Danial Thom <[EMAIL PROTECTED]> wrote: > > I just started fiddling with 2.6.12, and there > seems to be a big drop-off in performance from > 2.4.x in terms of networking on a uniprocessor > system. Just bridging packets through the > machine, 2.6.12 starts dropping packets at > ~100Kpps, whereas 2.4.x doesn't start dropping > until over 350Kpps on the same hardware (2.0Ghz > Opteron with e1000 driver). This is pitiful > prformance for this hardware. I've > increased the rx ring in the e1000 driver to 512 > with little change (interrupt moderation is set > to 8000 Ints/second). Has "tuning" for MP > destroyed UP performance altogether, or is there > some tuning parameter that could make a 4-fold > difference? All debugging is off and there are > no messages on the console or in the error logs. > The kernel is the standard kernel.org dowload > config with SMP turned off and the intel ethernet > card drivers as modules without any other > changes, which is exactly the config for my 2.4 > kernels. >
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