Freebsd 5.2.1 Performance Woes
kris at obsecurity.org
Wed Sep 29 16:00:55 PDT 2004
On Wed, Sep 29, 2004 at 05:51:53PM -0400, TM4525 at aol.com wrote:
> While I was had a nice little test set up, I figured I'd test Freebsd 4.9
> against 5.2.1 since I had fresh installs handy on separate drives.
> The simple test was as follows:
> Celeron 2.4Ghz processor
> Dual onboard Intel (em) NICs, 32bit, 33Mhz bus
> Traffic Generator -> FreeBSD System -> Server
> I had it set up to route between the 2 interfaces (ie NOT bridged). I
> fired a unidirectional stream of UDP packets (so there was no return traffic
> from the server, which was discarding the packets) at a rate of ~100Kpps.
> The disturbing results:
> FreeBSD 4.9: 33% interrupt usage
> FreeBSD 5.2.1: >80% interrupt usage
> What has happened to the stack?
See the Early Adopter's Guide that was distributed with 5.2.1, or just
don't worry about it and update to 5.3 which has vastly better network
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