pmm

Command Function

This command is used to check the usage of the physical pages of the system memory and the page cache.

Syntax

pmm

Parameters

None

Usage

This command is available only in the Debug version.

Example

Run pmm.

Output

Usage of physical pages:

OHOS # pmm
 phys_seg      base         size        free_pages
 --------      -------      ----------  ---------
 0x4065552c    0x809b0000   0x07550000      22344
order = 0, free_count = 16
order = 1, free_count = 12
order = 2, free_count = 8
order = 3, free_count = 6
order = 4, free_count = 13
order = 5, free_count = 16
order = 6, free_count = 12
order = 7, free_count = 4
order = 8, free_count = 79
active   anon   0
inactive anon   0
active   file   1385
inactice file   84
pmm pages: total = 30032, used = 7688, free = 22344
pathCache number = 325
pathCache memory size = 17621(B)
Vnode number = 67
Vnode memory size = 10720(B)

Table 1 Output

Parameter	Description
phys_seg	Address of the physical page control block
base	First physical page address, that is, start address of the physical page memory
size	Size of the physical page memory
free_pages	Number of free physical pages
active anon	Number of active anonymous pages in the page cache
inactive anon	Number of inactive anonymous pages in the page cache
active file	Number of active file pages in the page cache
inactive file	Number of inactive file pages in the page cache
pmm pages	total: total number of physical pages. used: number of used physical pages. free: number of free physical pages.