On Tue, 2019-03-12 at 21:38 +0200, Luciano Coelho wrote: > Hi Kevin, > > Johannes (johill) is also in this list. :) > > If this feature was explicitly disabled, it certainly means that > something was causing problems with it, so I'd be wary to enable it > for > all DVM devices. > > I guess we could enable it by default for devices that work fine, but > we would have to run it in real life for a lot longer with a lot more > different APs to be sure it won't cause any problems. > > Emmanuel, do you happen to remember what was the issue, so Kevin > could > test that specific scenario with this specific NIC? long long nights of despair. We had issues with reclaim path upon BACK. This is of course a firmware problem... > > Kevin, meanwhile you could add the option to your default module > configuration so it would be used by default on your machine. > > -- > Cheers, > Luca. > > > On Tue, 2019-03-12 at 11:12 -0600, Kevin Locke wrote: > > Hi Wireless Developers, > > > > I have a Lenovo ThinkPad T430 (2342-CTO) with an Intel Centrino > > Ultimate-N 6300 (8086:4238) wireless card. With the help of > > Reventlov > > and johill on #linux-wireless, we discovered that enabling TX > > AMPDU, > > by passing module option 11n_disable=8 (IWL_ENABLE_HT_TXAGG) to > > iwlwifi, increased TCP throughput significantly: > > > > With an ASUS RT-ACRH13 AP and `iperf3 -s` running on a server with > > a > > 1Gbps wired connection, `iperf3 -R -c` on the ThinkPad increased > > from > > 63.2 to 104 Mbits/sec (using MCS 15 40MHz short GI). With a > > Buffalo > > WZR-600DHP running OpenWRT, `iperf3 -R -c` increased from 63.2 to > > 76.9. > > > > TX AMPDU was disabled by default for all iwldvm cards in > > 205e2210daa9 > > because "iwldvm don't handle well TX AMPDU". However, I have been > > using this configuration for >2 weeks without any issues or > > measurable > > change in ping times to the AP. Are there any other potential > > side-effects I can check? > > > > Would it be possible to enable TX AMPDU by default for at least > > some > > of these cards? If so, what additional information would be > > required? > > > > Thanks for considering, > > Kevin > > ------------------------------------- > > linuxwifi@xxxxxxxxxxxxxxxxx > > https://eclists.intel.com/sympa/info/linuxwifi > > Unsubscribe by sending email to sympa@xxxxxxxxxxxxxxxxx with > > subject > > "Unsubscribe linuxwifi" > >
