Boblightd on Raspberry with spidev (ws2801 led strand) uses too much cpu.

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What steps will reproduce the problem?
1. Setup boblightd on Raspberry Pi with spidev device and connect ws2801 led 
strand
2. Connect remote via boblight-x11 or xbmc-boblight addon to boblightd
3. Under x11 do nothing, in xbmc pause video

What is the expected output? What do you see instead?
The light should not change color or do anything. Instead i see permanent 
flickering

What version of the product are you using? On what operating system?
Rapbian:
Linux boblight 3.6.11+ #366 PREEMPT Wed Jan 30 12:59:10 GMT 2013 armv6l 
GNU/Linux

Please provide any additional information below.
The Load is above 2.00 (since the raspberry pi has one cpu, it is high)

I think boblight and the network interfaces uses too much cpu power so that 
boblight can't send the required data via the spi devices and the ws2801 strips 
start flickering.

Original issue reported on code.google.com by [email protected] on 8 Feb 2013 at 6:16