HowTo Read ProcFS

Information in /proc/virtual

  /proc/virtual
    .../info

  /proc/virtual/<pid>
    .../info
    .../status
    .../sched
    .../cvirt
    .../cacct
    .../limit

/proc/virtual/info

/proc/virtual/<xid>

This directory contains several files which can provide valuable information on the current context state and settings.

/proc/virtual/<xid>/info

ID:     1001
Info:   83c37000
Init:   0

this shows the context id, vx_info location and init pid

/proc/virtual/<xid>/status

UseCnt: 38
Tasks:  16
Flags:  0000000000000000
BCaps:  00000000d46c04ff
CCaps:  0000000000000000
Ticks:  0

this contains the usage count (references) and task count, as well as the context flags, capability boundary and context capabilities

/proc/virtual/<xid>/sched

Token:                 0
FillRate:              1
Interval:              4
TokensMin:             6
TokensMax:            50
PrioBias:              0
VaVaVoom:              0
cpu 0: 0 0 0

shows the current amount of tokens, scheduler parameters (fill rate, interval, min/max), the priority bias and the calculated vavavoom (priority bonus)

/proc/virtual/<xid>/cacct

UNSPEC:            0/0                             0/0                             0/0           
UNIX:             35/2375                         35/2375                          0/0           
INET:             12/531                          56/1937                         57/1705        
INET6:             0/0                             0/0                             0/0           
OTHER:             0/0                             0/0                             0/0           
forks:  0

this accounts socket messages for the listed protocols, as incoming messages/bytes and outgoing messages/bytes

/proc/virtual/<xid>/cvirt

BiasUptime:     49.73
SysName:        Linux
NodeName:       XXXX.test.org
Release:        2.6.11-rc5
Version:        #12 Sun Feb 27 01:07:29 CET 2005
Machine:        i686
DomainName:     
nr_threads:     16
nr_running:     0
nr_unintr:      0
nr_onhold:      0
load_updates:   14585
loadavg:        0.00 0.00 0.00
total_forks:    272

this contains the uptime bias, utsname settings (sys, node, rel, vers, machine, domain), the number of threads, thread stats (running, uninterruptible, on hold), the number of load updates, the load averages (1,5,15) and the number of forks

/proc/virtual/<xid>/limit

PROC:           16              17              -1           0
VM:          14440           15331              -1           0
VML:             0               0              -1           0
RSS:          5478            5847              -1           0
ANON:         1516            1516              -1           0
FILES:         140             155              -1           0
OFD:           122             122              -1           0
LOCKS:           1               3              -1           0
SOCK:            9               9              -1           0
MSGQ:            0               0              -1           0
SHM:             0               0              -1           0

limit columns are:

1. current
2. max observed
3. limit
4. number of hits

limit rows are:

• processes,
• virtual memory,
• locked memory,
• resident set size,
• anonymous memory,
• number of files,
• filedescriptors,
• locks,
• sockets,
• message queues,
• shared memory

Debug settings in /proc/sys/vserver

  /proc/sys/vserver
    .../debug_switch
    .../debug_xid
    .../debug_cvirt
    .../debug_limit
    .../debug_dlim
    .../debug_nid
    .../debug_net

/proc/sys/vserver/debug_switch

/proc/sys/vserver/debug_xid

/proc/sys/vserver/debug_cvirt

/proc/sys/vserver/debug_limit

/proc/sys/vserver/debug_dlim

/proc/sys/vserver/debug_nid

/proc/sys/vserver/debug_net