef\u80fd\u4f1a\u9020\u6210\u6027\u80fd\u4e0a\u7684\u660e\u663e\u4e0b\u964d\u3002\u5982\u679c\u5e76\u4e0d\u662f\u7279\u522b\u5728\u610fSpectre\u548cMeltdown\u7684\u5b89\u5168\u98ce\u9669\uff0c\u53ef\u4ee5\u8003\u8651disable\u8fd9\u4e9b\u5b89\u5168\u63aa\u65bd\u3002<br>disable\u7684\u65b9\u6cd5\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>\u5728\u7f16\u8bd1\u5185\u6838\u65f6\u4e0d\u8981\u52fe\u9009\u8fd9\u4e9b\u7279\u6027<\/li><li>\u5728Linux\u5185\u6838\u7684\u542f\u52a8\u53c2\u6570\u91cc\u8bbe\u7f6e\u5173\u95ed\u8fd9\u4e9b\u7279\u6027<br>https:\/\/www.stevenrombauts.be\/2018\/02\/how-to-disable-page-table-isolation-on-ubuntu-for-benchmarking\/<br>\u5148\u5982\u4e0a\u9762\u94fe\u63a5\u6240\u8ff0\uff0c\u901a\u8fc7\u67e5\u770b\/boot\/config-xxx\u6587\u4ef6\u786e\u8ba4\u5185\u6838\u652f\u6301pti\u7279\u6027\uff0c\u7136\u540e\u4fee\u6539\/etc\/default\/grub\u6587\u4ef6(\u9700\u8981\u8bf4\u660e\u7684\u662f\uff0c\u6839\u636e\u672c\u4eba\u7684\u5de5\u4f5c\u7ecf\u9a8c\u662f\u76f4\u63a5\u6539\u7684\/boot\/grub\/grub.cfg\u8fd9\u4e2a\u6587\u4ef6\u91cc\u7684\u542f\u52a8\u53c2\u6570\uff0c\u800c\u4e0d\u662f\/etc\/default\/grub\u8fd9\u4e2a\u6587\u4ef6)\uff0c\u5728\u542f\u52a8\u53c2\u6570\u91cc\u52a0\u4e0a<code>pti=off<\/code>\u3002<br>\u4f5c\u4e3a\u53c2\u8003\uff0c\u53ef\u4ee5\u6dfb\u52a0\u5982\u4e0b\u7684\u5185\u6838\u542f\u52a8\u53c2\u6570\uff1a<code>pti=off spectre_v2=off l1tf=off nospec_store_bypass_disable no_stf_barrier<\/code>\u3002<\/li><\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">\u6bd4\u8f83\u5f00\u542fKPTI\u4e0e\u4e0d\u5f00\u542f\u7684\u6548\u679c\uff1a<br>https:\/\/github.com\/brendangregg\/Misc\/tree\/master\/s1bench<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Spectre &amp; Meltdown Checker https:\/\/github.com\/speed47\/spectre-meltdown-checker Spectre &amp; Mel&#46;&#46;&#46;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[10],"tags":[37],"class_list":["post-517","post","type-post","status-publish","format-standard","hentry","category-10","tag-kernel"],"_links":{"self":[{"href":"https:\/\/blog.cauchyschwarz.com\/index.php?rest_route=\/wp\/v2\/posts\/517","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.cauchyschwarz.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.cauchyschwarz.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.cauchyschwarz.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.cauchyschwarz.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=517"}],"version-history":[{"count":1,"href":"https:\/\/blog.cauchyschwarz.com\/index.php?rest_route=\/wp\/v2\/posts\/517\/revisions"}],"predecessor-version":[{"id":518,"href":"https:\/\/blog.cauchyschwarz.com\/index.php?rest_route=\/wp\/v2\/posts\/517\/revisions\/518"}],"wp:attachment":[{"href":"https:\/\/blog.cauchyschwarz.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=517"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.cauchyschwarz.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=517"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.cauchyschwarz.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=517"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}