#of		byte	time		rate
send,recv		millisec	Mbyte/s
--------------------------------------------------
20		256      5.5459332      0.04615995
100		256      5.744648      0.04456322 
200		256      5.8458333      0.043791875
300		256      5.7987423      0.044147503
400		256      6.0153313      0.04255792
500		256      6.0335274      0.042429574
600		256      6.060333      0.042241905
800		256      6.113636      0.04187361
1000		256      6.065526      0.04220574
1200		256      6.0550823      0.042278536
2000		256      6.3522778      0.040300503 
3000		256      6.189008      0.041363657
6000		256      6.0911465      0.042028215
8000		256      6.163932      0.04153193
16000		256      6.3199096      0.040506907
32000