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Re: What exactly is net.inet.tcp.sockthreshold?
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Re: What exactly is net.inet.tcp.sockthreshold?

  • Subject: Re: What exactly is net.inet.tcp.sockthreshold?
  • From: Vincent Lubet <email@hidden>
  • Date: Fri, 30 Sep 2005 14:35:00 -0700
Chris,

The sysctl variables net.inet.tcp.recvspace and net.inet.tcp.sendspace are the default values for the TCP socket buffers that are used to determine the window size. A program is free to override those default values by using the socket options SO_RCVBUF and SO_SNDBUF -- that's what the AFP does.

Vincent

On Sep 30, 2005, at 1:45 PM, Chris McFarling wrote:

**This is an addition to my previous post**

I tried the same test as mentioned previously but mounted the volume on the
client via SMB. This time the TCP window size that I had manually specified
(18824) was used. So it appears that AFP has it's own way of dealing with
window sizes. How can that be affected?


SMB PACKET TRACE

13:36:20.014410 IP 192.168.10.121.50119 > 192.168.10.13.139: .
13579:15027(1448) ack 537 win 65535 <nop,nop,timestamp 3574083461
3550899915> NBT Packet
13:36:20.014456 IP 192.168.10.13.139 > 192.168.10.121.50119: . ack 15027 win
18824 <nop,nop,timestamp 3550899915 3574083461>
13:36:20.014905 IP 192.168.10.121.50119 > 192.168.10.13.139: .
15027:16475(1448) ack 537 win 65535 <nop,nop,timestamp 3574083461
3550899915> NBT Packet
13:36:20.014907 IP 192.168.10.121.50119 > 192.168.10.13.139: .
16475:17923(1448) ack 537 win 65535 <nop,nop,timestamp 3574083461
3550899915> NBT Packet
13:36:20.014910 IP 192.168.10.121.50119 > 192.168.10.13.139: .
17923:19371(1448) ack 537 win 65535 <nop,nop,timestamp 3574083461
3550899915> NBT Packet
13:36:20.014912 IP 192.168.10.121.50119 > 192.168.10.13.139: .
19371:20819(1448) ack 537 win 65535 <nop,nop,timestamp 3574083461
3550899915> NBT Packet
13:36:20.014915 IP 192.168.10.121.50119 > 192.168.10.13.139: .
20819:22267(1448) ack 537 win 65535 <nop,nop,timestamp 3574083461
3550899915> NBT Packet
13:36:20.014917 IP 192.168.10.121.50119 > 192.168.10.13.139: .
22267:23715(1448) ack 537 win 65535 <nop,nop,timestamp 3574083461
3550899915> NBT Packet
13:36:20.014920 IP 192.168.10.121.50119 > 192.168.10.13.139: .
23715:25163(1448) ack 537 win 65535 <nop,nop,timestamp 3574083461
3550899915> NBT Packet
13:36:20.014923 IP 192.168.10.121.50119 > 192.168.10.13.139: .
25163:26611(1448) ack 537 win 65535 <nop,nop,timestamp 3574083461
3550899915> NBT Packet
13:36:20.014925 IP 192.168.10.121.50119 > 192.168.10.13.139: .
26611:28059(1448) ack 537 win 65535 <nop,nop,timestamp 3574083461
3550899915> NBT Packet
13:36:20.014927 IP 192.168.10.121.50119 > 192.168.10.13.139: .
28059:29507(1448) ack 537 win 65535 <nop,nop,timestamp 3574083461
3550899915> NBT Packet
13:36:20.014930 IP 192.168.10.121.50119 > 192.168.10.13.139: .
29507:30955(1448) ack 537 win 65535 <nop,nop,timestamp 3574083461
3550899915> NBT Packet
13:36:20.014951 IP 192.168.10.13.139 > 192.168.10.121.50119: . ack 30955 win
18824 <nop,nop,timestamp 3550899915 3574083461>
13:36:20.015119 IP 192.168.10.121.50119 > 192.168.10.13.139: .
30955:32403(1448) ack 537 win 65535 <nop,nop,timestamp 3574083461
3550899915> NBT Packet
13:36:20.015121 IP 192.168.10.121.50119 > 192.168.10.13.139: .
32403:33851(1448) ack 537 win 65535 <nop,nop,timestamp 3574083461
3550899915> NBT Packet
13:36:20.015124 IP 192.168.10.121.50119 > 192.168.10.13.139: .
33851:35299(1448) ack 537 win 65535 <nop,nop,timestamp 3574083461
3550899915> NBT Packet
13:36:20.015177 IP 192.168.10.13.139 > 192.168.10.121.50119: . ack 35299 win
18824 <nop,nop,timestamp 3550899915 3574083461>
13:36:20.015345 IP 192.168.10.121.50119 > 192.168.10.13.139: .
35299:36747(1448) ack 537 win 65535 <nop,nop,timestamp 3574083461
3550899915> NBT Packet
13:36:20.015347 IP 192.168.10.121.50119 > 192.168.10.13.139: .
36747:38195(1448) ack 537 win 65535 <nop,nop,timestamp 3574083461
3550899915> NBT Packet
13:36:20.015349 IP 192.168.10.121.50119 > 192.168.10.13.139: .
38195:39643(1448) ack 537 win 65535 <nop,nop,timestamp 3574083461
3550899915> NBT Packet
13:36:20.015351 IP 192.168.10.121.50119 > 192.168.10.13.139: .
39643:41091(1448) ack 537 win 65535 <nop,nop,timestamp 3574083461
3550899915> NBT Packet
13:36:20.015353 IP 192.168.10.121.50119 > 192.168.10.13.139: .
41091:42539(1448) ack 537 win 65535 <nop,nop,timestamp 3574083461
3550899915> NBT Packet
13:36:20.015355 IP 192.168.10.121.50119 > 192.168.10.13.139: .
42539:43987(1448) ack 537 win 65535 <nop,nop,timestamp 3574083461
3550899915> NBT Packet
13:36:20.015357 IP 192.168.10.121.50119 > 192.168.10.13.139: .
43987:45435(1448) ack 537 win 65535 <nop,nop,timestamp 3574083461
3550899915> NBT Packet
13:36:20.015359 IP 192.168.10.121.50119 > 192.168.10.13.139: .
45435:46883(1448) ack 537 win 65535 <nop,nop,timestamp 3574083461
3550899915> NBT Packet
13:36:20.015362 IP 192.168.10.121.50119 > 192.168.10.13.139: .
46883:48331(1448) ack 537 win 65535 <nop,nop,timestamp 3574083461
3550899915> NBT Packet
13:36:20.015364 IP 192.168.10.121.50119 > 192.168.10.13.139: .
48331:49779(1448) ack 537 win 65535 <nop,nop,timestamp 3574083461
3550899915> NBT Packet
13:36:20.015366 IP 192.168.10.121.50119 > 192.168.10.13.139: .
49779:51227(1448) ack 537 win 65535 <nop,nop,timestamp 3574083461
3550899915> NBT Packet
13:36:20.015368 IP 192.168.10.121.50119 > 192.168.10.13.139: .
51227:52675(1448) ack 537 win 65535 <nop,nop,timestamp 3574083461
3550899915> NBT Packet
13:36:20.015389 IP 192.168.10.13.139 > 192.168.10.121.50119: . ack 52675 win
18824 <nop,nop,timestamp 3550899915 3574083461>
13:36:20.015557 IP 192.168.10.121.50119 > 192.168.10.13.139: .
52675:54123(1448) ack 537 win 65535 <nop,nop,timestamp 3574083461
3550899915> NBT Packet

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    • Re: What exactly is net.inet.tcp.sockthreshold?

      • From: "Chris McFarling" <email@hidden>
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References: 


 >What exactly is net.inet.tcp.sockthreshold? (From: "Chris McFarling" <email@hidden>)


 >Re: What exactly is net.inet.tcp.sockthreshold? (From: Vincent Lubet <email@hidden>)


 >Re: What exactly is net.inet.tcp.sockthreshold? (From: "Chris McFarling" <email@hidden>)


 >Re: What exactly is net.inet.tcp.sockthreshold? (From: "Chris McFarling" <email@hidden>)






    

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