Dragonfly and Hyperthreading....

[Joerg Sonnenberger]

On Mon, Feb 21, 2005 at 07:05:52PM -0700, Dan Eicher wrote:
> I've been testing DragonFly on a dual 242 opteron Via K8T Master2-FAR mobo
> and everything Just Works. The only issue I've seen is when doing a
> buildworld it doesn't utilize the whole power of the cpus, it pretty much
> just tops out at 146% according to "time make -j 3 buildworld".
> Buildkernel can get it up to 169.8% but the same tests on FreeBSD 5.3 and
> current would go ~196%.

That's not really surprising. Buildworld does depend quite a lot on IO,
which isn't parallel yet.

Joerg