1 What: /proc/pid/smaps_rollup 1 What: /proc/pid/smaps_rollup
2 Date: August 2017 2 Date: August 2017
3 Contact: Daniel Colascione <dancol@googl 3 Contact: Daniel Colascione <dancol@google.com>
4 Description: 4 Description:
5 This file provides pre-summed 5 This file provides pre-summed memory information for a
6 process. The format is almost 6 process. The format is almost identical to /proc/pid/smaps,
7 except instead of an entry for 7 except instead of an entry for each VMA in a process,
8 smaps_rollup has a single entr 8 smaps_rollup has a single entry (tagged "[rollup]")
9 for which each field is the su 9 for which each field is the sum of the corresponding
10 fields from all the maps in /p 10 fields from all the maps in /proc/pid/smaps.
11 Additionally, the fields Pss_A 11 Additionally, the fields Pss_Anon, Pss_File and Pss_Shmem
12 are not present in /proc/pid/s 12 are not present in /proc/pid/smaps. These fields represent
13 the sum of the Pss field of ea 13 the sum of the Pss field of each type (anon, file, shmem).
14 For more details, see Document 14 For more details, see Documentation/filesystems/proc.rst
15 and the procfs man page. 15 and the procfs man page.
16 16
17 Typical output looks like this 17 Typical output looks like this::
18 18
19 00100000-ff709000 ---p 19 00100000-ff709000 ---p 00000000 00:00 0 [rollup]
20 Size: 11 20 Size: 1192 kB
21 KernelPageSize: 21 KernelPageSize: 4 kB
22 MMUPageSize: 22 MMUPageSize: 4 kB
23 Rss: 8 23 Rss: 884 kB
24 Pss: 3 24 Pss: 385 kB
25 Pss_Dirty: 25 Pss_Dirty: 68 kB
26 Pss_Anon: 3 26 Pss_Anon: 301 kB
27 Pss_File: 27 Pss_File: 80 kB
28 Pss_Shmem: 28 Pss_Shmem: 4 kB
29 Shared_Clean: 6 29 Shared_Clean: 696 kB
30 Shared_Dirty: 30 Shared_Dirty: 0 kB
31 Private_Clean: 1 31 Private_Clean: 120 kB
32 Private_Dirty: 32 Private_Dirty: 68 kB
33 Referenced: 8 33 Referenced: 884 kB
34 Anonymous: 34 Anonymous: 68 kB
35 LazyFree: 35 LazyFree: 0 kB
36 AnonHugePages: 36 AnonHugePages: 0 kB
37 ShmemPmdMapped: 37 ShmemPmdMapped: 0 kB
38 Shared_Hugetlb: 38 Shared_Hugetlb: 0 kB
39 Private_Hugetlb: 39 Private_Hugetlb: 0 kB
40 Swap: 40 Swap: 0 kB
41 SwapPss: 41 SwapPss: 0 kB
42 Locked: 3 42 Locked: 385 kB
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