On Friday 22 June 2007 19:09:41 Larry Finger wrote: > Michael, > > I have now gotten some fairly reproducible iperf results with the latest > version from your tree > using my BCM4311. In general, the transmission rate is higher than the > receive rate. In addition, it > is much more consistent. While receiving, I might get a rate of 2 Mbs, but > the next several are > likely to be 50 Kbs, or less. The other thing I note is that I get no > throughput for speeds that use > OFDM. > > Using my code for setting and fixing the rate, I get the following > transmission rates: > > Rate Set Iperf Rate > > 1 Mbs 1.24 Mbs > 2 2.01 > 5.5 4.13 > 11 6.58 > > My tx_power settings are as follows: > > larrylap:~ # cat /sys/kernel/debug/bcm43xx_mac80211/phy0/tx_power_g > Control: AUTOMATIC > Baseband attenuation: 0 > Radio attenuation: 3 > TX Mixer Gain: OFF > PA Gain 2dB: OFF > PA Gain 3dB: OFF > > I get the following with tx_power debugging turned on: > > bcm43xx_mac80211: Current TX power output: 19.0 dBm, Desired TX power output: > 18.50 dBm > bcm43xx_mac80211: Tuning TX-power to bbatt(0), rfatt(3), tx_control(0x00), > tx_bias(0x00), tx_magn(0x00) > > Are there any specific settings for tx_power_g that you would like me to try?
Nothing specific. Just play around with it a little bit. Try setting maximum and minimum attenuation settings. Try to enable/disable the various gains, etc... Maximum is set by simply setting some big value such as 99. It will clamp that into range then. Also try the UDP mode of iperf. As with TCP mode TX might bias the RX results. -- Greetings Michael. _______________________________________________ Bcm43xx-dev mailing list [email protected] https://lists.berlios.de/mailman/listinfo/bcm43xx-dev
