From mboxrd@z Thu Jan 1 00:00:00 1970 From: Luis R. Rodriguez Date: Mon, 18 May 2009 13:05:03 -0700 Subject: [ath9k-devel] Linksys WPC300N Wireless-N Notebook Adapter In-Reply-To: <200132.98816.qm@web57903.mail.re3.yahoo.com> References: <200132.98816.qm@web57903.mail.re3.yahoo.com> Message-ID: <20090518200503.GN20637@tesla> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: ath9k-devel@lists.ath9k.org On Mon, May 18, 2009 at 12:35:13PM -0700, hong zhang wrote: > > > > --- On Mon, 5/18/09, Luis R. Rodriguez wrote: > > > From: Luis R. Rodriguez > > Subject: Re: [ath9k-devel] Linksys WPC300N Wireless-N Notebook Adapter > > To: "hong zhang" > > Cc: "Luis Rodriguez" , "Luis R. Rodriguez" , "ath9k-devel at lists.ath9k.org" , "Johannes Berg" > > Date: Monday, May 18, 2009, 12:33 PM > > On Mon, May 18, 2009 at 09:36:43AM > > -0700, hong zhang wrote: > > > > > > Luis, > > > > > > 1. Does ath9k Tx/Rx buffer packets for power save > > purpose? > > > > You mean in AP mode? If you are on a kernel >= 2.6.29 > > yes. That is > > even if you are using compat-wireless you need at least > > 2.6.29 still. > > > > > 2. Do TX power and signal level display go same path > > to mac80211 > > >? through rate control interface? > > > > I don't understand your question. > > > > > I think iw dev wlan0 station should > > >? display Tx power and signal level as > > well. > > > > 'iw dev wlan0 station dump' does display signal. I get: > > > > mcgrof at tesla ~ $ iw dev wlan2 station dump > > Station 00:0b:85:5b:8d:6c (on wlan2) > > inactive time: 22628 ms > > rx bytes: > > 3042422 > > rx packets: > > 13165 > > tx bytes: > > 177786 > > tx packets: > > 947 > > signal: > > -30 dBm > > tx bitrate: > > 54.0 MBit/s > > > If signal -30dBm is Tx power on a channel, why the channel number is not displayed here? That's seems reasoanble, patches are welcomed. Luis > > > > Keep in mind wireless extensions added a 'quality' term > > which > > unfortunately was used differently between drivers. What we > > add to > > nl80211 should remain consistant accross drivers and it > > should be > > defined properly. If there is some enhancement to this > > reporting which > > you can think of please feel free to address this on > > linux-wireless > > with your recommendation. The next best thing we have to > > report > > signal would be through using the RCPI concept [1], but > > note that it > > specifically defines it as "the received RF power in the > > channel measured > > over the entire received frame or by other equivalent means > > which meet the > > specified accuracy". The last part is a little vague, that > > of > > "or by other equivalent means which meet the specified > > accuracy" and > > its questionable whether or not all devices support this. > > Anyway > > this could just be used by userspace and nl80211 should not > > have to know > > about this except maybe whether or not the device claims to > > support > > this accuracy terminology, I am also not sure what the > > status of 802.11k > > is which the group working on this, so it may be premature > > to just add > > it to nl80211/cfg80211. > > > > [1] http://www.spinics.net/lists/netdev/msg12028.html > > > > Patches are welcomed to add tx power displaying, not sure > > why we didn't > > add that. > > > > Luis > > > > > > > > > > > ---henry > > > > > > --- On Mon, 5/18/09, Luis R. Rodriguez > > wrote: > > > > > > > From: Luis R. Rodriguez > > > > Subject: Re: [ath9k-devel] Linksys WPC300N > > Wireless-N Notebook Adapter > > > > To: "hong zhang" > > > > Cc: "Luis R. Rodriguez" , > > "ath9k-devel at lists.ath9k.org" > > > > > > Date: Monday, May 18, 2009, 10:41 AM > > > > On Sat, May 16, 2009 at 10:51:57PM > > > > -0700, hong zhang wrote: > > > > > > > > > > Luis, > > > > > > > > > > Have you experience XJperf (windows graphic > > version > > > > iperf) to measure UDP/TCP throughput? I think it > > does not > > > > work properly because UDP throughput is always > > 1Mbites/s. > > > > > > > > No, thanfully I don't have a windows box anywhere > > near my > > > > home or office, > > > > that's just a serious security risk. But I see > > xjperf runs > > > > in Linux, I'll give > > > > it a shot some time. > > > > > > > > > Also, does "iw dev ath0 station dump" > > display bit rate > > > > (I have not tested my WPC300N yet)? > > > > > > > > Right now ath9k does not report the proper 11n > > rate, that > > > > work needs a > > > > decent rewrite on rate handling in ath9k. For now > > please > > > > use the ath9k > > > > debugfs file, rcstat. That'll show you counters > > for every > > > > MCS rate. > > > > > > > >???Luis > > > > > > > > > > > > > > > > > >