Search Linux Wireless

Re: [rt2x00-users] Poor performance and lockup with rt2800usb and Asus USB-N13 adapter

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On Thu, Dec 22, 2011 at 10:18 AM, Stanislaw Gruszka <sgruszka@xxxxxxxxxx> wrote:
> On Tue, Dec 20, 2011 at 03:43:17PM +0100, Stanislaw Gruszka wrote:
>> I just discovered that at least some problems are related with power
>> save. After "iwconfig wlanX power off" I have pretty short ping times
>> and good throughput, both comparable with vendor driver. But I did not
>> check that on all adapters that I have yet.
>>
>> Looking a bit more at that seem we stop and wake queues several times
>> between sending each frame. Looks like that thing need to be optimized
>> in mac80211, or some parameters have to be setup properly by rt2x00 ...
>>
>> Also rt2800 PCI and SOC have PS disabled by default ...
>
> There is no bug with ping latencies when power save is enabled. Ping
> send packet every second, between that we put driver in power save
> mode (i.e. tell AP that we are sleeping and it has to buffer frame
> to us). When we send ping packet, we wake up and receive packet from
> a AP after longer time than in normal operation mode.
>
> I did more testing here and I have one device that works very bad,
> no matter if PS is configured or not. It is
>
> phy6 -> rt2x00_set_chip: Info - Chipset detected - rt: 3071, rf: 0008, rev: 021c.
>
> I'm going to investigate problems with that device, hopefully these are the
> same problems that Robert and Andreas have.
>
> Stanislaw

I confirmed that switching off power save doesn't improve the
performance significantly with the Asus USB-N13. I suspect that there
must be some difference between the 3070 device and the 3071/3072 that
affects this, since the 3070 device I have works much better.
--
To unsubscribe from this list: send the line "unsubscribe linux-wireless" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html


[Index of Archives]     [Linux Host AP]     [ATH6KL]     [Linux Bluetooth]     [Linux Netdev]     [Kernel Newbies]     [Linux Kernel]     [IDE]     [Security]     [Git]     [Netfilter]     [Bugtraq]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Linux ATA RAID]     [Samba]     [Device Mapper]
  Powered by Linux