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Re: Performance regression between Madwifi/net80211 and ath5k/mac80211

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On Wed, 2011-06-22 at 06:41 -0700, Joerg Pommnitz wrote:
> Adrian,
> thanks for taking an interest. Today I built the current Madwifi driver for
> Fedora Kernel 2.6.38.8-32.fc15.i686. The ath5k problem seems to be at the
> tx side. If I run the iperf server on the ath5k node and the iperf client
> at the madwifi node (identical hardware config), I consistently get a 
> significant
> speedup compared to ath5k-ath5k. The only difference is, which module is
> blacklisted.
> 
> I have experimented with the RTS and fragmentation threshold setting without
> success. 
> 
> Now I'm somewhat lost. The problem is either ath5k or mac80211. 

Do you see different CPU usage? Does it max out? If so can you profile
it?

johannes

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