On Dec 8, 2011, at 10:34 AM, Rafał Miłecki wrote: > W dniu 8 grudnia 2011 10:21 użytkownik > <francesco.gring...@ing.unibs.it> napisał: >> >> On Dec 7, 2011, at 1:01 PM, Rafał Miłecki wrote: >> >>> W dniu 5 grudnia 2011 21:39 użytkownik Rafał Miłecki <zaj...@gmail.com> >>> napisał: >>>> W dniu 29 listopada 2011 22:36 użytkownik Rafał Miłecki >>>> <zaj...@gmail.com> napisał: >>>>> I'll give it a rest and will try in next days again. >>>> >>>> It really seems it's something spur avoidance related (and so most >>>> probably CC PLL related). After applying my patch implementing SPUR >>>> avoidance, card stops receiving anything. I'll dig more around it. >>> >>> I've found bug in my implementation and fixed it. Today evening I'll >>> test if my patch fixes performance anyhow (I need physical access). >> Rafal, >> >> I did some mmio traces and checked what happens when changing txpower. >> >> 1) values in N-PHY tables 0x1A and 0x1B are changed, e.g., for txpower 5 and >> txpower 10 they are the same, for txpower 15 they are different so I guess >> there exist thresholds. Unfortunately I don't even know what these tables >> are. >> >> 2) value in PHY register 0x1ea is changed according to the configured power >> value. As I can read in specs this is the TX power control target power for >> both radios: e.g., for txpower 5 => 0x2020, for txpower 10 => 0x2c2c, for >> txpower 15 => 0x3c3c. >> >> Then I switched to b43 and load a custom firmware to analyze how register >> 0x1ea is setup and it holds always 0x0000. I forced it to be 0x2c2c and >> magically the throughput increased to ~ 3Mb/s. Unfortunately when I try >> 0x3c3c (corresponding to txpower 15) I get only phy-transmission errors. > > I can see a lot of differences between wl and b43, a lot to validate&test. > > Do you have some magic scripts for parsing MMIO dumps? I hope you do, > otherwise it's impossible to analyze that ;) > > You can try adding > nphy->txpwrctrl = true; > in function b43_nphy_op_prepare_structs if you wish test something > right now. I've noticed this missing part today morning, but won't > able to test until evening. > Hi Rafal,
great! I applied all the last patches you sent and the throughput now grows during an iperf experiment. Unfortunately, if to a given AP I can get up to 17-18Mb/s from a 4318, my 43224 never exceeds 5Mb/s :-( Are you experiencing something similar? Many thanks, -Francesco _______________________________________________ b43-dev mailing list b43-dev@lists.infradead.org http://lists.infradead.org/mailman/listinfo/b43-dev
