Docunext

  • About

Powertop Details irqbalance and dynticks

April 2nd, 2009

I'm trying to get my laptop to be cooler. I've just run powertop and identified some processes which are keeping the CPU in an active state:

  41.9% ( 65.7)        : uhci_hcd:usb6, wifi0   17.9% ( 28.1)              java : futex_wait (hrtimer_wakeup)   13.3% ( 20.9)       firefox-bin : futex_wait (hrtimer_wakeup)   11.8% ( 18.5)        : extra timer interrupt 

Just out of curiosity, I've started up irqbalance to see if it would have any effect. Not so far, but I rmmod'ed uhci_hcd to calm that down a bit. If I need it, I'll modprobe it.

I'm downloading the source for 2.6.26-1-openvz-amd64 to see if it has dynticks enabled. I might recompile it with kernel irq balancing disabled.

UPDATE: It does have dynticks enabled.

Yearly Indexes: 2010 2003 2005 2006 2007 2008 2009 2004 2011 2012 2013 2015 2019 2020