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