{"id":127029,"date":"2020-05-29T00:33:29","date_gmt":"2020-05-28T16:33:29","guid":{"rendered":"http:\/\/4563.org\/?p=127029"},"modified":"2020-05-29T00:33:29","modified_gmt":"2020-05-28T16:33:29","slug":"%e5%85%b3%e4%ba%8e-perf-stat-%e7%9a%84-cycles","status":"publish","type":"post","link":"http:\/\/4563.org\/?p=127029","title":{"rendered":"\u5173\u4e8e perf stat \u7684 cycles"},"content":{"rendered":"<div>\n<div>\n<div>\n<h1>                  \u5173\u4e8e perf stat \u7684 cycles               <\/h1>\n<p> <\/p>\n<div>\n<div> <span>\u8cc7\u6df1\u5927\u4f6c : czhou <\/span>  <span><i><\/i> 9<\/span> <\/div>\n<div> <\/div>\n<\/p><\/div>\n<\/p><\/div>\n<\/p><\/div>\n<div isfirst=\"1\"> <\/p>\n<p>\u6700\u8fd1\u5728\u4e24\u53f0\u670d\u52a1\u5668\u4e0a\u7ebf\u4e86\u4e00\u4e2a\u7a0b\u5e8f\uff0c\u76f8\u540c\u7684 cpu\uff0c\u90fd\u662f centos7\uff0c\u90fd\u6ca1\u6709 cpufreq governor\uff0c\u4f46\u662f\u4e00\u4e2a\u7528 perf stat \u6293\u5230\u7684 cycles \u53ea\u80fd\u8fbe\u5230\u57fa\u51c6\u9891\u7387\uff0c\u800c\u53e6\u5916\u4e00\u904d\u80fd\u8fbe\u5230\u6700\u9ad8\u7684\u777f\u9891\uff0c\u4e24\u53f0\u673a\u5668\u90fd\u6bd4\u8f83\u7a7a\u95f2\uff0c\u53ef\u4ee5\u8ba4\u4e3a\u8fd8\u6709\u5927\u91cf\u95f2\u7f6e\u8d44\u6e90\uff0c\u95f2\u7f6e\u6709\u70b9\u4e0d\u5927\u7406\u89e3\u4e3a\u4ec0\u4e48\u4f1a\u6709\u8fd9\u6837\u7684\u533a\u522b\u3002<\/p>\n<p>\u4e3a\u4e86\u8bf4\u660e\u95ee\u9898\uff0c\u7528\u670d\u52a1\u5668 1 \u4ee3\u66ff\u6709\u95ee\u9898\u7684\uff0c\u670d\u52a1\u5668 2 \u4ee3\u66ff\u6b63\u5e38\u8fd0\u884c\u7684\u3002<\/p>\n<p>\u4e3a\u4e86\u6392\u9664 cpu \u8fc1\u79fb\u7684\u95ee\u9898\uff0c\u5728\u670d\u52a1\u5668 1 \u4e0a\u6dfb\u52a0\u4e86 cpu binding\uff0c\u7ed3\u679c\u57fa\u672c\u6ca1\u5dee\u522b\uff0c\u4e3a\u4e86\u6392\u9664 io \u7684\u5dee\u5f02\uff0c\u7528 tmpfs \u76f4\u63a5\u63a5\u7ba1\u4e86\u670d\u52a1\u5668 1 \u7684 io \u64cd\u4f5c\uff0c\u73b0\u5728\u670d\u52a1\u5668 1 \u7528 perf \u6293\u4ecd\u7136\u8dd1\u5728\u57fa\u9891\uff0c\u4e0d\u77e5\u9053\u6709\u540c\u5b66\u6709\u76f8\u5173\u7ecf\u9a8c\u6ca1\uff0c\u6c42\u6559\u3002<\/p>\n<p>\u975e\u5e38\u611f\u8c22\u3002<\/p>\n<\/p><\/div>\n<div> <b>\u5927\u4f6c\u6709\u8a71\u8aaa<\/b> (<span>2<\/span>)        <\/div>\n<div> <\/div>\n<\/p><\/div>\n<\/p><\/div>\n<ul>\n<li data-pid=\"2055330\" data-uid=\"2\">\n<div>\n<div>\n<div> <span>\u8cc7\u6df1\u5927\u4f6c : secondwtq <\/span>  <\/div>\n<div> <i title=\"\u5f15\u7528\"><\/i>  <span>          <\/span> <\/div>\n<\/p><\/div>\n<div>                                                             bios \u6ca1\u4f5c\u5996\u4e48                                                            <\/div>\n<\/p><\/div>\n<\/li>\n<li data-pid=\"2055331\" data-uid=\"2\">\n<div>\n<div>\n<div> <span>\u8cc7\u6df1\u5927\u4f6c : Meltdown <\/span>  <\/div>\n<div> <i title=\"\u5f15\u7528\"><\/i>  <span>          <\/span> <\/div>\n<\/p><\/div>\n<div>                                                             \u628a\u777f\u9891\u5173\u4e86?boot \u542f\u52a8\u53c2\u6570\u91cc\u8bbe\u7f6e\u4e0b processor.max_cstate,intel_idle.max_cstate.<br \/>Bios \u6027\u80fd\u6a21\u5f0f\u4e4b\u7c7b\u7684\u4e5f\u68c0\u67e5\u4e0b\u662f\u5426\u4e00\u6837\uff0c\u6ca1\u6709 cpufreq governor \u8c8c\u4f3c\u4e5f\u53ef\u4ee5\u88c5\u4e0b\u5427\uff1f\u8bbe\u7f6e\u6210\u4e00\u6837\u7684\u770b\u770b\uff1f                                                            <\/div>\n<\/p><\/div>\n<\/li>\n<li>\n","protected":false},"excerpt":{"rendered":"<p>\u5173\u4e8e perf stat \u7684 cy&hellip;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[],"tags":[],"_links":{"self":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/127029"}],"collection":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=127029"}],"version-history":[{"count":0,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/127029\/revisions"}],"wp:attachment":[{"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=127029"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=127029"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=127029"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}