Date: Tue, 28 Nov 2006 13:55:48 -0500 From: Mike Tancsa <mike@sentex.net> To: Massimo Lusetti <massimo@cedoc.mo.it> Cc: freebsd-performance@freebsd.org Subject: Re: em forwarding performance (was Proposed 6.2 em RELEASE patch Message-ID: <200611281856.kASIueZX035063@lava.sentex.ca> In-Reply-To: <20061128090648.d58eb6ae.massimo@cedoc.mo.it> References: <4557CECD.2000609@samsco.org> <200611130158.kAD1wdKE040908@lava.sentex.ca> <4557EF13.9060305@samsco.org> <200611130454.kAD4sZwe041556@lava.sentex.ca> <4557FF7A.8020704@samsco.org> <200611132054.kADKsFvK045726@lava.sentex.ca> <4558E3DC.6080800@samsco.org> <200611200454.kAK4sdat083568@lava.sentex.ca> <7.1.0.9.0.20061120160757.14d4a728@sentex.net> <200611220247.kAM2l9JP095066@lava.sentex.ca> <20061122130947.GM20405@obiwan.tataz.chchile.org> <200611231652.kANGqJsr005016@lava.sentex.ca> <1164356894.4306.1.camel@massimo.datacode.it> <200611272136.kARLaMeG029740@lava.sentex.ca> <20061128090648.d58eb6ae.massimo@cedoc.mo.it>
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At 03:06 AM 11/28/2006, Massimo Lusetti wrote:
>On Mon, 27 Nov 2006 16:36:34 -0500
>Mike Tancsa <mike@sentex.net> wrote:
>
> > OK, I added OpenBSD to the mix as well. Results are pretty crappy
> > with the base default install. With one stream, the box essentially
> > live locks. This was just with the stock kernels from the CD. The
> > PCIe bge nics dont work, so I cant test those. I had a look at their
> > errata page and there seems to be some updates to those 2 nics so if
> > there is interest I can try compiling in those fixes and re-testing
>
>FWIW I would definitively like to see it. But thanks for going so far..
I will give it another try tomorrow as I dont have much time today.
However, I did one test with a new CPU. I changed the cpu from an AMD
3800 to an AMD4600. So going from a CPU with a clock speed of 2Ghz to
2.4Gz. The difference is sort of what one would expect. In the ipfw
tests, (with a sample of 40 seconds) opposite path forwarding with 10
ipfw rules went from 208 Kpps to 235 Kpps or about a 10% increase as
opposed to the ~ 15% increase in clock speed. Perhaps bus is more of
a limiting factor that CPU but then again some the difference could
be explained with normal variance.
---Mike
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