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<p class="MsoNormal">Hello,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Just wanted to follow up on this question. Please let me know if I’m missing anything basic that I need to do to solve this problem.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Regards,<o:p></o:p></p>
<p class="MsoNormal">Rahul<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><b>From:</b> Rahul Gore (Nokia) <br>
<b>Sent:</b> Friday, February 10, 2023 2:43 PM<br>
<b>To:</b> kernelnewbies@kernelnewbies.org<br>
<b>Subject:</b> Calculating private and shared memory for processes<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Hi,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I’m trying to find private and shared memory usage of each process in Linux. One answer on Stack Overflow suggested using ‘smem’ utility (it reads /proc/<pid>/smap). However, the sum of all PSS values in ‘smem’ output is not equal to Used
value of the ‘free’ utility (it reads /proc/meminfo). <o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">CLI output:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="font-family:Consolas">$ sudo smem -t | tail -n 5<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas">2950301 1002 gfstandalone_1_0 --test hw/ 0 1427244 1435899 1453060
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas">2950368 1002 gfstandalone_1_1 --test hw/ 0 1432172 1440818 1457588
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas">3012185 rgore java -classpath /home/rgore 0 2159256 2159348 2163268
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas">-------------------------------------------------------------------------------<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas"> 537 23 702168 24722224
<span style="background:yellow;mso-highlight:yellow">26865451</span> 62093364<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas">$ free -w<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas"> total used free shared buffers cache available<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas">Mem: 65625036 <span style="background:yellow;mso-highlight:yellow">
26415500</span> 511020 351372 1541640 37156876 38119868<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas">Swap: 2097148 726148 1371000<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">So, I doubt the accuracy of the values in /proc/<pid>/smap. Is there a more reliable alternative?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Regards,<o:p></o:p></p>
<p class="MsoNormal">Rahul<o:p></o:p></p>
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