------------------------------------------------------------------------------
                      /proc          
------------------------------------------------------------------------------
/proc/sys         Terrehon Bowden <terrehon@pacbell.net>        October 7 1999
                  Bodo Bauer <bb@bb-zone.com>
------------------------------------------------------------------------------
Version 1.2                                              Kernel version 2.2.12
------------------------------------------------------------------------------

Table of Contents
-----------------

  0	ʸ
  0.1	Ϥ/ռ
  0.2	ˡŪ

  1	ƥμ
  1.1	ץȤΥ֥ǥ쥯ȥ
  1.2	ͥǡ
  1.3	/proc/ide  IDE ǥХ
  1.4	/proc/net Υͥåȥ
  1.5	SCSI 
  1.6	/proc/parport ΥѥݡȾ
  1.7	/proc/tty  TTY 

  2	ƥѥ᡼ν
  2.1	/proc/sys/fs - ե륷ƥࡦǡ
  2.2	/proc/sys/fs/binfmt_misc - ¾ΥХʥեޥå
  2.3	/proc/sys/kernel - ̤ͥΥѥ᡼
  2.4	/proc/sys/vm - ۥꡦ֥ƥ
  2.5	/proc/sys/dev - ǥХͭΥѥ᡼
  2.6	/proc/sys/sunrpc - ⡼ȡץ㡦(RPC)
  2.7	/proc/sys/net - ͥåȥϢ
  2.8	/proc/sys/net/ipv4 - IPV4 
  2.9	Appletalk
  2.10  IPX


------------------------------------------------------------------------------
ʸ
------------------------------------------------------------------------------

0.1 Ϥ/ռ
-----------------

ʸϤ IDG Books ޤʤǤ SuSE Linux distribution ܤΰ
Ǥ/proc ե륷ƥˤĤŪʸϤʤäᡢ䤿
ϼͳǤ¿ʸϤ򸵤ˤξϤ򵭽ҤޤǤ̤
Linux  ߥ˥ƥ˴Ը뤳ȤʿȹͤޤʸϤ 2.2.* С
Υͥ˴ŤƤޤޤȤˤϤۤɱ󤤤ΤǤϤʤȹ
ƤޤΩĤȤԤƤޤ 䤿Τ¤ꤳ /proc ե
륷ƥˤĤŪ˰äǽʸǤ ʸ Intel x86 ϡ
ɥ˾ƤƤޤ PPCARMSPARCAPX ħˤĤõƤ
Ȥ顢֤󸫤Ĥ뤳ȤǤʤǤ礦ޤ IPv4 ͥåȥˤ
ƤΤ߰äƤޤIPv6 ¾ΥץȥϰäƤޤ󡣤ʤ
ɲä佤Ƥϴޤޤ Bodo Ƥ˥᡼뤷ƤСʸ
ɲäǤ礦

䤿 Alan CoxRik van RielAlexey Kuznetsov ƤʸԽ˶
Ƥ줿¿ο͡˴դȻפޤˤʸκˤä 
Andi Kleen ʸ礤˻ͤˤޤ ɲäξ󶡤Ƥ줿Ȥ
碌̤ʴդ򤷤Ȼפޤ  Linux ͥ˥ɥ
Ȥ󶡤줿ΰʤ륽եȥκ˽Ϥ줿Ƥ
˴դޤ

ɤΤ褦ʥȡ/ɲäǤ⤢ޤ顢鷺 Bodo Bauer
mail: <bb@bb-zone.com> ޤϢ䤿ϴǤʸɲä
ĺޤ

()  Bodo Bauer ؤΥȤϱѸޤϥɥĸǤꤤޤ

ʸܸؤ JF ץȤΥͥɥ
ΰȤơֹ⿮ <hanataka@abyss.rim.or.jp>  ¼߰
<j-nomura@ce.jp.nec.com> Ԥޤ ʸ˺ݤƥɥХ
Ƥ줿 JF Фˤξڤƴդ򤷤ȻפޤޤΤФ餷
ʸθԤǤꡢܸؤۤƤ줿 Bodo Bauer
<bb@bb-zone.com> ˴դ򤷤ޤ

ʤʸ 2.2.12 ͥбΤǤºݤˤ 2.3/2.4 ϥ
ͥ°ƤΤǤ2.2.12 ͥ°ƤƱ̾ʸ
ΤȤʤäƤޤΤǤդ

ʸκǿǤ http://www.bb-zone.com/Proc/  HTML ǤȤǽ
Ǥ

Ǥ JF ץȤΰȤǤޤhttp://www.linux.or.jp/JF/
õƤ


0.2  ˡŪ
-------------

䤿ϤʸΤݾڤޤ󡣤ʸϤΤäˤʤ
ƥब˲줿Ȼ䤿˶äƤȤƤ⡢䤿Ǥ餤


()  ܸǤԤۼԤʸΤˤĤƲݾڤԤ
ޤ󡣤ǤΤ褦ϤƤޤɼԤΩĤȤԤ
ۤԤäƤޤǽŪˤʸɼԤǤˤƤѤޤ
linux Ͼ˿ʲƤꡢǴѹ줿̵ˤʤäʬ¸ߤ
ޤޤơΤޤȤ򤢤餫ᤴΤ

ޤʸˤä򾷤쥤ȤѹۤڥߥƤ
ޤ˴ؤƤ⤴λ

------------------------------------------------------------------------------
1: ƥμ
------------------------------------------------------------------------------

------------------------------------------------------------------------------
ξϤǤ
------------------------------------------------------------------------------
* ۥե륷ƥ /proc Ȥα Linux ƥξ
  뵡ǽˤĤĴ
* /proc ι¤Ĵ٤
* ͥȥƥưƤץˤĤƼξȯ
------------------------------------------------------------------------------


proc  ե륷ƥϥͥΥǡ¤ΤΥ󥿡եȤƯ
ޤƥ˴ؤꤷꡢưƤ륫ͥΥѥ᡼Ĵ
Τ˻ѤǤޤ

ǽ /proc ɤ߼ѤʬˤĤƸƤߤޤ礦 2 ϤǤ
뤿 /proc/sys ɤΤ褦˻Ѥ뤫ˤĤޤ

1.1  ץȤΥ֥ǥ쥯ȥ
-----------------------------------

/proc ǥ쥯ȥˤϤΥƥäƤץ줾Фơץ
 ID (PID) ̾Ĥ֥ǥ쥯ȥޤǤޤ 

self Ȥ󥯤 proc  ե륷ƥɤǤץؤƤޤ
ƥץΥ֥ǥ쥯ȥ ɽ1-1 ˵󤲤ܤäƤޤ

ɽ 1-1: /proc ˤץȤι
..............................................................................
 ե  
 cmdline   ޥɥ饤
 environ   Ķѿ
 fd        ƤΥեǥץޤǥ쥯ȥ
 mem       ΥץݻƤ
 stat      ץξ
 status    ʹ֤ɤΥץξ
 cwd       ץθߤκȥǥ쥯ȥؤΥ
 exe       Υץμ¹ԷؤΥ
 maps      ꡦޥå
 root      ΥץΥ롼ȡǥ쥯ȥؤΥ
 statm     ץΥ֤ˤĤƤξ
..............................................................................

: ץξ֤ˤĤƤξΤ /proc/PID/status Ȥե
    ɤǲǽǤ

  > cat /proc/self/status 
  Name:   cat 
  State:  R (running) 
  Pid:    5452 
  PPid:   743 
  Uid:    501     501     501     501 
  Gid:    100     100     100     100 
  Groups: 100 14 16 
  VmSize:     1112 kB 
  VmLck:         0 kB 
  VmRSS:       348 kB 
  VmData:       24 kB 
  VmStk:        12 kB 
  VmExe:         8 kB 
  VmLib:      1044 kB 
  SigPnd: 0000000000000000 
  SigBlk: 0000000000000000 
  SigIgn: 0000000000000000 
  SigCgt: 0000000000000000 
  CapInh: 00000000fffffeff 
  CapPrm: 0000000000000000 
  CapEff: 0000000000000000 


 ps ޥɤˤäƸ뤳ȤǤΤȤۤȤƱ򼨤Ƥޤ
º ps Ϥξ proc ե륷ƥफƤޤstatm ե
ˤϥץλѤƤˤĤƤΤܤ󤬤ޤμ
ͤΰ̣ ɽ1-2 ޤ


ɽ 1-2: statm ե
..............................................................................
 ե  
 size      ץιץ
 resident  ˤʬΥ
 shared    ͭƤڡ
 trs       ɤΥڡ
 drs       ǡ/åΥڡ
 lrs       饤֥Υڡ
 dt        줿(dirty)ڡ
..............................................................................

1.2 ͥǡ
------------------

ץιܤƱͤˡäƤ륫ͥˤĤƤξͿƤե
뤬¸ߤޤ ξΤ˻Ѥե /proc ľ¸ߤ
 ɽ1-3 ˼ޤ ΥեƤʤΥƥ¸ߤ
Ƥ櫓ǤϤޤ󡣤ɤΥե뤬¸ߤɤΥե뤬¸ߤʤ
ͥΥե졼ɤƤ⥸塼˰¸Ƥޤ

ɽ 1-3: /proc Υͥ
..............................................................................
 ե     
 apm          APM (Advanced power management) 
 bus          ХͭξޤǤǥ쥯ȥ
 cmdline      ͥΥޥɥ饤
 cpuinfo      CPU ˤĤƤξ
 devices      ѤǤ(֥åȥ饯)ǥХ
 dma           DMA ͥ
 filesystems  ݡȤƤե륷ƥ
 ide          IDE ֥ƥˤĤƤξޤǤǥ쥯ȥ
 interrupts   ߤλѾ
 ioports      I/O ݡȤλѾ
 kcore        ͥΥ(core)Υ᡼(ELF  A.OUT ǽ)
 kmsg         ͥΥå
 ksyms        ͥΥܥ롦ơ֥
 loadavg      ɡ٥졼
 locks        ͥ롦å
 meminfo      
 misc         ¿ʾ
 modules      ɤƤ⥸塼Υꥹ
 mounts       ޥȤƤե륷ƥ
 net          ͥåȥ(򸫤Ƥ)
 partitions   ƥबǧƤѡƥ
 rtc          ꥢ롦ࡦå
 scsi         SCSI (򸫤Ƥ)
 slabinfo     Slab pool ξ
 stat         ̤ͥ׾
 swaps        å׶֤λѾ
 sys          2Ϥ򸫤Ƥ
 uptime       ƥλѻ(uptime)
 version      ͥΥС
..............................................................................

: ߤɤγߤѤƤ뤫ޤ줬Ū˻ѤƤ뤫
     /proc/interrupts Ĵ٤뤳ȤǥåǤޤ

  > cat /proc/interrupts 
             CPU0        
    0:    8728810          XT-PIC  timer 
    1:        895          XT-PIC  keyboard 
    2:          0          XT-PIC  cascade 
    3:     531695          XT-PIC  aha152x 
    4:    2014133          XT-PIC  serial 
    5:      44401          XT-PIC  pcnet_cs 
    8:          2          XT-PIC  rtc 
   11:          8          XT-PIC  i82365 
   12:     182918          XT-PIC  PS/2 Mouse 
   13:          1          XT-PIC  fpu 
   14:    1232265          XT-PIC  ide0 
   15:          7          XT-PIC  ide1 
  NMI:          0 


/proc ˤä˽פʻĤΥ֥ǥ쥯ȥ scsinetsys ¸ߤޤ
Ūʥ롼ȤơΥǥ쥯ȥƤǥ쥯ȥꤽΤΤ¸ߤǤ
ͥ˰¸ƤޤSCSI ͭˤʤäƤʤСscsi ǥ
ȥ¸ߤʤǤ礦net ˤĤƤƱͤǡΥͥ뤬ͥåȥ
򥵥ݡȤƤˤΤ¸ߤޤ

slabinfo ե slab ٥ˤѾξͿޤLinux
С 2.2 Ǥϥڡ٥ʾΥˤ slab pool Ѥޤ
̤˻Ѥ륪֥ (ͥåȥХåեǥ쥯ȥꥭå
) Ϥ鼫Ȥ slab pool äƤޤ

1.3 /proc/ide  IDE ǥХ
---------------------------------

/proc/ide ֥ǥ쥯ȥˤϥͥ뤬ǧƤƤ IDE ǥХˤ
Ƥξ󤬴ޤޤƤޤΥǥ쥯ȥˤϳ IDE ȥΥ֥ǥ
쥯ȥꡢdrivers ե롢ȥΥ֥ĥ꡼ΥǥХǥ쥯ȥ
ؤƤ IDE ǥХΥ󥯤ޤ

drivers ե IDE ǥХ˻ѤƤɥ饤Ф˴ؤŪʾ
ޤǤޤ

  > cat /proc/ide/drivers 
  ide-cdrom version 4.53 
  ide-disk version 1.08 


ܤϥȥͭΥ֥ǥȥˤޤ ide0
ide1 Τ褦̾ˤʤޤΥǥ쥯ȥ ɽ1-4 ˼ե
줾ޤǤޤ

ɽ 1-4: /proc/ide/ide?  IDE ȥ
..............................................................................
 ե  
  channel  IDE ͥ(0 ޤ 1)                    
  config   (PCI/IDE ֥åΤ) 
  mate     ᥤȥ͡
  model    IDE ȥη/åץå
..............................................................................

ƥǥХϤ줬³Ƥ륳ȥΥǥ쥯ȥˤ줾̸ĤΥ
ǥ쥯ȥäƤޤ Υǥ쥯ȥ ɽ1-5 ˵󤲤ե
ޤǤޤ


ɽ 1-5: IDE ǥХ
..............................................................................
 ե          
 cache             å
 capacity          ǥ(512ХȤΥ֥åñ)
 driver            ɥ饤ФȥС
 geometry          ʪȥȥ
 identify          ǥХ̥֥å
 media             ǥη
 model             ǥХμ̻
 settings          ǥХ
 smart_thresholds  IDE ǥ
 smart_values      IDE ǥ
..............................................................................

Ǥⶽ̣ե settings ǤΥե򸫤Хɥ饤֥ѥ᡼
ɤ˰Ǥޤ


  # cat /proc/ide/ide0/hda/settings 
  name                    value           min             max             mode 
  ----                    -----           ---             ---             ---- 
  bios_cyl                526             0               65535           rw 
  bios_head               255             0               255             rw 
  bios_sect               63              0               63              rw 
  breada_readahead        4               0               127             rw 
  bswap                   0               0               1               r 
  file_readahead          72              0               2097151         rw 
  io_32bit                0               0               3               rw 
  keepsettings            0               0               1               rw 
  max_kb_per_request      122             1               127             rw 
  multcount               0               0               8               rw 
  nice1                   1               0               1               rw 
  nowerr                  0               0               1               rw 
  pio_mode                write-only      0               255             w 
  slow                    0               0               1               rw 
  unmaskirq               0               0               1               rw 
  using_dma               0               0               1               rw 


1.4 /proc/net Υͥåȥ
--------------------------------

/proc/net ֥ǥ쥯ȥϰŪʷ˽ޤɽ1-6  IP version 6 
ݡȤΥͥɲäͤ򼨤Ƥޤɽ1-7 Ϥ¾
եȤΰ̣򼨤Ƥޤ

ɽ 1-6: /proc/net  IPv6 
..............................................................................
 ե    
 udp6        UDP å (IPv6)
 tcp6        TCP å (IPv6)
 raw6        (raw)ǥХ (IPv6)
 igmp6       äƤ IP ޥ㥹ȡɥ쥹(IPv6)
 if_inet6    IPv6 󥿡եɥ쥹Υꥹ
 ipv6_route  IPv6 ΤΥͥ롦롼ƥ󥰡ơ֥
 rt6_stats   Х IPv6 롼ƥ󥰡ơ֥
 sockstat6   å (IPv6)
 snmp6       SNMP ǡ (IPv6)
..............................................................................

ɽ 1-7: /proc/net Υͥåȥ
..............................................................................
 ե       
 arp            ͥ ARP ơ֥
 dev            ͥåȥǥХȤ׾
 dev_mcast      ǥХ listen Ƥ Layer2 ޥ㥹ȡ롼
                (󥿡եֹ桢٥롢ȿbind Ƥ륢ɥ쥹
                ο)
 dev_stat       ͥåȥǥХξ
 ip_fwchains    ե롦Ϣ
 ip_fwnames     ե롦̾
 ip_masq        ޥ졼ɥơ֥ޤǤǥ쥯ȥ
 ip_masquerade  פʥޥ졼ɥơ֥
 netstat        ͥåȥ
 raw            (raw)ΥǥХ
 route          ͥ롦롼ƥ󥰡ơ֥
 rpc            RPC ޤǥ쥯ȥ
 rt_cache       롼ƥ󥰡å
 snmp           SNMP ǡ
 sockstat       å
 tcp            TCP å
 tr_rif         ȡ󡦥 RIF 롼ƥ󥰡ơ֥
 udp            UDP å
 unix           UNIX ɥᥤ󥽥å
 wireless       磻쥹󥿡եΥǡ(Wavelan ʤ)
 igmp           äƤ IP ޥ㥹ȡɥ쥹
 psched         Х롦ѥåȡ塼Υѥ᡼
 netlink        PF_NETLINK åȤΥꥹ
 ip_mr_vifs     ޥ㥹Ȳۥ󥿡եΥꥹ
 ip_mr_cache    ޥ㥹ȡ롼ƥ󥰡åΥꥹ
..............................................................................

ξѤơƥѲǽʥͥåȥǥХˤĤƤξ
ȡΥǥХ˥롼ƥ󥰤줿ȥեå̤Τ뤳ȤǤޤ

  > cat /proc/net/dev 
  Inter-|Receive                                                   |[...
   face |bytes    packets errs drop fifo frame compressed multicast|[...
      lo:  908188   5596     0    0    0     0          0         0 [...
    ppp0:15475140  20721   410    0    0   410          0         0 [...
    eth0:  614530   7085     0    0    0     0          0         1 [...
   
  ...] Transmit 
  ...] bytes    packets errs drop fifo colls carrier compressed 
  ...]  908188     5596    0    0    0     0       0          0 
  ...] 1375103    17405    0    0    0     0       0          0 
  ...] 1703981     5535    0    0    0     3       0          0 


1.5 SCSI 
-------------

⤷ƥ SCSI ۥȡץСΥץбɥ饤
ˤʤ̾Υ֥ǥ쥯ȥ /proc/scsi ʲ˸Ĥ뤳ȤǤޤ
ǧƤƤ SCSI ǥХΥꥹȤ  /proc/scsi/scsi ˸Ĥ
ȤǤޤ

  > cat /proc/scsi/scsi 
  Attached devices: 
  Host: scsi0 Channel: 00 Id: 00 Lun: 00 
    Vendor: IBM      Model: DGHS09U          Rev: 03E0 
    Type:   Direct-Access                    ANSI SCSI revision: 03 
  Host: scsi0 Channel: 00 Id: 06 Lun: 00 
    Vendor: PIONEER  Model: CD-ROM DR-U06S   Rev: 1.04 
    Type:   CD-ROM                           ANSI SCSI revision: 02 


ɥ饤Ф̾Υǥ쥯ȥˤϤΥƥǸĤäץȤ˰Ĥ
ե뤬ޤΥեϤΥȥˤĤƤξ󡢻Ѥ
Ƥ IRQ  I/O ɥ쥹ϰϤʤɤξޤǤޤ̤
ѤƤ륢ץ˰¸Ƥޤ Ǥ Adaptec AHA-2940 SCSI ץ
νϤ򼨤Ƥޤ

  > cat /proc/scsi/aic7xxx/0 
   
  Adaptec AIC7xxx driver version: 5.1.19/3.2.4 
  Compile Options: 
    TCQ Enabled By Default : Disabled 
    AIC7XXX_PROC_STATS     : Disabled 
    AIC7XXX_RESET_DELAY    : 5 
  Adapter Configuration: 
             SCSI Adapter: Adaptec AHA-294X Ultra SCSI host adapter 
                             Ultra Wide Controller 
      PCI MMAPed I/O Base: 0xeb001000 
   Adapter SEEPROM Config: SEEPROM found and used. 
        Adaptec SCSI BIOS: Enabled 
                      IRQ: 10 
                     SCBs: Active 0, Max Active 2, 
                           Allocated 15, HW 16, Page 255 
               Interrupts: 160328 
        BIOS Control Word: 0x18b6 
     Adapter Control Word: 0x005b 
     Extended Translation: Enabled 
  Disconnect Enable Flags: 0xffff 
       Ultra Enable Flags: 0x0001 
   Tag Queue Enable Flags: 0x0000 
  Ordered Queue Tag Flags: 0x0000 
  Default Tag Queue Depth: 8 
      Tagged Queue By Device array for aic7xxx host instance 0: 
        {255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255} 
      Actual queue depth per device for aic7xxx host instance 0: 
        {1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1} 
  Statistics: 
  (scsi0:0:0:0) 
    Device using Wide/Sync transfers at 40.0 MByte/sec, offset 8 
    Transinfo settings: current(12/8/1/0), goal(12/8/1/0), user(12/15/1/0) 
    Total transfers 160151 (74577 reads and 85574 writes) 
  (scsi0:0:6:0) 
    Device using Narrow/Sync transfers at 5.0 MByte/sec, offset 15 
    Transinfo settings: current(50/15/0/0), goal(50/15/0/0), user(50/15/0/0) 
    Total transfers 0 (0 reads and 0 writes) 


1.6 /proc/parport ΥѥݡȾ
--------------------------------------

/proc/parport ǥ쥯ȥϥƥΥѥݡȤˤĤƤξޤǤ
ޤݡȤȤ˰ĤΥ֥ǥ쥯ȥ꤬¸ߤݡֹ (0,1,2, ...) 
Ť̾ĤƤޤ

Υǥ쥯ȥˤɽ1-8 ˼ͤĤΥե뤬ޤޤƤޤ

ɽ 1-8: /proc/parport ˤե
..............................................................................
 ե   
 autoprobe  ФǤ IEEE-1284 ǥХ ID 
 devices    ΥݡȤѤƤǥХɥ饤ФΥꥹȡߤΥݡ
            ȤѤƤǥХ̾ˤ + ɽޤ(ɽ
            ʤ⤷ޤ)
 hardware   ѥݡȤΥ١ɥ쥹 IRQ ֹ DMA ͥ롣
 irq         parport Τ˻ѤƤ IRQ(IRQ ֹޤ
            none) 񤭹ळȤˤäѹǤޤ(ΤΩե
            ˤʤäƤޤ)
..............................................................................

1.7 /proc/tty  TTY 
-------------------------

Ѳǽʤޤϻ tty ˤĤƤξ /proc/tty ˸Ĥ뤳ȤǤ
ޤɽ1-9 ˤ褦ʥɥ饤ФȲ(line descipline)ˤĤƤΥե
Υǥ쥯ȥˤǤ礦


ɽ 1-9: /proc/tty ˤե
..............................................................................
 ե       
 drivers        ɥ饤ФΥꥹȤȤλѾ
 ldiscs         Ͽ줿
 driver/serial  Ѿפ 줾 tty ξ
..............................................................................

ߤɤ tty ѤƤ뤫ñ /proc/tty/drivers õǸĤ
뤳ȤǤޤ

  > cat /proc/tty/drivers 
  pty_slave            /dev/pts      136   0-255 pty:slave 
  pty_master           /dev/ptm      128   0-255 pty:master 
  pty_slave            /dev/ttyp       3   0-255 pty:slave 
  pty_master           /dev/pty        2   0-255 pty:master 
  serial               /dev/cua        5   64-67 serial:callout 
  serial               /dev/ttyS       4   64-67 serial 
  /dev/tty0            /dev/tty0       4       0 system:vtmaster 
  /dev/ptmx            /dev/ptmx       5       2 system 
  /dev/console         /dev/console    5       1 system:console 
  /dev/tty             /dev/tty        5       0 system:/dev/tty 
  unknown              /dev/tty        4    1-63 console 


------------------------------------------------------------------------------

------------------------------------------------------------------------------
/proc ե륷ƥϱΥƥξ󶡤ޤץΥǡ
˥ǤΤߤǤʤΥեɤळȤˤꥫͥξ֤
׵᤹뤳ȤǤޤ

/proc Υǥ쥯ȥ깽¤ϾμȿǤƤꡢΥǡõ
ΰ֤餫Ǥʤñõ褦ˤʤäƤޤ
------------------------------------------------------------------------------
------------------------------------------------------------------------------
2: ƥѥ᡼ν
------------------------------------------------------------------------------

------------------------------------------------------------------------------
ξϤǤ
------------------------------------------------------------------------------
* /proc/sys ˤե˽񤭹ळȤˤäƥͥѥ᡼ѹ
* ѥ᡼եĴ
* /proc/sys Υեĥ꡼ɾ
------------------------------------------------------------------------------


/proc/sys ǥ쥯ȥ /proc Ǥä˶̣ʬǤ Ͼ
ǤʤͥΥѥ᡼ѹ뤳Ȥǽˤޤ
ƤߤݤˤϽʬդƤϥƥŬ뤳ȤǤޤ
Ʊͤ˥å夵뤳ȤǤޤӥ󶡤Ƥ륷ƥΥ
ͥѥ᡼ͷǤϤޤ󡣳ȯޥƥƥȤԤ
ȤƤ뤳ȤƵǽ뤳Ȥǧ٤Ǥ顼ȯȥޥ
֡Ȥ뤷ʤ⤢ޤ

ͤѹˤϡñ˿ͤե˽񤭹ǤΥե륷
ƥࡦǡΥ㤬ޤѹԤˤ root ˤʤɬפ
ޤʬѤΥ֡ȥץȤơƥư뤿Ӥ˽񤭹
ˤ뤳ȤǤޤ

/proc/sys ľˤե  Linux ͥưˤƻ¿ʰŪʤ
Ȥƻ뤷ĴꤹΤ˻ѤޤĤΥեѹ
ƥ˲Τ褦ʻפ̷̤򾷤Ȥ뤿ᡢºݤѹ˥ɥ
ȤȥͥΥξ褯ɤळȤ򤪴ᤷޤɤΤ褦ʾ
⡢Υե˲񤭹ˤϽʬտԤäƤ/proc 
ιܤ 2.1.*  2.2 ͥδ֤ǾѹˤʤäƤ뤫⤷ޤ
䤬ˤ /usr/src/linux/Documentation ˤ륫ͥΥɥ
Ȥ褯ľƤ ξϤ pre 2.2 ͥ˴ޤޤʸϤ˴Ť
Ƥʬʤꤢꡢlinux version 2.2.1 ͥΰˤʤޤ

2.1 /proc/sys/fs - ե륷ƥࡦǡ
-------------------------------------------

Υ֥ǥ쥯ȥΥե륷ƥࡢեϥɥ롢inodedentry
ˤĤƤξޤǤޤ

ߡ/proc/sys/fs ˤϰʲΥե뤬ޤ

dentry-state
------------

ǥ쥯ȥꥭåξ֡ǥ쥯ȥꡦȥưŪ˳ݤ줿
줿ꤹΤǡΥեϸߤξ֤ˤĤƤξͿޤΥե
 6ĤͤݻƤơǸĤϻѤƤ餺˥Ǥ¾
ͤĤΰ̣ ɽ2-1 ˵󤲤ޤ

ɽ 2-1: ǥ쥯ȥꥭåξ֥ե
..............................................................................
 ե    
 nr_dentry   ˥˸ޤ
 nr_unused   ѤƤʤå奨ȥο
 age_limit   ꤬­ʤ˥ȥ꤬ƺƤñ̤μ̿
 want_pages  ǡ
..............................................................................

dquot-nr  dquot-max
---------------------

dquot-max եϥå夷Ƥǥȥκͤ
Ƥޤ

dquot-nr եϥǥȥγݺѤߤͤȶǥ
ȥ򼨤Ƥޤ
   
⤷å夵ƤǥѲǽ̤˾ʤ¿
Υ桼Ʊ˻Ѥ褦ʾϡ¤夲ɤǤ礦

file-nr  file-max
-------------------

ͥưŪ˥եϥɥݤޤλˤƤӲ뤳
ȤϤޤ

file-max ͤ Linux ͥ뤬Ƥ뤳ȤǤեϥɥκ
򼨤ޤ⤷եϥɥ뤬­ʤȤ顼å¿Ф
ˤϡξ¤夲ɤǤ礦ͤΥǥեȤ 4096 Ǥ
ѹˤñˤΥե˿񤭹Ǥ:

  # cat /proc/sys/fs/file-max 
  4096 
  # echo 8192 > /proc/sys/fs/file-max 
  # cat /proc/sys/fs/file-max 
  8192 


ñ˿ͤ echo бե˽񤭹Ȥˡϡ
ͥƤѹǽʥѥ᡼ФͭǤ

file-nr λĤͤϡƺѤߤΥեϥɥοΥե
ɥοեϥɥκ򼨤ƤޤƺѤߤΥե
ɥοͶ᤯ˤʤäƤƤºݤ˻οʬ˾Сե
ϥɥλ̤ΥԡοƤǤ顢ͤ䤹ɬ
פϤޤ

ǡʳ˥ץȤ˥ץǤեκ¸ߤޤ
ǰʤȤˡϤñˤѹǤޤ󡣤κͤϥǥեȤǤ 
1024 ꤵƤꡢѹ뤿ˤ /usr/src/linux/include/linux
ˤ limits.h  fs.h ѤɬפޤNR_OPEN ѹ
ͥƥѥ뤷Ƥ

inode-stateinode-nrinode-max
--------------------------------

եϥɥƱͤ˥ͥ inode ¤ΤưŪ˳ݤޤ
뤳ȤϤǤޤ

inode-max ͤ inode ϥɥκ򼨤Ƥޤ ͤ file-max 
ܤܤ礭Ǥ٤ǤʤʤСɸϡɸϡͥåȥ
åȤʤɤ򰷤ˤƱͤ inode ¤Τɬפˤʤ뤫Ǥ⤷
Ū inode ͤ­ʤ褦ʤФͤ䤷Ƥ

inode-nr ե inode-state κǽĤͤޤǤޤǤ餳
եϾάޤ

inode-state ϻĤͭͤȻͤĤΥߡͤޤǤޤͭͤϽ
nr_inodesnr_free_inodespreshrink Ǥ

* nr_inodes

  ƥबƺѤߤ inode ο򼨤ޤLinux ϥڡñ̤ inode 
  Ƥ뤿ᡢͤ inode-max ͤ㴳礭ʤ뤳Ȥޤ

* nr_free_inodes

  Ƥ inode 򼨤Ƥޤ nr_inodes  inode-max 礭
  ƥबʾ inode Ƥ inode ꥹȤʤФʤʤ
  ˤ preshrink ʳˤʤޤ


super-nr  super-max
---------------------

ƱͥưŪ˳Ƥ륹ѡ֥å¤Τǡ뤳
ȤϤޤsuper-max եϥѡ֥åϥɥκǼ
Ƥޤsuper-nr ϸ߳ƤƤǤ

ƤΥޥȤ줿ե륷ƥϥѡ֥åɬפǤ¿
ե륷ƥޥȤ褦ȤˤϤοͤ䤷ɤ
Ǥ礦

2.2 /proc/sys/fs/binfmt_misc - ¾ΥХʥեޥå
-----------------------------------------------------------

Υե¾ /proc/sys/fs/binfmt_misc ֥ǥ쥯ȥ꤬¸ߤޤ
ϥͥ뤬ݡȤƤ뤽¾ΥХʥեޥåȤ򰷤ޤ

binfmt_misc ϥ⥸塼ɲäꥫͥ򥳥ѥ뤷ʤꤹ뤳
ʤ˿ʥХʥեޥåȤϿ뤳ȤǽˤޤԤ
ˤ  binfmt_misc ϥХʥƬΥޥåʥСХʥΥե̾
γĥҤΤäƤɬפޤ

εǽϹ¤ΤΥ󥯥ɡꥹȤǴƤꡢХʥեޥåȤΥ
åȤΥ(ޤϥե̾γĥ)եåȡޥ󥿥ץ
̾ޤǤޤΥХʥư褦׵ᤵ줿ϡθ
Υץ̾ȤơͿ줿󥿥ץ꥿ưޤ 
binfmt_javabinfmt_em86binfmt_mz ƱͤưǤbinfmt_misc ϥǥե
ȤǤϲϿƤޤ󡣼ʬɲäΥХʥեޥåȤϿɬ
ޤ

binfmt_misc ˤĤŪʥեȡϿ줿եޥåȤȤ˰Ĥ
ե뤬ޤĤŪʥե register  status Ǥ

ХʥեޥåȤϿˤ
----------------------------------------

ХʥեޥåȤϿˤϰʲΥޥɤ¹Ԥޤ

  echo :̾::եå:ޥå:ޥ:󥿡ץ꥿: \
                                      > /proc/sys/fs/binfmt_misc/register 

ǡŬڤ̾(name: /proc ǥ쥯ȥΥȥ˻Ѥޤ)ե
(offset: άȥǥեȤ 0)ޥå(magic)ȥޥ(mask: 
άǤǥեȤ 0xff)ƺǸ˴οεư륤󥿥ץ꥿
(interpreter: 㤨ХƥѤ '/bin/echo')ꤹɬפޤ̾Υ
åˤȽ̤ѤϷ(type)  M 򡢥ե̾γĥҤˤȽ
̤ѤˤϷ(type)  E  (ĥҤ magic ΰ֤)ꤷޤ


Хʥեޥåȡϥɥξ֤åޤϥåȤ
--------------------------------------------------------------

/proc/sys/fs/binfmt_misc/status ե cat Сbinfmt_misc θߤ
(ͭ/̵)Ǥޤ֤ѹ뤿ˤ 0 (̵)ޤ 1 (ͭ)
ޤ -1 (ٹ: ϴϿƤΤƥꥢޤ) status 
echo ޤ㤨 echo 0 > status Ȥ binfmt_misc (Ū) ̵
ޤ

ġΥϥɥξ
--------------------

줾Ͽ줿ϥɥ /proc/sys/fs/binfmt_misc ˥ȥޤ
Υե status ƱͤεǽޤγХʥե
ޥåȤˤΤߺѤޤ Υե cat 뤳Ȥˤäơbinfmt  
ץ꥿ޥåˤĤơϢƤ뤳ȤǤޤ

binfmt_misc λ (binfmt_java 򥨥ߥ졼)
-------------------------------------------------

 cd /proc/sys/fs/binfmt_misc  
 echo ':Java:M::\xca\xfe\xba\xbe::/usr/local/java/bin/javawrapper:' > register  
 echo ':HTML:E::html::/usr/local/java/bin/appletviewer:' > register  
 echo ':Applet:M::<!--applet::/usr/local/java/bin/appletviewer:' > register 
 echo ':DEXE:M::\x0eDEX::/usr/bin/dosexec:' > register 


͹Ԥ Java ¹Է Java ץåȤΥݡȤɲäޤ
(binfmt_java ƱͤǤƤΥץåȥե <!--applet> 񤫤ʤ
Ƥ⤹褦 .html ĥҤɲäޤ)  JDK ȥ륹ץȤ 
/usr/local/java/bin/javawrapper ⥤󥹥ȡ뤹ɬפޤΥ
ץȤ Java Υե̾ΰ򤷤ޤ Java Хʥäˤϡ
ѥΤɤ˥饹եؤΥ󥯤Ǥ


2.3 /proc/sys/kernel - ̤ͥΥѥ᡼
-----------------------------------------------

Υǥ쥯ȥϥͥŪưȿǤƤޤˤҤ٤褦
ƤϥͥΥե졼˰¸ƤޤǤפʥե
ĤˤĤơ줬̣ɤΤ褦ˤѤ뤫ޤ

acct
----

ΥեϻĤ highwaterlowwaterfrequency ޤǤޤ

 BSD Υץƥ󥰤ͭˤʤäƤˤΤ¸
ޤͤϤư椷ޤ⤷񤭹Ǥե륷
ƥλĤ̤ lowwater%ʲˤʤȥȤϰߤ졢higtwater%
ʾˤʤä饢ȤƳޤfrequency ϶̤ɤ٤
ǥå뤫(ñ̤)ꤷޤǥեȤ 4230 Ǥ
ͤȶ̤ 2%ʲˤʤȥȤߤ졢4% ʾˤʤȺƳ
ޤ̤ˤĤƤξ 30 äȤ˳ǧޤ

ctrl-alt-del
------------

Υեͤ 0 ʤСctrl-alt-del ϥȥåפơʤ˥ꥻåȤ
Ԥ褦 init(1) ץޤͤ 0 礭СΥ
򲡤Ȥˤ Linux  Ϥ˥֡ȤԤ줿(dirty)Хåե sync
ϹԤޤ

[]
    (dosemu Τ褦)ץबܡɤ(raw)⡼ɤꤷƤ
    ˤϡcrtl-alt-del ϥͥ tty ؤϤ˥ץˤäƲᤵ
    ޤƤɤΤ褦ư뤫ϤΥץबꤷޤ


domainname  hostname
----------------------

Υեϥޥ NIS Υɥᥤ̾ȥۥ̾椷ޤ 
Ū̾ darkstar.frop.org ʤñ:

  # echo "darkstar" > /proc/sys/kernel/hostname 
  # echo "frop.org" > /proc/sys/kernel/domainname 


Ȥ뤳Ȥǡۥ̾ NIS ɥᥤ꤬̾Ǥޤ

osreleaseostypeversion
--------------------------

̾ΰ̣̤ǡϰʲƤޤǤޤ:

  > cat /proc/sys/kernel/osrelease 
  2.2.12 
   
  > cat /proc/sys/kernel/ostype 
  Linux 
   
  > cat /proc/sys/kernel/version 
  #4 Fri Oct 1 12:41:14 PDT 1999 


osrelease ե ostype ե餫Ǥ礦version ˤϾ
ɬפ⤷ޤ#4 ȤΤϤΥ 4 ܤ˥ѥ뤵줿
ͥǤ뤳Ȥ̣³դϥͥ뤬ۤ줿֤򼨤ޤ
ͤѹˤϥͥƹۤ뤷ޤ


panic
-----

Υեͤ  panic ֡ȤޤǤ˥ͥ뤬ԤĤ򼨤Ƥ
ޤեȥˤ watchdog Ѥϡ 60 ꤹ뤳Ȥ侩
ޤ⤷ 0 ꤹȥͥ뤬 panic μư֡Ȥ̵ˤ
줬ǥեȤǤ

printk
------

printk λͤĤͤϤ줾
* console_loglevel
* default_message_loglevel
* minimum_console_level
* default_console_loglevel
򼨤Ƥޤ

ͤϥͥΥ顼åϤ˵Ͽ
 printk() ư˱ƶޤ줾Υ٥˴ؤܤ
 syslog(2) 򻲾ȤƤ

* console_loglevel

  ͥ٤⤤åϥ󥽡ɽޤ

* default_message_level

  ͥ٤ƤʤåϤͥ٤ɽޤ

* minimum_console_loglevel

  console_loglevel ǤǾ(ͥ٤Ǥ⤤)ͤǤ

* default_console_loglevel

  console_loglevel ΥǥեȤͤǤ

sg-big-buff
-----------

Υե SCSI (sg)Хåե礭򼨤ƤޤλǤϤޤ
ͤѹ뤳ȤϤǤޤ󤬡ͥ򥳥ѥ뤹 
include/scsi/sg.h  SG_BIG_BUFF ͤ뤳ȤˤäƽǤޤ

⤷ SANE (Scanner Access Now Easy) ǥʤѤˤϤͤ
⤯ꤷʤ뤫⤷ޤ󡣾ܤ SANE Υޥ˥奢򸫤Ƥ

modprobe
--------

modprobe ΥХʥ꤬Ǥ ͥ뤬⥸塼򥪥ǥޥɥ
ˤͿ줿ץѤޤ

shmmaxshmall (ɲ)
--------------

shmmax ϰ٤ shmget() ƥॳǳƤ뤳ȤǤ IPC ζͭ
κͤǤ
shmall ϶ͭ˻ѲǽʺΥڡǤ

Υեϥͥ륳ե졼 System V IPC ͭˤ
Ȥˤ¸ߤޤ

sysrq  (ɲ)
-----

ΥեϿ SysRq ǽͭˤʤäƤ뤫ɤ򼨤ޤ

ͤ 1 ΤȤϿ SysRq ȹ礻ϥȥåפ첿餫ξ򥳥󥽡
˽Ϥޤ0 ΤȤϤεǽ̵ˤʤޤ

 SysRq ˴ؤܤϥͥ°ʸ sysrq.txt 򸫤



2.4 /proc/sys/vm - ۥꡦ֥ƥ
-------------------------------------------

Υǥ쥯ȥˤϤե Linux ͥβۥ
(VM:Virtual Memory)֥ƥεǽĴ˻Ѥ뤳ȤǤޤˡ
bdflush եϥǥλ̤ˤ⾯ƶޤ

bdflush
-------

Υե bdflush ͥ롦ǡεǽ椷ޤ Υե
ߤΤȤ 9 ĤͤޤǤꡢΤ 6 ĤͥˤäƼº
˻ѤƤޤ ɽ2-2 ˵󤲤ޤ


Table 2-2: Parameters in /proc/sys/vm/bdflush 
ɽ 2-2: /proc/sys/vm/bdflush Υѥ᡼
..............................................................................
          ̣ 
 nfract     줿ХåեåΥѡơͤˤʤä 
            bdflush ޤ
 ndirty     Υǽ񤭹ߤ»ܤǤ֥å
 nrefill    refill ƤӽФ٤˼褦ȤƤʤ(clean)Хåե
            ο
 nref_dirt  Хåե refill ߤ褦Ȥ˱줿Хåեο
            ͤĶƤ bdflushޤ
 dummy      ̤
 age_buffer ̾Хåեեå夹ޤǤλ
 age_super  ѡ֥åեå夹ޤǤλ
 dummy      ̤
 dummy      ̤
..............................................................................

* nfract

  Υѥ᡼ϥХåեåα줿Хåեκ椷ޤ
  ֱ줿פȤϥХåեƤǥ˽񤭹ɬפ뤳Ȥ̣ޤ 
  (ȿФˡʡץХåեϤ˺ƤޤäƤ⹽ޤ)礭
  ͤꤹ  Linux ϥǥؤν񤭹ߤĹ٤餻뤳ȤǤ뤳
  Ȥˤʤޤ ϥ꤬­ʤʤä˰٤̤ I/O ȯ
  뤳Ȥ̣ޤͤˤȤˤ˥ǥؤν񤭹ߤ
  ǥ I/OʿѲޤ

* ndirty

  ndirty  bdflush ٤˥ǥ˽񤭹ळȤǤ줿Хåեκ
  򼨤ޤ 礭ͤϡ٤餻ư٤ I/O ԤȤ̣ޤ
  Ǿͤˤ  bdflush ʬ٤ǸƤӽФʤХ­
  Ȥˤʤޤ

* nrefill

  ͤ refill_freelist() ƤӽФ줿 bdflush ƤХåե
  ΥꥹȤɲä٤Хåեο򼨤ƤޤХåեϤФХڡ
  Ȥϰۤʤä礭ǤꡢäƴϿƤʤФʤʤ
  ΤǤ餫Хåեݤ뤳ȤɬפʤΤǤͤ礭礭
  ۤɡ¿Υ꤬ϲ񤵤ޤ refill_freelist() ¹Ԥ٤Ͼ
  ʤޤ

* nref_dirt

  refill_freelist() Ԥ nref_dirt ¿α줿Хåե 
  bdflush ¹Ԥޤ

* age_buffer  age_super

  Ǹ age_buffer  age_super  Linux 줿Хåեե˽񤭹
  ޤǤκ֤Ϳޤͤ jiffy (å)ɽ졢1 ä
  100 jiffy Ǥ age_buffer ϥǡ֥åκ֤ǡage_super ϥե
  륷ƥΥ᥿ǡκ֤Ǥ

buffermem
---------

ΥեλĤͤϥХåե˻Ѥ̤椷ޤѡ
ơϥƥ˷׻ޤ

ͤ:

* min_percent

  ͤϥХåե˾񤹤٤κѡơǤ

* borrow_percent

  Linux Υ꤬­ʤʤä˥Хåե㥷ˤͰʾΥ
  ƤƤ硢 (MM: Memory Management)֥ƥ¾Ū
  ˻ѤƤ뤿ˡХåեåΥѶ
  Ūڤͤޤ

* max_percent

  ͤϥХåեå˳Ƥ뤳ȤǤκǤ

freepages
---------

ΥեϻĤͤޤǤޤ: minlowhigh:

* min

  ƥζڡοͤãϡͥʳϤʾΥ
  Ƥ뤳ȤǤʤʤޤ

* low

  ڡοͰʲˤʤäǡͥѶŪʥåפ򳫻
  ޤ

* high

  ͥϤοʾΥ˶֤ݤȤȻߤޤ꤬
  ͤ꾯ʤʤäǡͥϴˤ䤫˥åפ򳫻ϤºݤѶ
  Ūʥåפ򤷤ʤƤळȤԤޤ

kswapd
------

kswapd ϥͥ롦åץȡǡǤkswapd ϥͥΰǡ
꤬Ҳդˤʤäꤷˡޤ줾Υ
ƥϰۤʤäƤΤǡƥΤεǽĴʤǤ礦

ΥեϻĤοޤߤޤ:

* tries_base

  kswapd  ٤˲褦ȤκϤοͤ׻ޤ
  ƤϤͤ 4  8 (mm/vmscan.c 򻲾)ǽΤǡܤۤ
  礭Ϥޤ

  swap νФӰ徺ˤϡ ͤ䤹ɤǤ
  

* tries_min

   kswapd ƤӽФ٤˥ڡ褦ȻߤǾβǤ
  οͤ¸ߤΤ kswapd ͥ٤ǸƤӽФ줿ȤƤ⤢
  Υڡ뤳Ȥݾڤ뤿Ǥ

* swap_cluster

  餯ͤƥǽ˺Ǥ礭ʱƶͿǤ礦 

  swap_cluster  kswapd ˽񤭹ڡοǤ ͤ礭
  Ȥˤä kswapd  I/O礭ʲǹԤǥΥβ򸺤餷
  礭᤮ƤϤޤ󡣤ޤˤ礭ȥꥯȡ塼
  դˤʤäƤޤޤ

overcommit_memory
-----------------

ΥեϰĤͤޤǤޤʬ˥꤬뤫Ĵ٤ˤϰʲ
Τ褦ʥ르ꥺबѤޤ: overcommit_memory ͤʤС˽
ʬʥ꤬ȲꤷޤʵǽǡץϤФ
Ƶʥ malloc() ޤ̤ϤΤΰʬΤߤѤ
ޤ ͤ 0 ˤƤȡºݤ˥ƥ˥ץबΤ˽ʬ
꤬äƤ⡢Τ褦ʵ malloc() λߤԤޤ

ǡεǽͭˤȥ꤬­ʤʤäƥå󥰤ꡢ
ƥबꤹ⤷ޤ󡣤Ǥ礭ʡ⤷ϽפʥФǤϤ
ͤ 0 ꤹɤǤ礦

pagecache
---------

Υե buffermem ƱͤƯ򤷤ޤꡦޥåפȥե
̥åΤΥγƤ椹ȤۤʤäƤޤ

٥㤹ͤˤƤϤޤ󡣤ǤʤȡλĤ꤬ʤ
ʤäҲʤꤹȡƥϥå󥰤򵯤Ƥޤޤ

pagetable_cache
---------------

ͥϥץåȤ˥åѰդơĤΥڡơ֥
Ƥޤ( SMP ƥ礤˽ˤʤޤ) ץåȤ
å礭 low  high  δ֤ˤʤޤ

꤬ʤ  CPU ĤΥƥǤϡ̵̤ˤʤ褦ˡ
 0 ˤƤꤢޤ ΥåϡSMP ƥǥͥ롦
ΥåɬפȤʤ®ʥڡơ֥ƤԤ˻Ѥޤ

礭ʥƥǤϤΤޤޤ¿ʬʤǤ礦̾ΥƥǤ
ʤǤ礦(RAM  16MB ʲ) ʥƥǤξͤ 0 
ꤷɤǤ礦

swapctl
-------

Υե 8 ĤѿޤǤޤ Ƥͤ kswapd ˤä
Ѥޤ

ǽλͤĤѿ 
* sc_max_page_age
* sc_page_advance
* sc_page_decline
* sc_page_initial_age
 Linux Υڡ̿δ˻Ѥޤ ڡ̿ȤϤɤΥڡ
褯Ȥ뤫ɤΥڡʤåץȤǤ뤫ϿˡǤ

åץ󤵤줿˥ڡϺǽ sc_page_initial_age (ǥե 3) μ
̿ޤΥڡ kswapd ˤäƥ󤵤줿ˤμ̿ϰʲ
˽äƽޤ

* Ǹ˥󤷤ʹߤ˥ڡѤ줿硢μ̿ sc_page_advance
  (ǥե 3)ʬäޤ ͤ sc_max_page_age(ǥե
  Ȥ 20) Ǥ
* Ǥʤ(ĤޤѤƤʤ)ڡμ̿ sc_page_decline
  (ǥե 1) ޤ

̿ 0 ãڡϥåץȤǤƤ뤳Ȥˤʤޤ

ѿ sc_age_cluster_fractsc_age_cluster_minsc_pageout_weight
sc_bufferout_weight ϥڡ򥹥åץȤݤ kswapd Ѷ椹
Τ˻ѤǤޤ

sc_age_cluster_fract   kswapd ˤäƤ줾Υץ餤ĤΥڡ
󤵤뤫׻Τ˻Ѥޤ׻ϰʲΤ褦ˤʤޤ

           sc_age_cluster_fract
           -------------------- * 󥵥
                  1024

ä kswapd ˥ץΤ򥹥󤵤 sc_age_cluster_fract
 1024 ꤹɬפޤ kswapd 󤹤ڡκǾͤ 
sc_age_cluster_min Ƥޤ  kswapd ʥץ⥹
褦ˤޤ

sc_pageout_weight  sc_bufferout_weight ͤ kswapd ĤΥڡ/Хåե
ΥåץȤ򲿲ߤ뤫椹뤿˻Ѥޤͤˤä
桼ڡȥХåե/å塦γ٤ĴǤޤ ⤷ 
Linux ƥबХåե׵˥åץȤץ
ο¿᤮褦ʤСsc_bufferout_weight 䤹 sc_pageout_weight
򸺤餹ɤǤ礦


2.5 /proc/sys/dev - ǥХͭΥѥ᡼
--------------------------------------------

ΤȤ CDROM ɥ饤ФˤĤƤΤߥݡȤƤޤ ƥ˼դ
Ƥ CD-ROM ɥ饤֤ˤĤƤɤ߹ѤξեΤߤ¸ߤ
:

  > cat /proc/sys/dev/cdrom/info 
  CD-ROM information, Id: cdrom.c 2.55 1999/04/25 
   
  drive name:             sr0     hdb 
  drive speed:            32      40 
  drive # of slots:       1       0 
  Can close tray:         1       1 
  Can open tray:          1       1 
  Can lock tray:          1       1 
  Can change speed:       1       1 
  Can select disk:        0       1 
  Can read multisession:  1       1 
  Can read MCN:           1       1 
  Reports media changed:  1       1 
  Can play audio:         1       1 


sr0  hdb ĤΥɥ饤֤¸ߤ뤳Ȥȡεǽ狼ޤ

2.6  /proc/sys/sunrpc - ⡼ȡץ㡦(RPC)
---------------------------------------------------------

Υǥ쥯ȥϻͤĤΥեޤǤꡢ줾 RPC ؿ NFS NFS
ǡ RPCNLM ΥǥХå⡼ɤ̵ͭꤷޤǥեȤ
ͤ 0 Ǥ 1 ꤹ뤳ȤǥǥХåǽˤʤޤ

2.7 /proc/sys/net - ͥåȥϢ
------------------------------------

ͥΥͥåȥʬؤΥ󥿡ե /proc/sys/net  ˤޤ
ɽ2-3 ˤ¸ߤǽΤƤΥ֥ǥ쥯ȥ򼨤Ƥޤͥ
Υե졼ˤä¸ߤʤΤ⤢뤫⤷ޤ

ɽ 2-3: /proc/sys/net Υ֥ǥ쥯ȥ
..............................................................................
 ǥ쥯ȥ                        ǥ쥯ȥ  
 core          ̥ѥ᡼            appletalk     Appletalk ץȥ
 unix          Unix ɥᥤ󡦥å   netrom        NET/ROM
 802           E802 ץȥ           ax25          AX25
 ethernet      ͥåȡץȥ  rose          X.25 PLP 
 ipv4          IP С 4           x25           X.25 ץȥ
 ipx           IPX                       token-ring    IBM ȡ󡦥
 bridge        ֥å                  decnet        DEC net
 ipv6          IP С 6
..............................................................................

Ǥ IP ͥåȥ˾Ƥޤ AX15X.25DEC Net  Linux 
ǤϤοͤѤƤʤΤǡξϤǤϾάޤIPX 
Appletalk ˴ؤƤϤξϤǾ󶡤ƤޤΥץȥ
˴ؤܤѥ᡼Ƥϥ饤󡦥ɥȤ䥫ͥΥ
ȤƤǤϾ嵭ɽΤμפʥ֥ǥ쥯ȥˤĤ
ޤۤȤɾϥǥեȤΤޤޤפǡͤѹɬ
Ϥޤ

/proc/sys/net/core - ͥåȥΰ̥ץ
-------------------------------------------------

rmem_default
------------

åȤμХåեΥǥեȤ礭(ñ̤ϥХ)Ǥ

rmem_max
--------

åȤμХåեκ礭(ñ̤ϥХ)Ǥ

wmem_default
------------

åȤХåեΥǥեȤ礭(ñ̤ϥХ)Ǥ

wmem_max
--------

åȤХåեκ礭(ñ̤ϥХ)Ǥ

message_burst  message_cost
-----------------------------

Υѥ᡼ϥͥåȥɤ饫ͥΥ˽񤭹ޤٹ
å¤ޤϥӥǽԲǽˤ뤿¤
ꤷޤ
massage_cost 礭Ƚ񤭽ФåϾʤʤޤ
message_burst ϥåΤƤԤޤǥեȤ
Ϸٹå 5 ä˰¤Ƥޤ

netdev_max_backlog
------------------

󥿡եͥ뤬®˥ѥåȤˡ
¦Υ塼ߤѥåȤκǤ

optmem_max
----------

åȤȤХåեκ祵Ǥǡɲåǡä
struct cmsghdr ¤Τˤʤޤ


/proc/sys/net/unix - Unix ɥᥤ󡦥åȤΥѥ᡼
--------------------------------------------------------

Υ֥ǥ쥯ȥˤϥե뤬Ĥޤϥåȡǥ
ץ˴ޤǤλ֤椷ޤ

2.8 /proc/sys/net/ipv4 - IPV4 
----------------------------------

IP С 4 Ϻʤ Unix ΥͥåȥˤƺǤѤƤץ
Ǥ οǯ IP С 6 ֤Ǥ礦
ΤȤС 4 󥿡ͥåȤλ¾ɸǡ Υͥåȥ
ĶΤۤȤɤǻѤƤޤΥץȥϽפʤΤǡLinux ͥ
 IPv4 ֥ƥư椹륵֥ǥ쥯ȥܤƤޤ

ޤǽ /proc/sys/net/ipv4 ιܤˤĤƸƤߤޤ礦

ICMP 
---------

icmp_echo_ignore_all  icmp_echo_ignore_broadcasts
---------------------------------------------------

(1)ͭ(0)̵Ǥ 줾쥫ͥ뤬Ƥ ICMP ECHO ׵̵뤹
 ͥ뤬֥ɥ㥹Ȥޥ㥹ȡɥ쥹ؤ ICMP ECHO ̵
뤹뤫ꤷޤ

⤷֥ɥ㥹ȡɥ쥹ޥ㥹ȡɥ쥹Ūɥ쥹Ȥ
ICMP echo 褦ˤ硢ʤΥͥåȥ¾ΥۥȤؤΥ
åȡեåǥ󥰤ˤ륵ӥǽѤ뤫⤷ʤȤ
դƤ

icmp_destunreach_rateicmp_echoreply_rate
--------------------------------------------
icmp_paramprob_rateicmp_timeexeed_rate
----------------------------------------

ŪϤ ICMP ѥåȿθ٤ꤷޤꤹ
¤ޤͤꤷˤѥåȤο rate/100 ô(Intel 
ƥξ)˰¤ޤ

IP 
-------

ip_autoconfig
-------------

ƥ IP ꤬ RARPBOOTPDHCP ʤɤεˤäưŪ˹Ԥ줿
 1 ˤʤޤǤʤ 0 Ǥ

ip_default_ttl
--------------

IPv4 󥿡ե  TTL (ѥåȼ̿)Ǥ ñ˥ѥåȤư
ǤΥۥå׿Ǥ

ip_dynaddr
----------

󥿡եΥɥ쥹ѹ줿ưŪ˥åȤΥɥ쥹񤭴
뵡ǽͭˤޤ IP ɥ쥹ѹˤʤ륢åס
󥿡եʤɤǤ

ip_forward
----------

󥿡ե֤ IP ѥåȤΥեɤͭޤ̵ˤޤΥ
᡼ѹ¾ƤΥѥ᡼ϥǥեȤ˥ꥻåȤޤ
ܤΥǥեȤϥͥ뤬ۥȤޤϥ롼Τɤ˥ե졼
Ƥ뤫ˤäưۤʤޤ

ip_local_port_range
-------------------

TCP  UDP  ˤäƥݡȤȤƻѤݡȤϰϤǤ
οޤǤƺǽͤϺǤ㤤ݡȤֹ桢ܤοϺǤ⤤ݡ
ȤֹǤǥեȤǤ 1024-4999 ǤΨι⤤ƥǤ
32768-61000 ѹ٤Ǥ

ip_no_pmtu_disc
---------------

ѥ MTU ǥХ򥪥դˤ뤿ΥХ륹åǤȤ̤ˡ
ץꥱ󤫤饽åȤȡ롼ȤȤ˥䥪դˤ뤳ȤǤޤ

ip_masq_debug
-------------

IP ޥ졼ɤΥǥХåǽͭ/̵ꤷޤ

IP ե饰ơ
---------------------------

ipfrag_high_thresh  ipfrag_low_thresh
---------------------------------------

IP ե饰Ȥκƹ˻ѤǤκ̤Ǥ ⤷Ū˳
Ƥ줿꤬ ipfrag_high_thresh ХȤˤʤä顢ե饰ȡϥɥ
 ipfrag_low_thresh ãޤǡѥåȤΤƤޤ


ipfrag_time
-----------

IP ե饰Ȥ֤Ƥ֤Ǥ

TCP 
--------

tcp_retrans_collapse
--------------------

ĤΥ줿ץ󥿤Τ˥ХХߴݻ뤿ΤΤǤ
Τ褦 TCP åΥХ򤹤뤿ˡ ˤϤ礭ʥ
åȤ褦˻ߤޤꤹ뤳ȤǤεǽ򥪥դˤǤޤ

tcp_keepalive_probes
--------------------

ץ饤(keep alive) ꤵ줿 TCP ³ˤơꤷ
ǧѥåȤäƤʤˤǤ줿ȽǤޤ

tcp_keepalive_time
------------------

ץ饤(keep alive)ͭʻˡɤ줯餤٤ǥץ饤֡
 TCP 뤫򼨤ޤ ǥեȤͤ 2 ֤Ǥ

tcp_syn_retries
---------------

TCP ³Ԥ˺ǽ SYN ѥåȤκߤǤ 255 ʾ
ꤷƤϤޤ󡣤ϳ³ФƤλڤꤷޤ
³Ф tcp_retries1 ˤäޤ

tcp_sack
--------

RFC2018 ˤŪǧ(SACK)ͭˤޤ

tcp_timestamps
--------------

RFC1323 줿ॹפͭˤޤ

tcp_stdurg
----------

TCP ۵ޥݥ(urgent pointer)եɤ̩ RFC793 ˽äƲ᤹
ˤޤ ǥեȤ BSD ߴβǶ۵ޥݥ󥿤϶۵ޥǡľ
Ƥޤ RFC793 βǤ϶۵ޥǡκǸؤȤˤʤäƤޤ
ץͭˤȤμΰ㤤ˤ꤬ФƤ뤫⤷ޤ󡣥
եȤǤ̵ˤʤäƤޤ

tcp_syncookies
--------------

ͥ뤬  CONFIG_SYNCOOKIES ץդǥѥ뤵ƤˤΤ
ѤǤޤåȤ SYN ѥ塼줿 syncookie ޤ
ϰŪʡsyn flood פɤޤǥեȤǤ̵ˤʤäƤޤ

åѤγǰ뤳ȤդƤ syncookies 
ꤵ줿Ф٤ˤʤä¦ϿǤ륨顼å
Ȥʤ⤷ʤȤ̣ޤ

tcp_window_scaling
------------------

RFC1323 줿̿ɥΥ󥰤ͭˤޤ

tcp_fin_timeout
---------------

ǽ FIN ôԤĤꤷޤԤäƤ FIN ʤХ
Ȥ̵Ĥޤ ϸ̩˸ TCP εʤˤϰȿƤޤ
ӥǽɤɬפȤʤޤ

tcp_max_ka_probes
-----------------

slow timer ڤ뤴Ȥˡץ饤ָ򲿲뤫򼨤ޤ С
Ȥɤˤ礭ͤꤷƤϤޤ

tcp_max_syn_backlog
-------------------

åȤȤѥ塼ĹǤ Linux 2.2   listen(2)  ǻꤵ줿
backlog ͤϴ³åȤѥ塼ΤߤꤷޤͰʾ
³׵ˤ Linux ϤΥѥåȤΤƻϤޤsyncookies ͭ
ˤʤäƤˤϤǤѥåȤؤֿԤ졢塼κͤϸ
Ū̵뤵ޤ

tcp_retries1
------------

TCP ³׵Фκߤꤷޤ

tcp_retries2
------------

TCP ѥåȤκߤꤷޤ


󥿡եͭ
--------------------------

/proc/sys/net/ipv4/conf ǥ쥯ȥʲˤϥƥबǧƤ륤󥿡
եȤ˰ĤΥ֥ǥ쥯ȥ꤬¸ߤޤ  all Ȥ̾Υ
֥ǥ쥯ȥ꤬¸ߤޤall ֥ǥ쥯ȥѹˤƤΥ
ե˱ƶޤʳΥ֥ǥ쥯ȥѹˤϤ
Υ󥿡եˤΤ߱ƶޤƤΥǥ쥯ȥƱȥ
ޤ:

accept_redirects
----------------

Υåϥͥ뤬 ICMP 쥯ȥå뤫ɤ
ꤷޤǥեȤǤϡͥ뤬̾ΥۥȤȤꤵƤˤ
'yes' ˡ롼Ȥƥե졼󤵤Ƥˤ 'no' ˤʤ


accept_source_route
-------------------

롼ƥɡѥåȤ뤫ݤ뤫ޤǥեȤ
ͥ뤬ɤΤ褦˥ե졼󤵤Ƥ뤫˰¸롼ξ
 'yes' ˡۥȤξ 'no' ˤʤޤ

bootp_relay
-----------

ɥ쥹 0.b.c.d ȤʤäƤꡢ 褬ΥۥȤˤʤäƤʤѥ
ȤʬƤȤƼ뤫ɤ򼨤ޤ  BOOTP ѥǡ
Τ褦ʥѥåȤž뤳Ȥǽˤޤ

ǥեȤ 0 Ǥ εǽ(ͥ롦С 2.2.12 Ǥ)ޤ
Ƥޤ

forwarding
----------

Υ󥿡ե IP եǥ󥰤ͭɤ򼨤ޤ

log_martians
------------

Τʤ롼Ȥɥ쥹äѥåȤ򥫡ͥ˽Ϥ뤫ɤ
򼨤ޤ

mc_forwarding
-------------

ޥ㥹ȤΥ롼ƥ󥰤Ԥ򼨤ޤεǽȤˤϡͥ
  CONFIG_MROUTE ץդǥѥ뤵Ƥɬפޤ
ޥ㥹ȡ롼ƥ󥰡ǡɬפˤʤޤ


proxy_arp
---------

 ARP Ԥ(1)Ԥʤ(0)򼨤ޤ

rp_filter
---------

ȯθڤԤɤǻꤷޤ1 ͭ 0 ̵Ǥǥե
ȤǤ̵Ǥ륢ɥ쥹֥ɥ㥹ȥɥ쥹εΤ
ФƤϾͭˤʤäƤޤ

ͥåȥ饤󥿡ͥåȤؤͣηϩȤʤ롼Ǥͤ 1  
ꤹ뤳ȤǡեɲäʤƤ⡢ͥåȥؤ
餫ʵιɤޤ(ɥ쥹ϵΤǽޤ)

secure_redirects
----------------

ǥեȤΥȥΥꥹȤˤ륲ȥФƤΤ ICMP 
ȤޤǥեȤͭǤ

shared_media
------------

⤷ꤵƤʤȡͥϤΥǥХ˷ҤäƤۤʤä֥ͥå
֤ľ̿ǤȤԤޤ ǥեȤǤ 'yes' ꤵ
ޤ

send_redirects
--------------

¾ΥۥȤؤ ICMP 쥯Ȥ뤫ɤꤷޤ

롼ƥ
----------------

/proc/sys/net/ipv4/route  ǥ쥯ȥˤϥ롼ƥ󥰴ϢԤ
Υե뤬ޤޤƤޤ

error_burst  error_cost
-------------------------

Υѥ᡼ϥ롼ƥ󥰤Υɤ饫ͥ롦˽񤭽Фٹ
å¤뤿˻Ѥޤerror_cost礭Ƚ񤭽Ф
åϾʤʤޤerror_burst ϥåΤƤݤԤ
ǥեȤǤϷٹå 5 ô֤˰¤Ƥޤ

flush
-----

Υե˽񤭹ȥ롼ƥ󥰡åեå夷ޤ

gc_elasticitygc_intervalgc_min_intervalgc_threshgc_timeout
------------------------------------------------------------------

롼ƥ󥰡åΥ٥å쥯٤ư椹ͤ


max_size
--------

롼ƥ󥰡åκ祵Ǥå夬Υã
ϡŤȥ˴ޤ

max_delaymin_delay
--------------------

롼ƥ󥰡å夬եå夵ޤǤλ֤Ǥ

redirect_loadredirect_number
------------------------------

ΥۥȤФ ICMP 쥯Ȥ¿٤ꤹ뤿ΰ
ҤǤ(load)쥯Ȥοǻꤷãˤϡ
ʾΥ쥯Ȥޤ

redirect_silence
----------------

쥯Ȥλڤ졣٤쥯ȿ¤ã˥쥯
ߤƤȤƤ⡢δ֤᤮ȥ쥯ȤƤޤ

ͥåȥ٤ΰ
----------------------

ľܤζ(Ʊ󥯤³ƤΡ)ؤ³ɤΤ褦˰ˤĤ
 /proc/sys/net/ipv4/neigh ǥ쥯ȥꤷޤ

conf ǥ쥯ȥλƱͤˡǥեȤͤݻ뤿 default ֥ǥ
쥯ȥȡ󥿡եȤ˰ĤΥ֥ǥ쥯ȥ꤬¸ߤޤǥ
ȥȤϤɤƱǤ ͣ㳰 default ǥ쥯ȥˤϥ٥
쥯Υѥ᡼ꤹ뤿Υץ󤬴ޤޤƤ뤳ȤǤ

󥿡եǥ쥯ȥˤϰʲΥȥ꤬ޤޤƤޤ

base_reachable_time
-------------------

RFC2461 ˻ꤵƤǽ֤׻Τ˻Ѥ١
ʤͤǤ

retrans_time
------------

ٳǧ(Neighbor Solicitation) åޤǤλ(ñ̤ jiffy
= 1/100 )Ǥ ɥ쥹褷ꡢ٤ǽǤ뤳Ȥǧ
ݤ˻Ѥޤ

unres_qlen
----------

ARP ׵ݻ뤿Υ塼κĹǤARP ɥ쥹褵Ƥ
ˡ¾ؤ׵ѥåȤɤ뤫򼨤Ƥޤ

anycast_delay
-------------

ٳǧåݤΥٱκ֤Ǥñ̤ jiffy (1/100
)ǤϤޤƤޤ (Linux Ϥޤ anycast 򥵥ݡȤ
ޤ)

ucast_solicit
-------------

˥㥹(unicast)ΤκƻԤκǤ

mcast_solicit
-------------

ޥ㥹(multicast)ΤκƻԤκǤ

delay_first_probe_time
----------------------

٤ǽɤκǽγǧԤޤǤٱ֤Ǥ (gc_stale_time
򻲾ȤƤ)

locktime
--------

 ARP/٥ȥϺǤ  locktime вᤷʤ֤Ǥޤ
󡣤ˤä ARP åΥå󥰤ɤޤ

proxy_delay
-----------

 ARP ȥäƤ ARP ׵ޤǤκ֤Ǥºݤ
֤ 0 ʾ proxy_delay ʲˤʤޤˤϡϥͥåȥ
ΰɤ˻Ѥޤ

proxy_qlen
----------

 ARP ޤٱΥ塼κĹǤ(proxy_delay 򻲾ȤƤ
)

app_solicit
-----------

桼٥ ARP ǡؤ׵οǤ0 ˤȥդˤʤޤ

gc_stale_time
-------------

Ť ARP ȥɤ٤٤ǥå뤫ޤ Ťʤä ARP
ȥϺƤӲԤޤ (¾Υޥ IP ɥ쥹ư
Ωޤ)  ucast_solicit  0 礭кǽŪΥۥȤľ ARP
ѥåȤޤ 줬Ԥ  mcast_solicit  0 礭ʾˤ
ARP ׵֥ɥ㥹Ȥޤ

2.9 Appletalk
-------------

/proc/sys/net/appletalk  Appletalk Ѥݤǡݻޤ
ѥ᡼ϰʲΤ褦ˤʤޤ

aarp-expiry-time
----------------

AARP ȥ꤬ڤˤʤޤǤλ֤Ǥ ϸŤۥȤ
˻Ѥޤ

() ʸ "ARP" Ȥޤ "AARP" θǤ

aarp-resolve-time
-----------------

Appletalk ɥ쥹βߤ뤿˻ѤǤ֤Ǥ

aarp-retransmit-limit
---------------------

ɥ쥹κߤǤ

aarp-tick-time
--------------

ڤå٤椹ͤǤ

/proc/net/appletalk ǥ쥯ȥˤϸߤΥޥǻ Appletalk 
ȤΥꥹȤޤ

ƥեɤ DDP ס롦ɥ쥹( network:node) ⡼
ɥ쥹Ԥ塼礭塼礭(ץꥱˤä
ɤ߹ޤΤԤäƤХȿ) ֡åȤνͭԤ uid ȤʤäƤ
ޤ

/proc/net/atalk_iface   Appletalk 򤵤줿ƤΥ󥿡եΥ
ȤǤϥ󥿡ե̾Appletalk ɥ쥹Υɥ쥹Ǥ
ͥåȥϰ(ޤ phase 1 ͥåȥξϥͥåȥֹ) 
եξ֤򼨤Ƥޤ

/proc/net/atalk_route ΤäƤͥåȥ롼ȤΥꥹȤǤϤ
롼ȤŪΥͥåȥľ³Ƥ롼롼ȡե饰롼
ͳǥХޤǤޤ

2.10 IPX
--------

IPX ץȥ /proc/sys/net ˤĴǽͤޤ

ȤϤ IPX ץȥΤ /proc/net/ipx 󶡤Ƥޤ IPX
åȤΥꥹȤޤǤꡢ 륢ɥ쥹ȥ⡼ȥɥ쥹Novell 
(network:node:port)Ϳޤ Novell δ̯˽ä port ʳ 16
ʿǤNot_Connected Υ⡼ȥɥ쥹ˤϷӤĤƤʤ
̣Ƥޤ Tx  Rx Ԥ塼ȼ塼礭Хñ
ǼƤޤstate ϥåȤξ֤uid ϤΥåȤνͭԤΥ桼
ID 򼨤ޤ

/proc/net/ipx_interface ե IPX 󥿡եΥꥹȤǤ ƥ
եΥͥåȥֹ桢Ρֹ桢ͥåȥץ饤ޥͥåȥ
ɤ򼨤ޤ ޤɤΥǥХ˷դƤ뤫(ͥåȥ
ʤ Internal)ȳƤƤ Frame פ򼨤ޤLinux  IPX
Ѥ 802.3802.2802.2 SNAPDIX (Blue Book)ͥåȥե졼򥵥ݡ
Ƥޤ

/proc/net/ipx_route   IPX 롼ȤΰɽǤ줾Υ롼ȤˤĤơ
ŪΥͥåȥ롼ΥΡ(ޤ Directly) ͥåȥξ
롼Υͥåȥɥ쥹(ޤ Connected)ɽޤ

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ͥưΤĤǤϡͥꥳѥ뤹뤳Ȥʤƥ
֡Ȥ뤳Ȥʤˡ˽Ǥޤ/proc/sys ĥ꡼ˤ
եɤ߹ߤΤߤǤʤ뤳ȤǤޤ echo ޥɤѤ
ƤΥեͤ񤭹ळȤˤꡢͥΥǥեȤѹ
Ǥޤ
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