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List Archive: gentoo-performance
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To: gentoo-performance@g.o
From: "Miguel Sousa Filipe" <miguel.filipe@...>
Subject: Re: TCP perfomance
Date: Sat, 7 Jun 2008 23:28:57 +0100
On Fri, Jun 6, 2008 at 6:26 PM, Kevin Faulkner <kevlar.kernel@...> wrote:
> Miguel Sousa Filipe wrote:
>>
>> There is no such thing has a TCP timestamp:
>> http://freebie.fatpipe.org/~mjb/Drawings/TCP_Header.png
>>
>> so, that doesn't make any sense...
>
> Your right and I'm wrong.
> Its not in the header, its thrown on at the end....

...at the end of the tcp header, it's a tcp option. (I didn't
understood that the first time I read this email).
It might be good to disable all tcp optional headers..
Also there might be important to look at issues such has:
- mtu size
- tcp window
- set the don't fragment flag (this can offload the routers and
optimize the mtu for the whole connection path)
- use the BIC algorithm (from what I've read, that's my default choice
nowadays... but for some specific workload there might be better
algorithms)



> try doing
> cat /proc/sys/net/ipv4/tcp_timestamps
>
> http://www.networksorcery.com/enp/protocol/tcp/option008.htm
> http://www.securiteam.com/securitynews/5NP0C153PI.html

kind regards!

-- 
Miguel Sousa Filipe
-- 
gentoo-performance@g.o mailing list


Replies:
Re: TCP perfomance
-- Kevin Faulkner
References:
TCP perfomance
-- Kevin Faulkner
Re: TCP perfomance
-- Miguel Sousa Filipe
Re: TCP perfomance
-- Kevin Faulkner
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Updated Jun 17, 2009

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