Linux性能测试 pmap命令详解
<p><strong>名称：</strong></p>
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<code class="bash plain">pmap - report memory map of a process(查看进程的内存映像信息)</code>
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<strong>用法</strong> </p>
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<code class="bash plain">pmap [ -x | -d ] [ -q ] pids...</code>
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<code class="bash spaces"> </code><code class="bash plain">pmap -V</code>
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<strong>选项含义</strong></p>
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<code class="bash plain">-x extended Show the extended </code><code class="bash functions">format</code><code class="bash plain">. 显示扩展格式</code>
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<code class="bash spaces"> </code><code class="bash plain">-d device Show the device </code><code class="bash functions">format</code><code class="bash plain">. 显示设备格式</code>
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<code class="bash spaces"> </code><code class="bash plain">-q quiet Do not display some header</code><code class="bash plain">/footer</code> <code class="bash plain">lines. 不显示头尾行</code>
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<code class="bash spaces"> </code><code class="bash plain">-V show version Displays version of program. 显示版本</code>
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<p>
扩展格式和设备格式域：</p>
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<code class="bash plain">Address: start address of map 映像起始地址</code>
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<code class="bash spaces"> </code><code class="bash plain">Kbytes: size of map </code><code class="bash keyword">in</code> <code class="bash plain">kilobytes 映像大小</code>
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<code class="bash spaces"> </code><code class="bash plain">RSS: resident </code><code class="bash functions">set</code> <code class="bash plain">size </code><code class="bash keyword">in</code> <code class="bash plain">kilobytes 驻留集大小</code>
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<code class="bash spaces"> </code><code class="bash plain">Dirty: dirty pages (both shared and private) </code><code class="bash keyword">in</code> <code class="bash plain">kilobytes 脏页大小</code>
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<code class="bash spaces"> </code><code class="bash plain">Mode: permissions on map 映像权限: r=</code><code class="bash functions">read</code><code class="bash plain">, w=write, x=execute, s=shared, p=private (copy on write) </code>
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<code class="bash spaces"> </code><code class="bash plain">Mapping: </code><code class="bash functions">file</code> <code class="bash plain">backing the map , or </code><code class="bash string">'[ anon ]'</code> <code class="bash keyword">for</code> <code class="bash plain">allocated memory, or </code><code class="bash string">'[ stack ]'</code> <code class="bash keyword">for</code> <code class="bash plain">the program stack. 映像支持文件,为已分配内存 为程序堆栈</code>
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<code class="bash spaces"> </code><code class="bash plain">Offset: offset into the </code><code class="bash functions">file</code> <code class="bash plain">文件偏移</code>
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<code class="bash spaces"> </code><code class="bash plain">Device: device name (major:minor) 设备名</code>
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<strong>举例：</strong></p>
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查看进程1的设备格式</p>
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<code class="bash plain"></code><code class="bash comments"># pmap -d 1</code>
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<code class="bash plain">1: init </code>
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<code class="bash plain">Address Kbytes Mode Offset Device Mapping</code>
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<code class="bash plain">00934000 88 r-x-- 0000000000000000 008:00005 ld-2.3.4.so</code>
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<code class="bash plain">0094a000 4 r---- 0000000000015000 008:00005 ld-2.3.4.so</code>
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<code class="bash plain">0094b000 4 rw--- 0000000000016000 008:00005 ld-2.3.4.so</code>
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<code class="bash plain">0094e000 1188 r-x-- 0000000000000000 008:00005 libc-2.3.4.so</code>
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<code class="bash plain">00a77000 8 r---- 0000000000129000 008:00005 libc-2.3.4.so</code>
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<code class="bash plain">00a79000 8 rw--- 000000000012b000 008:00005 libc-2.3.4.so</code>
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<code class="bash plain">00a7b000 8 rw--- 0000000000a7b000 000:00000 [ anon ]</code>
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<code class="bash plain">00a85000 52 r-x-- 0000000000000000 008:00005 libsepol.so.1</code>
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<code class="bash plain">00a92000 4 rw--- 000000000000c000 008:00005 libsepol.so.1</code>
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<code class="bash plain">00a93000 32 rw--- 0000000000a93000 000:00000 [ anon ]</code>
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<code class="bash plain">00d9d000 52 r-x-- 0000000000000000 008:00005 libselinux.so.1</code>
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<code class="bash plain">00daa000 4 rw--- 000000000000d000 008:00005 libselinux.so.1</code>
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<code class="bash plain">08048000 28 r-x-- 0000000000000000 008:00005 init</code>
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<code class="bash plain">0804f000 4 rw--- 0000000000007000 008:00005 init</code>
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<code class="bash plain">084e1000 132 rw--- 00000000084e1000 000:00000 [ anon ]</code>
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<code class="bash plain">b7f5d000 8 rw--- 00000000b7f5d000 000:00000 [ anon ]</code>
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<code class="bash plain">bffee000 72 rw--- 00000000bffee000 000:00000 [ stack ]</code>
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<code class="bash plain">ffffe000 4 ----- 0000000000000000 000:00000 [ anon ]</code>
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<code class="bash plain">mapped: 1700K writeable</code><code class="bash plain">/private</code><code class="bash plain">: 276K shared: 0K</code>
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<code class="bash plain"></code><code class="bash comments">#</code>
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最后一行的值</p>
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mapped 表示该进程映射的虚拟地址空间大小，也就是该进程预先分配的虚拟内存大小，即ps出的vsz</p>
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writeable/private 表示进程所占用的私有地址空间大小，也就是该进程实际使用的内存大小 </p>
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shared 表示进程和其他进程共享的内存大小</p>
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查看进程1的设备格式，不显示头尾行</p>
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<code class="bash plain"></code><code class="bash comments"># pmap -d -q 1</code>
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<code class="bash plain">1: init </code>
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<code class="bash plain">00934000 88 r-x-- 0000000000000000 008:00005 ld-2.3.4.so</code>
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<code class="bash plain">0094a000 4 r---- 0000000000015000 008:00005 ld-2.3.4.so</code>
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<code class="bash plain">0094b000 4 rw--- 0000000000016000 008:00005 ld-2.3.4.so</code>
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<code class="bash plain">0094e000 1188 r-x-- 0000000000000000 008:00005 libc-2.3.4.so</code>
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<code class="bash plain">00a77000 8 r---- 0000000000129000 008:00005 libc-2.3.4.so</code>
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<code class="bash plain">00a79000 8 rw--- 000000000012b000 008:00005 libc-2.3.4.so</code>
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<code class="bash plain">00a7b000 8 rw--- 0000000000a7b000 000:00000 [ anon ]</code>
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<code class="bash plain">00a85000 52 r-x-- 0000000000000000 008:00005 libsepol.so.1</code>
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<code class="bash plain">00a92000 4 rw--- 000000000000c000 008:00005 libsepol.so.1</code>
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<code class="bash plain">00a93000 32 rw--- 0000000000a93000 000:00000 [ anon ]</code>
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<code class="bash plain">00d9d000 52 r-x-- 0000000000000000 008:00005 libselinux.so.1</code>
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<code class="bash plain">00daa000 4 rw--- 000000000000d000 008:00005 libselinux.so.1</code>
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<code class="bash plain">08048000 28 r-x-- 0000000000000000 008:00005 init</code>
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<code class="bash plain">0804f000 4 rw--- 0000000000007000 008:00005 init</code>
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<code class="bash plain">084e1000 132 rw--- 00000000084e1000 000:00000 [ anon ]</code>
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<code class="bash plain">b7f5d000 8 rw--- 00000000b7f5d000 000:00000 [ anon ]</code>
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<code class="bash plain">bffee000 72 rw--- 00000000bffee000 000:00000 [ stack ]</code>
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<code class="bash plain">ffffe000 4 ----- 0000000000000000 000:00000 [ anon ]</code>
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<code class="bash plain"></code><code class="bash comments">#</code>
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<p>
查看进程1的扩展格式</p>
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<code class="bash plain"></code><code class="bash comments"># pmap -x 1</code>
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<code class="bash plain">1: init </code>
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<code class="bash plain">Address Kbytes RSS Anon Locked Mode Mapping</code>
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<code class="bash plain">00934000 88 - - - r-x-- ld-2.3.4.so</code>
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<code class="bash plain">0094a000 4 - - - r---- ld-2.3.4.so</code>
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<code class="bash plain">0094b000 4 - - - rw--- ld-2.3.4.so</code>
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<code class="bash plain">0094e000 1188 - - - r-x-- libc-2.3.4.so</code>
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<code class="bash plain">00a77000 8 - - - r---- libc-2.3.4.so</code>
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<code class="bash plain">00a79000 8 - - - rw--- libc-2.3.4.so</code>
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<code class="bash plain">00a7b000 8 - - - rw--- [ anon ]</code>
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<code class="bash plain">00a85000 52 - - - r-x-- libsepol.so.1</code>
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<code class="bash plain">00a92000 4 - - - rw--- libsepol.so.1</code>
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<code class="bash plain">00a93000 32 - - - rw--- [ anon ]</code>
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<code class="bash plain">00d9d000 52 - - - r-x-- libselinux.so.1</code>
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<code class="bash plain">00daa000 4 - - - rw--- libselinux.so.1</code>
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<code class="bash plain">08048000 28 - - - r-x-- init</code>
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<code class="bash plain">0804f000 4 - - - rw--- init</code>
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<code class="bash plain">084e1000 132 - - - rw--- [ anon ]</code>
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<code class="bash plain">b7f5d000 8 - - - rw--- [ anon ]</code>
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<code class="bash plain">bffee000 72 - - - rw--- [ stack ]</code>
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<code class="bash plain">ffffe000 4 - - - ----- [ anon ]</code>
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<code class="bash plain">-------- ------- ------- ------- -------</code>
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<code class="bash plain">total kB 1700 - - -</code>
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<code class="bash plain"></code><code class="bash comments">#</code>
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<p>
循环显示进程3066的设备格式的最后1行，间隔2秒，</p>
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14</div>
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<code class="bash plain"></code><code class="bash comments"># while true; do pmap -d 3066 | tail -1; sleep 2; done</code>
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<div class="line number2 index1 alt1">
<code class="bash plain">mapped: 5412K writeable</code><code class="bash plain">/private</code><code class="bash plain">: 2028K shared: 0K</code>
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<div class="line number3 index2 alt2">
<code class="bash plain">mapped: 5412K writeable</code><code class="bash plain">/private</code><code class="bash plain">: 2028K shared: 0K</code>
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<div class="line number4 index3 alt1">
<code class="bash plain">mapped: 5412K writeable</code><code class="bash plain">/private</code><code class="bash plain">: 2028K shared: 0K</code>
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<div class="line number5 index4 alt2">
<code class="bash plain">mapped: 5412K writeable</code><code class="bash plain">/private</code><code class="bash plain">: 2028K shared: 0K</code>
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<div class="line number6 index5 alt1">
<code class="bash plain">mapped: 5412K writeable</code><code class="bash plain">/private</code><code class="bash plain">: 2028K shared: 0K</code>
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<div class="line number7 index6 alt2">
<code class="bash plain">mapped: 5412K writeable</code><code class="bash plain">/private</code><code class="bash plain">: 2028K shared: 0K</code>
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<div class="line number8 index7 alt1">
<code class="bash plain">mapped: 5412K writeable</code><code class="bash plain">/private</code><code class="bash plain">: 2028K shared: 0K</code>
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<div class="line number9 index8 alt2">
<code class="bash plain">mapped: 5412K writeable</code><code class="bash plain">/private</code><code class="bash plain">: 2028K shared: 0K</code>
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<div class="line number10 index9 alt1">
<code class="bash plain">mapped: 5412K writeable</code><code class="bash plain">/private</code><code class="bash plain">: 2028K shared: 0K</code>
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<div class="line number11 index10 alt2">
<code class="bash plain">mapped: 5412K writeable</code><code class="bash plain">/private</code><code class="bash plain">: 2028K shared: 0K</code>
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<div class="line number12 index11 alt1">
<code class="bash plain">mapped: 5412K writeable</code><code class="bash plain">/private</code><code class="bash plain">: 2028K shared: 0K</code>
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<div class="line number13 index12 alt2">
<code class="bash plain">mapped: 5412K writeable</code><code class="bash plain">/private</code><code class="bash plain">: 2028K shared: 0K</code>
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<div class="line number14 index13 alt1">
<code class="bash plain">mapped: 5412K writeable</code><code class="bash plain">/private</code><code class="bash plain">: 2028K shared: 0K</code>
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<p>
<span><strong> 总结</strong></span></p>
<p>
以上所述是小编给大家介绍的Linux性能测试 pmap命令详解，希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对网站的支持！</p>
<p>
原文链接：http://www.cnblogs.com/txw1958/archive/2012/07/26/linux-pmap.html</p>
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