OnWorks favicon

cpulimit - Online in the Cloud

Run cpulimit in OnWorks free hosting provider over Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator

This is the command cpulimit that can be run in the OnWorks free hosting provider using one of our multiple free online workstations such as Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator



cpulimit -- limits the CPU usage of a process


cpulimit [TARGET] [OPTIONS...] [ -- PROGRAM]


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


-b, --background
run cpulimit in the background, freeing up the terminal

-c, --cpu
specify the number of CPU cores available. Usually this is detected for us.

-l, --limit=N
percentage of CPU allowed from 1 up. Usually 1 - 100, but can be higher on multi-
core CPUs. (mandatory)

-q, --quiet
Runs in quiet mode, avoids writing update messages to console.

-k, --kill
kill target process instead of throttling its CPU usage

-r, --restore
restore a process killed using the -k flag.

-s, --signal
send an alternative signal to the watched process when we exit. Default is SIGCONT.

-v, --verbose
show control statistics

-z, --lazy
exit if there is no suitable target process, or if it dies

-- This is the final CPUlimit option. All following options are for another program we
will launch.

-h, --help
display this help and exit


Assuming you have started `foo --bar` and you find out with top(1) or ps(1) that this
process uses all your CPU time you can either

# cpulimit -e foo -l 50
limits the CPU usage of the process by acting on the executable program file (note:
the argument "--bar" is omitted)

# cpulimit -p 1234 -l 50
limits the CPU usage of the process by acting on its PID, as shown by ps(1)

# cpulimit -P /usr/bin/foo -l 50
same as -e but uses the absolute path name

# /usr/bin/someapp

# cpulimit -p $! -l 25 -b
Useful for scripts where you want to throttle the last command run.

# cpulimit -l 20 firefox
Launch Firefox web browser and limit its CPU usage to 20%

# cpulimit -l 25 -- firefox -private
Launch Firefox web browser in private mode and limit its CPU usage to 25%

# cpulimit -c 2 -p 12345 -l 25
The -c flag sets the number of CPU cores the program thinks are available. Usually
this is detected for us, but can be over-ridden.

# cpulimit -l 20 -k firefox
Launch the Firefox program and kill it if the process goes over 20% CPU usage.

# cpulimit -l 20 -p 1234 -s SIGTERM
Throttle process 1234 at 20% CPU usage. If cpulimit is forced to exit, it sends the
watched process the SIGTERM signal.


· cpulimit always sends the SIGSTOP and SIGCONT signals to a process, both to verify
that it can control it and to limit the average amount of CPU it consumes. This can
result in misleading (annoying) job control messages that indicate that the job has
been stopped (when actually it was, but immediately restarted). This can also cause
issues with interactive shells that detect or otherwise depend on SIGSTOP/SIGCONT.
For example, you may place a job in the foreground, only to see it immediately stopped
and restarted in the background. (See also <http://bugs.debian.org/558763>.)

· When invoked with the -e or -P options, cpulimit looks for any process under /proc
with a name that matches the process name argument given. Furthermore, it uses the
first instance of the process found. To control a specific instance of a process, use
the -p option and provide a PID.

· The current version of cpulimit assumes the kernel HZ value 100.

Use cpulimit online using onworks.net services

Free Servers & Workstations

Download Windows & Linux apps

  • 1
    Cuckoo Sandbox
    Cuckoo Sandbox
    Cuckoo Sandbox uses components to
    monitor the behavior of malware in a
    Sandbox environment; isolated from the
    rest of the system. It offers automated
    analysis o...
    Download Cuckoo Sandbox
  • 2
    Play YouTube video on LMS (porting of
    Triode's to YouTbe API v3) This is
    an application that can also be fetched
    Download LMS-YouTube
  • 3
    dotnet sdk
    dotnet sdk
    Core functionality needed to createNET
    Core projects, that is shared between
    Visual Studio and CLI. There are no fees
    or licensing costs, including for
    Download dotnet sdk
  • 4
    Mit dem Programm kann man schnell und
    einfach Pausen bei Sportveranstaltungen
    mit Musik berbrcken. Hierfr haben sie
    die Mglichkeit, folgende Wiedergabvaria...
    Download SportMusik
  • 5
    DavMail POP/IMAP/SMTP/Caldav to Exchange
    DavMail POP/IMAP/SMTP/Caldav to Exchange
    Ever wanted to get rid of Outlook ?
    DavMail is a
    gateway allowing users to use any mail
    client with Exchange and Office 365, e...
    Download DavMail POP/IMAP/SMTP/Caldav to Exchange
  • 6
    DivFix++ is yours AVI video repair and
    preview software. It designed for repair
    and preview files which are on download
    from ed2k(emule), torrent, gnutella, ftp...
    Download DivFix++
  • 7
    JBoss Community
    JBoss Community
    Community driven projects featuring the
    latest innovations for cutting edge
    apps. Our flagship project JBoss AS is
    the leading Open Source,
    Download JBoss Community
  • More »

Linux commands