# Intr process on freebsd **URL:** \ **Category:** NGINX\ **Created:** [July 5, 2011, 10:39am UTC](https://www.ruby-forum.com/t/intr-process-on-freebsd/209077 "2011-07-05T10:39:04Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![dubstep](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/d/cdc98d/32.png) [@dubstep](https://www.ruby-forum.com/u/dubstep)\ **Post date:** [July 5, 2011, 10:39am UTC](https://www.ruby-forum.com/t/intr-process-on-freebsd/209077/1 "2011-07-05T10:39:04Z")
Hi I am currently investigating moving our platform from linux to freebsd On my test server I can see an increase in cpu usage compared to linux (specifically system cpu% rather than user%) On further investigation, it is the “intr” process using a lot of cpu. Nginx is running ~100 req/sec Is this normal behaviour and could anyone further describe what’s going on/is this normal etc? 12 root 19 -60 - 0K 304K WAIT 0 55:24 7.32% intr ---
**Author:** ![rkoskela](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/r/ce73a5/32.png) [@rkoskela](https://www.ruby-forum.com/u/rkoskela)\ **Post date:** [July 5, 2011, 11:05am UTC](https://www.ruby-forum.com/t/intr-process-on-freebsd/209077/2 "2011-07-05T11:05:40Z")
Hello! On Tue, Jul 05, 2011 at 08:38:47AM +0000, Richard K. wrote: > Hi > I am currently investigating moving our platform from linux to freebsd > On my test server I can see an increase in cpu usage compared to linux > (specifically system cpu% rather than user%) > On further investigation, it is the “intr” process using a lot of cpu. Nginx is > running ~100 req/sec > Is this normal behaviour and could anyone further describe what’s going on/is > this normal etc? > > 12 root 19 -60 - 0K 304K WAIT 0 55:24 7.32% intr Try pressing ‘H’ in top to see separate threads, this should give you a hint who eats cpu. 8% system at 100r/s seems a bit too many for me, too. But I really doubt it’s nginx related. Maxim D. ---
**Author:** ![rkoskela](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/r/ce73a5/32.png) [@rkoskela](https://www.ruby-forum.com/u/rkoskela)\ **Post date:** [July 5, 2011, 11:29am UTC](https://www.ruby-forum.com/t/intr-process-on-freebsd/209077/3 "2011-07-05T11:29:44Z")
Hmm, it’s the Ethernet 12 root -68 - 0K 288K WAIT 2 0:37 5.66% {irq256: bge0} What could this mean? ---
**Author:** ![rkoskela](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/r/ce73a5/32.png) [@rkoskela](https://www.ruby-forum.com/u/rkoskela)\ **Post date:** [July 5, 2011, 12:47pm UTC](https://www.ruby-forum.com/t/intr-process-on-freebsd/209077/4 "2011-07-05T12:47:39Z")
Hello! On Tue, Jul 05, 2011 at 09:29:13AM +0000, Richard K. wrote: > Hmm, it’s the Ethernet > 12 root -68 - 0K 288K WAIT 2 0:37 5.66% {irq256: bge0} > > What could this mean? With default settings it shows not only ethernet costs but also all incoming packet processing costs. You may try setting net.isr.direct and net.isr.direct\_force to 0 to see what actually takes cpu time, and playing with various network settings (including net.isr.\*) to see if it would be possible to reduce load in your case. Maxim D.