[FS#508] ath9k / poor performance + drops with r3426 (after airtime-fairness fixup)

LEDE Bugs lede-bugs at lists.infradead.org
Mon Feb 13 07:36:35 PST 2017


The following task has a new comment added:

FS#508 - ath9k / poor performance + drops with r3426 (after airtime-fairness fixup)
User who did this - Bastian Bittorf (bittorf)

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switching off airtime fairness also "fixes" it:


root at F36-stube:~ :) for F in /sys/kernel/debug/ieee80211/phy*/*/airtime_flags; do echo 0 >$F; done

root at F36-stube:~ :) cat /sys/kernel/debug/ieee80211/phy1/netdev:wlan1-1/stations/00:1e:65:94:22:52/rc_stats

              best   ____________rate__________    ________statistics________    _____last____    ______sum-of________
mode guard #  rate  [name   idx airtime  max_tp]  [avg(tp) avg(prob) sd(prob)]  [retry|suc|att]  [#success | #attempts]
CCK    LP  1          1.0M  120   10548     0.0       0.0      95.6     20.2       0     0 0           674   1354     
CCK    LP  1          2.0M  121    5476     0.0       0.0     100.0      0.0       0     0 0             1   1        
CCK    LP  1          5.5M  122    2411     2.4       2.4      99.9      0.0       2     0 0         69458   95654    
CCK    LP  1         11.0M  123    1535     4.8       4.8      95.3     19.7       3     0 0         29886   33765    
HT20  LGI  1         MCS0     0    1477     4.8       4.8      96.0     13.6       3     0 0        101577   222729   
HT20  LGI  1         MCS1     1     739     9.7       9.7      96.2     14.4       4     0 0         24951   42722    
HT20  LGI  1         MCS2     2     493    14.6      14.6      95.0     18.7       5     0 0           967   2800     
HT20  LGI  1         MCS3     3     369    17.0      17.0      95.2     17.6       5     0 0           432   2777     
HT20  LGI  1   B     MCS4     4     246    24.4      24.4      99.8      0.0       5     0 0           879   1606     
HT20  LGI  1         MCS5     5     185    29.2      12.2      37.5     48.3       5     0 0            35   750      
HT20  LGI  1     D   MCS6     6     164    31.7      24.4      69.4     44.9       5     0 0           518   1272     
HT20  LGI  1         MCS7     7     148    34.1      21.9      56.2     47.0       5     0 0          1746   2767     
HT20  LGI  2         MCS8    10     739     9.7       9.7      95.8     14.3       4     0 0         39271   68323    
HT20  LGI  2         MCS9    11     369    17.0      17.0      96.1     16.6       5     0 0         14378   38676    
HT20  LGI  2         MCS10   12     246    24.4      17.0      62.9     48.1       5     0 0           693   1868     
HT20  LGI  2         MCS11   13     185    29.2      21.9      64.4     47.7       5     0 0          6266   9675     
HT20  LGI  2         MCS12   14     123    36.6       0.0       0.0      0.0       6     0 0           299   1347     
HT20  LGI  2         MCS13   15      93    43.9       7.3      18.7     38.9       6     0 0           900   2922     
HT20  LGI  2         MCS14   16      82    46.3       0.0       0.0      0.0       0     0 0             4   512      
HT20  LGI  2         MCS15   17      74    48.8       0.0       0.0      1.5       5     0 0            10   629      
HT20  SGI  1         MCS0    30    1329     4.8       4.8      96.0     19.2       3     0 0           725   2055     
HT20  SGI  1         MCS1    31     665     9.7       9.7      96.2     16.6       4     0 0          1576   5820     
HT20  SGI  1         MCS2    32     443    14.6      14.6      95.2     19.5       5     0 0           495   2786     
HT20  SGI  1         MCS3    33     332    19.5      19.5      96.3     10.1       5     0 0          1635   4225     
HT20  SGI  1    C    MCS4    34     222    26.8      24.4      82.6     21.8       5     0 0          1492   2277     
HT20  SGI  1         MCS5    35     166    31.7      12.2      36.4     48.0       5     0 0            20   525      
HT20  SGI  1         MCS6    36     148    34.1      21.9      60.4     38.4       5     0 0          2038   3011     
HT20  SGI  1  A   P  MCS7    37     133    36.6      36.6      91.8     15.1       6     2 2          7464   9550     
HT20  SGI  2         MCS8    40     665     9.7       9.7      95.6     16.2       4     0 0          1912   5334     
HT20  SGI  2         MCS9    41     332    19.5      19.5      95.5     13.5       5     0 0          2879   10700    
HT20  SGI  2         MCS10   42     222    26.8      17.0      57.8     49.2       5     0 0          2662   4654     
HT20  SGI  2         MCS11   43     166    31.7      19.5      53.8     48.6       5     0 0          8438   11419    
HT20  SGI  2         MCS12   44     111    39.0       0.0       0.0      0.0       6     0 0           406   1625     
HT20  SGI  2         MCS13   45      83    46.3       0.0       0.0      0.0       6     0 0           446   1977     
HT20  SGI  2         MCS14   46      74    48.8       0.0       0.0      0.0       6     0 0            12   596      
HT20  SGI  2         MCS15   47      67    51.2       0.0       0.0      0.0       6     0 0            64   885      

Total packet count::    ideal 312016      lookaround 16242
Average # of aggregated frames per A-MPDU: 1.0


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More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=508#comment1780



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