{"id":1393,"date":"2012-06-24T18:22:23","date_gmt":"2012-06-24T15:22:23","guid":{"rendered":"http:\/\/www.void.gr\/kargig\/blog\/?p=1393"},"modified":"2012-06-24T18:56:00","modified_gmt":"2012-06-24T15:56:00","slug":"interrupts-top-like-utility-for-linux","status":"publish","type":"post","link":"https:\/\/www.void.gr\/kargig\/blog\/2012\/06\/24\/interrupts-top-like-utility-for-linux\/","title":{"rendered":"itop – Interrupts ‘top-like’ utility for Linux"},"content":{"rendered":"

On a 24-core Linux machine I wanted to monitor interrupts\/sec. The reason is quite complicated, let’s say that there are more than 100.000 interrupts\/sec and I want to monitor who needs what. <\/p>\n

First I installed Debian’s itop package<\/a>. It didn’t work at all on the 24-core machine, just showed an empty display. Then I tried a perl itop implementation I found online at a redhat server, let’s call it redhat’s itop<\/a>. That still didn’t work well. Lot’s of parsing issues and it certainly wasn’t ready to deal with 24-cores.<\/p>\n

So I tweaked it a bit and made it ready for a 24-core server. You can find it online at my github repository: kargig’s itop<\/a><\/p>\n

Since displaying 24 columns of continuously changing numbers doesn’t fit all screens, I added some command line options to the tool.
\nBy default it shows all interrupts\/sec per CPU if the number of CPU cores is not higher than 8. If it’s higher than 8 it just displays the total (adding all per core numbers) interrupts\/sec.
\nCommand line flag ‘-a’ forces displaying of ALL cores and command line flag ‘-t’ forces displaying just the TOTAL number of interrupts\/sec.<\/p>\n

So if you too need to monitor your server’s interrupts\/sec, give my itop<\/a> a try. If you want to make changes, just fork it on github. Simple as that…I promise to merge any interesting changes\/pull requests you people send me!<\/p>\n

oh and here’s a screenshot of ‘itop -t’
\n\"\"<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

On a 24-core Linux machine I wanted to monitor interrupts\/sec. The reason is quite complicated, let’s say that there are more than 100.000 interrupts\/sec and I want to monitor who needs what. First I installed Debian’s itop package. It didn’t work at all on the 24-core machine, just showed an empty display. Then I tried […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"ep_exclude_from_search":false,"footnotes":""},"categories":[3],"tags":[33,485,484,483,595,48,482],"class_list":["post-1393","post","type-post","status-publish","format-standard","hentry","category-linux","tag-debian","tag-interrupts","tag-interrupts-per-second","tag-itop","tag-linux","tag-perl","tag-system-administration"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t