Calculating private and shared memory for processes

[Rahul Gore (Nokia)]

Hello,

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.

Regards,
Rahul

From: Rahul Gore (Nokia)
Sent: Friday, February 10, 2023 2:43 PM
To: kernelnewbies at kernelnewbies.org
Subject: Calculating private and shared memory for processes

Hi,

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).

CLI output:

$ sudo smem -t | tail -n 5
2950301 1002     gfstandalone_1_0 --test hw/        0  1427244  1435899  1453060
2950368 1002     gfstandalone_1_1 --test hw/        0  1432172  1440818  1457588
3012185 rgore    java -classpath /home/rgore        0  2159256  2159348  2163268
-------------------------------------------------------------------------------
  537 23                                     702168 24722224 26865451 62093364
$ free -w
               total        used        free      shared     buffers       cache   available
Mem:        65625036    26415500      511020      351372     1541640    37156876    38119868
Swap:        2097148      726148     1371000


So, I doubt the accuracy of the values in /proc/<pid>/smap. Is there a more reliable alternative?

Regards,
Rahul
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.kernelnewbies.org/pipermail/kernelnewbies/attachments/20230213/33d63dde/attachment.html>