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Advanced O&M Command Reference
OceanStor 2800 V5 V500R007

This document is applicable to OceanStor 2800 V5. Based on the CLI, this document describes how to use various commands classified by functions and how to set the CLI and manage the storage system through these commands. The document that you browse online matches the latest C version of the product. Click Download to download documents of other C versions.

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cmm show mem

cmm show mem


The cmm show mem command is used to view basic information about memory managed by the CMM module and memory contents.


cmm show mem

cmm show mem usage

cmm show mem usage kdump




Diagnostic view

Usage Guidelines



  • View basic information about memory managed by the CMM module.

    admin:/diagnose>cmm show mem
    node  0 cpu set              : 12 (0-11)
    node  0 memory range       0 : 0xffff880138290000 ~ 0xffff880c47d70000 (  44G  250M  896K)
    node  0 total size           : 0xb0fae0000 (  44G  250M  896K)
    CMM total size: 0xb0fae0000 (  44G  250M  896K)
  • View the usage of memory managed by the CMM module.

    admin:/diagnose>cmm show mem usage
    Mem usage of Node  0 Seg  0
    Addr ffff8801a44a4000 ~ ffff8801a8004000 (     3b60000 :                       59M  384K) : CMM Track Ctrl
    Addr ffff8801a8004000 ~ ffff8801a820c000 (      208000 :                        2M   32K) : Free Area
    Addr ffff8801a820c000 ~ ffff8801aa7a0000 (     2594000 :                       37M  592K) : CMM Meta(cmm part struct data)
    Addr ffff8801aa7a0000 ~ ffff8801aa7a4000 (        4000 :                             16K) : CMM Meta(cmm page exp part data)
    Addr ffff8801aa7a4000 ~ ffff8801aa7ac000 (        8000 :                             32K) : Gloabl ZERO PAGE Ctrl & Data
    Addr ffff8801aa7ac000 ~ ffff8805807d4000 (   3d6028000 :                 15G  352M  160K) : USER Part
    Addr ffff8805807d4000 ~ ffff8805a5388000 (    24bb4000 :                      587M  720K) : Global PAGE Ctrl
    Addr ffff8805a5388000 ~ ffff88104dd40000 (   aa89b8000 :                 42G  649M  736K) : Global PAGE Data
    Addr ffff88104dd40000 ~ ffff881073540000 (    25800000 :                            600M) : Global DYNC Pool
    Addr ffff881073540000 ~ ffff881073578000 (       38000 :                            224K) : Free Area
    Addr ffff881073578000 ~ ffff881073584000 (        c000 :                             48K) : CMM Meta(dync part management)
    Addr ffff881073584000 ~ ffff88107d984000 (     a400000 :                            164M) : CMM Meta(cmm alloc/free hist entry area)
    Addr ffff88107d984000 ~ ffff88107d9b4000 (       30000 :                            192K) : CMM Meta(cmm page lock pool)
    Addr ffff88107d9b4000 ~ ffff88107d9b8000 (        4000 :                             16K) : CMM Meta(cmm error record area)
    Addr ffff88107d9b8000 ~ ffff88107e9b8000 (     1000000 :                             16M) : CMM Meta(log data area)
    Addr ffff88107e9b8000 ~ ffff88107e9bc000 (        4000 :                             16K) : CMM Meta(log ctrl)
    Addr ffff88107e9bc000 ~ ffff88107f474000 (      ab8000 :                       10M  736K) : CMM Meta(cmm stat info area)
    Addr ffff88107f474000 ~ ffff88107fefc000 (      a88000 :                       10M  544K) : Rsvd Memory
    Addr ffff88107fefc000 ~ ffff88107fffc000 (      100000 :                              1M) : CMM Meta(cmm manager meta data)
  • View the physical address and size of the CMM KDUMP.

    admin:/diagnose>cmm show mem usage kdump

System Response

The following table describes the parameter meanings.



node 0 cpu set

CPU set of NUMA node 0.

node 0 memory range 0

Memory range of NUMA node 0.

node 0 total size

Memory size of NUMA node 0.

CMM total size

Total size of memory managed by the CMM module.

Mem usage of Node 0 Seg 0

Usage of memory segment 0 of NUMA node 0.

Updated: 2020-03-19

Document ID: EDOC1000181575

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