4.7 vs 5.2.1 SMP/UP bridging performance
Scott Long
scottl at freebsd.org
Tue May 4 13:15:16 PDT 2004
Kris Kennaway wrote:
> On Tue, May 04, 2004 at 03:55:32PM -0400, Gerrit Nagelhout wrote:
>
>
>>I would like to move to CURRENT for new hardware support, and the
>>ability to properly use multi-threading in user-space, but can't do
>>this until the performance bottlenecks are solved. I realize that
>>5.x is still a work in progress and hasn't been tuned as well as 4.7
>>yet, but are there any plans for optimizations in this area? Does
>>anyone have any suggestions on what else I can try?
>
>
> Try rwatson's netperf patches:
>
> http://www.watson.org/~robert/freebsd/netperf/
>
> There is at least one outstanding panic condition known, but more
> testing will be a great help.
>
> Kris
>
> P.S. You didn't mention the status of WITNESS, but I'm assuming you
> read the docs and disabled it since it's a huge performance killer.
WITNESS and INVARIANTS are turned off for the 5.2.1 release bits.
However, the debug.mpsafenet sysctl is also turned off. Turning this
on might give a significant performance boost for bridging.
Scott
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