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Advanced O&M Command Reference

OceanStor 18000 and 18000F V5 Series V500R007

This document is applicable to OceanStor 18500 V5, 18800 V5, 18500F V5, and 18800F V5. Based on the CLI, this document describes how to use various commands classified by functionsand how to set the CLI and manage the storage system through these commands.

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cmm show page

cmm show page

Function

The cmm show page command is used to view basic information about pages.

Format

cmm show page zero

cmm show page address <addr>

cmm show page ctrl address <addr>

cmm show page statistics

cmm show page statistics sort module

cmm show page statistics sort function

Parameters

Parameter

Description

Value

addr Address of the page control header.

The value is a hexadecimal number.

Views

Diagnostic view

Usage Guidelines

None

Example

  • View basic information about zero pages.

    admin:/diagnose>cmm show page zero-------------------------------------------------------    zero page with dif-------------------------------------------------------    page ctrl address    : ffff880164e20000    page address         : ffff880164e21000    ref counter          : 3    func name            : zero_page_with_dif_init    flags (free/busy)    : busy    isolate              : 0    valid bitmap         : ff    zero flags           : zero    lock                 : 4096    module id            : 21    module name          : CMM-------------------------------------------------------    zero page without dif-------------------------------------------------------    page ctrl address    : ffff880164e20038    page address         : ffff880164e23000    ref counter          : 3    func name            : zero_page_without_dif_init    flags (free/busy)    : busy    isolate              : 0    valid bitmap         : ff    zero flags           : zero    lock                 : 4096    module id            : 21    module name          : CMM
  • View page control headers based on the page address.

    admin:/diagnose>cmm show page address ffff880e7e8cc700
    -------------------------------------------------------
        The page ctrl information of address (ffff880e7e8cc700)
    -------------------------------------------------------
        page ctrl address    : ffff880dd368c000
        page address         : ffff880e7e8cc700
        ref counter          : 1
        func name            : cmm_alloc_multi_page_from_node_just_for_exp_slab_part
        flags (free/busy)    : busy
        isolate              : 0
        valid bitmap         : 0
        zero flags           : non zero
        lock                 : 1792
        module id            : 21
        module name          : CMM
  • View page control headers based on the page control header address.

    admin:/diagnose>cmm show page ctrl address ffff8802b9e78000
    -------------------------------------------------------
        The page ctrl information of address (ffff8802b9e78000)
    -------------------------------------------------------
        page ctrl address    : ffff8802b9e78000
        page address         : ffff8802be718740
        ref counter          : 1
        func name            : cmm_alloc_multi_page_from_node_just_for_exp_slab_part
        flags (free/busy)    : busy
        isolate              : 0
        valid bitmap         : 0
        zero flags           : non zero
        lock                 : 1856
        module id            : 21
        module name          : CMM
  • View page usage.

    admin:/diagnose>cmm show page statistics
              Cpu ID Cached Page Count    Alloced Count      Freed Count  Flush Cache Count
    ---------------- ----------------- ---------------- ---------------- ------------------
                   0               577         30573547         34687939                  0
                   1              9559         30429556         31693762                  0
                   2               651         30491974         31000361                  0
                   3              9569         29946909         23447595                  0
             Numa ID  Free Page Count  Busy Page Count
    ---------------- ---------------- ----------------
                   0           953764           632685
     
        The page usage statistics
            Total Page Count           :          1586449
            Total Free Page Count      :           974120
            All Cached Page Count      :            20356
            Partition Free Page Count  :           953764
            Total Busy Page            :           612329
            Total Alloced Page Count   :        121441986
            Total Freed Page Count     :        120829657
  • View page usage and output the usage based on the module type.

    admin:/diagnose>cmm show page statistics sort module
    ---------------------------------------------------------------------------------------------
     
        The page statistics sorted with module id
     
            The statistics module number is 22
    ---------------------------------------------------------------------------------------------
     
           Module ID               Module Name      Alloc Count       Free Count       Busy Count
                  22                     CACHE        103948322        103512277           436045
                 220                     BTREE          8220032          8219748              284
                 229                       XRB          3934469          3880022            54447
                 200                       LUN          1873370          1842565            30805
                 210                     RAID5          1541310          1541310                0
                 158                    BDM_BA          1076575          1076575                0
                 207                   DISKLOG           448478           448478                0
                  21                       CMM           140955            99986            40969
                 205                   CKG_IOF            60753            12590            48163
                 252                   LOGZONE            59095            57636             1459
                 151                       BDM            43011            43011                0
                 602                       DLM            36296            36296                0
                 203                       VOL            23119            23119                0
                  47                       SYS            20646            20646                0
                 214                   NODEMGR            11303            11273               30
                 215                    LAYOUT             3503             3376              127
                 257                 WRITEHOLE              318              318                0
                 154                   BDM_HDM              268              268                0
                 152                    BDM_SD              109              109                0
                 213                  BACKSCAN               36               36                0
                 155                    BDM_MP               14               14                0
                  93               RSS_UTILITY                4                4                0
  • View page usage and output the usage based on the function type.

    admin:/diagnose>cmm show page statistics sort function
    -------------------------------------------------
     
        The page statistics sorted with function name
     
            The statistics function number is 18
    -------------------------------------------------
     
                       Function Name            Count
             dispatchAllocPageAndSgl           434662
               XRB_AllocInternalPage            54447
                    allocCkgReadPage            48163
    cmm_alloc_multi_page_from_node_just_for_exp_slab_part            40000
                  devLunDoWriteAlloc            30805
            batchAllocReadPageForBDM             1210
                   allocReadPeerPage             1178
        cmm_alloc_one_page_from_node              969
                 transToWriteNodeSgl              284
              allocWriteLogPageInner              245
          addByteCacheDataAllocChunk              142
              allocVolumeObjResource              100
        checkReadDataFromReadCKLDone               63
                 allocWritePagesWrap               30
              allocMobjWriteSglStart               24
                   batchGetLogRemote                4
                allocLogWritePageAct                3
                kill_cross_4GB_pages                2

System Response

The following table describes the parameter meanings.

Parameter

Meaning

Cpu ID

Processor ID.

Cached Page Count

Count of processor cache pages.

Alloced Count

Count of processor page allocations.

Freed Count

Count of processor page release.

Flush Cache Count

Count of processor cache flushes.

Numa ID

Numa ID.

Free Page Count

Count of free pages.

Busy Page Count

Count of busy pages.

Total Page Count

Total count of pages.

page ctrl address

Address of the page control header.

page address

Page address.

ref counter

Count of references.

func name

Interface for invoking zero pages.

flags (free/busy)

Flag of zero page status.

zero flags

Zero page flag.

isolate

Page isolating status.

module id

Module ID.

module name

Module name.

Module ID

Module ID.

Module Name

Module name.

Alloc Count

Count of module page allocations.

Free Count

Count of module page release.

Busy Count

Count of module busy pages.

Function Name

Function name.

Count

Count of function used pages.

lock

Index of the page lock.

Total Free Page Count

Total count of free pages, including page partitions and cached free pages.

Total Busy Page

Total count of busy pages.

Total Alloced Page Count

Total count of page allocations.

Total Freed Page Count

Total count of page release.

All Cached Page Count

Count of pages cached in a page partition.

Partition Free Page Count

Count of free pages in a page partition.

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Updated: 2020-01-17

Document ID: EDOC1000181602

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