[ath9k-devel] rate set by fix_rate_idx and antenna set by tx_chainmask

[ath9k-devel] rate set by fix_rate_idx and antenna set by tx_chainmask

[wendy_life]

Excuse me again,shafi
I set antenna on/off by debugfs file "tx_chainmask", eg. echo 0x3>tx_chainmask. Am I right?
Other, I set certain MCS or bitrates by debugfs file "fix_rate_idx", eg. echo 0x7>fix_rate_idx,Am I rigth?
If that ,I can only get <30Mbps throughput.

OS version: Openwrt Backfire rc5
Driver for ath9k: compat-wireless-2011-06-22

Thanks a lot for reading my fuss question.



2011-10-19 



 Best Wishes~~
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[ath9k-devel] rate set by fix_rate_idx and antenna set by tx_chainmask

[Mohammed Shafi]

Hi Wendy,

please try to do see what is the throughput you get when you don't
change the chainmask and set only the fix_rate_idx.  usually higher
rates don't go properly with limited chain masks. i believe there is a
correlation between chain-mask and  higher rates. initially in ath9k
for legacy rates we used only one chain. later Felix changed stating
that having default chain mask stating that
"Restricting the chainmask to 1 for legacy mode disables useful features
 such as MRC, and it reduces the available transmit power".

not sure how minstrel works.
this 'fix rate index' is available only in minstrel rate control
debugfs (which OpenWrt  by default uses).
please do ask in OpenWrt list and Felix. they might provide you more help.

thanks,
shafi

On Wed, Oct 19, 2011 at 9:01 AM, wendy_life <wendy_life@yeah.net> wrote:
> Excuse me again,shafi
> I set antenna on/off by debugfs file "tx_chainmask", eg. echo
> 0x3>tx_chainmask. Am I right?
> Other, I set certain MCS or bitrates by debugfs file "fix_rate_idx",?eg.
> echo 0x7>fix_rate_idx,Am I rigth?
> If that ,I can only get <30Mbps throughput.
>
> OS version? Openwrt Backfire rc5
> Driver for ath9k? compat-wireless-2011-06-22
>
> Thanks a lot for reading my fuss question.
>
>
>
> 2011-10-19
> ________________________________
> ?Best Wishes~~
> _______________________________________________
> ath9k-devel mailing list
> ath9k-devel at lists.ath9k.org
> https://lists.ath9k.org/mailman/listinfo/ath9k-devel
>
>



-- 
shafi