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Re: poor performance with ath5k; reverting to ath_pci

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On Wed, Jan 21, 2009 at 4:14 PM, John W. Linville
<linville@xxxxxxxxxxxxx> wrote:
> On Tue, Jan 20, 2009 at 10:38:08PM -0500, Glenn Burkhardt wrote:
>> On Friday 16 January 2009 10:33:13 Bob Copeland wrote:
>> > On Thu, Jan 15, 2009 at 5:34 PM, Glenn Burkhardt
>> >
>> > <gbburkhardt@xxxxxxxxxxx> wrote:
>> > > ath5k_pci 0000:00:07.0: PCI INT A -> GSI 18 (level, low) -> IRQ 18
>> > > ath5k_pci 0000:00:07.0: registered as 'phy0'
>> > > phy0: Selected rate control algorithm 'pid'
>> >
>> > Can you change the rate control algorithm to minstrel and retry?
>>
>> I built a 2.6.28.1-9 kernel to get the minstrel code for ath5k.  The
>> kernel for Suse 11.1 is 2.6.27.7-9.  But that means that more could have
>> changed besides the rate control code.
>>
>> It looks like minstrel and pid give about the same result, a bit worse that
>> the ath_pci driver right now.  Performance seems to vary from day to day.
>> I'll experiment some more, and switch transmission channels.  I'm not getting
>> the really poor performance with ath5k right now.
>>
>> I haven't looked yet - is there a way to switch to 'pid' rate control without
>> rebuilding the kernel?
>
> If you configure your kernel to include multiple rate control
> algorithms then you can use the 'ieee80211_default_rc_algo' module
> option for mac80211.  Of course, changing that only works if you
> rmmod/insmod mac80211.
>
> John

Judging from this, is it really a good idea to hide pid behind EMBEDDED?

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