Openmoko Bug #2320: icmp ping RTT over wifi plotted over time forms a sawtooth wave

[Openmoko Public Trac]

#2320: icmp ping RTT over wifi plotted over time forms a sawtooth wave
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 Reporter:  lindi            |          Owner:  openmoko-kernel    
     Type:  defect           |         Status:  new                
 Priority:  normal           |      Milestone:                     
Component:  System Software  |        Version:  unspecified        
 Severity:  normal           |       Keywords:  wifi latency kernel
 Haspatch:  0                |      Blockedby:                     
Estimated:                   |    Patchreview:                     
 Blocking:                   |   Reproducible:  always             
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Comment(by BillK):

 I should have posted a link as well as its a standard - basic explanation
 here:
 "http://features.techworld.com/mobile-wireless/4103/a-guide-to-wi-fi-
 power-save-technologies/"

 Contrary to article, powersaving can be quite large (as it is in the
 moko).  Downside is not only the effects you noticed, but inability to
 connect to some AP's, poor performance in general, poor(er) sensitivity in
 low signal conditions and "odd things happening with the link :)"

 Usually first thing I check when a laptop does not work well over wifi, as
 it seems to often be the cause of the trouble.

 BillK

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Ticket URL: <https://docs.openmoko.org/trac/ticket/2320#comment:4>
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