em forwarding performance (was Proposed 6.2 em RELEASE patch
mike at sentex.net
Tue Nov 28 11:00:05 PST 2006
At 03:06 AM 11/28/2006, Massimo Lusetti wrote:
>On Mon, 27 Nov 2006 16:36:34 -0500
>Mike Tancsa <mike at 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.
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