Performance of 4.x vs 5.x (Re: Lifetime of FreeBSD branches)

Matthias Buelow mkb at
Tue May 24 09:30:42 PDT 2005

Freddie Cash wrote:

> The laptop has an ATI IXP chipset, which means the HD is detected and run 
> as a generic UDMA33 device.  The kernel is using the 4BSD scheduler with 
> PREEMPTION enabled, all debugging hints disabled, and all the mpsafe 
> sysctls enabled.

Hmm.. maybe the disk (interface) is just too slow to trigger this when
running in UDMA33 (and a slow notebook disk).. I have observed it on a
SATA Seagate setup (on ICH6 chipset).  Just a wild guess.


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