On Mon, Jan 05, 2009 at 04:25:58PM +0100, Felix Fietkau wrote:
> > Forcing the rates works somewhat, but the link quality is very poor
> > (10-15/100) and fluctuates.
> Another possibility is that the tx power is fine, but the
> sensitivity of the card is crap, so the packets actually make it,
Ok, but I see the same thing with two different cards, with different
chipsets (RaLink and RealTek). You think they both have that problem?
> Even if both cards work fine on Windows, I wouldn't assume that this
> is an issue with mac80211. The information that was used to write
> these two drivers was derived from very poor vendor codebases and
> limited information in datasheets, so it's much more likely that
> simply the Baseband/RF tuning is far from optimal on both cards.
Ok I won't try then. Setting up Windows would be quite a lot of
effort and I would prefer to avoid it.
> Maybe we can see more if you provide some minstrel stats after
> you've pushed more traffic through the link - 25-50 packets is not
> nearly enough for getting an accurate view of how good the link is.
> Try to push through a few megabytes of data...
Here are the statistics after a few MB.
rate throughput ewma prob this prob this succ/attempt success attempts
TtP 1 0.9 97.9 100.0 1( 1) 19284 21249
2 0.0 0.0 0.0 0( 0) 0 101
5.5 0.0 0.0 0.0 0( 0) 0 104
11 0.0 0.0 0.0 0( 0) 253 397
6 0.0 0.0 0.0 0( 0) 0 103
9 0.0 0.0 0.0 0( 0) 0 106
12 0.0 0.0 0.0 0( 0) 0 107
18 0.0 0.0 0.0 0( 0) 0 104
24 0.0 0.0 0.0 0( 0) 0 111
36 0.0 0.0 0.0 0( 0) 0 120
48 0.0 0.0 0.0 0( 0) 0 179
54 0.0 0.0 0.0 0( 0) 0 253
Total packet count:: ideal 9023 lookaround 474
-Andi
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