Messages in this thread | | | Date | Wed, 13 Feb 2002 09:07:16 -0700 | From | Eric Weigle <> | Subject | Re: doubt on auto tuning in 2.4 kernels |
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> 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/ -------------------------------------------- - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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