Pine64 TX/RX delay test

TX/RX   TX              RX
delay:  Mb/s    retry   Mb/s    retry
 0/ 0:  876     233     941     0
 0/ 1:  900     150     941     0
 0/ 2:  388     1346    148     0
 0/ 3:  312     1701    967     0
 0/ 4:  898     108     55.9    0
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 1/ 0:  915     0       941     0
 1/ 1:  916     0       941     0
 1/ 2:  917     0       154     0
 1/ 3:  915     0       647     0
 1/ 4:  917     0       64.7    0
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 2/ 0:  914     0       941     0
 2/ 1:  916     0       940     0
 2/ 2:  916     0       321     0
 2/ 3:  917     0       2.04    0
 2/ 4:  917     0       52.4    0
 2/ 5:  894     150     86.9    0
 2/ 6:  45.5    19      52.4    0
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 3/ 0:  878     231     938     0
 3/ 1:  867     274     938     0
 3/ 2:  863     276     937     0
 3/ 3:  881     272     608     0
 3/ 4:  864     273     59.1    0
 3/ 5:  882     279     112     0
 3/ 6:          52.4    0
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 4/ 0:  906     37      939     0
 4/ 1:  907     41      938     0
 4/ 2:  916     49      931     0
 4/ 3:  916     38      792     0
 4/ 4:  902     32      5.89    0
 4/ 5:  913     37      155     0