Difference between revisions of "ProcFS"

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== Per Host ==
== Per Host ==
Regarding the host system there is only one file present:
Regarding the host system there is only one single file present:
=== info ===
=== info ===
  VCIVersion:    0002:0002
  VCIVersion:    0002:0002

Revision as of 14:05, 16 October 2006

Information abaut the current runtime conditions can be found inside the /proc directory. The very most information is read-only. Because it usually is world-readable you do not have to gain root access to look at this information.


Per Host

Regarding the host system there is only one single file present:


VCIVersion:     0002:0002
VCISyscall:     236
VCIKernel:      03000016

You may compare this info to the output of "vserver-info"; you will recognize two of those entries under a slightly different name while VCIKernel seems to be missing:

x2:~# vserver-info
                  Kernel: 2.6.17-2-vserver-amd64
                  VS-API: 0x00020002
            util-vserver: 0.30.210; Sep 30 2006, 23:55:41
                      CC: gcc, gcc (GCC) 4.1.2 20060928 (prerelease) (Debian 4.1.1-15)
                     CXX: g++, g++ (GCC) 4.1.2 20060928 (prerelease) (Debian 4.1.1-15)
                  CFLAGS: '-Wall -g  -O2 -std=c99 -Wall -pedantic -W -funit-at-a-time'
                CXXFLAGS: '-g -O2 -ansi -Wall -pedantic -W -fmessage-length=0 -funit-at-a-time'
              build/host: x86_64-pc-linux-gnu/x86_64-pc-linux-gnu
            Use dietlibc: yes
      Build C++ programs: yes
      Build C99 programs: yes
          Available APIs: compat,v11,fscompat,v13,net,oldproc,olduts
           ext2fs Source: e2fsprogs
   syscall(2) invocation: alternative
     vserver(2) syscall#: 236/glibc

Per vserver instance


This shows the context id, vx_info location and init pid

ID:	1001
Info:	83c37000
Init:	0


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

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


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

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


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

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 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

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
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


Limit columns are: current (1), max observed (2), limit (3) and number of hits (4)

Limit rows are: processes, virtual memory, locked memory, resident set size, anonymous memory, number of files, filedescriptors, locks, sockets, message queues, and shared memory

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

Debugging Control

This complete directory seems not to be present by default. Possibly there is a compile- or a runtime-switch to enable debugging.


If the directory exist you should be able to create these files by issuing commands like:

echo 255 >/proc/sys/vserver/debug_switch

The bigger problem is to find out which values are useful, see Debugging for details.

Please note: some samples are simply copied from the old wiki at http://oldwiki.linux-vserver.org/HowTo+Read+ProcFS, some other are captured from an Athlon AMD X2 system. They do not necessarily fit together.

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