#7603 NORM 8.2.0 (: 2.6.25 audio performance regression

[Zarro Boogs per Child]

#7603: 2.6.25 audio performance regression
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   Reporter:  dsd        |       Owner:  dilinger              
       Type:  defect     |      Status:  new                   
   Priority:  normal     |   Milestone:  8.2.0 (was Update.2)  
  Component:  kernel     |     Version:  not specified         
 Resolution:             |    Keywords:  joyride-2181:- 8.2.0:?
Next_action:  never set  |    Verified:  0                     
  Blockedby:             |    Blocking:                        
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Comment(by dsaxena):

 Replying to [comment:17 dsd]:
 > On my XO with those HAL patches applied, I am still getting a lot of
 underruns on 2.6.25 but not on 2.6.22.
 >
 > I quantified this by running tamtam and playing a drum beat (increasing
 beats per bar and randomness to about 75%) for approximately one minute,
 while logging stdout. Then I grep for how many underruns occurred. I
 repeated 3 times for each kernel.
 >
 > On 2.6.25: 99, 83, 96 (average 93 underruns)
 > On 2.6.22: 17, 10, 11 (average 13 underruns)

 Can you run top in another terminal and see what else is happening?

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Ticket URL: <http://dev.laptop.org/ticket/7603#comment:18>
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