hald causing stutters

Arjan van de Ven arjanv at redhat.com
Thu Mar 10 11:20:12 UTC 2005


On Thu, 2005-03-10 at 11:03 +0000, Richard Hughes wrote:
> Rodd Clarkson <rodd <at> clarkson.id.au> writes:
> > Watching my CPU use, I get a spike every 5 seconds (a cheap one thousand
> > and one, two thousand and two quess).
> > This is really quite annoying.  It's essentially a pause in your UI
> > every 5 seconds or so, including music that's playing and the likes.
> 
> Oops. The new acpi check code polls every 5 seconds to support laptops that
> don't give ACPI events. I'm not sure why the poll would cause such a massive
> chunk of CPU. David,

the BIOS can take however long it wants to report certain things.
Polling for battery can easily take a few dozen miliseconds. Asking more
complex stuff can take longer.
It's really better to never poll ;(
(I realize the user experience isnt great there if the bios is crippled,
but well.....)
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