Automatic TCP send and receive socket buffer sizing

[王晓东]

I have applied the patch of automatic send buffer sizing.
My log file is:
Dec 13 21:54:25 FreeBSD kernel: tcp_output: 202.119.117.246 inc sockbuf, old
33304, new 41496, sb_cc 30328, snd_wnd 65160, sendwnd 20308
Dec 13 21:54:25 FreeBSD kernel: tcp_output: 202.119.117.246 inc sockbuf, old
41496, new 49688, sb_cc 39680, snd_wnd 66608, sendwnd 20272
Dec 13 21:54:25 FreeBSD kernel: tcp_output: 202.119.117.246 inc sockbuf, old
49688, new 57880, sb_cc 46840, snd_wnd 65160, sendwnd 24616
Dec 13 21:54:25 FreeBSD kernel: tcp_output: 202.119.117.246 inc sockbuf, old
57880, new 66072, sb_cc 54536, snd_wnd 65160, sendwnd 30408
Dec 13 21:54:25 FreeBSD kernel: tcp_output: 202.119.117.246 inc sockbuf, old
66072, new 74264, sb_cc 63848, snd_wnd 65160, sendwnd 33304
Dec 13 21:54:25 FreeBSD kernel: tcp_output: 202.119.117.246 inc sockbuf, old
74264, new 82456, sb_cc 71544, snd_wnd 65160, sendwnd 39096
Dec 13 21:54:25 FreeBSD kernel: tcp_output: 202.119.117.246 inc sockbuf, old
82456, new 90648, sb_cc 73944, snd_wnd 66608, sendwnd 43440
Dec 13 21:55:58 FreeBSD kernel: tcp_output: 202.119.117.245 inc sockbuf, old
33304, new 41496, sb_cc 29818, snd_wnd 64128, sendwnd 15461
Dec 13 21:58:13 FreeBSD kernel: tcp_output: 202.119.117.45 inc sockbuf, old
33580, new 41772, sb_cc 31672, snd_wnd 65535, sendwnd 17520
Dec 13 21:58:13 FreeBSD kernel: tcp_output: 202.119.117.45 inc sockbuf, old
41772, new 49964, sb_cc 37592, snd_wnd 65535, sendwnd 21900
Dec 13 21:58:13 FreeBSD kernel: tcp_output: 202.119.117.45 inc sockbuf, old
49964, new 58156, sb_cc 44324, snd_wnd 65535, sendwnd 23360
Dec 13 21:58:13 FreeBSD kernel: tcp_output: 202.119.117.45 inc sockbuf, old
58156, new 66348, sb_cc 53408, snd_wnd 65535, sendwnd 27740
Dec 13 21:58:13 FreeBSD kernel: tcp_output: 202.119.117.45 inc sockbuf, old
66348, new 74540, sb_cc 62492, snd_wnd 65535, sendwnd 32120
Dec 13 21:58:13 FreeBSD kernel: tcp_output: 202.119.117.45 inc sockbuf, old
74540, new 82732, sb_cc 70116, snd_wnd 65535, sendwnd 37960
Dec 13 21:59:29 FreeBSD kernel: tcp_output: 202.119.117.245 inc sockbuf, old
41496, new 49688, sb_cc 36934, snd_wnd 64128, sendwnd 19101
Dec 13 21:59:29 FreeBSD kernel: tcp_output: 202.119.117.245 inc sockbuf, old
49688, new 57880, sb_cc 44222, snd_wnd 69888, sendwnd 22976

And 117.45 is XP, 117.245 is Debian, 117.246 is FreeBSD-6-Stable.

How to analyze the performance? I need a help.

Wangxd