{"id":37908,"date":"2022-03-15T16:49:03","date_gmt":"2022-03-15T16:49:03","guid":{"rendered":"https:\/\/ubuntuhandbook.org\/?p=37908"},"modified":"2022-03-15T16:49:03","modified_gmt":"2022-03-15T16:49:03","slug":"limit-cpu-usage-ubuntu","status":"publish","type":"post","link":"https:\/\/ubuntuhandbook.org\/index.php\/2022\/03\/limit-cpu-usage-ubuntu\/","title":{"rendered":"How to Limit CPU Usage of Your Apps in Ubuntu 22.04 | 20.04"},"content":{"rendered":"

\"\"<\/a><\/p>\n

Want to limit the cpu usage of an app or process? It’s easy to do the trick in Ubuntu Linux via the LimitCPU<\/code> tool.<\/p>\n

LimitCPU is a simple command line tool that monitors a process and makes sure its CPU usage stays at or below a given percentage, by sending SIGSTOP and SIGCONT POSIX signals to process. All the children processes and threads of the specified process will share the same percentage of CPU.<\/p>\n

LimitCPU<\/a> is the direct child of the old CPUlimit<\/a>. It’s available in the system repositories of all current Ubuntu repositories, though the package name is cpulimit.<\/p>\n

Install LimitCPU in Ubuntu:<\/h3>\n

Press Ctrl+Alt+T<\/b> on keyboard to open terminal. When it opens, run command to install the tool:<\/p>\n

sudo apt install cpulimit<\/pre>\n
\"\"<\/a><\/p>\n
How to use Limit CPU in Ubuntu:<\/h3>\n
It’s quite easy to use the tool, because it has a good documentation. Just run man cpulimit<\/b> in terminal, it will tell you how to use it. For lazy men, here are some examples.<\/p>\n
1<\/b>. Specify app or process to limit via:<\/p>\n
    \n
  • -p<\/b> follow with process id<\/li>\n
  • -e<\/b> follow with executable file name.<\/li>\n
  • -P<\/b> follow with absolute path to executable file.<\/li>\n<\/ul>\n
    For example, make sure process ‘1123’ to use less than 50% CPU (-l follow with number<\/i> specify allowed CPU). <\/p>\n
    cpulimit -p 1123 -l 50<\/pre>\n
    Many apps now use multiple processes, so you may specify which to limit via path to executable:<\/p>\n
    cpulimit -P \/usr\/bin\/firefox -l 50<\/pre>\n
    2.<\/b> The tool can also used to launch an app and limit its CPU usage. For example, launch Firefox and allow up to 50% CPU amount:<\/p>\n
    cpulimit -l 50 firefox<\/pre>\n
    3.<\/b> There are some other command line flags, including:<\/p>\n
      \n
    • -c<\/b> specify the number of CPU cores available for the process.<\/li>\n
    • -b<\/b> \/ -f<\/b> run cpulimit in background \/ foreground.<\/li>\n
    • -q<\/b> run in quite mode.<\/li>\n
    • -k<\/b>, kill the process when reach CPU limit.<\/li>\n
    • -s<\/b>, send alternative signal to watched process when kill it.<\/li>\n<\/ul>\n
      For example, launch Firefox and kill it when reach 30% CPU usage:<\/p>\n
      cpulimit -l 30 -k firefox<\/pre>\n
      Limit process ‘1123’ to 25% CPU and allows 2 cores:<\/p>\n
      cpulimit -c 2 -p 1123 -l 25<\/pre>\n
      Kill Firefox and send SIGTERM signal when it uses 20% CPU:<\/p>\n
      cpulimit -l 20 -e firefox -s SIGTERM<\/pre>\n
      As mentioned, run man cpulimit<\/b> in terminal for more information. <\/p>","protected":false},"excerpt":{"rendered":"
      Want to limit the cpu usage of an app or process? It’s easy to do the trick in Ubuntu Linux via the LimitCPU tool. LimitCPU is a simple command line tool that monitors a process and makes sure its CPU usage stays at or below a given percentage, by sending SIGSTOP and SIGCONT POSIX signals […]<\/p>\n","protected":false},"author":1,"featured_media":37909,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[9],"tags":[2003],"class_list":["post-37908","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-howtos","tag-cpupower"],"amp_enabled":true,"_links":{"self":[{"href":"https:\/\/ubuntuhandbook.org\/index.php\/wp-json\/wp\/v2\/posts\/37908","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ubuntuhandbook.org\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ubuntuhandbook.org\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ubuntuhandbook.org\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ubuntuhandbook.org\/index.php\/wp-json\/wp\/v2\/comments?post=37908"}],"version-history":[{"count":0,"href":"https:\/\/ubuntuhandbook.org\/index.php\/wp-json\/wp\/v2\/posts\/37908\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/ubuntuhandbook.org\/index.php\/wp-json\/wp\/v2\/media\/37909"}],"wp:attachment":[{"href":"https:\/\/ubuntuhandbook.org\/index.php\/wp-json\/wp\/v2\/media?parent=37908"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ubuntuhandbook.org\/index.php\/wp-json\/wp\/v2\/categories?post=37908"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ubuntuhandbook.org\/index.php\/wp-json\/wp\/v2\/tags?post=37908"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}