On Thursday, 20 בDecember 2007, Oded Arbel wrote: > I haven't calculated diffs exactly yet, but on first glance it looks > like eth0 interrupts are happening at about 150 a second while cciss0 > interrupts are happening at about 20 per second.
Well, ~150 interrupts/seconds is very low interrupt rate and should not cause a significant load *unless* they are doing a heavy work in each interrupt. [as a reference, on a specific device family I work, we use a *minimum* of 1000 interrupts/second even on very low-end hosts. When we connect several devices on a bit stonger hosts (single cpu) we normally get around ~4000 interrupts/second] I still tend to suspect the disk controller although its interrupt rate is really low. Maybe you can test this (run some I/O bound process like 'find /' and see if it affects on the hardware interrupts load in top. If all else fails, than you may want to start using oprofile. Hope it helps, -- Oron Peled Voice/Fax: +972-4-8228492 [EMAIL PROTECTED] http://www.actcom.co.il/~oron ICQ UIN: 16527398 Free software: each person contributes a brick, but ultimately each person receives a house in return. -- Brendan Scott ================================================================To unsubscribe, send mail to [EMAIL PROTECTED] with the word "unsubscribe" in the message body, e.g., run the command echo unsubscribe | mail [EMAIL PROTECTED]
