WLAN getting slower over time.

Question

If I download arch iso from my local server via scp, the connection begins with a speed of 2-3 MB/s, and slows permanently down until it reached 80Kb/s. If I do the same over Fast Ethernet, I get  constant 11.3 MB/s. I have this problem on my router (701V) as well as on my accesspoint (WL0110), with wicd as well as with networkmanager. Hence I guess it is a driver problem.
I dont have any clue on how to solve this problem. Here some Info. Please ask if you need more.
~$ lspci
00:00.0 Host bridge: Intel Corporation Mobile 4 Series Chipset Memory Controller Hub (rev 07)
00:02.0 VGA compatible controller: Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller (rev 07)
00:02.1 Display controller: Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller (rev 07)
00:1a.0 USB controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #4 (rev 03)
00:1a.7 USB controller: Intel Corporation 82801I (ICH9 Family) USB2 EHCI Controller #2 (rev 03)
00:1b.0 Audio device: Intel Corporation 82801I (ICH9 Family) HD Audio Controller (rev 03)
00:1c.0 PCI bridge: Intel Corporation 82801I (ICH9 Family) PCI Express Port 1 (rev 03)
00:1c.3 PCI bridge: Intel Corporation 82801I (ICH9 Family) PCI Express Port 4 (rev 03)
00:1d.0 USB controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #1 (rev 03)
00:1d.1 USB controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #2 (rev 03)
00:1d.2 USB controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #3 (rev 03)
00:1d.7 USB controller: Intel Corporation 82801I (ICH9 Family) USB2 EHCI Controller #1 (rev 03)
00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev 93)
00:1f.0 ISA bridge: Intel Corporation ICH9M-E LPC Interface Controller (rev 03)
00:1f.2 SATA controller: Intel Corporation 82801IBM/IEM (ICH9M/ICH9M-E) 4 port SATA Controller [AHCI mode] (rev 03)
00:1f.3 SMBus: Intel Corporation 82801I (ICH9 Family) SMBus Controller (rev 03)
01:00.0 Ethernet controller: Qualcomm Atheros AR8131 Gigabit Ethernet (rev c0)
02:00.0 Network controller: Intel Corporation Centrino Wireless-N 1000 [Condor Peak]
~$ iwconfig
wlp2s0 IEEE 802.11bgn ESSID:"Home2"
Mode:Managed Frequency:2.462 GHz Access Point: XX:XX:XX:XX:XX:XX
Bit Rate=6 Mb/s Tx-Power=14 dBm
Retry long limit:7 RTS thr:off Fragment thr:off
Power Management:off
Link Quality=57/70 Signal level=-53 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:72220 Invalid misc:963 Missed beacon:0
~$ cd /sys/module/iwlwifi/parameters
/sys/module/iwlwifi/parameters $ modinfo iwlwifi | grep parm | while read X;do echo $X; Y=${X#*: }; Z=${Y%%:*}; cat $Z ;done
parm: swcrypto:using crypto in software (default 0 [hardware]) (int)
0
parm: 11n_disable:disable 11n functionality, bitmap: 1: full, 2: agg TX, 4: agg RX (uint)
0
parm: amsdu_size_8K:enable 8K amsdu size (default 0) (int)
0
parm: fw_restart:restart firmware in case of error (int)
1
parm: antenna_coupling:specify antenna coupling in dB (defualt: 0 dB) (int)
0
parm: bt_ch_inhibition:Enable BT channel inhibition (default: enable) (bool)
Y
parm: plcp_check:Check plcp health (default: 1 [enabled]) (bool)
Y
parm: wd_disable:Disable stuck queue watchdog timer 0=system default, 1=disable, 2=enable (default: 0) (int)
1
parm: bt_coex_active:enable wifi/bt co-exist (default: enable) (bool)
Y
parm: led_mode:0=system default, 1=On(RF On)/Off(RF Off), 2=blinking, 3=Off (default: 0) (int)
0
parm: power_save:enable WiFi power management (default: disable) (bool)
N
parm: power_level:default power save level (range from 1 - 5, default: 1) (int)
0
parm: auto_agg:enable agg w/o check traffic load (default: enable) (bool)
Y
parm: 5ghz_disable:disable 5GHz band (default: 0 [enabled]) (bool)
N
Last edited by manuelschneid3r (2013-05-18 17:44:18)

Answer 1

This is what I believe is happening.  I don't see what I might not be freeing.  I remove all event listeners and remove the TextFields from the display list.  Is there anything else I need to do?
Currently I am displaying the frame rate.  I see a frame rate starting at 30 and going down to 8 after several hours.
I also just started to display the memory:
tf.text = Number( System.totalMemory / 1024 / 1024 ).toFixed( 2 ) +' Mb';
I am interested to see if when the FPS goes down to < 10, if the memory is much larger.
Are there any tools that might help debug what might be happening?