Documentation/ABI/testing/procfs-smaps_rollup

   1 What:           /proc/pid/smaps_rollup
   2 Date:           August 2017
   3 Contact:        Daniel Colascione <dancol@google.com>
   4 Description:
   5                 This file provides pre-summed memory information for a
   6                 process.  The format is almost identical to /proc/pid/smaps,
   7                 except instead of an entry for each VMA in a process,
   8                 smaps_rollup has a single entry (tagged "[rollup]")
   9                 for which each field is the sum of the corresponding
  10                 fields from all the maps in /proc/pid/smaps.
  11                 Additionally, the fields Pss_Anon, Pss_File and Pss_Shmem
  12                 are not present in /proc/pid/smaps.  These fields represent
  13                 the sum of the Pss field of each type (anon, file, shmem).
  14                 For more details, see Documentation/filesystems/proc.rst
  15                 and the procfs man page.
  16
  17                 Typical output looks like this::
  18
  19                         00100000-ff709000 ---p 00000000 00:00 0          [rollup]
  20                         Size:               1192 kB
  21                         KernelPageSize:        4 kB
  22                         MMUPageSize:           4 kB
  23                         Rss:                 884 kB
  24                         Pss:                 385 kB
  25                         Pss_Anon:            301 kB
  26                         Pss_File:             80 kB
  27                         Pss_Shmem:             4 kB
  28                         Shared_Clean:        696 kB
  29                         Shared_Dirty:          0 kB
  30                         Private_Clean:       120 kB
  31                         Private_Dirty:        68 kB
  32                         Referenced:          884 kB
  33                         Anonymous:            68 kB
  34                         LazyFree:              0 kB
  35                         AnonHugePages:         0 kB
  36                         ShmemPmdMapped:        0 kB
  37                         Shared_Hugetlb:        0 kB
  38                         Private_Hugetlb:       0 kB
  39                         Swap:                  0 kB
  40                         SwapPss:               0 kB
  41                         Locked:              385 kB