#7603 HIGH 8.2.0 (: 2.6.25 audio performance regression

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#7603: 2.6.25 audio performance regression
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   Reporter:  dsd       |       Owner:  dilinger                           
       Type:  defect    |      Status:  new                                
   Priority:  high      |   Milestone:  8.2.0 (was Update.2)               
  Component:  kernel    |     Version:  not specified                      
 Resolution:            |    Keywords:  joyride-2181:- 8.2.0:? blocks:8.2.0
Next_action:  diagnose  |    Verified:  0                                  
  Blockedby:            |    Blocking:                                     
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Comment(by veplaini):

 Replying to [comment:65 veplaini]:
 > Replying to [comment:62 cscott]:
 > > Could we also verify that the root cause is not sugar-performance-
 related?  There are a number of "Sugar takes up 100% cpu" type bugs
 floating around, and I'd like to be certain that this is not a dup of
 those.
 >
 > I am quite positive this is a kernel issue, unrelated to sugar. Graphics
 will play
 > a part in generating xruns, but only because the kernel cannot manage
 preemption
 > properly, IMHO.

 Also, it seems to be a well-known fact in audio developer's circles that
 there was a regression between 2.6.24 and 2.6.25 in terms of RT
 performance.

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Ticket URL: <http://dev.laptop.org/ticket/7603#comment:66>
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