Hi Eric,
Thanks for the info. I tried changing the values of tcp_wmem and tcp_rmem to
highr values but still the advertised window from the receiver starts from
5792 bytes and the throughput is limited. I am not sure if there is any
method to increase the receiver adverstised window to higher values.. Do you
know any information on this.
bi
mahesh
>From: Eric Weigle <ehw@lanl.gov>
>To: Akarapu Mahesh <mahesh_a6@hotmail.com>
>CC: linux-kernel@vger.kernel.org
>Subject: Re: doubt on auto tuning in 2.4 kernels
>Date: Wed, 13 Feb 2002 09:07:16 -0700
>
> > Hi,
> > Does anybody know if auto tuning can be turned off in 2.4 kernels. If
>yes
> > can some body tell me how to do so. Seems like Auto tuning of socket
>buffers
> > is overriding my large buffer settings.
> > Any help in this regard would be appreciated.
>
>It can't be turned off. It is a way of managing non-swappable kernel memory
>and if you are in memory pressure, then you may not get 'ideal' buffers.
>
>There are a couple things you *can* do, though; take a look at
>Documentation/networking/ip-sysctl.txt in the kernel source. In particular,
>tcp_wmem and tcp_rmem. It's not a good idea to set min and max the
>same, but if you make your default the 'ideal' and the min/max slightly
>less/more you should get good results.
>
>Also look at your settings in /proc/sys/net/core/[rw]mem_[max|default].
>
>Here are a couple of tuning links I've found useful:
>
> http://www.psc.edu/networking/perf_tune.html#Linux
> http://www-didc.lbl.gov/tcp-wan.html
>
>-Eric
>
>--
>--------------------------------------------
> Eric H. Weigle CCS-1, RADIANT team
> ehw@lanl.gov Los Alamos National Lab
> (505) 665-4937 http://home.lanl.gov/ehw/
>--------------------------------------------
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