TCP Stall

Richard B. Johnson (root@analogic.com)
Tue, 15 Apr 1997 19:55:23 -0400 (EDT)

The current kernel seems to have fixed the TCP Stall problem.
This is the result of using my test program to log TCP Stalls
during a 1000 packet, 1460 byte test using the chargen source
on node chaos, through the routing and networking depicted in
the accompanying schematic, to node merrimac, also shown.

Stall at pk:5 tot:5914 time:861146966.645766 1164 bps
Stall at pk:77 tot:111034 time:861146999.755744 2907 bps
Stall at pk:133 tot:192794 time:861147032.685770 2711 bps
Stall at pk:200 tot:290614 time:861147065.685764 2791 bps
Stall at pk:263 tot:382594 time:861147098.575801 2792 bps
Stall at pk:326 tot:474574 time:861147131.705765 2789 bps
Stall at pk:394 tot:573854 time:861147164.745754 2824 bps
Stall at pk:457 tot:665834 time:861147197.595764 2821 bps
Stall at pk:526 tot:766574 time:861147230.905762 2846 bps
Stall at pk:590 tot:860014 time:861147263.965754 2844 bps
Stall at pk:658 tot:959294 time:861147296.875762 2861 bps
Stall at pk:722 tot:1052734 time:861147329.835765 2859 bps
Stall at pk:789 tot:1150554 time:861147362.795765 2868 bps
Stall at pk:857 tot:1249834 time:861147395.815771 2878 bps
Stall at pk:925 tot:1349114 time:861147429.15759 2886 bps
Stall at pk:988 tot:1441094 time:861147461.815764 2881 bps

This is the test setup.

----------------
uu.net ===> T1 ========>| Cisco router | analogic.com (204.178.40->47.NNN)
------||--------
||
=======||================||===VV===============||========= 10 mb/s Ethernet
|| || ||
|| -------VV-------- ----------VV----------
|| | chaos (Linux) | | boneserver (Linux) |
------VV------- | ** chargen ** | | Domain name-server |
| quark (Linux) | |_______________| |____________________|
|_______________| ______________________
| | skunkworks (Linux) |
|--> 28.8 dialup ppp --->| Domain name-server |
| 204.178.47.0 router |
|_____________________|
||
========================================VV=============== 10 mb/s Ethernet
|| ||
_____VV_____________ _____VV_____________
| | | ** tcp tester ** |
| groveland (Linux) | | merrimac (Linux) |
|___________________| |__________________|

This looks like good work to me!

Cheers,
Dick Johnson
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Richard B. Johnson
Project Engineer
Analogic Corporation
Voice : (508) 977-3000 ext. 3754
Fax : (508) 532-6097
Modem : (508) 977-6870
Ftp : ftp@boneserver.analogic.com
Email : rjohnson@analogic.com, johnson@analogic.com
Penguin : Linux version 2.1.34 on an i586 machine (66.15 BogoMips).
Warning : I read unsolicited mail for $350.00 per hour. Supply billing address.
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