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792  <body for="html-export" id="body">
793    <div class="smartperf smartperf-preview">
794      <h1 class="mume-header fontColor">Native Memory抓取和展示说明</h1>
795
796      <p class="fontColor">Native Memory是查看内存的分配和释放等情况。</p>
797      <h2 class="mume-header fontColor">Native Memory的抓取</h2>
798
799      <h3 class="mume-header fontColor">Native Memory抓取配置参数</h3>
800
801      <p class="fontColor">
802        <img src="../figures/NativeMemory/nativememorysetting.jpg" alt="GitHub Logo" /><br />
803        配置参数说明：
804      </p>
805      <ul class="fontColor">
806        <li>ProcessId or ProcessName：设置抓取的进程ID或者进程名，此处以输入com.ohos.mms进程名为例。</li>
807        <li>Max unwind level：抓取的栈的最大深度。</li>
808        <li>Shared Memory Size：native_daemon和native_hook进程之间存储数据的共享内存大小。</li>
809        <li>Filter Memory Size：只抓取大于该size的malloc数据（free不受影响）。</li>
810        <li>Use Fp Unwind：Fp回栈。</li>
811        <li>Use Record Accurately：不过滤数据，上报全量的。</li>
812        <li>Use Offline Symbolization：离线符号化。</li>
813        <li>Use Record Statistics：统计数据上报。</li>
814        <li>statistics interval：统计数据上报周期。</li>
815      </ul>
816      <p class="fontColor">
817        再点击Record setting，在output file path输入文件名hiprofiler_data_nativememory.htrace，拖动滚动条设置buffer
818        size大小是64M，抓取时长是50s。<br />
819        <img src="../figures/NativeMemory/nativememoryset.jpg" alt="GitHub Logo" />
820      </p>
821      <p class="fontColor">
822        点击Trace command，就会根据上面的配置生成抓取命令，点击复制按钮，会将命令行复制。<br />
823        <img src="../figures/NativeMemory/nativememorycommand.jpg" alt="GitHub Logo" />
824      </p>
825      <p class="fontColor">命令行参数说明：</p>
826      <ul class="fontColor">
827        <li>save_file：是否将hook数据保存成文件，不上报protobuf形式数据给hiprofilerd。</li>
828        <li>filter_size：过滤malloc的大小，最小值是0，默认值是4096Byte。</li>
829        <li>smb_pages：nativedeamon与libnativehook间的共享内存大小。</li>
830        <li>max_stack_depth：最多回栈的层数，也就是抓取的栈的最大深度。</li>
831        <li>fp_unwind：是否进行fp回栈。</li>
832        <li>malloc_free_matching_interval：native_daemon从nativehook so的共享内存里取数据的间隔时间。</li>
833        <li>string_compressed：是否进行字符串压缩。</li>
834        <li>fp_unwind：fp回栈。</li>
835      </ul>
836      <p class="fontColor">
837        输入hdc_std shell，进入设备，执行命令。<br />
838        <img src="../figures/NativeMemory/nativeexcutecommand.jpg" alt="GitHub Logo" /><br />
839        执行完成后，进入指定目录查看，在/data/local/tmp下就会生成trace文件。<br />
840        <img src="../figures/NativeMemory/naitvememoryfile.jpg" alt="GitHub Logo" />
841      </p>
842      <h2 class="mume-header fontColor">Native Memory展示说明</h2>
843
844      <p class="fontColor">将抓取的nativememory文件导入到smartperf工具中查看，查看内存的分配和释放等情况。</p>
845      <h3 class="mume-header fontColor">Native Memory泳道图展示类型</h3>
846
847      <p class="fontColor">
848        点击齿轮状的图标可以设置内存的展示单位。<br />
849        <img src="../figures/NativeMemory/NativeChart.jpg" alt="GitHub Logo" />
850      </p>
851      <ul class="fontColor">
852        <li>
853          <pre class="smartperf-text fontColor light">
854Current Bytes：以申请内存的size绘制泳道图。
855</pre
856          >
857        </li>
858        <li>
859          <pre class="smartperf-text fontColor light">
860Native Memory Density：以申请内存的数量绘制泳道图。
861</pre
862          >
863        </li>
864        <li>
865          <pre class="smartperf-text fontColor light">
866All Heap&amp;AnonuymousVM：malloc分配和mmap分配的总量。
867</pre
868          >
869        </li>
870        <li>
871          <pre class="smartperf-text fontColor light">
872All Heap：malloc分配的内存。
873</pre
874          >
875        </li>
876        <li>
877          <pre class="smartperf-text fontColor light">
878All Anonymous VM：mmap分配的内存。
879</pre
880          >
881        </li>
882      </ul>
883      <h3 class="mume-header fontColor">Native Memory泳道图的框选功能</h3>
884
885      <p class="fontColor">
886        可以对内存的数据进行框选，框选后在最下方的弹出层中会展示框选数据的统计表格，总共有四个tab页。<br />
887        Statistics的Tab页，主要显示了统计明细类型。<br />
888        <img src="../figures/NativeMemory/Statistics.jpg" alt="GitHub Logo" />
889      </p>
890      <ul class="fontColor">
891        <li>
892          <pre class="smartperf-text fontColor light">
893Memory Type：内存的类型。
894</pre
895          >
896        </li>
897        <li>
898          <pre class="smartperf-text fontColor light">
899Exsiting：框选区域内申请没有释放的大小。
900</pre
901          >
902        </li>
903        <li>
904          <pre class="smartperf-text fontColor light">
905#Exsiting：框选区域内申请没有释放的次数。
906</pre
907          >
908        </li>
909        <li>
910          <pre class="smartperf-text fontColor light">
911Transient：框选区域内释放的大小。
912</pre
913          >
914        </li>
915        <li>
916          <pre class="smartperf-text fontColor light">
917#Transient：框选区域内释放的次数。
918</pre
919          >
920        </li>
921        <li>
922          <pre class="smartperf-text fontColor light">
923Total Bytes：框选区间内申请的大小。
924</pre
925          >
926        </li>
927        <li>
928          <pre class="smartperf-text fontColor light">
929#Total： 框选区间内申请的次数。
930</pre
931          >
932        </li>
933        <li>
934          <pre class="smartperf-text fontColor light">
935Peak Value： 框选区间内内存申请的峰值。
936</pre
937          >
938        </li>
939        <li>
940          <pre class="smartperf-text fontColor light">
941Exsiting/Total：框选区间内剩余的内存比上申请的内存，其中浅紫色是框选区间内申请的大小/整个时间轴（申请+释放的总大小)，深紫色是框选区间内(申请+释放)的大小/整个时间轴（申请+释放的总大小）。
942</pre
943          >
944        </li>
945      </ul>
946      <p class="fontColor">
947        Call Info的Tab页，主要显示了调用树详细类型。<br />
948        <img src="../figures/NativeMemory/CallInfo.jpg" alt="GitHub Logo" />
949      </p>
950      <ul class="fontColor">
951        <li>
952          <pre class="smartperf-text fontColor light">
953Symble Name：每个内存分配的调用栈。
954</pre
955          >
956        </li>
957        <li>
958          <pre class="smartperf-text fontColor light">
959Size：分配的总大小。
960</pre
961          >
962        </li>
963        <li>
964          <pre class="smartperf-text fontColor light">
965Count：相同调用栈出现的次数。
966</pre
967          >
968        </li>
969      </ul>
970      <p class="fontColor">
971        Native Memory的Tab页，主要显示了单次分配信息列表。<br />
972        <img src="../figures/NativeMemory/NativeMemory.jpg" alt="GitHub Logo" />
973      </p>
974      <ul class="fontColor">
975        <li>
976          <pre class="smartperf-text fontColor light">
977Address：内存块的地址。
978</pre
979          >
980        </li>
981        <li>
982          <pre class="smartperf-text fontColor light">
983Memory Type：内存分配的类型。
984</pre
985          >
986        </li>
987        <li>
988          <pre class="smartperf-text fontColor light">
989Timestamp：时间戳信息。
990</pre
991          >
992        </li>
993        <li>
994          <pre class="smartperf-text fontColor light">
995State：内存地址当前状态Existed 表示框选范围内未释放，Freed表示已释放。
996</pre
997          >
998        </li>
999        <li>
1000          <pre class="smartperf-text fontColor light">
1001Size：该次申请分配内存的大小。
1002</pre
1003          >
1004        </li>
1005        <li>
1006          <pre class="smartperf-text fontColor light">
1007Responsible Library ：调用该函数的库。
1008</pre
1009          >
1010        </li>
1011        <li>
1012          <pre class="smartperf-text fontColor light">
1013Responsible Caller  ：调用该函数的方法。
1014</pre
1015          >
1016        </li>
1017      </ul>
1018      <p class="fontColor">
1019        Snapshot List的Tab页，主要显示了各时刻内存的增长的差值。<br />
1020        <img src="../figures/NativeMemory/Snapshotlist.jpg" alt="GitHub Logo" />
1021      </p>
1022      <ul class="fontColor">
1023        <li>
1024          <pre class="smartperf-text fontColor light">
1025Snapshot：标记的打点说明。
1026</pre
1027          >
1028        </li>
1029        <li>
1030          <pre class="smartperf-text fontColor light">
1031Timestamp ：时间戳信息。
1032</pre
1033          >
1034        </li>
1035        <li>
1036          <pre class="smartperf-text fontColor light">
1037Net Growth ：自从上次Snapshot的增长量，是计算的分配和释放的。
1038</pre
1039          >
1040        </li>
1041        <li>
1042          <pre class="smartperf-text fontColor light">
1043Total Growth ：自从上次Snapshot的增长量，是计算的每一次分配的。
1044</pre
1045          >
1046        </li>
1047        <li>
1048          <pre class="smartperf-text fontColor light">
1049#Exsiting  ：仍然存在的内存数。
1050</pre
1051          >
1052        </li>
1053      </ul>
1054      <h3 class="mume-header fontColor">Native Memory的辅助信息功能</h3>
1055
1056      <p class="fontColor">
1057        在Call Info和Native Memory的Tab页，点击选中某一行，右边画红线处会显示出该行调用栈的树结构信息。<br />
1058        <img src="../figures/NativeMemory/nativecallstack.jpg" alt="GitHub Logo" />
1059      </p>
1060      <h3 class="mume-header fontColor">Native Memory详细显示的过滤功能</h3>
1061
1062      <p class="fontColor">
1063        点击下方的All Allocations可以对Allocation的lifeSpan进行过滤，有三个选择：All Allocatios，Create &amp;
1064        Exsiting，Create &amp; Destroyed。<br />
1065        <img src="../figures/NativeMemory/lifespan.jpg" alt="GitHub Logo" />
1066      </p>
1067      <ul class="fontColor">
1068        <li>
1069          <pre class="smartperf-text fontColor light">
1070 All Allocations：所有的内存。
1071</pre
1072          >
1073        </li>
1074        <li>
1075          <pre class="smartperf-text fontColor light">
1076 Created &amp; Exsiting：创建且被存活的内存。
1077</pre
1078          >
1079        </li>
1080        <li>
1081          <pre class="smartperf-text fontColor light">
1082 Created &amp; Destroyed： 创建且被销毁的内存。
1083</pre
1084          >
1085        </li>
1086      </ul>
1087      <p class="fontColor">
1088        点击下方的All Heap&amp;Anonymous可以对内存类型进行过滤。<br />
1089        <img src="../figures/NativeMemory/AllocationType.jpg" alt="GitHub Logo" />
1090      </p>
1091      <ul class="fontColor">
1092        <li>
1093          <pre class="smartperf-text fontColor light">
1094All Heap&amp;AnonuymousVM：Heap和AnonuymousVM的总量。
1095</pre
1096          >
1097        </li>
1098        <li>
1099          <pre class="smartperf-text fontColor light">
1100All Heap：malloc分配的内存。
1101</pre
1102          >
1103        </li>
1104        <li>
1105          <pre class="smartperf-text fontColor light">
1106All Anonymous VM：mmap的匿名页。
1107</pre
1108          >
1109        </li>
1110      </ul>
1111      <p class="fontColor">
1112        点击下方的Mark Snapshot可以在时间轴上打标签。出现小旗的标志，通过标注多个时间点。点击到Snapshot
1113        List标签页可以看到各个时间点的内存的增长值。<br />
1114        <img src="../figures/NativeMemory/Generation.jpg" alt="GitHub Logo" />
1115      </p>
1116      <h3 class="mume-header fontColor">Native Memory的火焰图功能</h3>
1117
1118      <p class="fontColor">
1119        点击callinfo左下角的柱状图的图标，会切换到火焰图页面。<br />
1120        <img src="../figures/NativeMemory/nativeflame.jpg" alt="GitHub Logo" /><br />
1121        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和size大小。<br />
1122        <img src="../figures/NativeMemory/nativeflameshow.jpg" alt="GitHub Logo" /><br />
1123        鼠标左键火焰图，会进入下一级界面，右键回到上一级。<br />
1124        <img src="../figures/NativeMemory/nativeflamelevel2.jpg" alt="GitHub Logo" />
1125      </p>
1126      <h3 class="mume-header fontColor">Native Memory数据统计功能</h3>
1127
1128      <p class="fontColor">
1129        选择Use Record Statistics和statistics interval配置项抓取的数据，只会显示Call Info的Tab页，Call
1130        Info相关功能同上。<br />
1131        <img src="../figures/NativeMemory/statiscsCallInfo.jpg" alt="GitHub Logo" />
1132      </p>
1133    </div>
1134
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