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Re: Dragonfly and Hyperthreading....

From: Dan Eicher <dan@xxxxxxxxxxxxxx>
Date: Mon, 21 Feb 2005 21:20:40 -0700

On Tue, 22 Feb 2005 03:27:38 +0100, Joerg Sonnenberger wrote:

> 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

I figured it was an IO bottleneck. As an aside, I also get quite a few
"[diagnostic] cache_resolve: had to recurse on <dir>"  and 1 "Warning:
vnode 0xda1708f8 clean/cache_resolution race detected" messages. I'm 
playing around with the gcc34 version and am very impressed with the
quality and stability. 


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