cpulimit

This project is cpulimit original project forked and patched for vm cpu resource control See the this project based on CPULimit Project : http://cpulimit.sourceforge.net/

How to Work

• Monitoring Target process usage cpu resource (kernel time)
• if target process cpu usage is 100% over, "STOP" signal send to target process
• if target process cpu usage is 100% under, "CONTINUE" signal send to target process

Patch Log

• Support Daemonization
• Support Detecting Multi CPU Limit working about same process
• Support SysLog
• Support make a full static binary for use on the multi platform
• Support Some feature control command line options
• Patched Hurge kernel time issue
• Patched minor bug and issue

Tested

• Some hosting service using this for cpu usage limitation to high load kvm processor in vm hosting servers
• CentOS(RHEL) 2 or higher

Requirement

• Linux (CentOS 4/5/6 Tested)
• gcc 3.x or Higher (gcc 2.95 not tested)
• glibc
• gmake

Preparing Compile

• git clone https://[email protected]/torden/cpulimit.git
• cd cpulimit

compile for production

• gmake

[root@localhost cpulimit]# gmake
Removing Old files..
/bin/rm -f *~ cpulimit
Complete
Normal mode compiling..
/usr/bin/gcc -o cpulimit cpulimit.c -lrt -W -Wall -O2 -g -fomit-frame-pointer -funroll-loops
Complete
[root@localhost cpulimit]# 

compile for debuging

• gmake debug

[root@localhost cpulimit]# gmake debug
Set Debug mode enviroment..
        kernel.core_pattern=/tmp/%e.core.%u
        kernel.suid_dumpable=1
        fs.suid_dumpable=1
        kernel.core_users_pid=1
Complete
Debug mode compiling..
/usr/bin/gcc -o cpulimit cpulimit.c -lrt -g -pg -W -Wall -O2 -pipe -fprefetch-loop-arrays -ffast-math -fforce-addr -falign-functions=4 -funroll-loops
Complete
[root@localhost cpulimit]# 

Support Parameters

Usage: cpulimit TARGET [OPTIONS...]
  TARGET must be exactly one of these:
      -p, --pid=N        pid of the process
      -e, --exe=FILE     name of the executable program file
      -P, --path=PATH    absolute path name of the executable program file
      -L, --logpath      logfile path
   OPTIONS
      -l, --limit=N      percentage of cpu allowed from 0 to 100 (mandatory)
      -v, --verbose      show control statistics
      -z, --lazy         exit if there is no suitable target process, or if it die
      -h, --help         display this help and exit
      -d, --daemonize    damonization
      -f, --fore         force run, killing prevent process with forcing muti run lock
      

Madantory Parameters

• -p or --pid=N : Target Process ID
• -e or --exe=FILE : Executable Program File
• -P or --path=PATH : Absolute Path anem of Excutable Program File
• -L or --logpath : CPULImit logfile full path

Optional Parameters

• -l N or --limit=N : CPU Allow max usage(0 to 100) default value is 100%
• -v or --verbose : show control statistics
• -z or --lazy : exit if there is no suitable target process or if it was die
• -h or --help : display this help and exit
• -d or --daemonize : damonization , if it not use, cpulimited using forground mode
• -f or --force : forcing running mode , killing prevent process with forcing multiple run locking

How to Use

## find target process id
# pgrep crond
1226

## run
# ./cpulimit -p 1126 -l 10 -L /tmp/cpulimit.crond.log -d
1126 is not working, please first check pid

## force running when kill -9 `cpulimit` or after system shutdown or reboot or other
# ./cpulimit -p 1226 -l 10 -L /tmp/cpulimit.crond.log -d 
# ./cpulimit -p 1226 -l 10 -L /tmp/cpulimit.crond.log -d
Another CPULimit daemon working.. (PID:1825), please first check it(1)
# ./cpulimit -p 1226 -l 10 -L /tmp/cpulimit.crond.log -d -f

# pgrep cpulimit
1828

# looking cpulimit log
# tail /tmp/cpulimit.crond.log 
[2013-12-03 15:07:04 KST] Starting TARGET:1226,ME:1825,LIMIT:10
[2013-12-03 15:07:08 KST] Starting TARGET:1226,ME:1828,LIMIT:10