On Mon, Jun 06, 2011 at 10:58:52AM +0200, Stanislaw Gruszka wrote: > On Thu, May 26, 2011 at 07:50:42AM -0700, Guy, Wey-Yi wrote: > > On Thu, 2011-05-26 at 08:14 -0700, Stanislaw Gruszka wrote: > > > This patch fixes 802.11n stability and performance regression we have > > > since 2.6.35. It boost performance on my 5GHz N-only network from about > > > 5MB/s to 8MB/s. Similar percentage boost can be observed on 2.4 GHz. > > > > > > These are test results of 5x downloading of approximately 700MB iso > > > image: > > > > > > vanilla: 5.27 5.22 4.94 4.47 5.31 ; avr 5.0420 std 0.35110 > > > patched: 8.07 7.95 8.06 7.99 7.96 ; avr 8.0060 std 0.055946 > > > > > > This was achieved with NetworkManager configured to do not perform > > > periodical scans, by configuring constant BSSID. With periodical scans, > > > after some time, performance downgrade to unpatched driver level, like > > > in example below: > > > > > > patched: 7.40 7.61 4.28 4.37 4.80 avr 5.6920 std 1.6683 > > > > > > However patch still make better here, since similar test on unpatched > > > driver make link disconnects with below messages after some time: > > > > > > wlan1: authenticate with 00:23:69:35:d1:3f (try 1) > > > wlan1: authenticate with 00:23:69:35:d1:3f (try 2) > > > wlan1: authenticate with 00:23:69:35:d1:3f (try 3) > > > wlan1: authentication with 00:23:69:35:d1:3f timed out > > > > > > On 2.6.35 kernel patch helps against connection hangs with messages: > > > > > > iwlagn 0000:20:00.0: queue 10 stuck 3 time. Fw reload. > > > iwlagn 0000:20:00.0: On demand firmware reload > > > iwlagn 0000:20:00.0: Stopping AGG while state not ON or starting > > > > > > Cc: stable@xxxxxxxxxx # 2.6.35+ > > > Signed-off-by: Stanislaw Gruszka <sgruszka@xxxxxxxxxx> > > Acked-by: Wey-Yi Guy <wey-yi.w.guy@xxxxxxxxx> > > John, can you apply that patch and push upstream? Or should I > repost? I want backport it to Fedora 2.6.35 as it fixes random > 11n connection hangs there (common F-14 bug). Sorry, I was waiting to see if Daniel was going to reply further... John -- John W. Linville Someday the world will need a hero, and you linville@xxxxxxxxxxxxx might be all we have. Be ready. -- 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
