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782    </style>
783  </head>
784  <body for="html-export" id="body" style="margin:0">
785    <div class="smartperf smartperf-preview" style="min-height: 99vh;">
786      <h1 class="mume-header fontColor">页内存的抓取和展示说明</h1>
787
788      <p class="fontColor">页内存从page层面更深层次剖析应用程序的虚拟内存操作。</p>
789      <h2 class="mume-header fontColor">页内存的抓取</h2>
790
791      <h3 class="mume-header fontColor" id="header-index-1">页内存抓取配置参数</h3>
792
793      <p class="fontColor">
794        <img src="../figures/EBPF/ebpfsetting.jpg" alt="GitHub Logo" />
795        <br />
796        配置项说明:
797      </p>
798      <ul class="fontColor">
799        <li>
800          <pre class="smartperf-text fontColor light">
801Start Page Fault Record:配置项的总开关。
802</pre
803          >
804        </li>
805        <li>
806          <pre class="smartperf-text fontColor light">
807Process:默认配置的是整个系统的,也可选择单进程抓取。
808</pre
809          >
810        </li>
811        <li>
812          <pre class="smartperf-text fontColor light">
813Max Unwind Level:配置抓取调用栈的最大深度。
814</pre
815          >
816        </li>
817      </ul>
818      <p class="fontColor">
819        再点击Record setting,在output file path输入文件名hiprofiler_data_ebpf.htrace,拖动滚动条设置buffer
820        size大小是64MB,抓取时长是50s。
821        <br />
822        <img src="../figures/EBPF/ebpfrecord.jpg" alt="GitHub Logo" />
823        <br />
824        点击Trace command,就会根据上面的配置生成抓取命令,点击Record抓取,抓取过程中会显示抓取时长。
825        <br />
826        <img src="../figures/EBPF/ebpfexcuting.jpg" alt="GitHub Logo" />
827      </p>
828      <h3 class="mume-header fontColor" id="header-index-2">页内存展示说明</h3>
829
830      <p class="fontColor">
831        抓取结束后页内存的trace会自动加载展示。
832        <br />
833        <img src="../figures/EBPF/ebpfsummary.jpg" alt="GitHub Logo" />
834      </p>
835      <p class="fontColor">界面布局介绍:页内存整体界面布局分为3个部分:</p>
836      <ul class="fontColor">
837        <li>
838          <pre class="smartperf-text fontColor light">
839红色区域:泳道图。
840</pre
841          >
842        </li>
843        <li>
844          <pre class="smartperf-text fontColor light">
845绿色区域:详细信息。
846</pre
847          >
848        </li>
849        <li>
850          <pre class="smartperf-text fontColor light">
851黄色区域:辅助信息(Call Stack)。
852</pre
853          >
854        </li>
855      </ul>
856      <h3 class="mume-header fontColor" id="header-index-3">页内存泳道图展示</h3>
857
858      <p class="fontColor">
859        页内存泳道图展示事件(Operation)发生的次数,每个事件都有持续时间,鼠标悬浮以10ms为区间进行次数统计。
860        <br />
861        <img src="../figures/EBPF/EBPFchart.jpg" alt="GitHub Logo" />
862        <br />
863        按住w键放大界面,悬浮框会显示当前时刻的事件发生次数。
864        <br />
865        <img src="../figures/EBPF/EBPFcount.jpg" alt="GitHub Logo" />
866      </p>
867      <h3 class="mume-header fontColor" id="header-index-4">页内存泳道图的框选功能</h3>
868
869      <p class="fontColor">
870        可以对泳道图进行框选,框选后在最下方的弹出层中会展示框选数据的统计表格,总共有三个tab页。
871        <br />
872        Page Fault Statistics的Tab页如图:
873        <br />
874        <img src="../figures/EBPF/vmstatistics.jpg" alt="GitHub Logo" />
875      </p>
876      <ul class="fontColor">
877        <li>
878          <pre class="smartperf-text fontColor light">
879Operation/Process/Thread: 按照Operation为基点显示。
880</pre
881          >
882        </li>
883        <li>
884          <pre class="smartperf-text fontColor light">
885Count: 事件数量。
886</pre
887          >
888        </li>
889        <li>
890          <pre class="smartperf-text fontColor light">
891Duration:总时长。
892</pre
893          >
894        </li>
895        <li>
896          <pre class="smartperf-text fontColor light">
897Min Duration:最小时长。
898</pre
899          >
900        </li>
901        <li>
902          <pre class="smartperf-text fontColor light">
903Avg Duration: 平均时长。
904</pre
905          >
906        </li>
907        <li>
908          <pre class="smartperf-text fontColor light">
909Max Duration:最大时长。
910</pre
911          >
912        </li>
913      </ul>
914      <p class="fontColor">
915        点击下方的Statistics by Thread,可以切换到按照Thread为基点显示数据。
916        <br />
917        <img src="../figures/EBPF/ebpf_bythread.jpg" alt="GitHub Logo" />
918        <br />
919        Analysis的Tab页如图:
920        <br />
921        <img src="../figures/EBPF/Analysis.jpg" alt="GitHub Logo" />
922        <br />
923        Page Fault Calltree的Tab页如图:
924        <br />
925        <img src="../figures/EBPF/VMCalltree.jpg" alt="GitHub Logo" />
926      </p>
927      <ul class="fontColor">
928        <li>
929          <pre class="smartperf-text fontColor light">
930Call Stack:为经过符号解析后的Callstack,并且给出动态链接库或者进程名的信息。
931</pre
932          >
933        </li>
934        <li>
935          <pre class="smartperf-text fontColor light">
936Local:为该调用方法自身占用的CPU时间。
937</pre
938          >
939        </li>
940        <li>
941          <pre class="smartperf-text fontColor light">
942Weight:为该调用方法占用的CPU时间。
943</pre
944          >
945        </li>
946        <li>
947          <pre class="smartperf-text fontColor light">
948%:为该调用方法占用的CPU时间占比。
949</pre
950          >
951        </li>
952      </ul>
953      <p class="fontColor">
954        Page Fault Events的Tab页如图:
955        <br />
956        <img src="../figures/EBPF/VMEvents.jpg" alt="GitHub Logo" />
957      </p>
958      <ul class="fontColor">
959        <li>
960          <pre class="smartperf-text fontColor light">
961Start Time:起始时间。
962</pre
963          >
964        </li>
965        <li>
966          <pre class="smartperf-text fontColor light">
967Duration:时长。
968</pre
969          >
970        </li>
971        <li>
972          <pre class="smartperf-text fontColor light">
973Thread:线程名。
974</pre
975          >
976        </li>
977        <li>
978          <pre class="smartperf-text fontColor light">
979Operation:事件类型。
980</pre
981          >
982        </li>
983        <li>
984          <pre class="smartperf-text fontColor light">
985Address:内存地址。
986</pre
987          >
988        </li>
989        <li>
990          <pre class="smartperf-text fontColor light">
991Size:内存大小。
992</pre
993          >
994        </li>
995      </ul>
996      <h3 class="mume-header fontColor" id="header-index-5">页内存支持多种Options展示风格</h3>
997
998      <p class="fontColor">
999        点击Page Fault Calltree的Tab页底部的Options,会有四个CheckBox复选框。
1000        <br />
1001        <img src="../figures/EBPF/vmOptions.jpg" alt="GitHub Logo" />
1002      </p>
1003      <ul class="fontColor">
1004        <li>
1005          <pre class="smartperf-text fontColor light">
1006Invert:反向输出调用树。
1007</pre
1008          >
1009        </li>
1010        <li>
1011          <pre class="smartperf-text fontColor light">
1012Hide System so:隐藏系统库文件。
1013</pre
1014          >
1015        </li>
1016        <li>
1017          <pre class="smartperf-text fontColor light">
1018Hide Event:隐藏事件。 
1019</pre>
1020        </li>
1021        <li>
1022          <pre class="smartperf-text fontColor light">
1023Hide Thread:隐藏线程。 
1024</pre>
1025        </li>
1026      </ul>
1027      <h3 class="mume-header fontColor" id="header-index-6">页内存支持过滤调用栈调用次数的展示风格</h3>
1028
1029      <p class="fontColor">
1030        点击Page Fault Calltree的Tab页底部的Sample Count
1031        Filter,可以填上区间值。过滤出符合该区间值调用次数的调用栈信息。
1032        <br />
1033        <img src="../figures/EBPF/vmcounter.jpg" alt="GitHub Logo" />
1034      </p>
1035      <h3 class="mume-header fontColor" id="header-index-7">页内存功能的调用栈Group展示-数据分析支持剪裁功能</h3>
1036
1037      <p class="fontColor"><img src="../figures/EBPF/vmdatamining.jpg" alt="GitHub Logo" /></p>
1038      <ul class="fontColor">
1039        <li>
1040          裁剪Callstack,点击Callstack上一个节点符号,再点击底部Symbol
1041          Filter按钮,则该符号自动被裁剪掉,同时将该节点往下所有的Callstack内容裁剪掉。
1042        </li>
1043        <li>裁剪Library,点击Library上一个节点符号,再点击底部Library Filter按钮,则该符号自动被裁剪掉,同时将该节点往下所有的Callstack内容裁剪掉。</li>
1044        <li>先选中要恢复的内容,再点击Reset按钮,将恢复选中的裁剪内容。</li>
1045      </ul>
1046      <h3 class="mume-header fontColor" id="header-index-8">页内存功能的调用栈Group展示支持按条件过滤</h3>
1047
1048      <p class="fontColor">
1049        在Input Filter输入关键字,会显示出带有该关键字的展示信息。
1050        <br />
1051        <img src="../figures/EBPF/vminputfilter.jpg" alt="GitHub Logo" />
1052      </p>
1053      <h3 class="mume-header fontColor" id="header-index-9">页内存辅助信息区展示调用栈</h3>
1054
1055      <p class="fontColor">
1056        当在详细信息区选择一个符号时,将展示与该符号相关的完整的调用栈。如下图的Heaviest Stack Trace:
1057        <br />
1058        <img src="../figures/EBPF/vmheaviesttrace.jpg" alt="GitHub Logo" />
1059      </p>
1060      <h3 class="mume-header fontColor" id="header-index-10">页内存的事件类型的过滤</h3>
1061
1062      <p class="fontColor">
1063        通过选择类型事件进行过滤。
1064        <br />
1065        <img src="../figures/EBPF/VMfilter.jpg" alt="GitHub Logo" />
1066      </p>
1067      <h3 class="mume-header fontColor" id="header-index-11">页内存的火焰图功能</h3>
1068
1069      <p class="fontColor">
1070        点击Page Fault Calltree左下角的柱状图的图标,会切换到火焰图页面。
1071        <br />
1072        <img src="../figures/EBPF/vmflame.jpg" alt="GitHub Logo" />
1073        <br />
1074        进入到火焰图页面,火焰图的展示跟Callinfo的tab页的调用栈显示一致,鼠标放到色块上,悬浮框可以显示调用栈名称、所属Lib库、函数地址、耗时及其占比。
1075        <br />
1076        <img src="../figures/EBPF/vmflameshow.jpg" alt="GitHub Logo" />
1077        <br />
1078        鼠标左键火焰图,会进入下一级界面,左键上级则返回上一级界面。
1079        <br />
1080        <img src="../figures/EBPF/vmflamelevel.jpg" alt="GitHub Logo" />
1081      </p>
1082    </div>
1083
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