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GMANE provides an alternative service for most mailing lists. c.f. bug 424647
There are quite a few things that make TCP performance degrade. Is there a specific reason why you thought about TCP timestamps?<br>A good way to know is to launch a TCP connection and get it to a stage where you can clearly see its performance suffer. Then first take a look at the CPU usage... if its 100% only then you should conclude that the problem is with the CPU usage aspect of it.<br>
In my experience, there can be many other things that may go wrong. There are quite a few 'TCP tuning' faqs around the Internet. You might want to go through a few to see some commonly used solutions.<br><br>OTOH, TCP timestamps are an important part of TCP... may be not for a LAN like system but definitely for a complicated network like the Internet, where timestamps help TCP to easily infer round trip times with much more precision than otherwise.<br>
<br>_r<br><br><div class="gmail_quote">On Fri, Jun 6, 2008 at 1:26 PM, Kevin Faulkner <<a href="mailto:kevlar.kernel@...">kevlar.kernel@...</a>> wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<div class="Ih2E3d">Miguel Sousa Filipe wrote:<br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
There is no such thing has a TCP timestamp:<br>
<a href="http://freebie.fatpipe.org/%7Emjb/Drawings/TCP_Header.png" target="_blank">http://freebie.fatpipe.org/~mjb/Drawings/TCP_Header.png</a><br>
<br>
so, that doesn't make any sense...<br>
</blockquote></div>
Your right and I'm wrong.<br>
Its not in the header, its thrown on at the end....<br>
try doing<br>
cat /proc/sys/net/ipv4/tcp_timestamps<br>
<br>
<a href="http://www.networksorcery.com/enp/protocol/tcp/option008.htm" target="_blank">http://www.networksorcery.com/enp/protocol/tcp/option008.htm</a><br>
<a href="http://www.securiteam.com/securitynews/5NP0C153PI.html" target="_blank">http://www.securiteam.com/securitynews/5NP0C153PI.html</a><br><font color="#888888">
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<a href="mailto:gentoo-performance@g.o" target="_blank">gentoo-performance@g.o</a> mailing list<br>
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</div></div></blockquote></div><br>
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