[Trac #905] The libertas driver causes a 33% slowdown.

[Zarro Boogs per Child]

#905: The libertas driver causes a 33% slowdown.
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 Reporter:  cjb      |       Owner:  marcelo
     Type:  defect   |      Status:  new    
 Priority:  blocker  |   Milestone:  BTest-3
Component:  kernel   |    Keywords:         
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 As below:

 {{{
 bash-3.1# python pystone.py
 Pystone(1.1) time for 50000 passes = 38.92
 This machine benchmarks at 1284.69 pystones/second

 bash-3.1# mv /lib/firmware/usb8388.bin /lib/firmware/usb8388.bin.bak
 bash-3.1# rmmod usb8xxx
 bash-3.1# python pystone.py
 Pystone(1.1) time for 50000 passes = 28.73
 This machine benchmarks at 1740.34 pystones/second

 bash-3.1# mv /lib/firmware/usb8388.bin.bak /lib/firmware/usb8388.bin
 bash-3.1# modprobe usb8xxx
 bash-3.1# python pystone.py
 Pystone(1.1) time for 50000 passes = 39.01
 This machine benchmarks at 1281.72 pystones/second
 }}}

 The slowdown is consistent across all processes, not just python.

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Ticket URL: <http://dev.laptop.org/ticket/905>
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