Le 02/13/12 14:45, Helmut Schaa a écrit :
Hi,
On Mon, Feb 13, 2012 at 2:23 PM, Florian Fainelli<florian@xxxxxxxxxxx> wrote:
I am playing with a RT2880-F based AP, with a N connected station, in a
residential environment.
Mind to provide the RF and RT chipset identifications? rt2x00 should print them
out during module load (at least when compiled with debugging options).
Sure, here are the HW infos of the AP:
Ralink RT2880 id:1 rev:1 running at 266.66 MHz
phy0 -> rt2x00_set_chip: Info - Chipset detected - rt: 2860, rf: 0001,
rev: 0101.
The station is an AR5418 ath9k card 2x2.
I could not get more than 26Mbits/sec TCP performance using iperf on both
sides,
Did aggregation kick in? What rate was selected by the AP?
Does it print anything when it does? The station dump gives me:
Station 00:1d:7d:45:53:99 (on wlan0)
inactive time: 12670 ms
rx bytes: 44578225
rx packets: 29117
tx bytes: 1116274
tx packets: 13560
tx retries: 9148
tx failed: 890
signal: -54 dBm
signal avg: -53 dBm
tx bitrate: 117.0 MBit/s MCS 14
rx bitrate: 130.0 MBit/s MCS 15
authorized: yes
authenticated: yes
preamble: short
WMM/WME: yes
MFP: no
TDLS peer: no
changing to a busier channel even made the performance drop down to
5Mbits/sec, and remained like this.
Andreas also reported some issues as soon as the environment gets noisy,
not sure what the root cause for this is :(
The original firmware gives me roughly 75Mbits/sec in HT20 and
89/Mbits/sec in HT40+. The CPU is 66% idle during the transfers.
--
Florian
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