Bad rtwn(0) performance with RTL8188CE on -CURRENT after r302035

[Andriy Voskoboinyk]

Mon, 27 Jun 2016 20:06:20 +0300 було написано Marcus von Appen  
<mva at freebsd.org>:

Hi,

the attached patch may fix this issue (probably)

> Hi,
>
> thanks to previous efforts, the rtwn(0) connection for my RTL8188CE
> wireless card is far more stable. It seems to come at the price of
> relatively bad performance, though. After r302035 from avos@, I
> can't get more than 500 kbit/s downstream from anywhere.

I don't think that this is a regression - that was already noted in PR  
203105:

> -Speed seems limited to 16Mbps rate (around 120 kbps on downstream),
> even though the ifconfig summary show 802.11g/56mbps.

>
> Let me know, what information is necessary to isolate and correct
> that issue. I'll gladly test it. :-)

You can check number of input errors (netstat -I wlan0); it should be
relatively small (or even zero).

>
> Cheers
> Marcus
-------------- next part --------------
A non-text attachment was scrubbed...
Name: patch-rtwn-rxfilter-busdma.diff
Type: application/octet-stream
Size: 1270 bytes
Desc: not available
URL: <http://lists.freebsd.org/pipermail/freebsd-wireless/attachments/20160627/b40e7834/attachment.obj>