Hi. I'm trying to get 802.11n working with followed card: 02:00.0 Network controller: Intel Corporation WiFi Link 5100 It's inside ASUS F6A laptop. I'm connecting it to another machine with: 01:00.0 Network controller: Atheros Communications Inc. AR5008 Wireless Network Adapter (rev 01) Atheros card is in AP mode (with hostapd). And just after connecting I'm getting followed messages: [132378.252140] iwlagn 0000:02:00.0: iwlagn_tx_agg_start on ra = 00:21:91:f3:c8:a1 tid = 0 [132404.533559] iwlagn 0000:02:00.0: Aggregation not enabled for tid 0 because load = 3 [132427.820093] iwlagn 0000:02:00.0: iwlagn_tx_agg_start on ra = 00:21:91:f3:c8:a1 tid = 0 [132445.826017] iwlagn 0000:02:00.0: Aggregation not enabled for tid 0 because load = 1 [132448.868061] iwlagn 0000:02:00.0: iwlagn_tx_agg_start on ra = 00:21:91:f3:c8:a1 tid = 0 [132472.781121] iwlagn 0000:02:00.0: Aggregation not enabled for tid 0 because load = 0 [132479.995679] iwlagn 0000:02:00.0: Aggregation not enabled for tid 0 because load = 9 [132482.848072] iwlagn 0000:02:00.0: iwlagn_tx_agg_start on ra = 00:21:91:f3:c8:a1 tid = 0 [132505.042703] iwlagn 0000:02:00.0: Aggregation not enabled for tid 0 because load = 0 [132532.848067] iwlagn 0000:02:00.0: iwlagn_tx_agg_start on ra = 00:21:91:f3:c8:a1 tid = 0 [132551.187911] iwlagn 0000:02:00.0: Aggregation not enabled for tid 0 because load = 0 I'm gettint something around 2.5Mbyte/sec while downloading some large file (fully intranet). Preinstalled Windows Vista is able to download same file at 5-6 mb/sec.
looks like the rate scale algor. believe the traffic is not high enough to trigger the HT. what kernel version you are using? Wey
It's 3.0 on laptop (with intel card) and 2.6.39 on "server" (with atheros). If you are talking about "load" then rarely it becames 10: [133484.288110] iwlagn 0000:02:00.0: Aggregation not enabled for tid 0 because load = 7 [133489.629618] iwlagn 0000:02:00.0: Aggregation not enabled for tid 0 because load = 6 [133493.258147] iwlagn 0000:02:00.0: Aggregation not enabled for tid 0 because load = 10 [133499.604734] iwlagn 0000:02:00.0: Aggregation not enabled for tid 0 because load = 1 [133507.886679] iwlagn 0000:02:00.0: Aggregation not enabled for tid 0 because load = 1 I'm downloading same file via http (and file is stored on server with atheros card, so everything is purely local and doesn't depends on any external resources)
Created attachment 66592 [details] enable HT without checking please try this patch, I enable the HT without checking the traffic load Wey
I'm getting: [136613.600081] iwlagn 0000:02:00.0: iwlagn_tx_agg_start on ra = 00:21:91:f3:c8:a1 tid = 0 and download speed is something around 6 mb/sec. So this is better and looks exactly like in Windows. I don't know, is it possible to get better results in these conditions.
Are you saying with the patch you are getting higher speed? Thanks Wey
Yes. Exactly. it's something around 3 mb/sec without patch and 5-7 mb/sec with.
A patch referencing this bug report has been merged in Linux v3.2-rc1: commit dd5b6d0a2059027366028630746d951b1e1e24b3 Author: Wey-Yi Guy <wey-yi.w.guy@intel.com> Date: Thu Aug 25 23:10:55 2011 -0700 iwlagn: enable 11n aggregation without checking traffic load
Closing on the basis of comment 7...