[Battlemesh] 802.11ac improvements [was: What hardware still works?]
Bastian Bittorf
bittorf at bluebottle.com
Thu Feb 25 15:17:52 UTC 2016
* Juliusz Chroboczek <jch at pps.univ-paris-diderot.fr> [25.02.2016 16:13]:
> Interesting. Perhaps the .11n driver doesn't implement the short guard
> interval? SGI + 256-QAM as compared to SGI + 64-QAM would be a 48%
> increase, which would fit your figures.
it does use SGI, you can see it in the minstrel-table (but only if used). e.g.:
(see second column: SGI/LGI)
root at box:~ cat /sys/kernel/debug/ieee80211/phy1/netdev:wlan1/stations/f8:1a:67:33:1b:be/rc_stats
best ____________rate__________ ________statistics________ ________last_______ ______sum-of________
mode guard # rate [name idx airtime max_tp] [avg(tp) avg(prob) sd(prob)] [prob.|retry|suc|att] [#success | #attempts]
HT20 LGI 1 MCS0 0 1477 5.6 5.6 100.0 0.0 100.0 3 0 0 1 1
HT20 LGI 1 MCS1 1 739 10.5 9.6 82.2 1.7 100.0 0 0 0 6 7
HT20 LGI 1 MCS2 2 493 14.9 14.9 100.0 0.0 100.0 0 0 0 1 1
HT20 LGI 1 MCS3 3 369 18.7 18.7 100.0 0.0 100.0 0 0 0 1 1
HT20 LGI 1 MCS4 4 246 25.3 23.1 82.2 1.7 100.0 0 0 0 6 7
HT20 LGI 1 MCS5 5 185 30.6 27.7 81.4 1.0 100.0 5 0 0 6 18
HT20 LGI 1 MCS6 6 164 32.9 13.4 36.9 1.5 0.0 0 0 0 4 13
HT20 LGI 1 MCS7 7 148 35.0 0.0 0.0 0.0 0.0 0 0 0 0 13
HT20 LGI 2 MCS8 10 739 10.5 10.5 100.0 0.0 100.0 0 0 0 1 1
HT20 LGI 2 MCS9 11 369 18.7 18.7 100.0 0.0 100.0 0 0 0 1 1
HT20 LGI 2 MCS10 12 246 25.3 25.3 100.0 0.0 100.0 0 0 0 1 1
HT20 LGI 2 P MCS11 13 185 30.6 30.6 96.0 1.4 100.0 5 0 0 42 53
HT20 LGI 2 MCS12 14 123 38.9 27.6 64.1 0.8 14.2 6 0 0 7 19
HT20 LGI 2 MCS13 15 93 44.8 0.0 0.0 0.0 0.0 0 0 0 0 12
HT20 LGI 2 MCS14 16 82 47.3 0.0 0.0 0.0 0.0 0 0 0 0 13
HT20 LGI 2 MCS15 17 74 49.4 0.0 0.0 0.0 0.0 0 0 0 0 12
HT20 LGI 3 MCS16 20 493 14.9 14.9 100.0 0.0 100.0 0 0 0 1 1
HT20 LGI 3 MCS17 21 246 25.3 25.3 100.0 0.0 100.0 0 0 0 1 1
HT20 LGI 3 B MCS18 22 164 32.9 32.9 94.6 1.2 100.0 5 0 0 3805 4328
HT20 LGI 3 D MCS19 23 123 38.9 30.9 71.9 1.9 50.0 6 0 0 55 69
HT20 LGI 3 MCS20 24 82 47.3 0.0 0.0 0.0 0.0 0 0 0 0 12
HT20 LGI 3 MCS21 25 62 52.9 0.0 0.0 0.0 0.0 0 0 0 0 12
HT20 LGI 3 MCS22 26 55 55.2 0.0 0.0 0.0 0.0 0 0 0 0 13
HT20 LGI 3 MCS23 27 49 57.2 0.0 0.0 0.0 0.0 0 0 0 0 12
HT20 SGI 1 MCS0 30 1329 6.2 6.2 100.0 0.0 100.0 0 0 0 1 1
HT20 SGI 1 MCS1 31 665 11.5 7.3 57.5 1.5 100.0 0 0 0 4 6
HT20 SGI 1 MCS2 32 443 16.1 16.1 100.0 0.0 100.0 0 0 0 1 1
HT20 SGI 1 MCS3 33 332 20.2 20.2 100.0 0.0 100.0 0 0 0 1 1
HT20 SGI 1 MCS4 34 222 27.1 27.1 100.0 0.0 100.0 5 0 0 1 1
HT20 SGI 1 MCS5 35 166 32.8 25.9 71.3 1.7 0.0 5 0 0 32 62
HT20 SGI 1 MCS6 36 148 35.0 25.4 65.3 0.9 100.0 0 0 0 6 12
HT20 SGI 1 MCS7 37 133 37.2 0.0 0.0 0.0 0.0 0 0 0 0 12
HT20 SGI 2 MCS8 40 665 11.5 11.5 100.0 0.0 100.0 0 0 0 1 1
HT20 SGI 2 MCS9 41 332 20.2 20.2 100.0 0.0 100.0 0 0 0 1 1
HT20 SGI 2 MCS10 42 222 27.1 24.8 82.2 1.7 100.0 0 0 0 6 7
HT20 SGI 2 MCS11 43 166 32.8 28.8 79.2 1.6 33.3 5 0 0 218 278
HT20 SGI 2 MCS12 44 111 41.0 30.5 67.0 0.6 33.3 6 0 0 152 173
HT20 SGI 2 MCS13 45 83 46.9 0.0 0.0 0.0 0.0 0 0 0 0 12
HT20 SGI 2 MCS14 46 74 49.2 0.0 0.0 0.0 0.0 0 0 0 0 13
HT20 SGI 2 MCS15 47 67 51.4 0.0 0.0 0.0 0.0 0 0 0 0 12
HT20 SGI 3 MCS16 50 443 16.1 16.1 100.0 0.0 100.0 0 0 0 1 1
HT20 SGI 3 MCS17 51 222 27.1 27.1 100.0 0.0 100.0 0 0 0 1 1
HT20 SGI 3 A MCS18 52 148 35.0 35.0 99.9 0.0 100.0 5 1 1 1576 1613
HT20 SGI 3 C MCS19 53 111 41.0 31.1 68.4 1.2 0.0 6 0 0 1377 1492
HT20 SGI 3 MCS20 54 74 49.2 0.0 0.0 0.0 0.0 0 0 0 0 12
HT20 SGI 3 MCS21 55 56 54.9 0.0 0.0 0.0 0.0 0 0 0 0 12
HT20 SGI 3 MCS22 56 49 57.0 0.0 0.0 0.0 0.0 0 0 0 0 13
HT20 SGI 3 MCS23 57 44 59.0 0.0 0.0 0.0 0.0 0 0 0 0 12
Total packet count:: ideal 6973 lookaround 347
Average # of aggregated frames per A-MPDU: 1.0
bye, bastian
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