Hi,
I have AR9285 card on a netbook and I am using the latest compat-wirless drivers from http://wireless.kernel.org/download/compat-wireless-2.6/compat-wireless-2.6.tar.bz2
I am trying to use PS POLL on the ath9k driver, So I applied this
http://kernel.org/pub/linux/kernel/people/mcgrof/patches/ath9k/2009-12-08/ath9k-ps-enable.patch
patch from here on top of latest compat-wireless.
I have tried to use only pspoll without mac80211's dynamic_ps_timeout by setting the dynamic_ps_timeout to 0.
using
iwconfig wlan0 power timeout 0
iwconfig wlan0 power on.
I do not have any connection problems with this setup (as reported by others http://bugzilla.kernel.org/show_bug.cgi?id=14267) but I find that the performance is very slow.
for example with the same wep AP, I get around 150 to 200 Kbps without enabling ps poll. but if I enable ps poll with the above settings, I get only around 20 Kbps and the packet loss is around 20 to 30%.
My question is, is this the expected speed drop when turning on ps poll ? Or is this a problem with the driver that still needs to be addressed ?
I did enable ATH_DBG_PS and the ps poll sequence seems to going well ( detecting aid in tim, sending ps poll frame, picking buffered frames , going back to sleep).
I have also verified that the following patchset is already applied on the latest compat-wireless that I am trying. Unfortunately I am stuck with a 2.6.27 kernel and cannot test the latest wireless testing tree.
http://kernel.org/pub/linux/kernel/people/mcgrof/patches/ath9k/2009-12-08/for-2.6.32/
Any help will be highly appreciated.
Here is the lspci -vv of my ath9k card Please let me know if any other information is needed.
05:00.0 Network controller: Atheros Communications Inc. Device 002b (rev 01)
Subsystem: Askey Computer Corp. Device 7167
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR+ FastB2B- DisINTx-
Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR+ <PERR- INTx-
Latency: 0, Cache Line Size: 32 bytes
Interrupt: pin A routed to IRQ 16
Region 0: Memory at f0100000 (64-bit, non-prefetchable) [size=64K]
Capabilities: [40] Power Management version 3
Flags: PMEClk- DSI- D1+ D2- AuxCurrent=375mA PME(D0+,D1+,D2-,D3hot+,D3cold-)
Status: D0 PME-Enable- DSel=0 DScale=0 PME-
Capabilities: [50] Message Signalled Interrupts: Mask- 64bit- Count=1/1 Enable-
Address: 00000000 Data: 0000
Capabilities: [60] Express (v2) Legacy Endpoint, MSI 00
DevCap: MaxPayload 128 bytes, PhantFunc 0, Latency L0s <512ns, L1 <64us
ExtTag- AttnBtn- AttnInd- PwrInd- RBE+ FLReset-
DevCtl: Report errors: Correctable- Non-Fatal- Fatal- Unsupported-
RlxdOrd+ ExtTag- PhantFunc- AuxPwr- NoSnoop-
MaxPayload 128 bytes, MaxReadReq 512 bytes
DevSta: CorrErr+ UncorrErr+ FatalErr- UnsuppReq+ AuxPwr- TransPend-
LnkCap: Port #0, Speed 2.5GT/s, Width x1, ASPM L0s L1, Latency L0 <512ns, L1 <64us
ClockPM- Suprise- LLActRep- BwNot-
LnkCtl: ASPM L1 Enabled; RCB 64 bytes Disabled- Retrain- CommClk+
ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt-
LnkSta: Speed 2.5GT/s, Width x1, TrErr- Train- SlotClk+ DLActive- BWMgmt- ABWMgmt-
DevCap2: Completion Timeout: Not Supported, TimeoutDis+
DevCtl2: Completion Timeout: 50us to 50ms, TimeoutDis-
LnkCtl2: Target Link Speed: 2.5GT/s, EnterCompliance- SpeedDis-, Selectable De-emphasis: -6dB
Transmit Margin: Normal Operating Range, EnterModifiedCompliance- ComplianceSOS-
Compliance De-emphasis: -6dB
LnkSta2: Current De-emphasis Level: -6dB
Kernel driver in use: ath9k
Regards,
Satanand
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